/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loop-simple/nested_4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:49:35,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:49:35,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:49:35,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 04:49:35,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:49:35,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:49:35,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:49:35,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:49:35,840 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:49:35,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:49:35,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:49:35,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:49:35,847 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:49:35,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:49:35,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:49:35,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:49:35,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:49:35,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:49:35,850 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:49:35,850 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:49:35,850 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:49:35,851 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:49:35,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:49:35,851 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:49:35,851 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:49:35,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:49:35,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:49:35,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:49:35,852 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:49:35,853 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:49:35,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:49:35,853 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:49:35,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:49:35,854 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:49:36,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:49:36,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:49:36,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:49:36,319 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:49:36,320 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:49:36,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_4.c [2020-12-22 04:49:36,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9576e57d/7fc22dc76c1d4f34a3ccea52cec8471c/FLAGf0038981a [2020-12-22 04:49:37,193 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:49:37,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_4.c [2020-12-22 04:49:37,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9576e57d/7fc22dc76c1d4f34a3ccea52cec8471c/FLAGf0038981a [2020-12-22 04:49:37,564 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9576e57d/7fc22dc76c1d4f34a3ccea52cec8471c [2020-12-22 04:49:37,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:49:37,572 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:49:37,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:49:37,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:49:37,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:49:37,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:49:37" (1/1) ... [2020-12-22 04:49:37,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e38c9ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37, skipping insertion in model container [2020-12-22 04:49:37,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:49:37" (1/1) ... [2020-12-22 04:49:37,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:49:37,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:49:37,817 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/loop-simple/nested_4.c[841,854] [2020-12-22 04:49:37,823 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:49:37,835 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:49:37,853 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/loop-simple/nested_4.c[841,854] [2020-12-22 04:49:37,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:49:37,869 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:49:37,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37 WrapperNode [2020-12-22 04:49:37,870 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:49:37,871 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:49:37,871 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:49:37,871 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:49:37,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37" (1/1) ... [2020-12-22 04:49:37,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37" (1/1) ... [2020-12-22 04:49:37,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:49:37,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:49:37,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:49:37,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:49:37,922 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37" (1/1) ... [2020-12-22 04:49:37,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37" (1/1) ... [2020-12-22 04:49:37,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37" (1/1) ... [2020-12-22 04:49:37,924 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37" (1/1) ... [2020-12-22 04:49:37,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37" (1/1) ... [2020-12-22 04:49:37,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37" (1/1) ... [2020-12-22 04:49:37,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37" (1/1) ... [2020-12-22 04:49:37,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:49:37,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:49:37,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:49:37,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:49:37,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:49:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:49:38,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:49:38,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:49:38,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:49:38,328 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:49:38,329 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 04:49:38,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:38 BoogieIcfgContainer [2020-12-22 04:49:38,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:49:38,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:49:38,333 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:49:38,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:49:38,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:49:37" (1/3) ... [2020-12-22 04:49:38,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c45f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:49:38, skipping insertion in model container [2020-12-22 04:49:38,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:49:37" (2/3) ... [2020-12-22 04:49:38,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c45f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:49:38, skipping insertion in model container [2020-12-22 04:49:38,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:38" (3/3) ... [2020-12-22 04:49:38,341 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2020-12-22 04:49:38,348 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:49:38,353 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 04:49:38,373 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 04:49:38,401 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:49:38,401 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:49:38,401 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:49:38,402 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:49:38,402 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:49:38,402 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:49:38,402 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:49:38,402 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:49:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-22 04:49:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 04:49:38,425 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:38,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 04:49:38,426 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:38,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:38,433 INFO L82 PathProgramCache]: Analyzing trace with hash 28738512, now seen corresponding path program 1 times [2020-12-22 04:49:38,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:38,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100942522] [2020-12-22 04:49:38,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:38,624 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 04:49:38,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100942522] [2020-12-22 04:49:38,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:38,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 04:49:38,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443578489] [2020-12-22 04:49:38,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 04:49:38,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:38,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 04:49:38,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 04:49:38,655 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-12-22 04:49:38,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:38,679 