/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:57:29,885 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:57:29,888 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:57:29,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-23 06:57:29,995 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:57:30,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:57:30,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:57:30,026 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:57:30,026 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:57:30,026 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:57:30,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:57:30,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:57:30,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:57:30,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:57:30,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:57:30,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:57:30,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:57:30,028 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:57:30,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:57:30,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:57:30,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:57:30,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:57:30,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:57:30,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:57:30,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:57:30,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:57:30,030 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:57:30,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:57:30,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:57:30,031 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:57:30,031 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:57:30,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:57:30,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:57:30,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:57:30,481 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:57:30,481 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:57:30,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-new/count_by_2.i [2020-12-23 06:57:30,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cc8b5b4c6/ebe10fac3a6045ee9a7f081f8520fde3/FLAG29dd22e76 [2020-12-23 06:57:31,277 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:57:31,278 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i [2020-12-23 06:57:31,288 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cc8b5b4c6/ebe10fac3a6045ee9a7f081f8520fde3/FLAG29dd22e76 [2020-12-23 06:57:31,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cc8b5b4c6/ebe10fac3a6045ee9a7f081f8520fde3 [2020-12-23 06:57:31,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:57:31,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:57:31,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:57:31,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:57:31,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:57:31,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:57:31" (1/1) ... [2020-12-23 06:57:31,647 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@681fa216 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31, skipping insertion in model container [2020-12-23 06:57:31,647 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:57:31" (1/1) ... [2020-12-23 06:57:31,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:57:31,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:57:31,827 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i[891,904] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:57:31,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:57:31,847 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:57:31,863 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loop-new/count_by_2.i[891,904] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2020-12-23 06:57:31,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:57:31,882 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:57:31,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31 WrapperNode [2020-12-23 06:57:31,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:57:31,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:57:31,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:57:31,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:57:31,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31" (1/1) ... [2020-12-23 06:57:31,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31" (1/1) ... [2020-12-23 06:57:31,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:57:31,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:57:31,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:57:31,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:57:31,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31" (1/1) ... [2020-12-23 06:57:31,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31" (1/1) ... [2020-12-23 06:57:31,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31" (1/1) ... [2020-12-23 06:57:31,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31" (1/1) ... [2020-12-23 06:57:31,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31" (1/1) ... [2020-12-23 06:57:31,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31" (1/1) ... [2020-12-23 06:57:31,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31" (1/1) ... [2020-12-23 06:57:31,946 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:57:31,947 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:57:31,947 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:57:31,947 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:57:31,948 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:32,050 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:57:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:57:32,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:57:32,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:57:32,358 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:57:32,358 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-23 06:57:32,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:57:32 BoogieIcfgContainer [2020-12-23 06:57:32,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:57:32,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:57:32,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:57:32,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:57:32,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:57:31" (1/3) ... [2020-12-23 06:57:32,375 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19378752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:57:32, skipping insertion in model container [2020-12-23 06:57:32,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:57:31" (2/3) ... [2020-12-23 06:57:32,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19378752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:57:32, skipping insertion in model container [2020-12-23 06:57:32,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:57:32" (3/3) ... [2020-12-23 06:57:32,379 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2020-12-23 06:57:32,386 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:57:32,391 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:57:32,410 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:57:32,484 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:57:32,484 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:57:32,484 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:57:32,484 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:57:32,484 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:57:32,485 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:57:32,485 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:57:32,485 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:57:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2020-12-23 06:57:32,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 06:57:32,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:32,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 06:57:32,509 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:32,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:32,516 INFO L82 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2020-12-23 06:57:32,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:32,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381309580] [2020-12-23 06:57:32,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:32,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381309580] [2020-12-23 06:57:32,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:57:32,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:57:32,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419125811] [2020-12-23 06:57:32,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:57:32,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:32,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:57:32,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:57:32,722 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 3 states. [2020-12-23 06:57:32,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:32,757 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2020-12-23 06:57:32,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:57:32,759 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-23 06:57:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:32,770 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:57:32,770 INFO L226 Difference]: Without dead ends: 10 [2020-12-23 06:57:32,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:57:32,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-23 06:57:32,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2020-12-23 06:57:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-23 06:57:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-23 06:57:32,815 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2020-12-23 06:57:32,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:32,815 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-23 06:57:32,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:57:32,816 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-23 06:57:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 06:57:32,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:32,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:32,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:57:32,817 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:32,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:32,819 INFO L82 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2020-12-23 06:57:32,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:32,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066549851] [2020-12-23 06:57:32,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:32,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066549851] [2020-12-23 06:57:32,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036360414] [2020-12-23 06:57:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:32,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:57:32,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:33,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:33,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:57:33,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171586716] [2020-12-23 06:57:33,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:57:33,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:33,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:57:33,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:57:33,048 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2020-12-23 06:57:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:33,069 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-12-23 06:57:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:57:33,070 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 06:57:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:33,070 INFO L225 Difference]: With dead ends: 16 [2020-12-23 06:57:33,071 INFO L226 Difference]: Without dead ends: 12 [2020-12-23 06:57:33,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:57:33,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-12-23 06:57:33,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2020-12-23 06:57:33,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-23 06:57:33,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-23 06:57:33,075 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2020-12-23 06:57:33,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:33,076 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-23 06:57:33,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:57:33,076 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-23 06:57:33,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:57:33,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:33,077 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:33,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:57:33,291 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:33,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2020-12-23 06:57:33,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:33,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758340929] [2020-12-23 06:57:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:33,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758340929] [2020-12-23 06:57:33,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561494938] [2020-12-23 06:57:33,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:33,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:33,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:33,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:57:33,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:33,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:33,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:33,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:57:33,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661120505] [2020-12-23 06:57:33,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:57:33,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:33,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:57:33,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:57:33,442 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2020-12-23 06:57:33,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:33,465 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2020-12-23 06:57:33,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:57:33,466 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 06:57:33,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:33,466 INFO L225 Difference]: With dead ends: 18 [2020-12-23 06:57:33,466 INFO L226 Difference]: Without dead ends: 14 [2020-12-23 06:57:33,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:57:33,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-23 06:57:33,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-12-23 06:57:33,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-23 06:57:33,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-12-23 06:57:33,471 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-12-23 06:57:33,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:33,472 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-12-23 06:57:33,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:57:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-12-23 06:57:33,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:57:33,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:33,473 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:33,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:33,687 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:33,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:33,688 INFO L82 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2020-12-23 06:57:33,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:33,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523791189] [2020-12-23 06:57:33,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:33,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:33,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523791189] [2020-12-23 06:57:33,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283362101] [2020-12-23 06:57:33,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:33,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:57:33,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:33,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:57:33,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:33,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:33,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:57:33,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919828959] [2020-12-23 06:57:33,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:57:33,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:33,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:57:33,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:57:33,968 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2020-12-23 06:57:34,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:34,011 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-12-23 06:57:34,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:57:34,011 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-23 06:57:34,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:34,012 INFO L225 Difference]: With dead ends: 20 [2020-12-23 06:57:34,013 INFO L226 Difference]: Without dead ends: 16 [2020-12-23 06:57:34,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:57:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-23 06:57:34,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-23 06:57:34,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-23 06:57:34,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-23 06:57:34,018 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-12-23 06:57:34,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:34,018 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-23 06:57:34,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:57:34,019 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-23 06:57:34,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:57:34,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:34,020 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:34,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:34,235 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2020-12-23 06:57:34,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:34,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197405912] [2020-12-23 06:57:34,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:34,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:34,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197405912] [2020-12-23 06:57:34,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238795483] [2020-12-23 06:57:34,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:34,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:34,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:34,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:57:34,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:34,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:34,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:57:34,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106065947] [2020-12-23 06:57:34,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:57:34,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:34,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:57:34,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:57:34,405 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2020-12-23 06:57:34,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:34,437 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-12-23 06:57:34,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:57:34,438 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-12-23 06:57:34,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:34,439 INFO L225 Difference]: With dead ends: 22 [2020-12-23 06:57:34,439 INFO L226 Difference]: Without dead ends: 18 [2020-12-23 06:57:34,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:57:34,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-23 06:57:34,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-23 06:57:34,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-23 06:57:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-12-23 06:57:34,444 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-12-23 06:57:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:34,445 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-12-23 06:57:34,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:57:34,445 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-12-23 06:57:34,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-23 06:57:34,446 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:34,446 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:34,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:34,661 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2020-12-23 06:57:34,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:34,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357894481] [2020-12-23 06:57:34,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:34,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357894481] [2020-12-23 06:57:34,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823804060] [2020-12-23 06:57:34,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:34,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:57:34,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:34,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:57:34,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:34,858 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:34,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:34,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:57:34,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827697576] [2020-12-23 06:57:34,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:57:34,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:34,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:57:34,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:57:34,861 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-12-23 06:57:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:34,890 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-12-23 06:57:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:57:34,891 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-12-23 06:57:34,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:34,892 INFO L225 Difference]: With dead ends: 24 [2020-12-23 06:57:34,892 INFO L226 Difference]: Without dead ends: 20 [2020-12-23 06:57:34,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:57:34,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-23 06:57:34,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-23 06:57:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:57:34,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-23 06:57:34,897 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-12-23 06:57:34,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:34,897 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-23 06:57:34,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:57:34,898 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-23 06:57:34,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:57:34,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:34,898 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:35,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:57:35,112 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2020-12-23 06:57:35,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:35,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585390193] [2020-12-23 06:57:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:35,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:35,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:35,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585390193] [2020-12-23 06:57:35,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66312537] [2020-12-23 06:57:35,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:35,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:57:35,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:35,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:57:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:35,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:35,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:57:35,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314292664] [2020-12-23 06:57:35,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:57:35,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:35,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:57:35,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:57:35,292 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2020-12-23 06:57:35,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:35,324 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-12-23 06:57:35,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:57:35,324 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-12-23 06:57:35,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:35,325 INFO L225 Difference]: With dead ends: 26 [2020-12-23 06:57:35,325 INFO L226 Difference]: Without dead ends: 22 [2020-12-23 06:57:35,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:57:35,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-23 06:57:35,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-12-23 06:57:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-23 06:57:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-12-23 06:57:35,330 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-12-23 06:57:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:35,331 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-12-23 06:57:35,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:57:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-12-23 06:57:35,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 06:57:35,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:35,332 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:35,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:35,546 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:35,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:35,547 INFO L82 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2020-12-23 06:57:35,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:35,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550692368] [2020-12-23 06:57:35,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:35,636 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:35,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550692368] [2020-12-23 06:57:35,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982446734] [2020-12-23 06:57:35,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:35,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:57:35,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:35,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:35,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:57:35,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150835801] [2020-12-23 06:57:35,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:57:35,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:35,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:57:35,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:57:35,784 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2020-12-23 06:57:35,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:35,841 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-12-23 06:57:35,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:57:35,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-12-23 06:57:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:35,846 INFO L225 Difference]: With dead ends: 28 [2020-12-23 06:57:35,846 INFO L226 Difference]: Without dead ends: 24 [2020-12-23 06:57:35,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:57:35,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-23 06:57:35,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-23 06:57:35,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-23 06:57:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-12-23 06:57:35,863 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-12-23 06:57:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:35,864 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-12-23 06:57:35,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:57:35,865 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-12-23 06:57:35,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 06:57:35,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:35,867 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:36,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:36,072 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:36,074 INFO L82 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2020-12-23 06:57:36,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:36,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924482364] [2020-12-23 06:57:36,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:36,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924482364] [2020-12-23 06:57:36,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973430127] [2020-12-23 06:57:36,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:36,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:36,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:36,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:57:36,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:36,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:36,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:57:36,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322669246] [2020-12-23 06:57:36,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:57:36,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:36,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:57:36,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:57:36,319 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2020-12-23 06:57:36,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:36,363 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-12-23 06:57:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:57:36,364 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 22 [2020-12-23 06:57:36,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:36,365 INFO L225 Difference]: With dead ends: 30 [2020-12-23 06:57:36,365 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 06:57:36,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:57:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 06:57:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-12-23 06:57:36,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-23 06:57:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-12-23 06:57:36,370 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-12-23 06:57:36,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:36,370 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-12-23 06:57:36,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:57:36,371 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-12-23 06:57:36,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 06:57:36,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:36,372 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:36,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 06:57:36,586 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:36,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:36,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2020-12-23 06:57:36,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:36,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175751520] [2020-12-23 06:57:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:36,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175751520] [2020-12-23 06:57:36,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753700107] [2020-12-23 06:57:36,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:36,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:57:36,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:36,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:57:36,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:36,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:36,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:57:36,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749440098] [2020-12-23 