/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/array-examples/standard_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:33:59,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:33:59,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:33:59,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:33:59,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:33:59,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:33:59,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:33:59,792 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:33:59,852 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:33:59,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:33:59,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:33:59,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:33:59,856 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:33:59,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:33:59,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:33:59,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:33:59,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:33:59,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:33:59,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:33:59,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:33:59,857 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:33:59,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:33:59,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:33:59,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:33:59,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:33:59,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:33:59,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:33:59,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:33:59,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:33:59,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:33:59,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:33:59,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:33:59,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:33:59,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:34:00,271 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:34:00,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:34:00,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:34:00,305 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:34:00,306 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:34:00,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init6_ground-2.i [2020-12-21 21:34:00,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccdb5c009/47e6259bb4a148618b914dceae10aa43/FLAG14069737d [2020-12-21 21:34:01,106 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:34:01,107 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init6_ground-2.i [2020-12-21 21:34:01,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccdb5c009/47e6259bb4a148618b914dceae10aa43/FLAG14069737d [2020-12-21 21:34:01,427 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccdb5c009/47e6259bb4a148618b914dceae10aa43 [2020-12-21 21:34:01,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:34:01,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:34:01,434 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:34:01,434 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:34:01,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:34:01,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:34:01" (1/1) ... [2020-12-21 21:34:01,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d0881dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01, skipping insertion in model container [2020-12-21 21:34:01,441 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:34:01" (1/1) ... [2020-12-21 21:34:01,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:34:01,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:34:01,625 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init6_ground-2.i[816,829] [2020-12-21 21:34:01,645 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:34:01,655 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:34:01,670 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init6_ground-2.i[816,829] [2020-12-21 21:34:01,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:34:01,699 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:34:01,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01 WrapperNode [2020-12-21 21:34:01,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:34:01,701 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:34:01,701 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:34:01,701 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:34:01,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01" (1/1) ... [2020-12-21 21:34:01,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01" (1/1) ... [2020-12-21 21:34:01,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:34:01,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:34:01,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:34:01,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:34:01,750 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01" (1/1) ... [2020-12-21 21:34:01,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01" (1/1) ... [2020-12-21 21:34:01,752 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01" (1/1) ... [2020-12-21 21:34:01,753 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01" (1/1) ... [2020-12-21 21:34:01,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01" (1/1) ... [2020-12-21 21:34:01,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01" (1/1) ... [2020-12-21 21:34:01,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01" (1/1) ... [2020-12-21 21:34:01,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:34:01,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:34:01,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:34:01,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:34:01,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:34:01,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:34:01,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:34:01,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:34:01,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:34:01,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:34:01,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:34:01,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-21 21:34:02,171 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:34:02,172 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-21 21:34:02,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:34:02 BoogieIcfgContainer [2020-12-21 21:34:02,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:34:02,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:34:02,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:34:02,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:34:02,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:34:01" (1/3) ... [2020-12-21 21:34:02,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fd6cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:34:02, skipping insertion in model container [2020-12-21 21:34:02,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:34:01" (2/3) ... [2020-12-21 21:34:02,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fd6cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:34:02, skipping insertion in model container [2020-12-21 21:34:02,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:34:02" (3/3) ... [2020-12-21 21:34:02,185 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2020-12-21 21:34:02,201 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:34:02,211 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:34:02,259 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:34:02,292 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:34:02,292 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:34:02,292 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:34:02,292 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:34:02,293 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:34:02,293 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:34:02,293 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:34:02,293 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:34:02,311 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-21 21:34:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-21 21:34:02,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:02,322 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:02,323 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:02,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:02,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1501159767, now seen corresponding path program 1 times [2020-12-21 21:34:02,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:02,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743428940] [2020-12-21 21:34:02,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:02,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:34:02,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743428940] [2020-12-21 21:34:02,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:34:02,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:34:02,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048639045] [2020-12-21 21:34:02,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:34:02,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:02,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:34:02,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:34:02,568 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-12-21 21:34:02,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:02,687 INFO L93 Difference]: Finished difference Result 51 states and 89 transitions. [2020-12-21 21:34:02,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:34:02,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-21 21:34:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:02,700 INFO L225 Difference]: With dead