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2020-12-22 04:49:38,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 04:49:38,680 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-22 04:49:38,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:38,690 INFO L225 Difference]: With dead ends: 32 [2020-12-22 04:49:38,690 INFO L226 Difference]: Without dead ends: 13 [2020-12-22 04:49:38,693 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 04:49:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-12-22 04:49:38,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-12-22 04:49:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-12-22 04:49:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-12-22 04:49:38,743 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2020-12-22 04:49:38,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:38,744 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-12-22 04:49:38,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 04:49:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2020-12-22 04:49:38,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-22 04:49:38,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:38,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-22 04:49:38,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:49:38,746 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:38,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:38,749 INFO L82 PathProgramCache]: Analyzing trace with hash 28698150, now seen corresponding path program 1 times [2020-12-22 04:49:38,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:38,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664827526] [2020-12-22 04:49:38,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:38,888 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 04:49:38,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664827526] [2020-12-22 04:49:38,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:38,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:38,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853647502] [2020-12-22 04:49:38,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:38,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:38,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:38,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:38,893 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 3 states. [2020-12-22 04:49:38,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:38,920 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2020-12-22 04:49:38,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:38,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-22 04:49:38,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:38,923 INFO L225 Difference]: With dead ends: 24 [2020-12-22 04:49:38,923 INFO L226 Difference]: Without dead ends: 21 [2020-12-22 04:49:38,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:38,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-22 04:49:38,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2020-12-22 04:49:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-22 04:49:38,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2020-12-22 04:49:38,930 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2020-12-22 04:49:38,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:38,930 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2020-12-22 04:49:38,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2020-12-22 04:49:38,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:49:38,931 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:38,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:38,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:49:38,932 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:38,933 INFO L82 PathProgramCache]: Analyzing trace with hash 270060130, now seen corresponding path program 1 times [2020-12-22 04:49:38,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:38,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50896900] [2020-12-22 04:49:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:38,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50896900] [2020-12-22 04:49:38,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:38,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:38,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281435568] [2020-12-22 04:49:38,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:38,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:38,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:38,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:38,989 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 3 states. [2020-12-22 04:49:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:39,043 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2020-12-22 04:49:39,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:39,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 04:49:39,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:39,045 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:49:39,045 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:49:39,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:49:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2020-12-22 04:49:39,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-22 04:49:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-12-22 04:49:39,050 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2020-12-22 04:49:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:39,050 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-12-22 04:49:39,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:39,051 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-12-22 04:49:39,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:49:39,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:39,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:39,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:49:39,052 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:39,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:39,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1248345450, now seen corresponding path program 1 times [2020-12-22 04:49:39,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:39,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701271480] [2020-12-22 04:49:39,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:39,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701271480] [2020-12-22 04:49:39,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:39,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:39,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839531418] [2020-12-22 04:49:39,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:39,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:39,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:39,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:39,099 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 3 states. [2020-12-22 04:49:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:39,129 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-12-22 04:49:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:39,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-22 04:49:39,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:39,130 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:49:39,131 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 04:49:39,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 04:49:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-12-22 04:49:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-22 04:49:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-12-22 04:49:39,136 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2020-12-22 04:49:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:39,136 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-12-22 04:49:39,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-12-22 04:49:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 04:49:39,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:39,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:39,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 04:49:39,138 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:39,139 INFO L82 PathProgramCache]: Analyzing trace with hash -793045314, now seen corresponding path program 1 times [2020-12-22 04:49:39,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:39,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189706654] [2020-12-22 04:49:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:39,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:39,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189706654] [2020-12-22 04:49:39,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:49:39,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:49:39,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784884423] [2020-12-22 04:49:39,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:49:39,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:39,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:49:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:39,230 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-12-22 04:49:39,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:39,255 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-12-22 04:49:39,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:49:39,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-12-22 