06:57:36,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:57:36,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:36,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:57:36,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:57:36,808 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 13 states. [2020-12-23 06:57:36,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:36,855 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-12-23 06:57:36,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:57:36,856 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-12-23 06:57:36,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:36,857 INFO L225 Difference]: With dead ends: 32 [2020-12-23 06:57:36,857 INFO L226 Difference]: Without dead ends: 28 [2020-12-23 06:57:36,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:57:36,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-23 06:57:36,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-12-23 06:57:36,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:57:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-23 06:57:36,861 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-12-23 06:57:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:36,862 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-23 06:57:36,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:57:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-23 06:57:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:57:36,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:36,863 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:37,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:37,072 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:37,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2020-12-23 06:57:37,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:37,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117789187] [2020-12-23 06:57:37,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:37,197 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:37,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117789187] [2020-12-23 06:57:37,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153060726] [2020-12-23 06:57:37,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:37,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:37,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:37,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:57:37,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:37,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:37,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:57:37,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495103738] [2020-12-23 06:57:37,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:57:37,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:37,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:57:37,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:57:37,316 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 14 states. [2020-12-23 06:57:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:37,372 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-12-23 06:57:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:57:37,372 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-12-23 06:57:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:37,373 INFO L225 Difference]: With dead ends: 34 [2020-12-23 06:57:37,373 INFO L226 Difference]: Without dead ends: 30 [2020-12-23 06:57:37,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:57:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-23 06:57:37,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-12-23 06:57:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:57:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-12-23 06:57:37,396 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-12-23 06:57:37,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:37,396 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-12-23 06:57:37,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:57:37,397 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-12-23 06:57:37,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-23 06:57:37,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:37,397 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:37,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:37,612 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:37,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:37,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2020-12-23 06:57:37,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:37,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573931474] [2020-12-23 06:57:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:37,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573931474] [2020-12-23 06:57:37,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368079672] [2020-12-23 06:57:37,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:37,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 06:57:37,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:37,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:57:37,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:37,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:37,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 06:57:37,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918765064] [2020-12-23 06:57:37,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:57:37,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:37,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:57:37,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:57:37,876 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2020-12-23 06:57:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:37,927 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-23 06:57:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:57:37,928 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-12-23 06:57:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:37,929 INFO L225 Difference]: With dead ends: 36 [2020-12-23 06:57:37,929 INFO L226 Difference]: Without dead ends: 32 [2020-12-23 06:57:37,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:57:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-23 06:57:37,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-12-23 06:57:37,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:57:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-12-23 06:57:37,933 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-12-23 06:57:37,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:37,934 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-12-23 06:57:37,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:57:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-12-23 06:57:37,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-12-23 06:57:37,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:37,935 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:38,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:57:38,146 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:38,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:38,147 INFO L82 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2020-12-23 06:57:38,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:38,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41211279] [2020-12-23 06:57:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:38,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41211279] [2020-12-23 06:57:38,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614519003] [2020-12-23 06:57:38,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:38,393 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:57:38,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:57:38,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:38,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:38,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:57:38,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671946778] [2020-12-23 06:57:38,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:57:38,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:38,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:57:38,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:57:38,458 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 16 states. [2020-12-23 06:57:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:38,530 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-23 06:57:38,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:57:38,531 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2020-12-23 06:57:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:38,531 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:57:38,531 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:57:38,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:57:38,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:57:38,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-12-23 06:57:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-12-23 06:57:38,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-12-23 06:57:38,536 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-12-23 06:57:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:38,536 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-12-23 06:57:38,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:57:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-12-23 06:57:38,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-23 06:57:38,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:38,538 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:38,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:57:38,752 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:38,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2020-12-23 06:57:38,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:38,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297881787] [2020-12-23 06:57:38,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:38,944 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:38,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297881787] [2020-12-23 06:57:38,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182054120] [2020-12-23 06:57:38,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:38,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:57:38,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:39,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:39,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:57:39,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818899334] [2020-12-23 06:57:39,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:57:39,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:39,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:57:39,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:57:39,069 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 17 states. [2020-12-23 06:57:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:39,125 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-12-23 06:57:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:57:39,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 32 [2020-12-23 06:57:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:39,126 INFO L225 Difference]: With dead ends: 40 [2020-12-23 06:57:39,126 INFO L226 Difference]: Without dead ends: 36 [2020-12-23 06:57:39,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:57:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-23 06:57:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-12-23 06:57:39,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 06:57:39,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-23 06:57:39,135 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-12-23 06:57:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:39,135 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-23 06:57:39,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:57:39,136 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-23 06:57:39,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:57:39,136 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:39,136 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:39,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:57:39,347 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:39,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:39,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2020-12-23 06:57:39,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:39,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523601727] [2020-12-23 06:57:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:39,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523601727] [2020-12-23 06:57:39,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130021891] [2020-12-23 06:57:39,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:39,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:39,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:39,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:57:39,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:39,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:39,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:57:39,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427195596] [2020-12-23 06:57:39,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:57:39,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:39,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:57:39,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:57:39,618 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 18 states. [2020-12-23 06:57:39,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:39,691 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-12-23 06:57:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:57:39,692 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 34 [2020-12-23 06:57:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:39,693 INFO L225 Difference]: With dead ends: 42 [2020-12-23 06:57:39,693 INFO L226 Difference]: Without dead ends: 38 [2020-12-23 06:57:39,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:57:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-23 06:57:39,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-12-23 06:57:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-23 06:57:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-12-23 06:57:39,698 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-12-23 06:57:39,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:39,699 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-12-23 06:57:39,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:57:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-12-23 06:57:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-23 06:57:39,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:39,700 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:39,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:39,906 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:39,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:39,907 INFO L82 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2020-12-23 06:57:39,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:39,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851654823] [2020-12-23 06:57:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:40,109 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:40,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851654823] [2020-12-23 06:57:40,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476138137] [2020-12-23 06:57:40,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:40,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 06:57:40,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:40,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:57:40,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:40,228 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:40,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:40,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:57:40,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505676586] [2020-12-23 06:57:40,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:57:40,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:40,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:57:40,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:57:40,233 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 19 states. [2020-12-23 06:57:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:40,289 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-12-23 06:57:40,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:57:40,290 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 36 [2020-12-23 06:57:40,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:40,291 INFO L225 Difference]: With dead ends: 44 [2020-12-23 06:57:40,291 INFO L226 Difference]: Without dead ends: 40 [2020-12-23 06:57:40,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:57:40,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-23 06:57:40,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-12-23 06:57:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-23 06:57:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-12-23 06:57:40,311 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-12-23 06:57:40,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:40,311 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-12-23 06:57:40,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:57:40,311 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-12-23 06:57:40,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-12-23 06:57:40,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:40,313 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:40,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:57:40,528 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:40,529 INFO L82 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2020-12-23 06:57:40,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:40,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785402511] [2020-12-23 06:57:40,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:40,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:40,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785402511] [2020-12-23 06:57:40,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772370033] [2020-12-23 06:57:40,768 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:40,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:40,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:40,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:57:40,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:40,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:40,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 06:57:40,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666944943] [2020-12-23 06:57:40,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:57:40,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:40,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:57:40,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:57:40,892 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 20 states. [2020-12-23 06:57:40,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:40,976 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-23 06:57:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:57:40,977 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-12-23 06:57:40,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:40,978 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:57:40,978 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:57:40,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:57:40,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:57:40,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-12-23 06:57:40,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-12-23 06:57:40,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-12-23 06:57:40,983 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-12-23 06:57:40,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:40,983 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-12-23 06:57:40,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:57:40,984 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-12-23 06:57:40,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-23 06:57:40,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:40,985 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:41,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:57:41,199 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:41,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:41,200 INFO L82 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2020-12-23 06:57:41,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:41,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258006506] [2020-12-23 06:57:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:41,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:41,426 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:41,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258006506] [2020-12-23 06:57:41,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499696222] [2020-12-23 06:57:41,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:41,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 06:57:41,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:41,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:57:41,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:41,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:41,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 06:57:41,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371662176] [2020-12-23 06:57:41,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:57:41,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:41,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:57:41,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:57:41,553 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 21 states. [2020-12-23 06:57:41,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:41,646 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-12-23 06:57:41,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:57:41,647 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-12-23 06:57:41,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:41,648 INFO L225 Difference]: With dead ends: 48 [2020-12-23 06:57:41,648 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:57:41,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:57:41,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:57:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-12-23 06:57:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 06:57:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-23 06:57:41,653 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-12-23 06:57:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:41,653 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-23 06:57:41,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:57:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-23 06:57:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:57:41,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:41,654 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:41,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:57:41,855 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:41,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2020-12-23 06:57:41,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:41,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807607342] [2020-12-23 06:57:41,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:42,154 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:42,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807607342] [2020-12-23 06:57:42,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465068536] [2020-12-23 06:57:42,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:42,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:57:42,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:42,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:57:42,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:42,266 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:42,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:42,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:57:42,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180025566] [2020-12-23 06:57:42,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:57:42,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:42,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:57:42,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:57:42,269 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 22 states. [2020-12-23 06:57:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:42,327 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-12-23 06:57:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:57:42,328 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-12-23 06:57:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:42,328 INFO L225 Difference]: With dead ends: 50 [2020-12-23 06:57:42,329 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:57:42,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:57:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:57:42,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-12-23 06:57:42,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-23 06:57:42,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-12-23 06:57:42,334 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-12-23 06:57:42,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:42,334 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-12-23 06:57:42,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:57:42,334 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-12-23 06:57:42,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-23 06:57:42,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:42,335 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:42,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:42,550 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:42,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:42,550 INFO L82 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2020-12-23 06:57:42,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:42,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801337091] [2020-12-23 06:57:42,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:42,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:42,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801337091] [2020-12-23 06:57:42,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017309092] [2020-12-23 06:57:42,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:42,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:57:42,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:42,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:42,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:57:42,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693449878] [2020-12-23 06:57:42,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:57:42,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:42,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:57:42,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:57:42,954 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 23 states. [2020-12-23 06:57:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:43,034 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-12-23 06:57:43,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:57:43,034 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-12-23 06:57:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:43,035 INFO L225 Difference]: With dead ends: 52 [2020-12-23 06:57:43,035 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:57:43,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:57:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:57:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-23 06:57:43,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 06:57:43,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-12-23 06:57:43,040 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-12-23 06:57:43,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:43,040 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-12-23 06:57:43,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:57:43,040 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-12-23 06:57:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-23 06:57:43,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:43,042 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:43,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:43,256 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:43,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:43,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2020-12-23 06:57:43,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:43,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286601916] [2020-12-23 06:57:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:43,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286601916] [2020-12-23 06:57:43,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658723461] [2020-12-23 06:57:43,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:43,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:43,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:43,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:57:43,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:43,698 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:43,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:43,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:57:43,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042790901] [2020-12-23 06:57:43,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:57:43,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:43,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:57:43,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:57:43,701 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 24 states. [2020-12-23 06:57:43,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:43,798 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-23 06:57:43,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:57:43,798 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 46 [2020-12-23 06:57:43,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:43,799 INFO L225 Difference]: With dead ends: 54 [2020-12-23 06:57:43,799 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:57:43,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:57:43,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:57:43,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-12-23 06:57:43,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-23 06:57:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-12-23 06:57:43,805 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-12-23 06:57:43,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:43,805 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-12-23 06:57:43,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:57:43,805 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-12-23 06:57:43,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-23 06:57:43,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:43,806 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:44,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:57:44,020 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:44,021 INFO L82 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2020-12-23 06:57:44,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:44,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541911591] [2020-12-23 06:57:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:44,391 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541911591] [2020-12-23 06:57:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072788155] [2020-12-23 06:57:44,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:44,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 06:57:44,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:44,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:57:44,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:44,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:44,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:57:44,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111496296] [2020-12-23 