ends: 51 [2020-12-21 21:34:02,700 INFO L226 Difference]: Without dead ends: 26 [2020-12-21 21:34:02,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:34:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-21 21:34:02,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-21 21:34:02,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-21 21:34:02,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-21 21:34:02,747 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 17 [2020-12-21 21:34:02,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:02,747 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-21 21:34:02,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:34:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-21 21:34:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-21 21:34:02,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:02,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:02,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:34:02,750 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:02,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:02,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1833326096, now seen corresponding path program 1 times [2020-12-21 21:34:02,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:02,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144728627] [2020-12-21 21:34:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:34:02,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144728627] [2020-12-21 21:34:02,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494885578] [2020-12-21 21:34:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:02,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:34:02,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:34:03,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:03,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:34:03,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894605732] [2020-12-21 21:34:03,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:34:03,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:03,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:34:03,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:34:03,101 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 5 states. [2020-12-21 21:34:03,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:03,175 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2020-12-21 21:34:03,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:34:03,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-21 21:34:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:03,177 INFO L225 Difference]: With dead ends: 54 [2020-12-21 21:34:03,177 INFO L226 Difference]: Without dead ends: 32 [2020-12-21 21:34:03,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:34:03,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-21 21:34:03,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-21 21:34:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-21 21:34:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-12-21 21:34:03,187 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2020-12-21 21:34:03,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:03,187 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-12-21 21:34:03,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:34:03,187 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-12-21 21:34:03,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-21 21:34:03,188 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:03,189 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:03,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-21 21:34:03,404 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:03,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:03,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1605379405, now seen corresponding path program 2 times [2020-12-21 21:34:03,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:03,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742788051] [2020-12-21 21:34:03,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:03,550 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-21 21:34:03,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742788051] [2020-12-21 21:34:03,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131449491] [2020-12-21 21:34:03,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:03,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:34:03,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:03,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:34:03,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-21 21:34:03,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:03,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-21 21:34:03,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397233383] [2020-12-21 21:34:03,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:34:03,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:03,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:34:03,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:34:03,666 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states. [2020-12-21 21:34:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:03,750 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-12-21 21:34:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:34:03,751 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-21 21:34:03,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:03,752 INFO L225 Difference]: With dead ends: 65 [2020-12-21 21:34:03,752 INFO L226 Difference]: Without dead ends: 38 [2020-12-21 21:34:03,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:34:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-21 21:34:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-21 21:34:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-21 21:34:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-12-21 21:34:03,762 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 29 [2020-12-21 21:34:03,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:03,762 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-12-21 21:34:03,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:34:03,762 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-12-21 21:34:03,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-12-21 21:34:03,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:03,764 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:03,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:03,979 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:03,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:03,981 INFO L82 PathProgramCache]: Analyzing trace with hash 777570992, now seen corresponding path program 3 times [2020-12-21 21:34:03,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:03,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024546525] [2020-12-21 21:34:03,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-21 21:34:04,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024546525] [2020-12-21 21:34:04,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714947087] [2020-12-21 21:34:04,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:04,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-21 21:34:04,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:04,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:34:04,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:04,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-21 21:34:04,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:04,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-21 21:34:04,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000329540] [2020-12-21 21:34:04,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:34:04,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:04,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:34:04,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:34:04,288 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-12-21 21:34:04,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:04,389 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2020-12-21 21:34:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:34:04,390 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-12-21 21:34:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:04,391 INFO L225 Difference]: With dead ends: 76 [2020-12-21 21:34:04,391 INFO L226 Difference]: Without dead ends: 44 [2020-12-21 21:34:04,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:34:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-21 21:34:04,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-21 21:34:04,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:34:04,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-12-21 21:34:04,402 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 35 [2020-12-21 21:34:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:04,403 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-12-21 21:34:04,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:34:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-12-21 21:34:04,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:34:04,405 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:04,405 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:04,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:04,619 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:04,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1875666669, now seen corresponding path program 4 times [2020-12-21 21:34:04,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:04,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065183860] [2020-12-21 21:34:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 21:34:04,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065183860] [2020-12-21 21:34:04,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491047618] [2020-12-21 