04:49:39,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:39,257 INFO L225 Difference]: With dead ends: 31 [2020-12-22 04:49:39,257 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 04:49:39,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:49:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 04:49:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-22 04:49:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 04:49:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-12-22 04:49:39,262 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2020-12-22 04:49:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:39,263 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-12-22 04:49:39,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:49:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-12-22 04:49:39,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 04:49:39,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:39,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:39,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 04:49:39,265 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:39,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:39,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1973513092, now seen corresponding path program 1 times [2020-12-22 04:49:39,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:39,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412859521] [2020-12-22 04:49:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:39,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412859521] [2020-12-22 04:49:39,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950289040] [2020-12-22 04:49:39,349 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 04:49:39,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:39,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:49:39,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:39,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:39,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:49:39,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397063442] [2020-12-22 04:49:39,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:49:39,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:39,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:49:39,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:49:39,582 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-12-22 04:49:39,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:39,642 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-12-22 04:49:39,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:49:39,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-22 04:49:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:39,643 INFO L225 Difference]: With dead ends: 34 [2020-12-22 04:49:39,643 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 04:49:39,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:49:39,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 04:49:39,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-12-22 04:49:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 04:49:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-12-22 04:49:39,651 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2020-12-22 04:49:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:39,651 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-12-22 04:49:39,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:49:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-12-22 04:49:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 04:49:39,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:39,652 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:39,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 04:49:39,854 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:39,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:39,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1763285690, now seen corresponding path program 2 times [2020-12-22 04:49:39,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:39,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528591774] [2020-12-22 04:49:39,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:39,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 04:49:39,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528591774] [2020-12-22 04:49:39,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266565884] [2020-12-22 04:49:39,923 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 [2020-12-22 04:49:39,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:39,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:39,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:49:39,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:49:40,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:40,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-12-22 04:49:40,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156439828] [2020-12-22 04:49:40,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:49:40,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:40,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:49:40,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:40,029 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 7 states. [2020-12-22 04:49:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:40,119 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2020-12-22 04:49:40,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 04:49:40,120 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-12-22 04:49:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:40,120 INFO L225 Difference]: With dead ends: 57 [2020-12-22 04:49:40,121 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:49:40,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:49:40,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:49:40,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2020-12-22 04:49:40,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 04:49:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-12-22 04:49:40,128 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-12-22 04:49:40,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:40,128 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-12-22 04:49:40,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:49:40,129 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-12-22 04:49:40,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 04:49:40,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:40,130 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:49:40,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:40,344 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:40,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:40,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1745752790, now seen corresponding path program 3 times [2020-12-22 04:49:40,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:40,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031416653] [2020-12-22 04:49:40,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-12-22 04:49:40,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031416653] [2020-12-22 04:49:40,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182209248] [2020-12-22 04:49:40,446 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 [2020-12-22 04:49:40,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:49:40,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:40,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 04:49:40,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-12-22 04:49:40,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:40,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 04:49:40,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250054508] [2020-12-22 04:49:40,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:49:40,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:40,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:49:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:49:40,556 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-12-22 04:49:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:40,684 INFO L93 Difference]: Finished difference Result 227 states and 265 transitions. [2020-12-22 04:49:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:49:40,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-12-22 04:49:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:40,692 INFO L225 Difference]: With dead ends: 227 [2020-12-22 04:49:40,692 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 04:49:40,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:49:40,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 04:49:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 96. [2020-12-22 04:49:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 04:49:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2020-12-22 04:49:40,741 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 29 [2020-12-22 04:49:40,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:40,745 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2020-12-22 04:49:40,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:49:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2020-12-22 04:49:40,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-12-22 04:49:40,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:40,749 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:40,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:40,954 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:40,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:40,956 INFO L82 PathProgramCache]: Analyzing trace with hash 305051558, now seen corresponding path program 4 times [2020-12-22 04:49:40,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:40,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297066217] [2020-12-22 04:49:40,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:41,071 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2020-12-22 04:49:41,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297066217] [2020-12-22 04:49:41,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278922272] [2020-12-22 04:49:41,072 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 [2020-12-22 04:49:41,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:41,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:41,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:49:41,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 193 proven. 