06:57:44,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:57:44,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:44,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:57:44,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:57:44,513 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 25 states. [2020-12-23 06:57:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:44,593 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-12-23 06:57:44,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:57:44,595 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 48 [2020-12-23 06:57:44,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:44,596 INFO L225 Difference]: With dead ends: 56 [2020-12-23 06:57:44,596 INFO L226 Difference]: Without dead ends: 52 [2020-12-23 06:57:44,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:57:44,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-23 06:57:44,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-12-23 06:57:44,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 06:57:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-23 06:57:44,600 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-12-23 06:57:44,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:44,601 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-23 06:57:44,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:57:44,601 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-23 06:57:44,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:57:44,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:44,602 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:44,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:57:44,816 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:44,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:44,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2020-12-23 06:57:44,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:44,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466326035] [2020-12-23 06:57:44,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:45,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466326035] [2020-12-23 06:57:45,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883916949] [2020-12-23 06:57:45,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:45,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:45,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:45,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:57:45,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:45,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:45,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 06:57:45,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374216614] [2020-12-23 06:57:45,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:57:45,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:45,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:57:45,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:57:45,338 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 26 states. [2020-12-23 06:57:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:45,424 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-12-23 06:57:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:57:45,425 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 50 [2020-12-23 06:57:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:45,425 INFO L225 Difference]: With dead ends: 58 [2020-12-23 06:57:45,425 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 06:57:45,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:57:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 06:57:45,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-23 06:57:45,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-23 06:57:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-12-23 06:57:45,430 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-12-23 06:57:45,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:45,431 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-12-23 06:57:45,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:57:45,431 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-12-23 06:57:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-23 06:57:45,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:45,431 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:45,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:45,646 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:45,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:45,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2020-12-23 06:57:45,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:45,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667218526] [2020-12-23 06:57:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:45,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:46,067 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:46,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667218526] [2020-12-23 06:57:46,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351828748] [2020-12-23 06:57:46,067 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:46,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 06:57:46,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:46,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 06:57:46,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:46,202 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:46,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:46,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 06:57:46,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873312063] [2020-12-23 06:57:46,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:57:46,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:46,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:57:46,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:57:46,205 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 27 states. [2020-12-23 06:57:46,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:46,297 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-12-23 06:57:46,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:57:46,297 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 52 [2020-12-23 06:57:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:46,298 INFO L225 Difference]: With dead ends: 60 [2020-12-23 06:57:46,298 INFO L226 Difference]: Without dead ends: 56 [2020-12-23 06:57:46,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:57:46,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-23 06:57:46,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-12-23 06:57:46,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 06:57:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-23 06:57:46,302 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-12-23 06:57:46,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:46,302 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-23 06:57:46,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:57:46,303 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-23 06:57:46,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-23 06:57:46,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:46,303 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:46,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 06:57:46,517 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:46,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2020-12-23 06:57:46,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:46,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976380191] [2020-12-23 06:57:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:46,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976380191] [2020-12-23 06:57:46,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83469886] [2020-12-23 06:57:46,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:47,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 06:57:47,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:47,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:57:47,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:47,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:47,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 06:57:47,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58815526] [2020-12-23 06:57:47,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:57:47,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:47,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:57:47,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:57:47,088 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 28 states. [2020-12-23 06:57:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:47,184 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-23 06:57:47,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:57:47,184 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 54 [2020-12-23 06:57:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:47,185 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:57:47,185 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 06:57:47,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:57:47,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 06:57:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-12-23 06:57:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-23 06:57:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-12-23 06:57:47,188 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-12-23 06:57:47,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:47,189 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-12-23 06:57:47,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:57:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-12-23 06:57:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-23 06:57:47,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:47,190 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:47,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:47,404 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:47,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:47,405 INFO L82 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2020-12-23 06:57:47,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:47,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446974547] [2020-12-23 06:57:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:47,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446974547] [2020-12-23 06:57:47,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521932883] [2020-12-23 06:57:47,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:47,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:57:47,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:47,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:47,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 06:57:47,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426593982] [2020-12-23 06:57:47,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:57:47,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:47,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:57:47,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:57:47,960 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 29 states. [2020-12-23 06:57:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:48,060 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-12-23 06:57:48,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:57:48,061 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 56 [2020-12-23 06:57:48,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:48,061 INFO L225 Difference]: With dead ends: 64 [2020-12-23 06:57:48,061 INFO L226 Difference]: Without dead ends: 60 [2020-12-23 06:57:48,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:57:48,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-23 06:57:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-23 06:57:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 06:57:48,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-23 06:57:48,065 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-12-23 06:57:48,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:48,065 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-23 06:57:48,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:57:48,065 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-23 06:57:48,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 06:57:48,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:48,066 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:48,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:57:48,282 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:48,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2020-12-23 06:57:48,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:48,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288812674] [2020-12-23 06:57:48,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:48,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288812674] [2020-12-23 06:57:48,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849572400] [2020-12-23 06:57:48,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:48,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:48,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:48,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:57:48,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:48,913 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:48,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:48,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 06:57:48,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130388592] [2020-12-23 06:57:48,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:57:48,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:48,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:57:48,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:57:48,915 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 30 states. [2020-12-23 06:57:49,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:49,014 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-12-23 06:57:49,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:57:49,014 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 58 [2020-12-23 06:57:49,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:49,015 INFO L225 Difference]: With dead ends: 66 [2020-12-23 06:57:49,015 INFO L226 Difference]: Without dead ends: 62 [2020-12-23 06:57:49,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:57:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-23 06:57:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-12-23 06:57:49,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-23 06:57:49,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-12-23 06:57:49,019 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-12-23 06:57:49,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:49,019 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-12-23 06:57:49,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:57:49,020 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-12-23 06:57:49,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-23 06:57:49,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:49,020 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:49,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:57:49,234 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:49,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:49,235 INFO L82 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2020-12-23 06:57:49,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:49,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091834947] [2020-12-23 06:57:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:49,740 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:49,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091834947] [2020-12-23 06:57:49,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668625313] [2020-12-23 06:57:49,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:49,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 06:57:49,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:49,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:57:49,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:49,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:49,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 06:57:49,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411001895] [2020-12-23 06:57:49,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:57:49,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:57:49,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:57:49,875 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 31 states. [2020-12-23 06:57:49,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:49,971 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-12-23 06:57:49,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:57:49,972 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 60 [2020-12-23 06:57:49,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:49,972 INFO L225 Difference]: With dead ends: 68 [2020-12-23 06:57:49,972 INFO L226 Difference]: Without dead ends: 64 [2020-12-23 06:57:49,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:57:49,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-23 06:57:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-12-23 06:57:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-23 06:57:49,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-12-23 06:57:49,976 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-12-23 06:57:49,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:49,976 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-12-23 06:57:49,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:57:49,976 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-12-23 06:57:49,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-23 06:57:49,977 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:49,977 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:50,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:57:50,191 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:50,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:50,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2020-12-23 06:57:50,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:50,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706402817] [2020-12-23 06:57:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:50,692 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:50,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706402817] [2020-12-23 06:57:50,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580004467] [2020-12-23 06:57:50,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:50,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:50,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:50,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:57:50,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:50,821 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:50,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:50,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 06:57:50,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804472402] [2020-12-23 06:57:50,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:57:50,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:50,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:57:50,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:57:50,823 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 32 states. [2020-12-23 06:57:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:50,954 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-23 06:57:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:57:50,955 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 62 [2020-12-23 06:57:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:50,955 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:57:50,955 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 06:57:50,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:57:50,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 06:57:50,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-12-23 06:57:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-23 06:57:50,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-12-23 06:57:50,959 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-12-23 06:57:50,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:50,959 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-12-23 06:57:50,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:57:50,959 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-12-23 06:57:50,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-23 06:57:50,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:50,960 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:51,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:57:51,172 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:51,172 INFO L82 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2020-12-23 06:57:51,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:51,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378931301] [2020-12-23 06:57:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:51,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378931301] [2020-12-23 06:57:51,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882016657] [2020-12-23 06:57:51,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:51,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 06:57:51,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:51,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:57:51,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:51,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:51,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 06:57:51,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250787709] [2020-12-23 06:57:51,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:57:51,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:51,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:57:51,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:57:51,906 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 33 states. [2020-12-23 06:57:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:52,030 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-12-23 06:57:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:57:52,030 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 64 [2020-12-23 06:57:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:52,031 INFO L225 Difference]: With dead ends: 72 [2020-12-23 06:57:52,031 INFO L226 Difference]: Without dead ends: 68 [2020-12-23 06:57:52,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:57:52,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-23 06:57:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-12-23 06:57:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 06:57:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-23 06:57:52,034 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-12-23 06:57:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:52,035 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-23 06:57:52,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:57:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-23 06:57:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 06:57:52,036 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:52,036 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:52,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:52,250 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:52,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:52,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2020-12-23 06:57:52,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:52,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901490546] [2020-12-23 06:57:52,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:52,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901490546] [2020-12-23 06:57:52,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744312256] [2020-12-23 06:57:52,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:52,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 06:57:52,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:52,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:57:52,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:53,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:53,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 06:57:53,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237857846] [2020-12-23 06:57:53,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:57:53,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:53,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:57:53,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:57:53,080 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 34 states. [2020-12-23 06:57:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:53,202 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-12-23 06:57:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:57:53,203 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 66 [2020-12-23 06:57:53,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:53,204 INFO L225 Difference]: With dead ends: 74 [2020-12-23 06:57:53,204 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 06:57:53,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:57:53,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 06:57:53,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-12-23 06:57:53,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-23 06:57:53,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-12-23 06:57:53,207 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-12-23 06:57:53,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:53,207 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-12-23 06:57:53,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:57:53,207 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-12-23 06:57:53,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-12-23 06:57:53,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:53,208 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:53,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:53,421 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:53,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:53,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2020-12-23 06:57:53,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:53,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141117796] [2020-12-23 06:57:53,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:54,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141117796] [2020-12-23 06:57:54,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746563652] [2020-12-23 06:57:54,122 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:57:54,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:54,276 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:54,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:54,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 06:57:54,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135810502] [2020-12-23 06:57:54,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:57:54,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:54,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:57:54,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:57:54,278 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 35 states. [2020-12-23 06:57:54,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:54,407 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-12-23 06:57:54,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:57:54,407 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 68 [2020-12-23 06:57:54,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:54,408 INFO L225 Difference]: With dead ends: 76 [2020-12-23 06:57:54,408 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 06:57:54,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:57:54,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 06:57:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-12-23 06:57:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-23 06:57:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-12-23 06:57:54,412 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-12-23 06:57:54,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:54,412 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-12-23 06:57:54,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:57:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-12-23 06:57:54,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-23 06:57:54,413 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:54,413 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:54,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:54,627 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:54,628 INFO L82 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2020-12-23 06:57:54,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:54,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463166534] [2020-12-23 06:57:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:55,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463166534] [2020-12-23 06:57:55,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557463404] [2020-12-23 06:57:55,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:55,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:57:55,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:55,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:57:55,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:55,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:55,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:55,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 06:57:55,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441462149] [2020-12-23 06:57:55,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:57:55,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:55,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:57:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:57:55,489 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 36 states. [2020-12-23 06:57:55,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:55,626 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-23 06:57:55,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:57:55,627 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 70 [2020-12-23 06:57:55,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:55,628 INFO L225 Difference]: With dead ends: 78 [2020-12-23 06:57:55,628 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 06:57:55,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:57:55,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 06:57:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-12-23 06:57:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-23 06:57:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-12-23 06:57:55,632 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-12-23 06:57:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:55,633 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-12-23 06:57:55,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:57:55,633 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-12-23 06:57:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-23 06:57:55,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:55,634 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:55,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:57:55,850 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:55,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:55,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2020-12-23 06:57:55,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:55,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177548598] [2020-12-23 06:57:55,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:56,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:56,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177548598] [2020-12-23 06:57:56,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337764845] [2020-12-23 06:57:56,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:56,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-23 06:57:56,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:56,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:57:56,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:56,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:56,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:56,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 