21:34:04,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:04,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:34:04,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:04,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:34:04,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:04,832 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-21 21:34:04,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:04,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-21 21:34:04,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550709535] [2020-12-21 21:34:04,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:34:04,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:04,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:34:04,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:34:04,835 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 8 states. [2020-12-21 21:34:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:04,927 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2020-12-21 21:34:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:34:04,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-12-21 21:34:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:04,929 INFO L225 Difference]: With dead ends: 87 [2020-12-21 21:34:04,929 INFO L226 Difference]: Without dead ends: 50 [2020-12-21 21:34:04,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:34:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-21 21:34:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-21 21:34:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-21 21:34:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-12-21 21:34:04,939 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 41 [2020-12-21 21:34:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:04,939 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-12-21 21:34:04,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:34:04,940 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-12-21 21:34:04,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-21 21:34:04,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:04,941 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:05,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:05,155 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:05,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:05,156 INFO L82 PathProgramCache]: Analyzing trace with hash 742123344, now seen corresponding path program 5 times [2020-12-21 21:34:05,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:05,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312355490] [2020-12-21 21:34:05,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:05,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-21 21:34:05,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312355490] [2020-12-21 21:34:05,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621891416] [2020-12-21 21:34:05,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:34:06,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-21 21:34:06,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:06,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:34:06,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-12-21 21:34:06,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:06,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-21 21:34:06,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490128184] [2020-12-21 21:34:06,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:34:06,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:06,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:34:06,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:34:06,334 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 9 states. [2020-12-21 21:34:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:06,445 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2020-12-21 21:34:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:34:06,452 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-12-21 21:34:06,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:06,453 INFO L225 Difference]: With dead ends: 98 [2020-12-21 21:34:06,453 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:34:06,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:34:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:34:06,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-21 21:34:06,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-21 21:34:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-12-21 21:34:06,472 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2020-12-21 21:34:06,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:06,473 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-12-21 21:34:06,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:34:06,476 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-12-21 21:34:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-12-21 21:34:06,478 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:06,480 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:06,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-21 21:34:06,681 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:06,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:06,682 INFO L82 PathProgramCache]: Analyzing trace with hash 786050931, now seen corresponding path program 6 times [2020-12-21 21:34:06,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:06,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707563323] [2020-12-21 21:34:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-21 21:34:06,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707563323] [2020-12-21 21:34:06,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158954489] [2020-12-21 21:34:06,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:07,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-21 21:34:07,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:07,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:34:07,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-21 21:34:07,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:07,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-21 21:34:07,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867655793] [2020-12-21 21:34:07,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:34:07,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:07,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:34:07,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:34:07,435 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 10 states. [2020-12-21 21:34:07,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:07,545 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2020-12-21 21:34:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:34:07,546 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-12-21 21:34:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:07,547 INFO L225 Difference]: With dead ends: 109 [2020-12-21 21:34:07,547 INFO L226 Difference]: Without dead ends: 62 [2020-12-21 21:34:07,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:34:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-21 21:34:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-21 21:34:07,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-21 21:34:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2020-12-21 21:34:07,556 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 53 [2020-12-21 21:34:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:07,557 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2020-12-21 21:34:07,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:34:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2020-12-21 21:34:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-21 21:34:07,559 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:07,559 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:07,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:07,774 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:07,775 INFO L82 PathProgramCache]: Analyzing trace with hash 518106096, now seen corresponding path program 7 times [2020-12-21 21:34:07,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:07,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503650152] [2020-12-21 21:34:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-21 21:34:07,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503650152] [2020-12-21 21:34:07,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171723422] [2020-12-21 21:34:07,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:07,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:34:07,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-12-21 21:34:08,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:08,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-21 21:34:08,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510325620] [2020-12-21 21:34:08,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:34:08,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:08,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:34:08,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:34:08,043 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand 11 states. [2020-12-21 21:34:08,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:08,142 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2020-12-21 21:34:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:34:08,142 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-12-21 21:34:08,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:08,143 INFO L225 Difference]: With dead ends: 120 [2020-12-21 21:34:08,143 INFO L226 Difference]: Without dead ends: 68 [2020-12-21 21:34:08,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:34:08,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-21 21:34:08,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-12-21 21:34:08,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-21 21:34:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2020-12-21 21:34:08,152 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 59 [2020-12-21 21:34:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:08,153 