9 refuted. 0 times theorem prover too weak. 689 trivial. 0 not checked. [2020-12-22 04:49:41,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:41,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:49:41,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464634531] [2020-12-22 04:49:41,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:49:41,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:41,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:49:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:41,271 INFO L87 Difference]: Start difference. First operand 96 states and 110 transitions. Second operand 7 states. [2020-12-22 04:49:41,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:41,305 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2020-12-22 04:49:41,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:49:41,306 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-12-22 04:49:41,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:41,307 INFO L225 Difference]: With dead ends: 204 [2020-12-22 04:49:41,308 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 04:49:41,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 04:49:41,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2020-12-22 04:49:41,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 04:49:41,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2020-12-22 04:49:41,326 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 95 [2020-12-22 04:49:41,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:41,326 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2020-12-22 04:49:41,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:49:41,327 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2020-12-22 04:49:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 04:49:41,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:41,329 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:41,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:41,543 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:41,544 INFO L82 PathProgramCache]: Analyzing trace with hash -986598490, now seen corresponding path program 5 times [2020-12-22 04:49:41,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:41,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286233166] [2020-12-22 04:49:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 305 proven. 16 refuted. 0 times theorem prover too weak. 1074 trivial. 0 not checked. [2020-12-22 04:49:41,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286233166] [2020-12-22 04:49:41,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737586464] [2020-12-22 04:49:41,705 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 [2020-12-22 04:49:41,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 04:49:41,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:41,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:49:41,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 754 proven. 16 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2020-12-22 04:49:41,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:41,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:49:41,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048741115] [2020-12-22 04:49:41,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:49:41,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:41,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:49:41,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:41,901 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand 8 states. [2020-12-22 04:49:41,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:41,968 INFO L93 Difference]: Finished difference Result 234 states and 269 transitions. [2020-12-22 04:49:41,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:49:41,969 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 111 [2020-12-22 04:49:41,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:41,970 INFO L225 Difference]: With dead ends: 234 [2020-12-22 04:49:41,970 INFO L226 Difference]: Without dead ends: 136 [2020-12-22 04:49:41,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-22 04:49:41,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2020-12-22 04:49:41,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-22 04:49:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2020-12-22 04:49:41,989 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 111 [2020-12-22 04:49:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:41,989 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2020-12-22 04:49:41,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:49:41,989 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2020-12-22 04:49:41,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-12-22 04:49:41,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:41,992 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:42,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:49:42,206 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:42,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:42,208 INFO L82 PathProgramCache]: Analyzing trace with hash -859525210, now seen corresponding path program 6 times [2020-12-22 04:49:42,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:42,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72199151] [2020-12-22 04:49:42,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 445 proven. 25 refuted. 0 times theorem prover too weak. 1557 trivial. 0 not checked. [2020-12-22 04:49:42,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72199151] [2020-12-22 04:49:42,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26432687] [2020-12-22 04:49:42,331 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 [2020-12-22 04:49:42,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2020-12-22 04:49:42,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:42,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:49:42,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2027 backedges. 1094 proven. 25 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2020-12-22 04:49:42,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:42,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:49:42,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604369363] [2020-12-22 04:49:42,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:49:42,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:42,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:49:42,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:42,569 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand 9 states. [2020-12-22 04:49:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:42,615 INFO L93 Difference]: Finished difference Result 256 states and 291 transitions. [2020-12-22 04:49:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:49:42,616 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 127 [2020-12-22 04:49:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:42,617 INFO L225 Difference]: With dead ends: 256 [2020-12-22 04:49:42,617 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 04:49:42,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 04:49:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-12-22 04:49:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 04:49:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2020-12-22 04:49:42,638 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 127 [2020-12-22 04:49:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:42,639 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2020-12-22 04:49:42,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:49:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2020-12-22 04:49:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 04:49:42,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:42,642 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:42,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:42,857 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:42,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1331145638, now seen corresponding path program 7 times [2020-12-22 04:49:42,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:42,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370050529] [2020-12-22 04:49:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:42,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2020-12-22 04:49:43,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370050529] [2020-12-22 04:49:43,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545996935] [2020-12-22 04:49:43,014 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 [2020-12-22 04:49:43,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:43,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:49:43,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2787 backedges. 