06:57:56,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790254836] [2020-12-23 06:57:56,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:57:56,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:56,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:57:56,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:57:56,703 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 37 states. [2020-12-23 06:57:56,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:56,841 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-12-23 06:57:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:57:56,842 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 72 [2020-12-23 06:57:56,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:56,842 INFO L225 Difference]: With dead ends: 80 [2020-12-23 06:57:56,843 INFO L226 Difference]: Without dead ends: 76 [2020-12-23 06:57:56,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:57:56,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-23 06:57:56,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-12-23 06:57:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 06:57:56,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-23 06:57:56,847 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-12-23 06:57:56,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:56,847 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-23 06:57:56,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:57:56,847 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-23 06:57:56,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 06:57:56,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:56,848 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:57,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:57,063 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:57,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:57,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2020-12-23 06:57:57,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:57,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764512737] [2020-12-23 06:57:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:57,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764512737] [2020-12-23 06:57:57,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426398633] [2020-12-23 06:57:57,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:57,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:57:57,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:57,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:57:57,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:58,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:58,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 06:57:58,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092904617] [2020-12-23 06:57:58,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:57:58,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:58,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:57:58,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:57:58,027 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 38 states. [2020-12-23 06:57:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:58,135 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-12-23 06:57:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:57:58,135 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 74 [2020-12-23 06:57:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:58,136 INFO L225 Difference]: With dead ends: 82 [2020-12-23 06:57:58,136 INFO L226 Difference]: Without dead ends: 78 [2020-12-23 06:57:58,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:57:58,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-23 06:57:58,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-12-23 06:57:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-23 06:57:58,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-12-23 06:57:58,139 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-12-23 06:57:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:58,140 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-12-23 06:57:58,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:57:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-12-23 06:57:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-23 06:57:58,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:58,141 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:58,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:57:58,355 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:58,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:58,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2020-12-23 06:57:58,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:58,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341009835] [2020-12-23 06:57:58,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:58,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:57:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:59,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341009835] [2020-12-23 06:57:59,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15923316] [2020-12-23 06:57:59,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:57:59,268 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-23 06:57:59,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:57:59,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:57:59,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:57:59,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:57:59,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:57:59,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 06:57:59,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737794424] [2020-12-23 06:57:59,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:57:59,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:57:59,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:57:59,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:57:59,368 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 39 states. [2020-12-23 06:57:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:57:59,506 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-12-23 06:57:59,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:57:59,506 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-12-23 06:57:59,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:57:59,507 INFO L225 Difference]: With dead ends: 84 [2020-12-23 06:57:59,507 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 06:57:59,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:57:59,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 06:57:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-12-23 06:57:59,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 06:57:59,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-12-23 06:57:59,511 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-12-23 06:57:59,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:57:59,512 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-12-23 06:57:59,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:57:59,512 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-12-23 06:57:59,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-23 06:57:59,512 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:57:59,513 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2020-12-23 06:57:59,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:57:59,727 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:57:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:57:59,727 INFO L82 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2020-12-23 06:57:59,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:57:59,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700624188] [2020-12-23 06:57:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:57:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:00,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700624188] [2020-12-23 06:58:00,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070776000] [2020-12-23 06:58:00,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:00,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 06:58:00,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:00,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:58:00,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:00,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:00,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 06:58:00,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264165403] [2020-12-23 06:58:00,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:58:00,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:00,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:58:00,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:58:00,802 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 40 states. [2020-12-23 06:58:00,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:00,951 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-12-23 06:58:00,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:58:00,952 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 78 [2020-12-23 06:58:00,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:00,953 INFO L225 Difference]: With dead ends: 86 [2020-12-23 06:58:00,953 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 06:58:00,954 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:58:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 06:58:00,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-12-23 06:58:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 06:58:00,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-12-23 06:58:00,957 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-12-23 06:58:00,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:00,957 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-12-23 06:58:00,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:58:00,957 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-12-23 06:58:00,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-12-23 06:58:00,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:00,958 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:01,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:58:01,174 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:01,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:01,174 INFO L82 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2020-12-23 06:58:01,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:01,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445869158] [2020-12-23 06:58:01,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:02,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445869158] [2020-12-23 06:58:02,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357668750] [2020-12-23 06:58:02,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:02,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:58:02,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:02,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:02,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 06:58:02,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259129998] [2020-12-23 06:58:02,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:58:02,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:02,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:58:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:58:02,219 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 41 states. [2020-12-23 06:58:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:02,377 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-12-23 06:58:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:58:02,378 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 80 [2020-12-23 06:58:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:02,378 INFO L225 Difference]: With dead ends: 88 [2020-12-23 06:58:02,379 INFO L226 Difference]: Without dead ends: 84 [2020-12-23 06:58:02,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:58:02,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-23 06:58:02,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-12-23 06:58:02,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 06:58:02,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-12-23 06:58:02,382 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-12-23 06:58:02,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:02,383 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-12-23 06:58:02,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:58:02,383 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-12-23 06:58:02,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 06:58:02,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:02,383 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:02,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:58:02,598 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:02,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2020-12-23 06:58:02,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:02,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367236168] [2020-12-23 06:58:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:03,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:03,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367236168] [2020-12-23 06:58:03,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661085328] [2020-12-23 06:58:03,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:03,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:03,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:03,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:58:03,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:03,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:03,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 06:58:03,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852840607] [2020-12-23 06:58:03,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:58:03,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:03,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:58:03,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:58:03,727 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 42 states. [2020-12-23 06:58:03,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:03,899 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-12-23 06:58:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:58:03,899 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 82 [2020-12-23 06:58:03,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:03,900 INFO L225 Difference]: With dead ends: 90 [2020-12-23 06:58:03,900 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 06:58:03,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:58:03,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 06:58:03,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-12-23 06:58:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-23 06:58:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-12-23 06:58:03,904 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-12-23 06:58:03,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:03,905 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-12-23 06:58:03,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:58:03,905 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-12-23 06:58:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-23 06:58:03,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:03,905 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:04,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:58:04,119 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:04,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:04,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2020-12-23 06:58:04,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:04,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313662871] [2020-12-23 06:58:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:05,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313662871] [2020-12-23 06:58:05,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946186619] [2020-12-23 06:58:05,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:05,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 06:58:05,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:05,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:58:05,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:05,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:05,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 06:58:05,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542494893] [2020-12-23 06:58:05,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:58:05,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:05,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:58:05,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:58:05,309 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 43 states. [2020-12-23 06:58:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:05,446 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-12-23 06:58:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:58:05,447 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 84 [2020-12-23 06:58:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:05,447 INFO L225 Difference]: With dead ends: 92 [2020-12-23 06:58:05,447 INFO L226 Difference]: Without dead ends: 88 [2020-12-23 06:58:05,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:58:05,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-23 06:58:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-12-23 06:58:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 06:58:05,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-12-23 06:58:05,452 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-12-23 06:58:05,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:05,452 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-12-23 06:58:05,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:58:05,453 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-12-23 06:58:05,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-23 06:58:05,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:05,453 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:05,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:58:05,666 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:05,667 INFO L82 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2020-12-23 06:58:05,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:05,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551786439] [2020-12-23 06:58:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:05,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:06,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551786439] [2020-12-23 06:58:06,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914195378] [2020-12-23 06:58:06,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:06,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:06,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:06,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:58:06,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:06,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:06,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:06,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 06:58:06,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181453211] [2020-12-23 06:58:06,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:58:06,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:06,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:58:06,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:58:06,882 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 44 states. [2020-12-23 06:58:07,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:07,005 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-12-23 06:58:07,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:58:07,006 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 86 [2020-12-23 06:58:07,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:07,007 INFO L225 Difference]: With dead ends: 94 [2020-12-23 06:58:07,007 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 06:58:07,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:58:07,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 06:58:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-12-23 06:58:07,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-23 06:58:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-12-23 06:58:07,018 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-12-23 06:58:07,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:07,019 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-12-23 06:58:07,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:58:07,019 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-12-23 06:58:07,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-12-23 06:58:07,019 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:07,020 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:07,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:07,234 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:07,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:07,235 INFO L82 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2020-12-23 06:58:07,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:07,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525962772] [2020-12-23 06:58:07,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:07,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:08,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525962772] [2020-12-23 06:58:08,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368073960] [2020-12-23 06:58:08,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:08,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 06:58:08,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:08,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:58:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:08,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:08,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 06:58:08,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509775758] [2020-12-23 06:58:08,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:58:08,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:08,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:58:08,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:58:08,488 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 45 states. [2020-12-23 06:58:08,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:08,659 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-12-23 06:58:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:58:08,659 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 88 [2020-12-23 06:58:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:08,660 INFO L225 Difference]: With dead ends: 96 [2020-12-23 06:58:08,660 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 06:58:08,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:58:08,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 06:58:08,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-12-23 06:58:08,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 06:58:08,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-12-23 06:58:08,665 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-12-23 06:58:08,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:08,665 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-12-23 06:58:08,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:58:08,665 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-12-23 06:58:08,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 06:58:08,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:08,666 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:08,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 06:58:08,881 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:08,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:08,881 INFO L82 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2020-12-23 06:58:08,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:08,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563032654] [2020-12-23 06:58:08,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:10,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563032654] [2020-12-23 06:58:10,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714749025] [2020-12-23 06:58:10,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:10,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-23 06:58:10,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:10,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 06:58:10,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:10,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:10,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 06:58:10,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943128428] [2020-12-23 06:58:10,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 06:58:10,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:10,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 06:58:10,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:58:10,294 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 46 states. [2020-12-23 06:58:10,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:10,496 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-12-23 06:58:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:58:10,497 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 90 [2020-12-23 06:58:10,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:10,498 INFO L225 Difference]: With dead ends: 98 [2020-12-23 06:58:10,498 INFO L226 Difference]: Without dead ends: 94 [2020-12-23 06:58:10,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:58:10,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-23 06:58:10,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-12-23 06:58:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 06:58:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-12-23 06:58:10,502 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-12-23 06:58:10,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:10,502 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-12-23 06:58:10,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 06:58:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-12-23 06:58:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-12-23 06:58:10,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:10,503 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:10,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:10,711 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:10,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:10,711 INFO L82 PathProgramCache]: Analyzing trace with hash 3354371, now seen corresponding path program 43 times [2020-12-23 06:58:10,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:10,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486484795] [2020-12-23 06:58:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:11,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486484795] [2020-12-23 06:58:11,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541865600] [2020-12-23 06:58:11,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:11,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:11,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:58:11,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:12,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:12,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 06:58:12,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854811732] [2020-12-23 06:58:12,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:58:12,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:12,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:58:12,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:58:12,089 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 47 states. [2020-12-23 06:58:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:12,258 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-12-23 06:58:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:58:12,259 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 92 [2020-12-23 06:58:12,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:12,260 INFO L225 Difference]: With dead ends: 100 [2020-12-23 06:58:12,260 INFO L226 Difference]: Without dead ends: 96 [2020-12-23 06:58:12,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:58:12,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-23 06:58:12,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-12-23 06:58:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-23 06:58:12,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-12-23 06:58:12,265 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-12-23 06:58:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:12,265 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-12-23 06:58:12,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:58:12,265 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-12-23 06:58:12,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-23 06:58:12,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:12,266 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:12,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:12,480 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:12,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:12,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1018184443, now seen corresponding path program 44 times [2020-12-23 06:58:12,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:12,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758518091] [2020-12-23 06:58:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:13,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758518091] [2020-12-23 06:58:13,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370963995] [2020-12-23 06:58:13,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:13,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:13,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:13,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:58:13,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:13,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:13,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 06:58:13,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612317031] [2020-12-23 06:58:13,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 06:58:13,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:13,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 06:58:13,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:58:13,926 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 48 states. [2020-12-23 06:58:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:14,124 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-12-23 06:58:14,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:58:14,124 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 94 [2020-12-23 06:58:14,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:14,125 INFO L225 Difference]: With dead ends: 102 [2020-12-23 06:58:14,126 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 06:58:14,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:58:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 06:58:14,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-12-23 06:58:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-23 06:58:14,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-12-23 06:58:14,130 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-12-23 06:58:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:14,131 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-12-23 06:58:14,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 06:58:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-12-23 06:58:14,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-23 06:58:14,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:14,131 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:14,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 06:58:14,345 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:14,345 INFO L82 PathProgramCache]: Analyzing trace with hash 830526087, now seen corresponding path program 45 times [2020-12-23 06:58:14,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:14,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165699442] [2020-12-23 06:58:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:15,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165699442] [2020-12-23 06:58:15,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161602744] [2020-12-23 