/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/nla-digbench-scaling/lcm1_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:31:44,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:31:44,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:31:44,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:31:44,771 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:31:44,772 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:31:44,773 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:31:44,775 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:31:44,803 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:31:44,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:31:44,805 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:31:44,805 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:31:44,806 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:31:44,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:31:44,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:31:44,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:31:44,806 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:31:44,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:31:44,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:31:44,807 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:31:44,807 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:31:44,807 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:31:44,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:31:44,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:31:44,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:31:44,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:31:44,808 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:31:44,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:31:44,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:31:44,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:31:44,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:31:44,809 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:31:44,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:31:44,810 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:31:45,198 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:31:45,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:31:45,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:31:45,236 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:31:45,239 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:31:45,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound100.c [2020-12-22 05:31:45,314 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91d8e2b95/69c9f750c67c4dceb0df144626cc63a3/FLAGd495e6101 [2020-12-22 05:31:45,960 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:31:45,962 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/lcm1_unwindbound100.c [2020-12-22 05:31:45,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91d8e2b95/69c9f750c67c4dceb0df144626cc63a3/FLAGd495e6101 [2020-12-22 05:31:46,297 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91d8e2b95/69c9f750c67c4dceb0df144626cc63a3 [2020-12-22 05:31:46,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:31:46,305 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:31:46,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:31:46,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:31:46,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:31:46,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:31:46" (1/1) ... [2020-12-22 05:31:46,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@db0a6bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46, skipping insertion in model container [2020-12-22 05:31:46,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:31:46" (1/1) ... [2020-12-22 05:31:46,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:31:46,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:31:46,498 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/nla-digbench-scaling/lcm1_unwindbound100.c[552,565] [2020-12-22 05:31:46,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:31:46,549 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:31:46,573 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/nla-digbench-scaling/lcm1_unwindbound100.c[552,565] [2020-12-22 05:31:46,601 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:31:46,633 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:31:46,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46 WrapperNode [2020-12-22 05:31:46,634 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:31:46,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:31:46,643 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:31:46,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:31:46,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46" (1/1) ... [2020-12-22 05:31:46,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46" (1/1) ... [2020-12-22 05:31:46,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:31:46,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:31:46,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:31:46,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:31:46,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46" (1/1) ... [2020-12-22 05:31:46,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46" (1/1) ... [2020-12-22 05:31:46,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46" (1/1) ... [2020-12-22 05:31:46,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46" (1/1) ... [2020-12-22 05:31:46,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46" (1/1) ... [2020-12-22 05:31:46,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46" (1/1) ... [2020-12-22 05:31:46,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46" (1/1) ... [2020-12-22 05:31:46,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:31:46,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:31:46,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:31:46,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:31:46,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46" (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 [2020-12-22 05:31:46,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:31:46,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:31:46,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:31:46,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:31:47,336 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:31:47,336 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-22 05:31:47,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:31:47 BoogieIcfgContainer [2020-12-22 05:31:47,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:31:47,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:31:47,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:31:47,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:31:47,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:31:46" (1/3) ... [2020-12-22 05:31:47,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3d3b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:31:47, skipping insertion in model container [2020-12-22 05:31:47,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:31:46" (2/3) ... [2020-12-22 05:31:47,346 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d3d3b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:31:47, skipping insertion in model container [2020-12-22 05:31:47,346 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:31:47" (3/3) ... [2020-12-22 05:31:47,347 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm1_unwindbound100.c [2020-12-22 05:31:47,354 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:31:47,358 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 05:31:47,377 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 05:31:47,404 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:31:47,404 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:31:47,405 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:31:47,405 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:31:47,405 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:31:47,405 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:31:47,405 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:31:47,405 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:31:47,421 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-22 05:31:47,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:31:47,427 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:31:47,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:31:47,428 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:31:47,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:31:47,435 INFO L82 PathProgramCache]: Analyzing trace with hash -172276425, now seen corresponding path program 1 times [2020-12-22 05:31:47,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:31:47,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66269971] [2020-12-22 05:31:47,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:31:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:31:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:31:47,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66269971] [2020-12-22 05:31:47,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:31:47,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:31:47,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355507771] [2020-12-22 05:31:47,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:31:47,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:31:47,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:31:47,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:31:47,643 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2020-12-22 05:31:47,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:31:47,667 INFO L93 Difference]: Finished difference Result 77 states and 110 transitions. [2020-12-22 05:31:47,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:31:47,669 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-12-22 05:31:47,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:31:47,679 INFO L225 Difference]: With dead ends: 77 [2020-12-22 05:31:47,679 INFO L226 Difference]: Without dead ends: 36 [2020-12-22 05:31:47,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:31:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-22 05:31:47,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-12-22 05:31:47,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-12-22 05:31:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-12-22 05:31:47,744 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 14 [2020-12-22 05:31:47,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:31:47,745 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-12-22 05:31:47,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:31:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-12-22 05:31:47,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 05:31:47,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:31:47,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:31:47,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:31:47,749 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:31:47,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:31:47,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1061593710, now seen corresponding path program 1 times [2020-12-22 05:31:47,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:31:47,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779713091] [2020-12-22 05:31:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:31:47,823 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:31:47,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796791626] [2020-12-22 05:31:47,824 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 [2020-12-22 05:31:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:31:47,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 05:31:47,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:31:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:31:48,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779713091] [2020-12-22 05:31:48,228 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:31:48,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796791626] [2020-12-22 05:31:48,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:31:48,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 05:31:48,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563909991] [2020-12-22 05:31:48,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:31:48,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:31:48,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:31:48,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:31:48,236 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 6 states. [2020-12-22 05:31:48,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:31:48,518 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-12-22 05:31:48,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:31:48,519 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-22 05:31:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:31:48,520 INFO L225 Difference]: With dead ends: 72 [2020-12-22 05:31:48,521 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 05:31:48,522 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:31:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 05:31:48,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2020-12-22 05:31:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 05:31:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-12-22 05:31:48,533 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 14 [2020-12-22 05:31:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:31:48,534 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-12-22 05:31:48,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:31:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-12-22 05:31:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:31:48,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:31:48,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:31:48,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:31:48,749 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:31:48,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:31:48,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1450344358, now seen corresponding path program 1 times [2020-12-22 05:31:48,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:31:48,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487454547] [2020-12-22 05:31:48,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:31:48,791 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:31:48,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625972346] [2020-12-22 05:31:48,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:31:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:31:48,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 05:31:48,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:31:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:31:48,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487454547] [2020-12-22 05:31:48,885 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:31:48,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625972346] [2020-12-22 05:31:48,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:31:48,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:31:48,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146673418] [2020-12-22 05:31:48,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:31:48,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:31:48,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:31:48,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:31:48,888 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 4 states. [2020-12-22 05:31:48,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:31:48,910 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2020-12-22 05:31:48,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:31:48,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-12-22 05:31:48,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:31:48,913 INFO L225 Difference]: With dead ends: 58 [2020-12-22 05:31:48,913 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 05:31:48,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:31:48,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 05:31:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 05:31:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 05:31:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2020-12-22 05:31:48,925 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 15 [2020-12-22 05:31:48,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:31:48,925 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2020-12-22 05:31:48,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:31:48,925 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2020-12-22 05:31:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:31:48,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:31:48,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:31:49,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:31:49,142 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:31:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:31:49,144 INFO L82 PathProgramCache]: Analyzing trace with hash -2089044929, now seen corresponding path program 1 times [2020-12-22 05:31:49,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:31:49,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115609561] [2020-12-22 05:31:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:31:49,170 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:31:49,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134704000] [2020-12-22 05:31:49,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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