1066 proven. 89 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2020-12-22 04:49:43,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:43,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:49:43,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821608283] [2020-12-22 04:49:43,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:49:43,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:43,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:49:43,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:49:43,255 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand 6 states. [2020-12-22 04:49:43,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:43,298 INFO L93 Difference]: Finished difference Result 369 states and 406 transitions. [2020-12-22 04:49:43,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:49:43,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2020-12-22 04:49:43,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:43,301 INFO L225 Difference]: With dead ends: 369 [2020-12-22 04:49:43,301 INFO L226 Difference]: Without dead ends: 260 [2020-12-22 04:49:43,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:49:43,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-22 04:49:43,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 204. [2020-12-22 04:49:43,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-12-22 04:49:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 222 transitions. [2020-12-22 04:49:43,329 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 222 transitions. Word has length 143 [2020-12-22 04:49:43,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:43,329 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 222 transitions. [2020-12-22 04:49:43,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:49:43,329 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 222 transitions. [2020-12-22 04:49:43,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-12-22 04:49:43,333 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:43,334 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:43,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:43,547 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:43,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:43,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1485965146, now seen corresponding path program 8 times [2020-12-22 04:49:43,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:43,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965415758] [2020-12-22 04:49:43,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:43,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-12-22 04:49:43,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965415758] [2020-12-22 04:49:43,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464477707] [2020-12-22 04:49:43,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:43,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:43,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:43,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:49:43,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6253 backedges. 2377 proven. 264 refuted. 0 times theorem prover too weak. 3612 trivial. 0 not checked. [2020-12-22 04:49:44,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:44,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 04:49:44,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459656533] [2020-12-22 04:49:44,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 04:49:44,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:44,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 04:49:44,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:44,033 INFO L87 Difference]: Start difference. First operand 204 states and 222 transitions. Second operand 7 states. [2020-12-22 04:49:44,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:44,100 INFO L93 Difference]: Finished difference Result 474 states and 518 transitions. [2020-12-22 04:49:44,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 04:49:44,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 203 [2020-12-22 04:49:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:44,102 INFO L225 Difference]: With dead ends: 474 [2020-12-22 04:49:44,103 INFO L226 Difference]: Without dead ends: 320 [2020-12-22 04:49:44,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 04:49:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-22 04:49:44,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 264. [2020-12-22 04:49:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-12-22 04:49:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 286 transitions. [2020-12-22 04:49:44,132 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 286 transitions. Word has length 203 [2020-12-22 04:49:44,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:44,132 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 286 transitions. [2020-12-22 04:49:44,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 04:49:44,133 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 286 transitions. [2020-12-22 04:49:44,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-12-22 04:49:44,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:44,138 INFO L422 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:44,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 04:49:44,352 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:44,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:44,354 INFO L82 PathProgramCache]: Analyzing trace with hash 889851302, now seen corresponding path program 9 times [2020-12-22 04:49:44,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:44,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158765787] [2020-12-22 04:49:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4210 proven. 526 refuted. 0 times theorem prover too weak. 6375 trivial. 0 not checked. [2020-12-22 04:49:44,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158765787] [2020-12-22 04:49:44,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642687774] [2020-12-22 04:49:44,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-22 04:49:44,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 04:49:44,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:44,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:49:44,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 11111 backedges. 4214 proven. 526 refuted. 0 times theorem prover too weak. 6371 trivial. 0 not checked. [2020-12-22 04:49:45,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:45,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:49:45,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676891429] [2020-12-22 04:49:45,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:49:45,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:45,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:49:45,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:45,055 INFO L87 Difference]: Start difference. First operand 264 states and 286 transitions. Second operand 8 states. [2020-12-22 04:49:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:45,138 INFO L93 Difference]: Finished difference Result 579 states and 630 transitions. [2020-12-22 04:49:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:49:45,139 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 263 [2020-12-22 04:49:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:45,144 INFO L225 Difference]: With dead ends: 579 [2020-12-22 04:49:45,145 INFO L226 Difference]: Without dead ends: 380 [2020-12-22 04:49:45,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-12-22 04:49:45,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 324. [2020-12-22 04:49:45,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-12-22 04:49:45,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 350 transitions. [2020-12-22 04:49:45,190 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 350 transitions. Word has length 263 [2020-12-22 04:49:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:45,193 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 350 transitions. [2020-12-22 04:49:45,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:49:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 350 transitions. [2020-12-22 04:49:45,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-12-22 04:49:45,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:45,208 INFO L422 BasicCegarLoop]: trace histogram [120, 120, 20, 20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:45,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:45,422 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:45,423 INFO L82 PathProgramCache]: Analyzing trace with hash -955282778, now seen corresponding path program 10 times [2020-12-22 04:49:45,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:45,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108988525] [2020-12-22 04:49:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2020-12-22 04:49:45,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108988525] [2020-12-22 04:49:45,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575532164] [2020-12-22 04:49:45,737 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 [2020-12-22 04:49:45,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:49:45,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:45,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:49:45,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:46,166 INFO L134 CoverageAnalysis]: Checked inductivity of 17361 backedges. 