06:58:15,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:15,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-23 06:58:15,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:15,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:58:15,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:15,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:15,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 06:58:15,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734393265] [2020-12-23 06:58:15,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 06:58:15,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:15,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 06:58:15,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:58:15,912 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 49 states. [2020-12-23 06:58:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:16,097 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-12-23 06:58:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 06:58:16,098 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 96 [2020-12-23 06:58:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:16,099 INFO L225 Difference]: With dead ends: 104 [2020-12-23 06:58:16,099 INFO L226 Difference]: Without dead ends: 100 [2020-12-23 06:58:16,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:58:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-23 06:58:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-12-23 06:58:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 06:58:16,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-12-23 06:58:16,103 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-12-23 06:58:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:16,104 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-12-23 06:58:16,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 06:58:16,104 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-12-23 06:58:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 06:58:16,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:16,104 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:16,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 06:58:16,320 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:16,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:16,320 INFO L82 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 46 times [2020-12-23 06:58:16,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:16,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48058152] [2020-12-23 06:58:16,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:17,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48058152] [2020-12-23 06:58:17,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939700352] [2020-12-23 06:58:17,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:17,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:17,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:17,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:58:17,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:17,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:17,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-23 06:58:17,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375016863] [2020-12-23 06:58:17,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 06:58:17,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:17,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 06:58:17,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:58:17,951 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 50 states. [2020-12-23 06:58:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:18,109 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-12-23 06:58:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 06:58:18,112 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 98 [2020-12-23 06:58:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:18,112 INFO L225 Difference]: With dead ends: 106 [2020-12-23 06:58:18,113 INFO L226 Difference]: Without dead ends: 102 [2020-12-23 06:58:18,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:58:18,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-23 06:58:18,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-12-23 06:58:18,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-23 06:58:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-12-23 06:58:18,117 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-12-23 06:58:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:18,117 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-12-23 06:58:18,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 06:58:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-12-23 06:58:18,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-23 06:58:18,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:18,118 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:18,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 06:58:18,328 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:18,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:18,328 INFO L82 PathProgramCache]: Analyzing trace with hash -192343029, now seen corresponding path program 47 times [2020-12-23 06:58:18,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:18,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443194152] [2020-12-23 06:58:18,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:19,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443194152] [2020-12-23 06:58:19,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432563946] [2020-12-23 06:58:19,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:19,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-23 06:58:19,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:19,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 06:58:19,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:19,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:19,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 06:58:19,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482834246] [2020-12-23 06:58:19,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 06:58:19,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:19,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 06:58:19,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:58:19,913 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 51 states. [2020-12-23 06:58:20,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:20,091 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-12-23 06:58:20,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 06:58:20,092 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 100 [2020-12-23 06:58:20,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:20,093 INFO L225 Difference]: With dead ends: 108 [2020-12-23 06:58:20,093 INFO L226 Difference]: Without dead ends: 104 [2020-12-23 06:58:20,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:58:20,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-23 06:58:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-23 06:58:20,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-23 06:58:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-12-23 06:58:20,099 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-12-23 06:58:20,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:20,099 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-12-23 06:58:20,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 06:58:20,099 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-12-23 06:58:20,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-23 06:58:20,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:20,100 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:20,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:20,310 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:20,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:20,310 INFO L82 PathProgramCache]: Analyzing trace with hash -104824819, now seen corresponding path program 48 times [2020-12-23 06:58:20,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:20,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617825284] [2020-12-23 06:58:20,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:21,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617825284] [2020-12-23 06:58:21,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280926933] [2020-12-23 06:58:21,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:21,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-23 06:58:21,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:21,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 06:58:21,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:22,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:22,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 06:58:22,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868539045] [2020-12-23 06:58:22,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 06:58:22,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:22,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 06:58:22,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:58:22,060 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 52 states. [2020-12-23 06:58:22,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:22,266 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-12-23 06:58:22,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:58:22,267 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 102 [2020-12-23 06:58:22,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:22,268 INFO L225 Difference]: With dead ends: 110 [2020-12-23 06:58:22,268 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 06:58:22,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:58:22,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 06:58:22,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-12-23 06:58:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-12-23 06:58:22,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-12-23 06:58:22,273 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-12-23 06:58:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:22,273 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-12-23 06:58:22,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 06:58:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-12-23 06:58:22,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-23 06:58:22,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:22,274 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:22,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 06:58:22,488 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:22,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:22,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1899170929, now seen corresponding path program 49 times [2020-12-23 06:58:22,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:22,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15776972] [2020-12-23 06:58:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:24,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15776972] [2020-12-23 06:58:24,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596343903] [2020-12-23 06:58:24,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:24,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:58:24,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:24,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:24,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-23 06:58:24,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676911873] [2020-12-23 06:58:24,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 06:58:24,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:24,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 06:58:24,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:58:24,308 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 53 states. [2020-12-23 06:58:24,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:24,525 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-12-23 06:58:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 06:58:24,526 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 104 [2020-12-23 06:58:24,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:24,527 INFO L225 Difference]: With dead ends: 112 [2020-12-23 06:58:24,527 INFO L226 Difference]: Without dead ends: 108 [2020-12-23 06:58:24,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:58:24,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-23 06:58:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-12-23 06:58:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 06:58:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-12-23 06:58:24,531 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-12-23 06:58:24,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:24,531 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-12-23 06:58:24,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 06:58:24,531 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-12-23 06:58:24,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 06:58:24,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:24,532 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:24,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 06:58:24,744 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:24,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:24,745 INFO L82 PathProgramCache]: Analyzing trace with hash 311070353, now seen corresponding path program 50 times [2020-12-23 06:58:24,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:24,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35790029] [2020-12-23 06:58:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:26,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:26,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35790029] [2020-12-23 06:58:26,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126464934] [2020-12-23 06:58:26,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:26,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:26,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:26,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:58:26,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:26,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:26,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 06:58:26,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686740927] [2020-12-23 06:58:26,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 06:58:26,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:26,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 06:58:26,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:58:26,633 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 54 states. [2020-12-23 06:58:26,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:26,888 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-12-23 06:58:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 06:58:26,888 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 106 [2020-12-23 06:58:26,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:26,889 INFO L225 Difference]: With dead ends: 114 [2020-12-23 06:58:26,889 INFO L226 Difference]: Without dead ends: 110 [2020-12-23 06:58:26,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:58:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-23 06:58:26,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-12-23 06:58:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-23 06:58:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-12-23 06:58:26,893 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-12-23 06:58:26,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:26,894 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-12-23 06:58:26,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 06:58:26,894 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-12-23 06:58:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-12-23 06:58:26,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:26,895 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:27,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:27,105 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1655869165, now seen corresponding path program 51 times [2020-12-23 06:58:27,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:27,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093196565] [2020-12-23 06:58:27,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:28,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093196565] [2020-12-23 06:58:28,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087185998] [2020-12-23 06:58:28,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:28,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-23 06:58:28,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:28,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:58:28,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:29,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:29,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 06:58:29,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564233871] [2020-12-23 06:58:29,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 06:58:29,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:29,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 06:58:29,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:58:29,080 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 55 states. [2020-12-23 06:58:29,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:29,315 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-12-23 06:58:29,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 06:58:29,315 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 108 [2020-12-23 06:58:29,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:29,316 INFO L225 Difference]: With dead ends: 116 [2020-12-23 06:58:29,316 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 06:58:29,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:58:29,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 06:58:29,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-12-23 06:58:29,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 06:58:29,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-12-23 06:58:29,321 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-12-23 06:58:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:29,321 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-12-23 06:58:29,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 06:58:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-12-23 06:58:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-23 06:58:29,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:29,322 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:29,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-23 06:58:29,536 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:29,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:29,537 INFO L82 PathProgramCache]: Analyzing trace with hash -2099135723, now seen corresponding path program 52 times [2020-12-23 06:58:29,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:29,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536791727] [2020-12-23 06:58:29,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:31,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536791727] [2020-12-23 06:58:31,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419528661] [2020-12-23 06:58:31,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:31,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:31,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:58:31,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:31,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:31,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-23 06:58:31,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710519976] [2020-12-23 06:58:31,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 06:58:31,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:31,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 06:58:31,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:58:31,505 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 56 states. [2020-12-23 06:58:31,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:31,751 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-12-23 06:58:31,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 06:58:31,752 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 110 [2020-12-23 06:58:31,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:31,753 INFO L225 Difference]: With dead ends: 118 [2020-12-23 06:58:31,753 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 06:58:31,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:58:31,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 06:58:31,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-12-23 06:58:31,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 06:58:31,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-12-23 06:58:31,757 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-12-23 06:58:31,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:31,757 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-12-23 06:58:31,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 06:58:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-12-23 06:58:31,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-23 06:58:31,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:31,758 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:31,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:31,973 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:31,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:31,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1418431639, now seen corresponding path program 53 times [2020-12-23 06:58:31,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:31,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321992066] [2020-12-23 06:58:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:33,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321992066] [2020-12-23 06:58:33,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228940291] [2020-12-23 06:58:33,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:33,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-23 06:58:33,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:33,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:58:33,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:33,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:33,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 06:58:33,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561759966] [2020-12-23 06:58:33,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:58:33,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:33,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:58:33,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:58:33,998 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 57 states. [2020-12-23 06:58:34,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:34,256 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-12-23 06:58:34,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 06:58:34,256 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 112 [2020-12-23 06:58:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:34,257 INFO L225 Difference]: With dead ends: 120 [2020-12-23 06:58:34,257 INFO L226 Difference]: Without dead ends: 116 [2020-12-23 06:58:34,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:58:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-23 06:58:34,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-12-23 06:58:34,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 06:58:34,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-12-23 06:58:34,262 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-12-23 06:58:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:34,262 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-12-23 06:58:34,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:58:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-12-23 06:58:34,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 06:58:34,263 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:34,263 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:34,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 06:58:34,476 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:34,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1661404569, now seen corresponding path program 54 times [2020-12-23 06:58:34,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:34,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209757539] [2020-12-23 06:58:34,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:34,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:36,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209757539] [2020-12-23 06:58:36,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900474373] [2020-12-23 06:58:36,438 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:36,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-23 06:58:36,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:36,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 06:58:36,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:36,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:36,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-23 06:58:36,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048678902] [2020-12-23 06:58:36,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 06:58:36,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:36,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 06:58:36,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:58:36,720 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 58 states. [2020-12-23 06:58:36,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:36,939 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-12-23 06:58:36,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:58:36,940 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 114 [2020-12-23 06:58:36,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:36,941 INFO L225 Difference]: With dead ends: 122 [2020-12-23 06:58:36,941 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 06:58:36,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:58:36,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 06:58:36,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-12-23 06:58:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 06:58:36,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-12-23 06:58:36,945 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-12-23 06:58:36,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:36,946 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-12-23 06:58:36,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 06:58:36,946 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-12-23 06:58:36,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-23 06:58:36,947 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:36,947 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:37,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 06:58:37,160 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:37,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:37,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1064810981, now seen corresponding path program 55 times [2020-12-23 06:58:37,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:37,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927358948] [2020-12-23 06:58:37,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:39,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927358948] [2020-12-23 06:58:39,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927011315] [2020-12-23 06:58:39,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:39,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:58:39,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:39,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:39,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-23 06:58:39,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406597611] [2020-12-23 06:58:39,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 06:58:39,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:39,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 06:58:39,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:58:39,407 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 59 states. [2020-12-23 06:58:39,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:39,619 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-12-23 06:58:39,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 06:58:39,620 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 116 [2020-12-23 06:58:39,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:39,621 INFO L225 Difference]: With dead ends: 124 [2020-12-23 06:58:39,621 INFO L226 Difference]: Without dead ends: 120 [2020-12-23 06:58:39,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:58:39,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-23 06:58:39,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-12-23 06:58:39,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-23 06:58:39,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-12-23 06:58:39,627 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-12-23 06:58:39,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:39,627 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-12-23 06:58:39,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 06:58:39,627 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-12-23 06:58:39,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-12-23 06:58:39,628 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:39,628 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:39,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:39,842 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:39,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1027903971, now seen corresponding path program 56 times [2020-12-23 06:58:39,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:39,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361972198] [2020-12-23 06:58:39,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:41,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361972198] [2020-12-23 06:58:41,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248341164] [2020-12-23 06:58:41,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:41,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:58:41,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:41,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:58:41,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:42,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:42,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 06:58:42,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131137630] [2020-12-23 06:58:42,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 06:58:42,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:42,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 06:58:42,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:58:42,159 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 60 states. [2020-12-23 06:58:42,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:42,372 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-12-23 06:58:42,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 06:58:42,373 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 118 [2020-12-23 06:58:42,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:42,374 INFO L225 Difference]: With dead ends: 126 [2020-12-23 06:58:42,374 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 06:58:42,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:58:42,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 06:58:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-12-23 06:58:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 06:58:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-12-23 06:58:42,378 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-12-23 06:58:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:42,378 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-12-23 06:58:42,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 06:58:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-12-23 06:58:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-23 06:58:42,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:42,379 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:42,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 06:58:42,594 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:42,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:42,595 INFO L82 PathProgramCache]: Analyzing trace with hash 