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2020-12-21 21:34:08,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:34:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2020-12-21 21:34:08,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-21 21:34:08,154 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:08,154 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:08,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:08,370 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:08,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:08,371 INFO L82 PathProgramCache]: Analyzing trace with hash -820929069, now seen corresponding path program 8 times [2020-12-21 21:34:08,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:08,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414913927] [2020-12-21 21:34:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-21 21:34:08,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414913927] [2020-12-21 21:34:08,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831787798] [2020-12-21 21:34:08,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:34:08,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:34:08,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:08,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:34:08,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-12-21 21:34:08,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:08,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-21 21:34:08,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702630895] [2020-12-21 21:34:08,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-21 21:34:08,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:08,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-21 21:34:08,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:34:08,667 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand 12 states. [2020-12-21 21:34:08,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:08,802 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2020-12-21 21:34:08,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:34:08,802 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-12-21 21:34:08,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:08,803 INFO L225 Difference]: With dead ends: 131 [2020-12-21 21:34:08,803 INFO L226 Difference]: Without dead ends: 74 [2020-12-21 21:34:08,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-21 21:34:08,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-21 21:34:08,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-21 21:34:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-21 21:34:08,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-12-21 21:34:08,813 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 65 [2020-12-21 21:34:08,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:08,813 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-12-21 21:34:08,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-21 21:34:08,814 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-12-21 21:34:08,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-21 21:34:08,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:08,815 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:09,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-21 21:34:09,030 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:09,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:09,031 INFO L82 PathProgramCache]: Analyzing trace with hash 884742288, now seen corresponding path program 9 times [2020-12-21 21:34:09,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:09,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91790955] [2020-12-21 21:34:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 21:34:09,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91790955] [2020-12-21 21:34:09,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611462858] [2020-12-21 21:34:09,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:34:15,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-21 21:34:15,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:15,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-21 21:34:15,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-12-21 21:34:15,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:15,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-21 21:34:15,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808744747] [2020-12-21 21:34:15,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-21 21:34:15,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:15,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-21 21:34:15,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:34:15,837 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 13 states. [2020-12-21 21:34:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:15,960 INFO L93 Difference]: Finished difference Result 142 states and 159 transitions. [2020-12-21 21:34:15,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-21 21:34:15,961 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 71 [2020-12-21 21:34:15,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:15,965 INFO L225 Difference]: With dead ends: 142 [2020-12-21 21:34:15,967 INFO L226 Difference]: Without dead ends: 80 [2020-12-21 21:34:15,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-21 21:34:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-21 21:34:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-12-21 21:34:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-21 21:34:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2020-12-21 21:34:15,996 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 71 [2020-12-21 21:34:15,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:15,996 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2020-12-21 21:34:15,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-21 21:34:15,996 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2020-12-21 21:34:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-12-21 21:34:16,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:16,003 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:16,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:16,205 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:16,206 INFO L82 PathProgramCache]: Analyzing trace with hash 489153587, now seen corresponding path program 10 times [2020-12-21 21:34:16,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:16,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214509744] [2020-12-21 21:34:16,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-21 21:34:16,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214509744] [2020-12-21 21:34:16,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883378744] [2020-12-21 21:34:16,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:34:16,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:34:16,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:34:16,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-21 21:34:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:34:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-12-21 21:34:16,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:34:16,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-21 21:34:16,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270176157] [2020-12-21 21:34:16,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-21 21:34:16,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:34:16,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-21 21:34:16,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:34:16,609 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand 14 states. [2020-12-21 21:34:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:34:16,753 INFO L93 Difference]: Finished difference Result 153 states and 170 transitions. [2020-12-21 21:34:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-21 21:34:16,753 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-12-21 21:34:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:34:16,754 INFO L225 Difference]: With dead ends: 153 [2020-12-21 21:34:16,755 INFO L226 Difference]: Without dead ends: 86 [2020-12-21 21:34:16,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-21 21:34:16,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-21 21:34:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-12-21 21:34:16,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-21 21:34:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2020-12-21 21:34:16,771 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 77 [2020-12-21 21:34:16,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:34:16,771 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2020-12-21 21:34:16,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-21 21:34:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2020-12-21 21:34:16,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-21 21:34:16,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:34:16,773 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:34:16,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:34:16,989 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:34:16,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:34:16,990 INFO L82 PathProgramCache]: Analyzing trace with hash 851258672, now seen corresponding path program 11 times [2020-12-21 21:34:16,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:34:16,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521992839] [2020-12-21 21:34:16,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:34:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:34:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-12-21 21:34:17,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521992839] [2020-12-21 21:34:17,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577952285] [2020-12-21 21:34:17,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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