6565 proven. 875 refuted. 0 times theorem prover too weak. 9921 trivial. 0 not checked. [2020-12-22 04:49:46,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:46,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:49:46,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724951940] [2020-12-22 04:49:46,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:49:46,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:46,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:49:46,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:46,169 INFO L87 Difference]: Start difference. First operand 324 states and 350 transitions. Second operand 9 states. [2020-12-22 04:49:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:46,232 INFO L93 Difference]: Finished difference Result 628 states and 682 transitions. [2020-12-22 04:49:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:49:46,234 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 323 [2020-12-22 04:49:46,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:46,236 INFO L225 Difference]: With dead ends: 628 [2020-12-22 04:49:46,236 INFO L226 Difference]: Without dead ends: 384 [2020-12-22 04:49:46,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:46,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2020-12-22 04:49:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2020-12-22 04:49:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-12-22 04:49:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 414 transitions. [2020-12-22 04:49:46,268 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 414 transitions. Word has length 323 [2020-12-22 04:49:46,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:46,269 INFO L481 AbstractCegarLoop]: Abstraction has 384 states and 414 transitions. [2020-12-22 04:49:46,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:49:46,269 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 414 transitions. [2020-12-22 04:49:46,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-12-22 04:49:46,276 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:46,276 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:46,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:49:46,490 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:46,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:46,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1217433690, now seen corresponding path program 11 times [2020-12-22 04:49:46,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:46,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779361641] [2020-12-22 04:49:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:46,876 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2020-12-22 04:49:46,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779361641] [2020-12-22 04:49:46,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130409139] [2020-12-22 04:49:46,877 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 [2020-12-22 04:49:47,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2020-12-22 04:49:47,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:47,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:49:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:47,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25003 backedges. 12595 proven. 3149 refuted. 0 times theorem prover too weak. 9259 trivial. 0 not checked. [2020-12-22 04:49:47,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:47,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:49:47,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180115157] [2020-12-22 04:49:47,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:49:47,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:47,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:49:47,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:49:47,627 INFO L87 Difference]: Start difference. First operand 384 states and 414 transitions. Second operand 6 states. [2020-12-22 04:49:47,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:47,695 INFO L93 Difference]: Finished difference Result 948 states and 1023 transitions. [2020-12-22 04:49:47,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:49:47,695 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 383 [2020-12-22 04:49:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:47,699 INFO L225 Difference]: With dead ends: 948 [2020-12-22 04:49:47,700 INFO L226 Difference]: Without dead ends: 754 [2020-12-22 04:49:47,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:49:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2020-12-22 04:49:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 570. [2020-12-22 04:49:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 570 states. [2020-12-22 04:49:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 614 transitions. [2020-12-22 04:49:47,745 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 614 transitions. Word has length 383 [2020-12-22 04:49:47,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:47,746 INFO L481 AbstractCegarLoop]: Abstraction has 570 states and 614 transitions. [2020-12-22 04:49:47,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:49:47,746 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 614 transitions. [2020-12-22 04:49:47,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2020-12-22 04:49:47,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:47,761 INFO L422 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-22 04:49:47,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:49:47,975 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:47,976 INFO L82 PathProgramCache]: Analyzing trace with hash 267351982, now seen corresponding path program 12 times [2020-12-22 04:49:47,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:47,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165076852] [2020-12-22 04:49:47,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 28332 proven. 9444 refuted. 0 times theorem prover too weak. 18608 trivial. 0 not checked. [2020-12-22 04:49:48,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165076852] [2020-12-22 04:49:48,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641899538] [2020-12-22 04:49:48,424 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:49,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 134 check-sat command(s) [2020-12-22 04:49:49,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:49,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 819 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 04:49:49,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 56384 backedges. 0 proven. 28334 refuted. 0 times theorem prover too weak. 28050 trivial. 0 not checked. [2020-12-22 04:49:49,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:49,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2020-12-22 04:49:49,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554793362] [2020-12-22 04:49:49,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:49:49,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:49,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:49:49,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:49,917 INFO L87 Difference]: Start difference. First operand 570 states and 614 transitions. Second operand 9 states. [2020-12-22 04:49:50,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:50,205 INFO L93 Difference]: Finished difference Result 2160 states and 2331 transitions. [2020-12-22 04:49:50,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:49:50,206 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 569 [2020-12-22 04:49:50,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:50,215 INFO L225 Difference]: With dead ends: 2160 [2020-12-22 04:49:50,216 INFO L226 Difference]: Without dead ends: 1873 [2020-12-22 04:49:50,217 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:49:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2020-12-22 04:49:50,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1131. [2020-12-22 04:49:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1131 states. [2020-12-22 04:49:50,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1218 transitions. [2020-12-22 04:49:50,310 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1218 transitions. Word has length 569 [2020-12-22 04:49:50,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:50,311 INFO L481 AbstractCegarLoop]: Abstraction has 1131 states and 1218 transitions. [2020-12-22 04:49:50,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:49:50,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1218 transitions. [2020-12-22 04:49:50,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2020-12-22 04:49:50,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:50,324 INFO L422 BasicCegarLoop]: trace histogram [432, 432, 72, 72, 72, 12, 12, 12, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-22 04:49:50,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 04:49:50,541 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash 550676450, now seen corresponding path program 13 times [2020-12-22 04:49:50,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:50,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472497753] [2020-12-22 04:49:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2020-12-22 04:49:51,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472497753] [2020-12-22 04:49:52,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607572714] [2020-12-22 04:49:52,000 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:52,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 1860 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 04:49:52,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 226074 backedges. 