79994271, now seen corresponding path program 57 times [2020-12-23 06:58:42,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:42,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727593430] [2020-12-23 06:58:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:42,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:44,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727593430] [2020-12-23 06:58:44,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987782563] [2020-12-23 06:58:44,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:44,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-23 06:58:44,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:44,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 06:58:44,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:45,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:45,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-23 06:58:45,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372652172] [2020-12-23 06:58:45,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 06:58:45,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:45,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 06:58:45,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:58:45,007 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 61 states. [2020-12-23 06:58:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:45,237 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-12-23 06:58:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 06:58:45,237 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 120 [2020-12-23 06:58:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:45,238 INFO L225 Difference]: With dead ends: 128 [2020-12-23 06:58:45,239 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 06:58:45,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:58:45,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 06:58:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-12-23 06:58:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 06:58:45,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-12-23 06:58:45,243 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-12-23 06:58:45,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:45,243 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-12-23 06:58:45,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 06:58:45,243 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-12-23 06:58:45,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 06:58:45,244 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:45,244 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:45,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:45,457 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:45,458 INFO L82 PathProgramCache]: Analyzing trace with hash -381684575, now seen corresponding path program 58 times [2020-12-23 06:58:45,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:45,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602489595] [2020-12-23 06:58:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:47,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:47,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602489595] [2020-12-23 06:58:47,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107284411] [2020-12-23 06:58:47,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:47,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:58:47,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:47,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 06:58:47,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:47,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:47,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-23 06:58:47,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043409532] [2020-12-23 06:58:47,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 06:58:47,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:47,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 06:58:47,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:58:47,951 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 62 states. [2020-12-23 06:58:48,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:48,221 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-12-23 06:58:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 06:58:48,221 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 122 [2020-12-23 06:58:48,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:48,222 INFO L225 Difference]: With dead ends: 130 [2020-12-23 06:58:48,222 INFO L226 Difference]: Without dead ends: 126 [2020-12-23 06:58:48,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:58:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-23 06:58:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-12-23 06:58:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 06:58:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-12-23 06:58:48,227 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-12-23 06:58:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:48,227 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-12-23 06:58:48,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 06:58:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-12-23 06:58:48,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-23 06:58:48,228 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:48,228 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:48,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 06:58:48,442 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:48,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:48,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1673424093, now seen corresponding path program 59 times [2020-12-23 06:58:48,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:48,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502005572] [2020-12-23 06:58:48,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:50,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502005572] [2020-12-23 06:58:50,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532170635] [2020-12-23 06:58:50,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:50,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-23 06:58:50,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:50,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 06:58:50,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:50,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:50,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 06:58:50,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157455368] [2020-12-23 06:58:50,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 06:58:50,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:50,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 06:58:50,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:58:50,977 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 63 states. [2020-12-23 06:58:51,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:51,287 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-12-23 06:58:51,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 06:58:51,288 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 124 [2020-12-23 06:58:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:51,289 INFO L225 Difference]: With dead ends: 132 [2020-12-23 06:58:51,289 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 06:58:51,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:58:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 06:58:51,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-12-23 06:58:51,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-23 06:58:51,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-12-23 06:58:51,293 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-12-23 06:58:51,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:51,293 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-12-23 06:58:51,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 06:58:51,293 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-12-23 06:58:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-23 06:58:51,294 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:51,294 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:51,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 06:58:51,508 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:51,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:51,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1789552347, now seen corresponding path program 60 times [2020-12-23 06:58:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:51,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471346610] [2020-12-23 06:58:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:53,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471346610] [2020-12-23 06:58:53,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54011006] [2020-12-23 06:58:53,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:54,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-23 06:58:54,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:58:54,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 06:58:54,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:54,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:54,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-23 06:58:54,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398519701] [2020-12-23 06:58:54,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 06:58:54,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:54,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 06:58:54,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:58:54,268 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 64 states. [2020-12-23 06:58:54,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:54,562 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-12-23 06:58:54,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:58:54,562 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 126 [2020-12-23 06:58:54,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:54,563 INFO L225 Difference]: With dead ends: 134 [2020-12-23 06:58:54,563 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 06:58:54,564 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:58:54,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 06:58:54,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-12-23 06:58:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 06:58:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-12-23 06:58:54,569 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-12-23 06:58:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:54,569 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-12-23 06:58:54,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 06:58:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-12-23 06:58:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-23 06:58:54,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:54,571 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:54,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:54,785 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1719654745, now seen corresponding path program 61 times [2020-12-23 06:58:54,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:54,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387917331] [2020-12-23 06:58:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:54,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:57,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:57,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387917331] [2020-12-23 06:58:57,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273838017] [2020-12-23 06:58:57,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:58:57,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:58:57,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:58:57,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:58:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:58:57,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:58:57,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-23 06:58:57,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690327115] [2020-12-23 06:58:57,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 06:58:57,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:58:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 06:58:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:58:57,532 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 65 states. [2020-12-23 06:58:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:58:57,824 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-12-23 06:58:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 06:58:57,825 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 128 [2020-12-23 06:58:57,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:58:57,826 INFO L225 Difference]: With dead ends: 136 [2020-12-23 06:58:57,826 INFO L226 Difference]: Without dead ends: 132 [2020-12-23 06:58:57,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:58:57,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-23 06:58:57,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-12-23 06:58:57,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 06:58:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-12-23 06:58:57,831 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-12-23 06:58:57,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:58:57,831 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-12-23 06:58:57,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 06:58:57,831 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-12-23 06:58:57,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 06:58:57,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:58:57,832 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1] [2020-12-23 06:58:58,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:58:58,045 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:58:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:58:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1027431337, now seen corresponding path program 62 times [2020-12-23 06:58:58,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:58:58,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685365951] [2020-12-23 06:58:58,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:58:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:00,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:00,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685365951] [2020-12-23 06:59:00,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422534212] [2020-12-23 06:59:00,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:00,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:59:00,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:59:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:00,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:00,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 06:59:00,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874982052] [2020-12-23 06:59:00,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 06:59:00,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:00,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 06:59:00,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:59:00,940 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 66 states. [2020-12-23 06:59:01,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:01,254 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-12-23 06:59:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 06:59:01,255 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 130 [2020-12-23 06:59:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:01,256 INFO L225 Difference]: With dead ends: 138 [2020-12-23 06:59:01,256 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 06:59:01,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:59:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 06:59:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-12-23 06:59:01,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 06:59:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-12-23 06:59:01,259 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-12-23 06:59:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:01,259 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-12-23 06:59:01,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 06:59:01,260 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-12-23 06:59:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-23 06:59:01,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:01,261 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:01,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:01,474 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:01,474 INFO L82 PathProgramCache]: Analyzing trace with hash -427730901, now seen corresponding path program 63 times [2020-12-23 06:59:01,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:01,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190746201] [2020-12-23 06:59:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:04,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:04,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190746201] [2020-12-23 06:59:04,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384488922] [2020-12-23 06:59:04,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:04,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-23 06:59:04,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:04,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 06:59:04,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:04,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:04,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-23 06:59:04,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900401607] [2020-12-23 06:59:04,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 06:59:04,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:04,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 06:59:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:59:04,508 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 67 states. [2020-12-23 06:59:04,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:04,837 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-12-23 06:59:04,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 06:59:04,837 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 132 [2020-12-23 06:59:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:04,838 INFO L225 Difference]: With dead ends: 140 [2020-12-23 06:59:04,838 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 06:59:04,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:59:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 06:59:04,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-12-23 06:59:04,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-23 06:59:04,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2020-12-23 06:59:04,842 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2020-12-23 06:59:04,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:04,843 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2020-12-23 06:59:04,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 06:59:04,843 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2020-12-23 06:59:04,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-23 06:59:04,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:04,844 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:05,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:05,058 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:05,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:05,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1320696877, now seen corresponding path program 64 times [2020-12-23 06:59:05,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:05,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536607880] [2020-12-23 06:59:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:07,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536607880] [2020-12-23 06:59:07,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883885184] [2020-12-23 06:59:07,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:07,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:59:07,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:07,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:59:07,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:08,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:08,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:08,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-23 06:59:08,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250833017] [2020-12-23 06:59:08,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 06:59:08,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:08,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 06:59:08,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:59:08,071 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 68 states. [2020-12-23 06:59:08,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:08,367 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-12-23 06:59:08,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 06:59:08,368 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 134 [2020-12-23 06:59:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:08,368 INFO L225 Difference]: With dead ends: 142 [2020-12-23 06:59:08,368 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 06:59:08,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:59:08,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 06:59:08,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-12-23 06:59:08,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 06:59:08,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-12-23 06:59:08,373 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2020-12-23 06:59:08,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:08,373 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-12-23 06:59:08,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 06:59:08,373 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-12-23 06:59:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-23 06:59:08,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:08,374 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:08,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:08,589 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:08,590 INFO L82 PathProgramCache]: Analyzing trace with hash -2067388497, now seen corresponding path program 65 times [2020-12-23 06:59:08,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:08,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289066366] [2020-12-23 06:59:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:11,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:11,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289066366] [2020-12-23 06:59:11,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559688825] [2020-12-23 06:59:11,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:11,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-23 06:59:11,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:11,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:59:11,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:11,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:11,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:11,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-23 06:59:11,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376151887] [2020-12-23 06:59:11,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 06:59:11,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:11,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 06:59:11,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:59:11,811 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 69 states. [2020-12-23 06:59:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:12,076 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2020-12-23 06:59:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 06:59:12,077 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 136 [2020-12-23 06:59:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:12,077 INFO L225 Difference]: With dead ends: 144 [2020-12-23 06:59:12,078 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 06:59:12,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:59:12,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 06:59:12,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-12-23 06:59:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 06:59:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-12-23 06:59:12,080 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2020-12-23 06:59:12,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:12,081 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-12-23 06:59:12,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 06:59:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-12-23 06:59:12,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 06:59:12,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:12,081 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:12,282 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 06:59:12,282 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:12,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:12,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1862744753, now seen corresponding path program 66 times [2020-12-23 06:59:12,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:12,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148823271] [2020-12-23 06:59:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:15,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148823271] [2020-12-23 06:59:15,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450898396] [2020-12-23 06:59:15,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:15,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-23 06:59:15,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:15,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 06:59:15,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:15,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:15,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:15,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-23 06:59:15,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490054601] [2020-12-23 06:59:15,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 06:59:15,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:15,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 06:59:15,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:59:15,534 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 70 states. [2020-12-23 06:59:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:15,828 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-12-23 06:59:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 06:59:15,829 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 138 [2020-12-23 06:59:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:15,830 INFO L225 Difference]: With dead ends: 146 [2020-12-23 06:59:15,830 INFO L226 Difference]: Without dead ends: 142 [2020-12-23 06:59:15,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:59:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-23 06:59:15,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-12-23 06:59:15,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-12-23 06:59:15,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-12-23 06:59:15,834 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2020-12-23 06:59:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:15,835 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-12-23 06:59:15,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 06:59:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-12-23 06:59:15,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-23 06:59:15,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:15,836 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:16,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 06:59:16,039 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:16,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:16,039 INFO L82 PathProgramCache]: Analyzing trace with hash -850422477, now seen corresponding path program 67 times [2020-12-23 06:59:16,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:16,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810565282] [2020-12-23 06:59:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:19,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:19,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810565282] [2020-12-23 06:59:19,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726316561] [2020-12-23 06:59:19,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:19,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:59:19,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:19,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:19,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-23 06:59:19,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442116538] [2020-12-23 06:59:19,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 06:59:19,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:19,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 06:59:19,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:59:19,338 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 71 states. [2020-12-23 06:59:19,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:19,643 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2020-12-23 06:59:19,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 06:59:19,643 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 140 [2020-12-23 06:59:19,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:19,644 INFO L225 Difference]: With dead ends: 148 [2020-12-23 06:59:19,644 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 06:59:19,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:59:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 06:59:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-12-23 06:59:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-12-23 06:59:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-12-23 06:59:19,647 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2020-12-23 06:59:19,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:19,648 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-12-23 06:59:19,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 06:59:19,648 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-12-23 06:59:19,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-23 06:59:19,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:19,649 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:19,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:19,849 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:19,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:19,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1158981835, now seen corresponding path program 68 times [2020-12-23 06:59:19,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:19,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990846028] [2020-12-23 06:59:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:23,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990846028] [2020-12-23 06:59:23,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914388277] [2020-12-23 06:59:23,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:23,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:59:23,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:23,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:59:23,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:23,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:23,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 06:59:23,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46311858] [2020-12-23 06:59:23,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 06:59:23,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:23,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 06:59:23,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:59:23,275 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 72 states. [2020-12-23 06:59:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:23,608 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-12-23 06:59:23,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 06:59:23,609 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 142 [2020-12-23 06:59:23,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:23,610 INFO L225 Difference]: With dead ends: 