100725 proven. 18886 refuted. 0 times theorem prover too weak. 106463 trivial. 0 not checked. [2020-12-22 04:49:53,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:53,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 04:49:53,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75710819] [2020-12-22 04:49:53,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 04:49:53,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:53,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 04:49:53,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:53,816 INFO L87 Difference]: Start difference. First operand 1131 states and 1218 transitions. Second operand 8 states. [2020-12-22 04:49:54,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:54,004 INFO L93 Difference]: Finished difference Result 2441 states and 2631 transitions. [2020-12-22 04:49:54,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:49:54,005 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1130 [2020-12-22 04:49:54,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:54,014 INFO L225 Difference]: With dead ends: 2441 [2020-12-22 04:49:54,015 INFO L226 Difference]: Without dead ends: 1686 [2020-12-22 04:49:54,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 04:49:54,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1686 states. [2020-12-22 04:49:54,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1686 to 1410. [2020-12-22 04:49:54,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1410 states. [2020-12-22 04:49:54,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 1518 transitions. [2020-12-22 04:49:54,156 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 1518 transitions. Word has length 1130 [2020-12-22 04:49:54,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:54,157 INFO L481 AbstractCegarLoop]: Abstraction has 1410 states and 1518 transitions. [2020-12-22 04:49:54,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 04:49:54,157 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 1518 transitions. [2020-12-22 04:49:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1410 [2020-12-22 04:49:54,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:54,184 INFO L422 BasicCegarLoop]: trace histogram [540, 540, 90, 90, 90, 15, 15, 15, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-22 04:49:54,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:49:54,400 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:54,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:54,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1545912050, now seen corresponding path program 14 times [2020-12-22 04:49:54,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:54,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018621970] [2020-12-22 04:49:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:49:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:49:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2020-12-22 04:49:56,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018621970] [2020-12-22 04:49:56,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20859924] [2020-12-22 04:49:56,562 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:57,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:49:57,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:49:57,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:49:57,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:49:59,058 INFO L134 CoverageAnalysis]: Checked inductivity of 353397 backedges. 157375 proven. 31475 refuted. 0 times theorem prover too weak. 164547 trivial. 0 not checked. [2020-12-22 04:49:59,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:49:59,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:49:59,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396420951] [2020-12-22 04:49:59,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:49:59,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:49:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:49:59,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:59,062 INFO L87 Difference]: Start difference. First operand 1410 states and 1518 transitions. Second operand 9 states. [2020-12-22 04:49:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:49:59,207 INFO L93 Difference]: Finished difference Result 2630 states and 2834 transitions. [2020-12-22 04:49:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:49:59,208 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1409 [2020-12-22 04:49:59,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:49:59,216 INFO L225 Difference]: With dead ends: 2630 [2020-12-22 04:49:59,217 INFO L226 Difference]: Without dead ends: 1689 [2020-12-22 04:49:59,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1416 GetRequests, 1409 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:49:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2020-12-22 04:49:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 1689. [2020-12-22 04:49:59,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1689 states. [2020-12-22 04:49:59,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1689 states to 1689 states and 1818 transitions. [2020-12-22 04:49:59,328 INFO L78 Accepts]: Start accepts. Automaton has 1689 states and 1818 transitions. Word has length 1409 [2020-12-22 04:49:59,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:49:59,330 INFO L481 AbstractCegarLoop]: Abstraction has 1689 states and 1818 transitions. [2020-12-22 04:49:59,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:49:59,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1689 states and 1818 transitions. [2020-12-22 04:49:59,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2020-12-22 04:49:59,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:49:59,354 INFO L422 BasicCegarLoop]: trace histogram [648, 648, 108, 108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-22 04:49:59,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:49:59,568 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:49:59,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:49:59,569 INFO L82 PathProgramCache]: Analyzing trace with hash -477789726, now seen corresponding path program 15 times [2020-12-22 04:49:59,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:49:59,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904400838] [2020-12-22 04:49:59,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:50:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:50:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 0 proven. 339924 refuted. 0 times theorem prover too weak. 169119 trivial. 0 not checked. [2020-12-22 04:50:03,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904400838] [2020-12-22 04:50:03,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254417781] [2020-12-22 04:50:03,367 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:04,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 189 check-sat command(s) [2020-12-22 04:50:04,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:50:04,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 04:50:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:50:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 509043 backedges. 242787 proven. 36 refuted. 0 times theorem prover too weak. 266220 trivial. 0 not checked. [2020-12-22 04:50:07,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:50:07,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 17] total 21 [2020-12-22 04:50:07,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088055785] [2020-12-22 04:50:07,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:50:07,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:50:07,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:50:07,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:50:07,672 INFO L87 Difference]: Start difference. First operand 1689 states and 1818 transitions. Second operand 21 states. [2020-12-22 04:50:09,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:50:09,315 INFO L93 Difference]: Finished difference Result 4482 states and 4829 transitions. [2020-12-22 04:50:09,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-22 04:50:09,316 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1688 [2020-12-22 04:50:09,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:50:09,319 INFO L225 Difference]: With dead ends: 4482 [2020-12-22 04:50:09,319 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 04:50:09,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1737 GetRequests, 1674 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=524, Invalid=3636, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 04:50:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 04:50:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 04:50:09,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 04:50:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 04:50:09,328 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 1688 [2020-12-22 04:50:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:50:09,328 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 04:50:09,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:50:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 04:50:09,328 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 04:50:09,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:50:09,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 04:50:10,434 WARN L197 SmtUtils]: Spent 880.00 ms on a formula simplification. DAG size of input: 469 DAG size of output: 107 [2020-12-22 04:50:44,372 WARN L197 SmtUtils]: Spent 33.93 s on a formula simplification. DAG size of input: 2870 DAG size of output: 2116 [2020-12-22 04:50:44,710 WARN L197 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 11 [2020-12-22 04:52:28,901 WARN L197 SmtUtils]: Spent 1.74 m on a formula simplification. DAG size of input: 2032 DAG size of output: 29 [2020-12-22 04:52:29,021 INFO L189 CegarLoopUtils]: For program point L31-1(lines 31 33) no Hoare annotation was computed. [2020-12-22 04:52:29,021 INFO L189 CegarLoopUtils]: For program point L23-2(lines 23 29) no Hoare annotation was computed. [2020-12-22 04:52:29,022 INFO L185 CegarLoopUtils]: At program point L23-3(lines 23 29) the Hoare annotation is: (and (< ULTIMATE.start_main_~c~0 7) (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 7) (<= 6 ULTIMATE.start_main_~c~0) (= ULTIMATE.start_main_~d~0 6)) [2020-12-22 04:52:29,022 INFO L189 CegarLoopUtils]: For program point L32(line 32) no Hoare annotation was computed. [2020-12-22 04:52:29,022 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 04:52:29,022 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 04:52:29,022 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 04:52:29,023 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 32) no Hoare annotation was computed. [2020-12-22 04:52:29,023 INFO L189 CegarLoopUtils]: For program point L24-2(lines 24 28) no Hoare annotation was computed. [2020-12-22 04:52:29,023 INFO L185 CegarLoopUtils]: At program point L24-3(lines 24 28) the Hoare annotation is: (and (< ULTIMATE.start_main_~c~0 7) (< ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 6) (= ULTIMATE.start_main_~d~0 6)) [2020-12-22 04:52:29,023 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 04:52:29,023 INFO L189 CegarLoopUtils]: For program point L25-2(lines 25 27) no Hoare annotation was computed. [2020-12-22 04:52:29,023 INFO L185 CegarLoopUtils]: At program point L25-3(lines 25 27) the Hoare annotation is: (let ((.cse0 (< ULTIMATE.start_main_~a~0 6)) (.cse1 (< ULTIMATE.start_main_~b~0 6)) (.cse2 (< ULTIMATE.start_main_~c~0 6))) (or (and .cse0 .cse1 (= ULTIMATE.start_main_~d~0 1) .cse2) (and .cse0 .cse1 (= ULTIMATE.start_main_~d~0 0) .cse2) (and .cse0 .cse1 (= ULTIMATE.start_main_~d~0 5) .cse2) (and .cse0 .cse1 (= ULTIMATE.start_main_~d~0 2) .cse2) (and .cse0 .cse1 (= ULTIMATE.start_main_~d~0 6) .cse2) (and .cse0 (= ULTIMATE.start_main_~d~0 3) .cse1 .cse2) (and .cse0 (= ULTIMATE.start_main_~d~0 4) .cse1 .cse2))) [2020-12-22 04:52:29,023 INFO L192 CegarLoopUtils]: At program point L34(lines 15 35) the Hoare annotation is: true [2020-12-22 04:52:29,024 INFO L189 CegarLoopUtils]: For program point L22-2(lines 22 30) no Hoare annotation was computed. [2020-12-22 04:52:29,024 INFO L185 CegarLoopUtils]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (< ULTIMATE.start_main_~c~0 7) (< ULTIMATE.start_main_~b~0 7) (<= 6 ULTIMATE.start_main_~b~0) (<= 6 ULTIMATE.start_main_~c~0) (= ULTIMATE.start_main_~d~0 6) (< ULTIMATE.start_main_~a~0 7)) [2020-12-22 04:52:29,024 INFO L189 CegarLoopUtils]: For program point L22-4(lines 15 35) no Hoare annotation was computed. [2020-12-22 04:52:29,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 04:52:29 BoogieIcfgContainer [2020-12-22 04:52:29,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 04:52:29,059 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 04:52:29,059 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 04:52:29,059 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 04:52:29,059 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:49:38" (3/4) ... [2020-12-22 04:52:29,063 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 04:52:29,075 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-22 04:52:29,075 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 04:52:29,075 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:52:29,076 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 04:52:29,130 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/loop-simple/nested_4.c-witness.graphml [2020-12-22 04:52:29,130 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 04:52:29,132 INFO L168 Benchmark]: Toolchain (without parser) took 171559.24 ms. Allocated memory was 157.3 MB in the beginning and 2.0 GB in the end (delta: 1.9 GB). Free memory was 133.5 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 232.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:52:29,132 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 81.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 04:52:29,133 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.23 ms. Allocated memory is still 157.3 MB. Free memory was 133.4 MB in the beginning and 124.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-12-22 04:52:29,133 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.54 ms. Allocated memory is still 157.3 MB. Free memory was 124.0 MB in the beginning and 122.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:52:29,134 INFO L168 Benchmark]: Boogie Preprocessor took 26.17 ms. Allocated memory is still 157.3 MB. Free memory was 122.6 MB in the beginning and 121.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 04:52:29,134 INFO L168 Benchmark]: RCFGBuilder took 392.77 ms. Allocated memory is still 157.3 MB. Free memory was 121.5 MB in the beginning and 135.3 MB in the end (delta: -13.8 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. [2020-12-22 04:52:29,135 INFO L168 Benchmark]: TraceAbstraction took 170724.94 ms. Allocated memory was 157.3 MB in the beginning and 2.0 GB in the end (delta: 1.9 GB). Free memory was 134.6 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2020-12-22 04:52:29,135 INFO L168 Benchmark]: Witness Printer took 71.77 ms. Allocated memory is still 2.0 GB. Free memory was 1.8 GB in the beginning and 1.8 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 04:52:29,138 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 81.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 293.23 ms. Allocated memory is still 157.3 MB. Free memory was 133.4 MB in the beginning and 124.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.54 ms. Allocated memory is still 157.3 MB. Free memory was 124.0 MB in the beginning and 122.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.17 ms. Allocated memory is still 157.3 MB. Free memory was 122.6 MB in the beginning and 121.6 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 392.77 ms. Allocated memory is still 157.3 MB. Free memory was 121.5 MB in the beginning and 135.3 MB in the end (delta: -13.8 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 170724.94 ms. Allocated memory was 157.3 MB in the beginning and 2.0 GB in the end (delta: 1.9 GB). Free memory was 134.6 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. * Witness Printer took 71.77 ms. Allocated memory is still 2.0 GB. Free memory was 1.8 GB in the beginning and 1.8 GB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 32]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((c < 7 && a < 6) && b < 6) && d == 6 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((((((((a < 6 && b < 6) && d == 1) && c < 6) || (((a < 6 && b < 6) && d == 0) && c < 6)) || (((a < 6 && b < 6) && d == 5) && c < 6)) || (((a < 6 && b < 6) && d == 2) && c < 6)) || (((a < 6 && b < 6) && d == 6) && c < 6)) || (((a < 6 && d == 3) && b < 6) && c < 6)) || (((a < 6 && d == 4) && b < 6) && c < 6) - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((c < 7 && b < 7) && 6 <= b) && 6 <= c) && d == 6) && a < 7 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((c < 7 && a < 6) && b < 7) && 6 <= c) && d == 6 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 31.1s, OverallIterations: 20, TraceHistogramMax: 648, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 139.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 268 SDtfs, 600 SDslu, 604 SDs, 0 SdLazy, 661 SolverSat, 168 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6667 GetRequests, 6502 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1689occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 20 MinimizatonAttempts, 1518 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 1517 NumberOfFragments, 141 HoareAnnotationTreeSize, 5 FomulaSimplifications, 1116681 FormulaSimplificationTreeSizeReduction, 34.8s HoareSimplificationTime, 5 FomulaSimplificationsInter, 99988 FormulaSimplificationTreeSizeReductionInter, 104.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 4.5s SatisfiabilityAnalysisTime, 12.5s InterpolantComputationTime, 13057 NumberOfCodeBlocks, 11607 NumberOfCodeBlocksAsserted, 554 NumberOfCheckSat, 13022 ConstructedInterpolants, 0 QuantifiedInterpolants, 27946893 SizeOfPredicates, 4 NumberOfNonLiveVariables, 8601 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 35 InterpolantComputations, 5 PerfectInterpolantSequences, 1935203/2423578 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...