150 [2020-12-23 06:59:23,610 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 06:59:23,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:59:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 06:59:23,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-12-23 06:59:23,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 06:59:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2020-12-23 06:59:23,615 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2020-12-23 06:59:23,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:23,615 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2020-12-23 06:59:23,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 06:59:23,615 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2020-12-23 06:59:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-23 06:59:23,616 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:23,616 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:23,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 06:59:23,817 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:23,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:23,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1331781449, now seen corresponding path program 69 times [2020-12-23 06:59:23,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:23,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521091986] [2020-12-23 06:59:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:23,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:27,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:27,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521091986] [2020-12-23 06:59:27,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471074414] [2020-12-23 06:59:27,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:27,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-12-23 06:59:27,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 06:59:27,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:27,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:27,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-23 06:59:27,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099705333] [2020-12-23 06:59:27,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 06:59:27,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:27,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 06:59:27,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:59:27,401 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 73 states. [2020-12-23 06:59:27,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:27,802 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2020-12-23 06:59:27,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 06:59:27,803 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 144 [2020-12-23 06:59:27,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:27,803 INFO L225 Difference]: With dead ends: 152 [2020-12-23 06:59:27,804 INFO L226 Difference]: Without dead ends: 148 [2020-12-23 06:59:27,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:59:27,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-23 06:59:27,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-12-23 06:59:27,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 06:59:27,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-12-23 06:59:27,809 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2020-12-23 06:59:27,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:27,809 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-12-23 06:59:27,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 06:59:27,809 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-12-23 06:59:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 06:59:27,810 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:27,810 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:28,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 06:59:28,024 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:28,024 INFO L82 PathProgramCache]: Analyzing trace with hash 111514041, now seen corresponding path program 70 times [2020-12-23 06:59:28,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:28,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273166225] [2020-12-23 06:59:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:31,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273166225] [2020-12-23 06:59:31,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487713527] [2020-12-23 06:59:31,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:31,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:59:31,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:31,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 06:59:31,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:31,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:31,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-23 06:59:31,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039911311] [2020-12-23 06:59:31,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 06:59:31,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:31,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 06:59:31,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:59:31,700 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 74 states. [2020-12-23 06:59:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:32,004 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2020-12-23 06:59:32,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 06:59:32,005 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 146 [2020-12-23 06:59:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:32,006 INFO L225 Difference]: With dead ends: 154 [2020-12-23 06:59:32,006 INFO L226 Difference]: Without dead ends: 150 [2020-12-23 06:59:32,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:59:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-12-23 06:59:32,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-12-23 06:59:32,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-12-23 06:59:32,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-12-23 06:59:32,013 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2020-12-23 06:59:32,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:32,013 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-12-23 06:59:32,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 06:59:32,014 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-12-23 06:59:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-23 06:59:32,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:32,015 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:32,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-23 06:59:32,229 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:32,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:32,229 INFO L82 PathProgramCache]: Analyzing trace with hash -155956677, now seen corresponding path program 71 times [2020-12-23 06:59:32,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:32,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191487452] [2020-12-23 06:59:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:35,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191487452] [2020-12-23 06:59:35,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390081322] [2020-12-23 06:59:35,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:35,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-23 06:59:35,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:35,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 06:59:35,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:36,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:36,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:36,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-23 06:59:36,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948067557] [2020-12-23 06:59:36,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 06:59:36,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:36,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 06:59:36,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:59:36,074 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 75 states. [2020-12-23 06:59:36,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:36,508 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-12-23 06:59:36,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 06:59:36,508 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 148 [2020-12-23 06:59:36,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:36,509 INFO L225 Difference]: With dead ends: 156 [2020-12-23 06:59:36,509 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 06:59:36,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:59:36,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 06:59:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-12-23 06:59:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-23 06:59:36,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-12-23 06:59:36,514 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2020-12-23 06:59:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:36,514 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-12-23 06:59:36,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 06:59:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-12-23 06:59:36,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-23 06:59:36,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:36,515 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:36,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:36,729 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:36,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:36,729 INFO L82 PathProgramCache]: Analyzing trace with hash 502721085, now seen corresponding path program 72 times [2020-12-23 06:59:36,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:36,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196279781] [2020-12-23 06:59:36,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:40,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196279781] [2020-12-23 06:59:40,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868798092] [2020-12-23 06:59:40,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:40,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-12-23 06:59:40,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:40,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 06:59:40,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:40,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:40,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-23 06:59:40,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898968191] [2020-12-23 06:59:40,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 06:59:40,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:40,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 06:59:40,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:59:40,585 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 76 states. [2020-12-23 06:59:40,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:40,884 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-12-23 06:59:40,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 06:59:40,885 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 150 [2020-12-23 06:59:40,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:40,887 INFO L225 Difference]: With dead ends: 158 [2020-12-23 06:59:40,887 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 06:59:40,888 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:59:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 06:59:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-12-23 06:59:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 06:59:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-12-23 06:59:40,892 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2020-12-23 06:59:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:40,892 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-12-23 06:59:40,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 06:59:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-12-23 06:59:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-23 06:59:40,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:40,893 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:41,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:41,108 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:41,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:41,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2131857855, now seen corresponding path program 73 times [2020-12-23 06:59:41,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:41,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447726867] [2020-12-23 06:59:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:44,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:44,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447726867] [2020-12-23 06:59:44,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816429120] [2020-12-23 06:59:44,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:44,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:59:44,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:45,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:45,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-23 06:59:45,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315242222] [2020-12-23 06:59:45,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-23 06:59:45,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:45,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-23 06:59:45,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:59:45,108 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 77 states. [2020-12-23 06:59:45,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:45,518 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2020-12-23 06:59:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-23 06:59:45,518 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 152 [2020-12-23 06:59:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:45,519 INFO L225 Difference]: With dead ends: 160 [2020-12-23 06:59:45,519 INFO L226 Difference]: Without dead ends: 156 [2020-12-23 06:59:45,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:59:45,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-12-23 06:59:45,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-12-23 06:59:45,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 06:59:45,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-12-23 06:59:45,524 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2020-12-23 06:59:45,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:45,524 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-12-23 06:59:45,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-23 06:59:45,524 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-12-23 06:59:45,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 06:59:45,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:45,525 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:45,739 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:45,740 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:45,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:45,740 INFO L82 PathProgramCache]: Analyzing trace with hash 69230785, now seen corresponding path program 74 times [2020-12-23 06:59:45,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:45,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560861194] [2020-12-23 06:59:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:49,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:49,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560861194] [2020-12-23 06:59:49,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990055263] [2020-12-23 06:59:49,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:49,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:59:49,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:49,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 06:59:49,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:49,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:49,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 06:59:49,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953846003] [2020-12-23 06:59:49,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 06:59:49,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:49,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 06:59:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:59:49,842 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 78 states. [2020-12-23 06:59:50,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:50,268 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2020-12-23 06:59:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 06:59:50,269 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 154 [2020-12-23 06:59:50,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:50,270 INFO L225 Difference]: With dead ends: 162 [2020-12-23 06:59:50,270 INFO L226 Difference]: Without dead ends: 158 [2020-12-23 06:59:50,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:59:50,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-12-23 06:59:50,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-12-23 06:59:50,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 06:59:50,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-12-23 06:59:50,274 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2020-12-23 06:59:50,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:50,274 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-12-23 06:59:50,274 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 06:59:50,274 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-12-23 06:59:50,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-23 06:59:50,275 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:50,275 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:50,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-23 06:59:50,476 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:50,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:50,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2135460029, now seen corresponding path program 75 times [2020-12-23 06:59:50,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:50,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900602490] [2020-12-23 06:59:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:54,377 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:54,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900602490] [2020-12-23 06:59:54,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035505502] [2020-12-23 06:59:54,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:54,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-12-23 06:59:54,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:54,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 06:59:54,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:54,698 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:54,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:54,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-23 06:59:54,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095594239] [2020-12-23 06:59:54,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 06:59:54,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:54,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 06:59:54,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:59:54,700 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 79 states. [2020-12-23 06:59:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:59:55,097 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2020-12-23 06:59:55,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 06:59:55,098 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 156 [2020-12-23 06:59:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:59:55,099 INFO L225 Difference]: With dead ends: 164 [2020-12-23 06:59:55,099 INFO L226 Difference]: Without dead ends: 160 [2020-12-23 06:59:55,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:59:55,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-23 06:59:55,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-12-23 06:59:55,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 06:59:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2020-12-23 06:59:55,104 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2020-12-23 06:59:55,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:59:55,104 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2020-12-23 06:59:55,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 06:59:55,104 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2020-12-23 06:59:55,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-23 06:59:55,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:59:55,105 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1] [2020-12-23 06:59:55,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:59:55,319 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:59:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:59:55,319 INFO L82 PathProgramCache]: Analyzing trace with hash 870511941, now seen corresponding path program 76 times [2020-12-23 06:59:55,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:59:55,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575643085] [2020-12-23 06:59:55,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:59:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:59:59,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:59,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575643085] [2020-12-23 06:59:59,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754190374] [2020-12-23 06:59:59,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:59:59,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:59:59,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:59:59,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:59:59,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:59:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:59:59,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:59:59,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-23 06:59:59,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68708769] [2020-12-23 06:59:59,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 06:59:59,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:59:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 06:59:59,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:59:59,735 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 80 states. [2020-12-23 07:00:00,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:00,127 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-12-23 07:00:00,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-23 07:00:00,133 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 158 [2020-12-23 07:00:00,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:00,134 INFO L225 Difference]: With dead ends: 166 [2020-12-23 07:00:00,134 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 07:00:00,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 07:00:00,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 07:00:00,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-12-23 07:00:00,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-23 07:00:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-12-23 07:00:00,138 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2020-12-23 07:00:00,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:00,139 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-12-23 07:00:00,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 07:00:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-12-23 07:00:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-12-23 07:00:00,140 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:00,140 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:00,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:00,356 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:00,356 INFO L82 PathProgramCache]: Analyzing trace with hash -903415097, now seen corresponding path program 77 times [2020-12-23 07:00:00,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:00,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809654518] [2020-12-23 07:00:00,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:00,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:04,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:04,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809654518] [2020-12-23 07:00:04,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186863087] [2020-12-23 07:00:04,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:00:04,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2020-12-23 07:00:04,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:04,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-23 07:00:04,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:04,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:04,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2020-12-23 07:00:04,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530104422] [2020-12-23 07:00:04,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-12-23 07:00:04,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:04,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-12-23 07:00:04,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:00:04,895 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 81 states. [2020-12-23 07:00:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:05,338 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2020-12-23 07:00:05,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-23 07:00:05,338 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 160 [2020-12-23 07:00:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:05,339 INFO L225 Difference]: With dead ends: 168 [2020-12-23 07:00:05,339 INFO L226 Difference]: Without dead ends: 164 [2020-12-23 07:00:05,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-12-23 07:00:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-23 07:00:05,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-12-23 07:00:05,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 07:00:05,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-12-23 07:00:05,343 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2020-12-23 07:00:05,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:05,343 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-12-23 07:00:05,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-12-23 07:00:05,344 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-12-23 07:00:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-23 07:00:05,344 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:05,345 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:05,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 07:00:05,560 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:05,560 INFO L82 PathProgramCache]: Analyzing trace with hash -545282103, now seen corresponding path program 78 times [2020-12-23 07:00:05,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:05,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409766982] [2020-12-23 07:00:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:09,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409766982] [2020-12-23 07:00:09,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080837688] [2020-12-23 07:00:09,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:00:09,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2020-12-23 07:00:09,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:09,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-23 07:00:09,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:10,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:10,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2020-12-23 07:00:10,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325473751] [2020-12-23 07:00:10,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-12-23 07:00:10,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:10,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-12-23 07:00:10,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 07:00:10,186 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 82 states. [2020-12-23 07:00:10,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:10,678 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2020-12-23 07:00:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-12-23 07:00:10,679 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 162 [2020-12-23 07:00:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:10,680 INFO L225 Difference]: With dead ends: 170 [2020-12-23 07:00:10,680 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 07:00:10,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-12-23 07:00:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 07:00:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-12-23 07:00:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 07:00:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2020-12-23 07:00:10,684 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2020-12-23 07:00:10,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:10,684 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2020-12-23 07:00:10,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-12-23 07:00:10,684 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2020-12-23 07:00:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-12-23 07:00:10,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:10,685 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:10,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-23 07:00:10,901 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:10,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:10,901 INFO L82 PathProgramCache]: Analyzing trace with hash 23141451, now seen corresponding path program 79 times [2020-12-23 07:00:10,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:10,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231142299] [2020-12-23 07:00:10,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:15,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231142299] [2020-12-23 07:00:15,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071508177] [2020-12-23 07:00:15,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:00:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-23 07:00:15,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:15,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:15,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2020-12-23 07:00:15,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733758309] [2020-12-23 07:00:15,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-12-23 07:00:15,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:15,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-12-23 07:00:15,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 07:00:15,601 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 83 states. [2020-12-23 07:00:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:15,938 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2020-12-23 07:00:15,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-23 07:00:15,939 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 164 [2020-12-23 07:00:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:15,939 INFO L225 Difference]: With dead ends: 172 [2020-12-23 07:00:15,940 INFO L226 Difference]: Without dead ends: 168 [2020-12-23 07:00:15,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-12-23 07:00:15,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-23 07:00:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-12-23 07:00:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 07:00:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-12-23 07:00:15,945 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2020-12-23 07:00:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:15,945 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-12-23 07:00:15,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-12-23 07:00:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-12-23 07:00:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-23 07:00:15,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:15,946 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:16,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:16,147 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash 817330253, now seen corresponding path program 80 times [2020-12-23 07:00:16,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:16,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412923913] [2020-12-23 07:00:16,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:16,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:21,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412923913] [2020-12-23 07:00:21,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467571778] [2020-12-23 07:00:21,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:00:21,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:00:21,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:21,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 82 conjunts are in the unsatisfiable core [2020-12-23 07:00:21,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:21,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:21,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2020-12-23 07:00:21,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261967587] [2020-12-23 07:00:21,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-12-23 07:00:21,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:21,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-12-23 07:00:21,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 07:00:21,370 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 84 states. [2020-12-23 07:00:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:21,817 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2020-12-23 07:00:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-12-23 07:00:21,818 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 166 [2020-12-23 07:00:21,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:21,819 INFO L225 Difference]: With dead ends: 174 [2020-12-23 07:00:21,819 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 07:00:21,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-12-23 07:00:21,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 07:00:21,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-12-23 07:00:21,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-23 07:00:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2020-12-23 07:00:21,823 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2020-12-23 07:00:21,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:21,823 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2020-12-23 07:00:21,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-12-23 07:00:21,823 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2020-12-23 07:00:21,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-12-23 07:00:21,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:21,824 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:22,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:22,025 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:22,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:22,025 INFO L82 PathProgramCache]: Analyzing trace with hash -471409713, now seen corresponding path program 81 times [2020-12-23 07:00:22,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:22,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909804864] [2020-12-23 07:00:22,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:22,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:27,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:27,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909804864] [2020-12-23 07:00:27,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171324393] [2020-12-23 07:00:27,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:00:27,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2020-12-23 07:00:27,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:27,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-23 07:00:27,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:27,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:27,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2020-12-23 07:00:27,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19595719] [2020-12-23 07:00:27,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-12-23 07:00:27,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:27,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-12-23 07:00:27,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 07:00:27,442 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 85 states. [2020-12-23 07:00:27,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:27,957 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2020-12-23 07:00:27,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-23 07:00:27,958 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 168 [2020-12-23 07:00:27,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:27,959 INFO L225 Difference]: With dead ends: 176 [2020-12-23 07:00:27,959 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 07:00:27,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-12-23 07:00:27,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 07:00:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-12-23 07:00:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-23 07:00:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-12-23 07:00:27,963 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2020-12-23 07:00:27,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:27,963 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-12-23 07:00:27,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-12-23 07:00:27,963 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-12-23 07:00:27,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-23 07:00:27,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:27,964 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:28,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:28,165 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:28,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:28,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1999935791, now seen corresponding path program 82 times [2020-12-23 07:00:28,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:28,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217379963] [2020-12-23 07:00:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:33,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217379963] [2020-12-23 07:00:33,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101674687] [2020-12-23 07:00:33,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:00:33,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:00:33,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:33,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 84 conjunts are in the unsatisfiable core [2020-12-23 07:00:33,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:33,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:33,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:33,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2020-12-23 07:00:33,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382832089] [2020-12-23 07:00:33,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-12-23 07:00:33,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:33,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-12-23 07:00:33,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 07:00:33,721 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 86 states. [2020-12-23 07:00:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:34,230 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2020-12-23 07:00:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-23 07:00:34,231 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 170 [2020-12-23 07:00:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:34,232 INFO L225 Difference]: With dead ends: 178 [2020-12-23 07:00:34,232 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 07:00:34,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-12-23 07:00:34,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 07:00:34,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-12-23 07:00:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 07:00:34,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-12-23 07:00:34,237 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2020-12-23 07:00:34,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:34,237 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-12-23 07:00:34,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-12-23 07:00:34,237 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-12-23 07:00:34,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-12-23 07:00:34,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:34,238 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:34,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:34,454 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:34,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:34,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2034681517, now seen corresponding path program 83 times [2020-12-23 07:00:34,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:34,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735724442] [2020-12-23 07:00:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:39,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735724442] [2020-12-23 07:00:39,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492257412] [2020-12-23 07:00:39,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:00:39,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2020-12-23 07:00:39,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:39,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-23 07:00:39,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:40,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:40,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2020-12-23 07:00:40,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113014577] [2020-12-23 07:00:40,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-12-23 07:00:40,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:40,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-12-23 07:00:40,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 07:00:40,127 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 87 states. [2020-12-23 07:00:40,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:40,563 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2020-12-23 07:00:40,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-23 07:00:40,564 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 172 [2020-12-23 07:00:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:40,565 INFO L225 Difference]: With dead ends: 180 [2020-12-23 07:00:40,565 INFO L226 Difference]: Without dead ends: 176 [2020-12-23 07:00:40,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-12-23 07:00:40,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-12-23 07:00:40,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-12-23 07:00:40,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 07:00:40,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2020-12-23 07:00:40,570 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2020-12-23 07:00:40,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:40,570 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2020-12-23 07:00:40,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-12-23 07:00:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2020-12-23 07:00:40,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-23 07:00:40,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:40,571 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:40,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:40,786 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:40,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1065585835, now seen corresponding path program 84 times [2020-12-23 07:00:40,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:40,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622239569] [2020-12-23 07:00:40,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:46,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622239569] [2020-12-23 07:00:46,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823011371] [2020-12-23 07:00:46,224 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:00:46,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2020-12-23 07:00:46,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:46,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 86 conjunts are in the unsatisfiable core [2020-12-23 07:00:46,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:46,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:46,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2020-12-23 07:00:46,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575650856] [2020-12-23 07:00:46,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-12-23 07:00:46,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:46,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-12-23 07:00:46,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 07:00:46,664 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 88 states. [2020-12-23 07:00:47,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:47,350 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2020-12-23 07:00:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-12-23 07:00:47,350 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 174 [2020-12-23 07:00:47,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:47,351 INFO L225 Difference]: With dead ends: 182 [2020-12-23 07:00:47,351 INFO L226 Difference]: Without dead ends: 178 [2020-12-23 07:00:47,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-12-23 07:00:47,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-23 07:00:47,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-12-23 07:00:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 07:00:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-12-23 07:00:47,355 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2020-12-23 07:00:47,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:47,356 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-12-23 07:00:47,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-12-23 07:00:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-12-23 07:00:47,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-23 07:00:47,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:47,357 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:47,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-12-23 07:00:47,559 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:47,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:47,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1772538665, now seen corresponding path program 85 times [2020-12-23 07:00:47,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:47,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577143091] [2020-12-23 07:00:47,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:53,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577143091] [2020-12-23 07:00:53,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737639853] [2020-12-23 07:00:53,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:00:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:53,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-23 07:00:53,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:00:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:53,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:00:53,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2020-12-23 07:00:53,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695322] [2020-12-23 07:00:53,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-12-23 07:00:53,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:00:53,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-12-23 07:00:53,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 07:00:53,389 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 89 states. [2020-12-23 07:00:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:00:53,938 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2020-12-23 07:00:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-23 07:00:53,939 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 176 [2020-12-23 07:00:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:00:53,940 INFO L225 Difference]: With dead ends: 184 [2020-12-23 07:00:53,940 INFO L226 Difference]: Without dead ends: 180 [2020-12-23 07:00:53,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-12-23 07:00:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-12-23 07:00:53,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-12-23 07:00:53,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 07:00:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2020-12-23 07:00:53,943 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2020-12-23 07:00:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:00:53,944 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2020-12-23 07:00:53,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-12-23 07:00:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2020-12-23 07:00:53,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-23 07:00:53,945 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:00:53,945 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1] [2020-12-23 07:00:54,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:00:54,146 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:00:54,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:00:54,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1745591769, now seen corresponding path program 86 times [2020-12-23 07:00:54,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:00:54,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022660457] [2020-12-23 07:00:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:00:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:00:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:00:59,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022660457] [2020-12-23 07:00:59,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936524343] [2020-12-23 07:00:59,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:00:59,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 07:00:59,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:00:59,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 88 conjunts are in the unsatisfiable core [2020-12-23 07:00:59,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:00,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:00,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2020-12-23 07:01:00,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807318472] [2020-12-23 07:01:00,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-12-23 07:01:00,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:00,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-12-23 07:01:00,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 07:01:00,047 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 90 states. [2020-12-23 07:01:00,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:00,668 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2020-12-23 07:01:00,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-12-23 07:01:00,668 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 178 [2020-12-23 07:01:00,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:00,669 INFO L225 Difference]: With dead ends: 186 [2020-12-23 07:01:00,669 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 07:01:00,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-12-23 07:01:00,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 07:01:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-12-23 07:01:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 07:01:00,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-12-23 07:01:00,673 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2020-12-23 07:01:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:00,673 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-12-23 07:01:00,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-12-23 07:01:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-12-23 07:01:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-12-23 07:01:00,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:00,674 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:00,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-12-23 07:01:00,875 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:00,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:00,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1765290405, now seen corresponding path program 87 times [2020-12-23 07:01:00,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:00,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651555931] [2020-12-23 07:01:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:00,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:06,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651555931] [2020-12-23 07:01:06,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127046227] [2020-12-23 07:01:06,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:01:06,809 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2020-12-23 07:01:06,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:06,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-23 07:01:06,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:07,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:07,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2020-12-23 07:01:07,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373278164] [2020-12-23 07:01:07,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-12-23 07:01:07,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:07,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-12-23 07:01:07,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 07:01:07,055 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 91 states. [2020-12-23 07:01:07,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:07,626 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2020-12-23 07:01:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-12-23 07:01:07,627 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 180 [2020-12-23 07:01:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:07,628 INFO L225 Difference]: With dead ends: 188 [2020-12-23 07:01:07,628 INFO L226 Difference]: Without dead ends: 184 [2020-12-23 07:01:07,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-12-23 07:01:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-12-23 07:01:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-12-23 07:01:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-23 07:01:07,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-12-23 07:01:07,631 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2020-12-23 07:01:07,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:07,631 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-12-23 07:01:07,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-12-23 07:01:07,631 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-12-23 07:01:07,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-12-23 07:01:07,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:07,632 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:07,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-12-23 07:01:07,833 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:07,834 INFO L82 PathProgramCache]: Analyzing trace with hash 121235037, now seen corresponding path program 88 times [2020-12-23 07:01:07,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:07,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382356181] [2020-12-23 07:01:07,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:13,587 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:13,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382356181] [2020-12-23 07:01:13,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026612227] [2020-12-23 07:01:13,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:01:13,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 07:01:13,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:13,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 90 conjunts are in the unsatisfiable core [2020-12-23 07:01:13,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:14,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:14,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:14,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2020-12-23 07:01:14,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789748412] [2020-12-23 07:01:14,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-12-23 07:01:14,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:14,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-12-23 07:01:14,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 07:01:14,017 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 92 states. [2020-12-23 07:01:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:14,453 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2020-12-23 07:01:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-12-23 07:01:14,454 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 182 [2020-12-23 07:01:14,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:14,456 INFO L225 Difference]: With dead ends: 190 [2020-12-23 07:01:14,456 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 07:01:14,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-12-23 07:01:14,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 07:01:14,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2020-12-23 07:01:14,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 07:01:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2020-12-23 07:01:14,460 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2020-12-23 07:01:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:14,460 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2020-12-23 07:01:14,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-12-23 07:01:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2020-12-23 07:01:14,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-12-23 07:01:14,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:14,461 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:14,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:14,677 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:14,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:14,677 INFO L82 PathProgramCache]: Analyzing trace with hash 595985887, now seen corresponding path program 89 times [2020-12-23 07:01:14,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:14,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387405753] [2020-12-23 07:01:14,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:20,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:20,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387405753] [2020-12-23 07:01:20,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605035605] [2020-12-23 07:01:20,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:20,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2020-12-23 07:01:20,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-23 07:01:20,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:20,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:20,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2020-12-23 07:01:20,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15303922] [2020-12-23 07:01:20,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-12-23 07:01:20,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:20,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-12-23 07:01:20,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 07:01:20,934 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 93 states. [2020-12-23 07:01:21,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:21,450 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2020-12-23 07:01:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-23 07:01:21,451 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 184 [2020-12-23 07:01:21,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:21,452 INFO L225 Difference]: With dead ends: 192 [2020-12-23 07:01:21,452 INFO L226 Difference]: Without dead ends: 188 [2020-12-23 07:01:21,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-12-23 07:01:21,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-12-23 07:01:21,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-12-23 07:01:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 07:01:21,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-12-23 07:01:21,457 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2020-12-23 07:01:21,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:21,457 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-12-23 07:01:21,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-12-23 07:01:21,457 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-12-23 07:01:21,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-23 07:01:21,458 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:21,458 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:21,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:21,672 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:21,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:21,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1565019361, now seen corresponding path program 90 times [2020-12-23 07:01:21,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:21,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369509807] [2020-12-23 07:01:21,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 07:01:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:27,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369509807] [2020-12-23 07:01:27,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893516483] [2020-12-23 07:01:27,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 07:01:27,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2020-12-23 07:01:27,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 07:01:27,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 92 conjunts are in the unsatisfiable core [2020-12-23 07:01:27,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 07:01:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 07:01:28,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 07:01:28,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2020-12-23 07:01:28,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905846379] [2020-12-23 07:01:28,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-12-23 07:01:28,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 07:01:28,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-12-23 07:01:28,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 07:01:28,233 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 94 states. [2020-12-23 07:01:28,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 07:01:28,834 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2020-12-23 07:01:28,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-12-23 07:01:28,835 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 186 [2020-12-23 07:01:28,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 07:01:28,836 INFO L225 Difference]: With dead ends: 194 [2020-12-23 07:01:28,836 INFO L226 Difference]: Without dead ends: 190 [2020-12-23 07:01:28,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-12-23 07:01:28,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-23 07:01:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2020-12-23 07:01:28,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 07:01:28,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2020-12-23 07:01:28,839 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2020-12-23 07:01:28,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 07:01:28,839 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2020-12-23 07:01:28,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-12-23 07:01:28,839 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2020-12-23 07:01:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-12-23 07:01:28,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 07:01:28,840 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1] [2020-12-23 07:01:29,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 07:01:29,041 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 07:01:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 07:01:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash 798284643, now seen corresponding path program 91 times [2020-12-23 07:01:29,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 07:01:29,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127412349] [2020-12-23 07:01:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 07:01:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat