/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_25x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:13:43,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:13:43,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:13:43,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:13:43,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:13:43,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:13:43,538 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:13:43,540 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:13:43,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:13:43,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:13:43,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:13:43,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:13:43,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:13:43,545 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:13:43,546 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:13:43,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:13:43,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:13:43,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:13:43,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:13:43,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:13:43,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:13:43,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:13:43,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:13:43,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:13:43,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:13:43,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:13:43,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:13:43,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:13:43,569 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:13:43,583 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:13:43,583 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:13:43,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:13:43,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:13:43,585 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:13:43,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:13:43,585 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:13:43,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:13:43,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:13:43,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:13:43,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:13:43,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:13:43,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:13:43,586 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:13:43,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:13:43,587 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:13:43,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:13:43,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:13:43,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:13:43,588 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:13:43,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:13:43,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:13:43,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:13:43,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:13:43,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:13:43,589 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:13:43,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:13:43,589 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:13:43,589 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:13:43,590 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:13:43,867 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:13:43,882 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:13:43,885 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:13:43,886 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:13:43,887 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:13:43,887 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_25x0-2.c [2020-07-07 11:13:43,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4403478ac/c00d29dbe31649ba9ba88b1e6c7e82cf/FLAG0df3e8819 [2020-07-07 11:13:44,368 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:13:44,369 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_25x0-2.c [2020-07-07 11:13:44,375 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4403478ac/c00d29dbe31649ba9ba88b1e6c7e82cf/FLAG0df3e8819 [2020-07-07 11:13:44,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4403478ac/c00d29dbe31649ba9ba88b1e6c7e82cf [2020-07-07 11:13:44,759 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:13:44,761 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:13:44,762 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:13:44,762 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:13:44,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:13:44,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:13:44" (1/1) ... [2020-07-07 11:13:44,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d7a61f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:44, skipping insertion in model container [2020-07-07 11:13:44,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:13:44" (1/1) ... [2020-07-07 11:13:44,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:13:44,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:13:44,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:13:44,953 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:13:44,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:13:44,982 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:13:44,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:44 WrapperNode [2020-07-07 11:13:44,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:13:44,984 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:13:44,984 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:13:44,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:13:44,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:44" (1/1) ... [2020-07-07 11:13:44,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:44" (1/1) ... [2020-07-07 11:13:45,002 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:44" (1/1) ... [2020-07-07 11:13:45,002 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:44" (1/1) ... [2020-07-07 11:13:45,006 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:44" (1/1) ... [2020-07-07 11:13:45,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:44" (1/1) ... [2020-07-07 11:13:45,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:44" (1/1) ... [2020-07-07 11:13:45,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:13:45,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:13:45,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:13:45,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:13:45,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:44" (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 [2020-07-07 11:13:45,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:13:45,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:13:45,147 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-07 11:13:45,147 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:13:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:13:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-07 11:13:45,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:13:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:13:45,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:13:45,307 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:13:45,307 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:13:45,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:13:45 BoogieIcfgContainer [2020-07-07 11:13:45,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:13:45,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:13:45,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:13:45,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:13:45,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:13:44" (1/3) ... [2020-07-07 11:13:45,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b76580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:13:45, skipping insertion in model container [2020-07-07 11:13:45,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:44" (2/3) ... [2020-07-07 11:13:45,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b76580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:13:45, skipping insertion in model container [2020-07-07 11:13:45,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:13:45" (3/3) ... [2020-07-07 11:13:45,318 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2020-07-07 11:13:45,328 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:13:45,335 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:13:45,348 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:13:45,370 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:13:45,371 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:13:45,371 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:13:45,371 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:13:45,371 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:13:45,371 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:13:45,371 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:13:45,372 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:13:45,389 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-07 11:13:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:13:45,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:45,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:45,397 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:45,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:45,403 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-07 11:13:45,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:45,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501536022] [2020-07-07 11:13:45,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:13:45,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501536022] [2020-07-07 11:13:45,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:13:45,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:13:45,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466964158] [2020-07-07 11:13:45,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:13:45,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:13:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:13:45,678 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-07 11:13:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:45,784 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-07 11:13:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:13:45,786 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:13:45,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:45,795 INFO L225 Difference]: With dead ends: 30 [2020-07-07 11:13:45,795 INFO L226 Difference]: Without dead ends: 18 [2020-07-07 11:13:45,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:13:45,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-07 11:13:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-07 11:13:45,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-07 11:13:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-07 11:13:45,839 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-07 11:13:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:45,840 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-07 11:13:45,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:13:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-07 11:13:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 11:13:45,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:45,842 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:45,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:13:45,843 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:45,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:45,843 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-07 11:13:45,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:45,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079920325] [2020-07-07 11:13:45,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:45,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:13:45,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079920325] [2020-07-07 11:13:45,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354808983] [2020-07-07 11:13:45,992 INFO L94 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 [2020-07-07 11:13:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:46,035 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:13:46,041 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:13:46,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:46,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-07 11:13:46,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409619047] [2020-07-07 11:13:46,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:13:46,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:46,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:13:46,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:13:46,108 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-07 11:13:46,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:46,165 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-07 11:13:46,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:13:46,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-07 11:13:46,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:46,167 INFO L225 Difference]: With dead ends: 25 [2020-07-07 11:13:46,168 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 11:13:46,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:13:46,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 11:13:46,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-07 11:13:46,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:13:46,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-07 11:13:46,176 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-07 11:13:46,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:46,177 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-07 11:13:46,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:13:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-07 11:13:46,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 11:13:46,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:46,178 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:46,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:13:46,393 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:46,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:46,394 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-07 11:13:46,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:46,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633462593] [2020-07-07 11:13:46,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:13:46,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633462593] [2020-07-07 11:13:46,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496420939] [2020-07-07 11:13:46,576 INFO L92 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 [2020-07-07 11:13:46,631 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:13:46,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:46,633 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:13:46,637 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:13:46,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:46,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-07 11:13:46,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624946182] [2020-07-07 11:13:46,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:13:46,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:46,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:13:46,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:13:46,680 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-07 11:13:46,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:46,760 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-07 11:13:46,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:13:46,760 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-07 11:13:46,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:46,762 INFO L225 Difference]: With dead ends: 28 [2020-07-07 11:13:46,762 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 11:13:46,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:13:46,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 11:13:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-07 11:13:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 11:13:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-07 11:13:46,769 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-07 11:13:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:46,770 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-07 11:13:46,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:13:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-07 11:13:46,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:13:46,772 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:46,772 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:46,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:46,985 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:46,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:46,987 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-07 11:13:46,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:46,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035119742] [2020-07-07 11:13:46,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:47,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:13:47,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035119742] [2020-07-07 11:13:47,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206377183] [2020-07-07 11:13:47,219 INFO L92 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 [2020-07-07 11:13:47,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:13:47,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:47,248 INFO L264 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:13:47,250 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:13:47,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:47,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-07 11:13:47,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693670371] [2020-07-07 11:13:47,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:13:47,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:13:47,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:13:47,278 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-07 11:13:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:47,344 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-07 11:13:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:13:47,345 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-07 11:13:47,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:47,346 INFO L225 Difference]: With dead ends: 31 [2020-07-07 11:13:47,346 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 11:13:47,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:13:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 11:13:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-07 11:13:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:13:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-07 11:13:47,353 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-07 11:13:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:47,353 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-07 11:13:47,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:13:47,354 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-07 11:13:47,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:13:47,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:47,355 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:47,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:47,569 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:47,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:47,570 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-07 11:13:47,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:47,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029845534] [2020-07-07 11:13:47,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:47,728 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-07 11:13:47,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029845534] [2020-07-07 11:13:47,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534498267] [2020-07-07 11:13:47,728 INFO L92 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 [2020-07-07 11:13:47,760 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:13:47,760 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:47,761 INFO L264 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:13:47,767 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-07 11:13:47,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:47,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-07 11:13:47,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824428490] [2020-07-07 11:13:47,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:13:47,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:47,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:13:47,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:13:47,815 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-07 11:13:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:47,918 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-07 11:13:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:13:47,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-07 11:13:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:47,922 INFO L225 Difference]: With dead ends: 34 [2020-07-07 11:13:47,922 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:13:47,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:13:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:13:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 11:13:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:13:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-07 11:13:47,936 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-07 11:13:47,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:47,936 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-07 11:13:47,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:13:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-07 11:13:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 11:13:47,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:47,939 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:48,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:48,154 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-07 11:13:48,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:48,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264508940] [2020-07-07 11:13:48,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:13:48,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264508940] [2020-07-07 11:13:48,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386562278] [2020-07-07 11:13:48,321 INFO L92 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 [2020-07-07 11:13:48,370 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-07 11:13:48,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:48,372 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:13:48,376 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:13:48,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:48,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-07 11:13:48,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037343471] [2020-07-07 11:13:48,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:13:48,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:48,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:13:48,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:13:48,438 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-07 11:13:48,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:48,521 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-07 11:13:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:13:48,521 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-07 11:13:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:48,522 INFO L225 Difference]: With dead ends: 37 [2020-07-07 11:13:48,523 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 11:13:48,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:13:48,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 11:13:48,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-07 11:13:48,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:13:48,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-07 11:13:48,530 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-07 11:13:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:48,530 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-07 11:13:48,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:13:48,530 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-07 11:13:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 11:13:48,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:48,532 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:48,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 11:13:48,734 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:48,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-07 11:13:48,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:48,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625609682] [2020-07-07 11:13:48,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:48,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-07 11:13:48,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625609682] [2020-07-07 11:13:48,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436990646] [2020-07-07 11:13:48,953 INFO L92 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 [2020-07-07 11:13:49,004 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-07 11:13:49,005 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:49,006 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-07 11:13:49,019 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-07 11:13:49,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:49,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-07 11:13:49,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488431635] [2020-07-07 11:13:49,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:13:49,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:49,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:13:49,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:13:49,055 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-07 11:13:49,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:49,165 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-07 11:13:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:13:49,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-07 11:13:49,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:49,167 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:13:49,167 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:13:49,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:13:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:13:49,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-07 11:13:49,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:13:49,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-07 11:13:49,179 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-07 11:13:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:49,179 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-07 11:13:49,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:13:49,183 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-07 11:13:49,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 11:13:49,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:49,184 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:49,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:49,401 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:49,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:49,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-07 11:13:49,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:49,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468032002] [2020-07-07 11:13:49,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:49,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-07 11:13:49,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468032002] [2020-07-07 11:13:49,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140968197] [2020-07-07 11:13:49,615 INFO L92 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 [2020-07-07 11:13:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:49,667 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-07 11:13:49,673 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-07 11:13:49,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:49,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-07 11:13:49,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867238637] [2020-07-07 11:13:49,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:13:49,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:49,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:13:49,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:13:49,703 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-07 11:13:49,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:49,815 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-07 11:13:49,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:13:49,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-07 11:13:49,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:49,817 INFO L225 Difference]: With dead ends: 43 [2020-07-07 11:13:49,817 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:13:49,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:13:49,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:13:49,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-07 11:13:49,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:13:49,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-07 11:13:49,824 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-07 11:13:49,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:49,824 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-07 11:13:49,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:13:49,824 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-07 11:13:49,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-07 11:13:49,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:49,826 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:50,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:50,040 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:50,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:50,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-07 11:13:50,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:50,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691480391] [2020-07-07 11:13:50,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,282 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-07 11:13:50,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691480391] [2020-07-07 11:13:50,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084928280] [2020-07-07 11:13:50,283 INFO L92 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 [2020-07-07 11:13:50,319 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:13:50,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:50,321 INFO L264 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-07 11:13:50,324 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-07 11:13:50,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:50,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-07 11:13:50,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819989412] [2020-07-07 11:13:50,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:13:50,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:50,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:13:50,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:13:50,373 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-07 11:13:50,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:50,502 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-07 11:13:50,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:13:50,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-07 11:13:50,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:50,504 INFO L225 Difference]: With dead ends: 46 [2020-07-07 11:13:50,504 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 11:13:50,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:13:50,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 11:13:50,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-07 11:13:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 11:13:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-07 11:13:50,512 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-07 11:13:50,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:50,512 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-07 11:13:50,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:13:50,512 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-07 11:13:50,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-07 11:13:50,514 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:50,514 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:50,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 11:13:50,729 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:50,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:50,730 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-07 11:13:50,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:50,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071360194] [2020-07-07 11:13:50,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:50,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,043 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-07 11:13:51,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071360194] [2020-07-07 11:13:51,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074673519] [2020-07-07 11:13:51,044 INFO L92 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 [2020-07-07 11:13:51,106 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-07 11:13:51,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:51,107 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-07 11:13:51,110 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-07 11:13:51,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:51,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-07 11:13:51,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869425747] [2020-07-07 11:13:51,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:13:51,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:51,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:13:51,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:13:51,155 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-07 11:13:51,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:51,295 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-07 11:13:51,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 11:13:51,296 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-07 11:13:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:51,297 INFO L225 Difference]: With dead ends: 49 [2020-07-07 11:13:51,297 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 11:13:51,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-07-07 11:13:51,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 11:13:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-07 11:13:51,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 11:13:51,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-07 11:13:51,305 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-07 11:13:51,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:51,305 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-07 11:13:51,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:13:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-07 11:13:51,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-07 11:13:51,307 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:51,307 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:51,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:51,522 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:51,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:51,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-07 11:13:51,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:51,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418153184] [2020-07-07 11:13:51,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-07 11:13:51,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418153184] [2020-07-07 11:13:51,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919986539] [2020-07-07 11:13:51,851 INFO L92 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 [2020-07-07 11:13:51,893 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:13:51,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:51,895 INFO L264 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-07 11:13:51,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:51,936 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-07 11:13:51,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:51,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-07 11:13:51,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843268045] [2020-07-07 11:13:51,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:13:51,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:51,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:13:51,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:13:51,938 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-07 11:13:52,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:52,112 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-07 11:13:52,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:13:52,113 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-07 11:13:52,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:52,115 INFO L225 Difference]: With dead ends: 52 [2020-07-07 11:13:52,115 INFO L226 Difference]: Without dead ends: 48 [2020-07-07 11:13:52,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-07-07 11:13:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-07 11:13:52,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-07 11:13:52,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 11:13:52,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-07 11:13:52,129 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-07 11:13:52,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:52,130 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-07 11:13:52,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:13:52,130 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-07 11:13:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 11:13:52,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:52,132 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:52,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:52,347 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:52,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:52,348 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-07 11:13:52,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:52,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286551283] [2020-07-07 11:13:52,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-07 11:13:52,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286551283] [2020-07-07 11:13:52,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723850033] [2020-07-07 11:13:52,706 INFO L92 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 [2020-07-07 11:13:52,766 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-07-07 11:13:52,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:52,768 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-07 11:13:52,770 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-07 11:13:52,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:52,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-07 11:13:52,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917168421] [2020-07-07 11:13:52,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 11:13:52,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:52,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 11:13:52,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:13:52,812 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-07 11:13:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:52,987 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-07 11:13:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:13:52,988 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-07 11:13:52,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:52,989 INFO L225 Difference]: With dead ends: 55 [2020-07-07 11:13:52,989 INFO L226 Difference]: Without dead ends: 51 [2020-07-07 11:13:52,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-07-07 11:13:52,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-07 11:13:53,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-07 11:13:53,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 11:13:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-07 11:13:53,005 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-07 11:13:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:53,006 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-07 11:13:53,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 11:13:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-07 11:13:53,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-07 11:13:53,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:53,008 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:53,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-07 11:13:53,223 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:53,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:53,224 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-07 11:13:53,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:53,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391648370] [2020-07-07 11:13:53,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:53,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-07 11:13:53,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391648370] [2020-07-07 11:13:53,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269885425] [2020-07-07 11:13:53,678 INFO L92 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 [2020-07-07 11:13:53,725 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-07-07 11:13:53,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:53,727 INFO L264 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-07 11:13:53,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:53,763 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-07 11:13:53,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:53,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-07 11:13:53,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531214396] [2020-07-07 11:13:53,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:13:53,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:53,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:13:53,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:13:53,765 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-07 11:13:53,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:53,936 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-07 11:13:53,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 11:13:53,937 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-07 11:13:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:53,938 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:13:53,938 INFO L226 Difference]: Without dead ends: 54 [2020-07-07 11:13:53,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-07 11:13:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-07 11:13:53,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-07 11:13:53,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:13:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-07 11:13:53,945 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-07 11:13:53,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:53,945 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-07 11:13:53,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:13:53,946 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-07 11:13:53,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-07 11:13:53,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:53,947 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:54,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 11:13:54,160 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:54,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-07 11:13:54,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:54,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922055103] [2020-07-07 11:13:54,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-07 11:13:54,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922055103] [2020-07-07 11:13:54,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020673296] [2020-07-07 11:13:54,652 INFO L92 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 [2020-07-07 11:13:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:54,701 INFO L264 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-07 11:13:54,703 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-07 11:13:54,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:54,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-07 11:13:54,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814799788] [2020-07-07 11:13:54,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 11:13:54,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:54,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 11:13:54,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:13:54,750 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-07 11:13:54,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:54,951 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-07 11:13:54,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 11:13:54,951 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-07 11:13:54,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:54,952 INFO L225 Difference]: With dead ends: 61 [2020-07-07 11:13:54,953 INFO L226 Difference]: Without dead ends: 57 [2020-07-07 11:13:54,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 11:13:54,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-07 11:13:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-07 11:13:54,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:13:54,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-07 11:13:54,960 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-07 11:13:54,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:54,960 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-07 11:13:54,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 11:13:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-07 11:13:54,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-07 11:13:54,962 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:54,962 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:55,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-07 11:13:55,175 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:55,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:55,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-07 11:13:55,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:55,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600037537] [2020-07-07 11:13:55,177 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:55,666 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-07 11:13:55,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600037537] [2020-07-07 11:13:55,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745717447] [2020-07-07 11:13:55,667 INFO L92 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 [2020-07-07 11:13:55,715 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:13:55,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:55,717 INFO L264 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-07 11:13:55,719 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:55,773 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-07 11:13:55,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:55,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-07 11:13:55,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473932516] [2020-07-07 11:13:55,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:13:55,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:55,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:13:55,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:13:55,775 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-07 11:13:55,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:55,965 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-07 11:13:55,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:13:55,965 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-07 11:13:55,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:55,967 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:13:55,967 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 11:13:55,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 11:13:55,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 11:13:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-07 11:13:55,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 11:13:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-07 11:13:55,973 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-07 11:13:55,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:55,974 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-07 11:13:55,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:13:55,974 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-07 11:13:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-07 11:13:55,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:55,975 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:56,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:56,189 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:56,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-07 11:13:56,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:56,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495537284] [2020-07-07 11:13:56,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-07 11:13:56,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495537284] [2020-07-07 11:13:56,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677120945] [2020-07-07 11:13:56,747 INFO L92 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 [2020-07-07 11:13:56,817 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-07-07 11:13:56,817 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:56,819 INFO L264 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-07 11:13:56,823 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-07 11:13:56,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:56,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-07-07 11:13:56,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223595340] [2020-07-07 11:13:56,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 11:13:56,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 11:13:56,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:13:56,876 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 21 states. [2020-07-07 11:13:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:57,131 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-07 11:13:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 11:13:57,131 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-07-07 11:13:57,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:57,133 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:13:57,133 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:13:57,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 11:13:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:13:57,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-07 11:13:57,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-07 11:13:57,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-07 11:13:57,146 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-07 11:13:57,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:57,151 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-07 11:13:57,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 11:13:57,153 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-07 11:13:57,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-07 11:13:57,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:57,155 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:57,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-07 11:13:57,356 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:57,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-07-07 11:13:57,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:57,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657177685] [2020-07-07 11:13:57,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-07 11:13:57,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657177685] [2020-07-07 11:13:57,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299236940] [2020-07-07 11:13:57,938 INFO L92 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:57,991 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:13:57,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:57,992 INFO L264 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-07 11:13:57,995 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-07 11:13:58,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:58,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-07-07 11:13:58,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348980055] [2020-07-07 11:13:58,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 11:13:58,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:58,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 11:13:58,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:13:58,043 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 22 states. [2020-07-07 11:13:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:58,286 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-07 11:13:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 11:13:58,286 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-07-07 11:13:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:58,288 INFO L225 Difference]: With dead ends: 70 [2020-07-07 11:13:58,289 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 11:13:58,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 11:13:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 11:13:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-07 11:13:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-07 11:13:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-07 11:13:58,296 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-07 11:13:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:58,296 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-07 11:13:58,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 11:13:58,297 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-07 11:13:58,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-07 11:13:58,300 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:58,300 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:58,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-07 11:13:58,511 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:58,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:58,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-07-07 11:13:58,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:58,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795282584] [2020-07-07 11:13:58,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-07 11:13:59,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795282584] [2020-07-07 11:13:59,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400384114] [2020-07-07 11:13:59,218 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:59,320 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-07-07 11:13:59,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:59,324 INFO L264 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-07 11:13:59,328 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:59,372 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-07 11:13:59,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:59,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-07-07 11:13:59,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598731111] [2020-07-07 11:13:59,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-07 11:13:59,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:59,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-07 11:13:59,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:13:59,376 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 23 states. [2020-07-07 11:13:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:59,645 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-07 11:13:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 11:13:59,646 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 115 [2020-07-07 11:13:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:59,647 INFO L225 Difference]: With dead ends: 73 [2020-07-07 11:13:59,647 INFO L226 Difference]: Without dead ends: 69 [2020-07-07 11:13:59,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 11:13:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-07 11:13:59,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-07 11:13:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-07 11:13:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-07 11:13:59,653 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-07 11:13:59,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:59,653 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-07 11:13:59,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-07 11:13:59,653 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-07 11:13:59,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-07 11:13:59,654 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:59,655 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:59,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-07 11:13:59,866 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:59,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:59,867 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-07-07 11:13:59,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:59,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144749864] [2020-07-07 11:13:59,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:59,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:00,707 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-07 11:14:00,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144749864] [2020-07-07 11:14:00,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023418724] [2020-07-07 11:14:00,708 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:00,792 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-07-07 11:14:00,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:14:00,794 INFO L264 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-07 11:14:00,797 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:14:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-07 11:14:00,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:14:00,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-07-07 11:14:00,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837857909] [2020-07-07 11:14:00,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 11:14:00,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:14:00,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 11:14:00,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:14:00,841 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 24 states. [2020-07-07 11:14:01,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:14:01,148 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-07 11:14:01,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 11:14:01,148 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2020-07-07 11:14:01,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:14:01,150 INFO L225 Difference]: With dead ends: 76 [2020-07-07 11:14:01,150 INFO L226 Difference]: Without dead ends: 72 [2020-07-07 11:14:01,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 11:14:01,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-07 11:14:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-07 11:14:01,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-07 11:14:01,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-07 11:14:01,157 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-07 11:14:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:14:01,161 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-07 11:14:01,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 11:14:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-07 11:14:01,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-07 11:14:01,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:14:01,163 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:14:01,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:01,364 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:14:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:14:01,365 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-07-07 11:14:01,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:14:01,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935306476] [2020-07-07 11:14:01,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:14:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-07 11:14:02,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935306476] [2020-07-07 11:14:02,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164162168] [2020-07-07 11:14:02,388 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:02,492 INFO L264 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-07 11:14:02,496 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:14:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-07 11:14:02,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:14:02,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-07-07 11:14:02,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887359194] [2020-07-07 11:14:02,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 11:14:02,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:14:02,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 11:14:02,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-07 11:14:02,579 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 25 states. [2020-07-07 11:14:03,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:14:03,004 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-07 11:14:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 11:14:03,006 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2020-07-07 11:14:03,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:14:03,008 INFO L225 Difference]: With dead ends: 79 [2020-07-07 11:14:03,009 INFO L226 Difference]: Without dead ends: 75 [2020-07-07 11:14:03,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 11:14:03,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-07 11:14:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-07 11:14:03,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-07 11:14:03,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-07 11:14:03,019 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-07 11:14:03,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:14:03,020 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-07 11:14:03,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 11:14:03,020 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-07 11:14:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-07 11:14:03,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:14:03,023 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:14:03,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:03,237 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:14:03,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:14:03,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-07-07 11:14:03,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:14:03,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771359955] [2020-07-07 11:14:03,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:14:03,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:04,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-07 11:14:04,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771359955] [2020-07-07 11:14:04,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63216551] [2020-07-07 11:14:04,295 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:04,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:14:04,400 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:14:04,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-07 11:14:04,408 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:14:04,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-07 11:14:04,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:14:04,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-07-07 11:14:04,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479912908] [2020-07-07 11:14:04,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-07 11:14:04,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:14:04,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-07 11:14:04,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-07-07 11:14:04,480 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 26 states. [2020-07-07 11:14:04,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:14:04,884 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-07-07 11:14:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-07 11:14:04,884 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 133 [2020-07-07 11:14:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:14:04,886 INFO L225 Difference]: With dead ends: 82 [2020-07-07 11:14:04,886 INFO L226 Difference]: Without dead ends: 78 [2020-07-07 11:14:04,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=785, Invalid=1377, Unknown=0, NotChecked=0, Total=2162 [2020-07-07 11:14:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-07 11:14:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-07 11:14:04,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-07 11:14:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-07 11:14:04,892 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-07-07 11:14:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:14:04,893 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-07 11:14:04,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-07 11:14:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-07 11:14:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-07 11:14:04,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:14:04,895 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:14:05,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-07 11:14:05,110 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:14:05,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:14:05,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2020-07-07 11:14:05,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:14:05,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905543906] [2020-07-07 11:14:05,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:14:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-07 11:14:06,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905543906] [2020-07-07 11:14:06,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693228908] [2020-07-07 11:14:06,163 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:06,234 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-07-07 11:14:06,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:14:06,235 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-07 11:14:06,238 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:14:06,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-07 11:14:06,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:14:06,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-07-07 11:14:06,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479923771] [2020-07-07 11:14:06,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-07 11:14:06,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:14:06,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-07 11:14:06,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2020-07-07 11:14:06,305 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 27 states. [2020-07-07 11:14:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:14:06,617 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-07-07 11:14:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 11:14:06,619 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 139 [2020-07-07 11:14:06,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:14:06,621 INFO L225 Difference]: With dead ends: 85 [2020-07-07 11:14:06,621 INFO L226 Difference]: Without dead ends: 81 [2020-07-07 11:14:06,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=855, Invalid=1497, Unknown=0, NotChecked=0, Total=2352 [2020-07-07 11:14:06,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-07 11:14:06,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-07 11:14:06,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-07 11:14:06,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-07-07 11:14:06,629 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-07-07 11:14:06,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:14:06,630 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-07-07 11:14:06,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-07 11:14:06,630 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-07-07 11:14:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-07 11:14:06,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:14:06,632 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:14:06,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-07 11:14:06,844 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:14:06,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:14:06,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1314278308, now seen corresponding path program 22 times [2020-07-07 11:14:06,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:14:06,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710725733] [2020-07-07 11:14:06,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:14:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:07,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-07 11:14:07,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710725733] [2020-07-07 11:14:07,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364180384] [2020-07-07 11:14:07,865 INFO L92 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:07,927 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:14:07,927 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:14:07,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-07 11:14:07,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:14:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-07 11:14:07,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:14:07,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-07-07 11:14:07,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415399304] [2020-07-07 11:14:07,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-07 11:14:07,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:14:07,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-07 11:14:07,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2020-07-07 11:14:07,994 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 28 states. [2020-07-07 11:14:08,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:14:08,363 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-07-07 11:14:08,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-07 11:14:08,364 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 145 [2020-07-07 11:14:08,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:14:08,365 INFO L225 Difference]: With dead ends: 88 [2020-07-07 11:14:08,365 INFO L226 Difference]: Without dead ends: 84 [2020-07-07 11:14:08,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2020-07-07 11:14:08,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-07 11:14:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-07-07 11:14:08,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-07 11:14:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-07-07 11:14:08,373 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-07-07 11:14:08,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:14:08,374 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-07-07 11:14:08,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-07 11:14:08,374 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-07-07 11:14:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-07 11:14:08,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:14:08,376 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:14:08,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:08,589 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:14:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:14:08,590 INFO L82 PathProgramCache]: Analyzing trace with hash 2015638980, now seen corresponding path program 23 times [2020-07-07 11:14:08,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:14:08,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401943300] [2020-07-07 11:14:08,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:14:08,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:08,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-07 11:14:09,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401943300] [2020-07-07 11:14:09,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811288024] [2020-07-07 11:14:09,767 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:09,865 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-07-07 11:14:09,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:14:09,868 INFO L264 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-07 11:14:09,870 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:14:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-07 11:14:09,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:14:09,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-07-07 11:14:09,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024078048] [2020-07-07 11:14:09,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-07 11:14:09,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:14:09,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-07 11:14:09,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2020-07-07 11:14:09,954 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 29 states. [2020-07-07 11:14:10,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:14:10,328 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-07-07 11:14:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-07 11:14:10,328 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 151 [2020-07-07 11:14:10,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:14:10,329 INFO L225 Difference]: With dead ends: 91 [2020-07-07 11:14:10,330 INFO L226 Difference]: Without dead ends: 87 [2020-07-07 11:14:10,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1004, Invalid=1752, Unknown=0, NotChecked=0, Total=2756 [2020-07-07 11:14:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-07 11:14:10,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-07-07 11:14:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-07 11:14:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-07-07 11:14:10,337 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-07-07 11:14:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:14:10,338 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-07-07 11:14:10,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-07 11:14:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-07-07 11:14:10,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-07 11:14:10,341 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:14:10,342 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:14:10,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-07 11:14:10,542 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:14:10,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:14:10,543 INFO L82 PathProgramCache]: Analyzing trace with hash 483163804, now seen corresponding path program 24 times [2020-07-07 11:14:10,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:14:10,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136477718] [2020-07-07 11:14:10,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:14:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:14:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-07 11:14:11,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136477718] [2020-07-07 11:14:11,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126689296] [2020-07-07 11:14:11,673 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:11,757 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-07-07 11:14:11,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:14:11,759 INFO L264 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 52 conjunts are in the unsatisfiable core [2020-07-07 11:14:11,763 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:14:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-07 11:14:11,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:14:11,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-07-07 11:14:11,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586185521] [2020-07-07 11:14:11,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-07 11:14:11,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:14:11,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-07 11:14:11,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2020-07-07 11:14:11,822 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 30 states. [2020-07-07 11:14:12,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:14:12,227 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-07-07 11:14:12,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-07 11:14:12,227 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 157 [2020-07-07 11:14:12,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:14:12,229 INFO L225 Difference]: With dead ends: 94 [2020-07-07 11:14:12,229 INFO L226 Difference]: Without dead ends: 90 [2020-07-07 11:14:12,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1083, Invalid=1887, Unknown=0, NotChecked=0, Total=2970 [2020-07-07 11:14:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-07 11:14:12,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-07 11:14:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-07 11:14:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-07-07 11:14:12,240 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-07-07 11:14:12,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:14:12,240 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-07-07 11:14:12,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-07 11:14:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-07-07 11:14:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-07 11:14:12,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:14:12,243 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:14:12,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:14:12,444 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:14:12,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:14:12,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1060706820, now seen corresponding path program 25 times [2020-07-07 11:14:12,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:14:12,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535221109] [2020-07-07 11:14:12,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:14:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:14:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:14:12,541 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:14:12,541 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:14:12,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-07 11:14:12,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:14:12 BoogieIcfgContainer [2020-07-07 11:14:12,606 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:14:12,608 INFO L168 Benchmark]: Toolchain (without parser) took 27847.69 ms. Allocated memory was 137.9 MB in the beginning and 633.3 MB in the end (delta: 495.5 MB). Free memory was 102.8 MB in the beginning and 564.6 MB in the end (delta: -461.9 MB). Peak memory consumption was 33.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:14:12,609 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:14:12,609 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.60 ms. Allocated memory is still 137.9 MB. Free memory was 102.3 MB in the beginning and 93.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:14:12,610 INFO L168 Benchmark]: Boogie Preprocessor took 26.44 ms. Allocated memory is still 137.9 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:14:12,610 INFO L168 Benchmark]: RCFGBuilder took 300.50 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 169.9 MB in the end (delta: -78.1 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:14:12,611 INFO L168 Benchmark]: TraceAbstraction took 27294.60 ms. Allocated memory was 201.3 MB in the beginning and 633.3 MB in the end (delta: 432.0 MB). Free memory was 169.2 MB in the beginning and 564.6 MB in the end (delta: -395.4 MB). Peak memory consumption was 36.6 MB. Max. memory is 7.1 GB. [2020-07-07 11:14:12,613 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.60 ms. Allocated memory is still 137.9 MB. Free memory was 102.3 MB in the beginning and 93.2 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.44 ms. Allocated memory is still 137.9 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.50 ms. Allocated memory was 137.9 MB in the beginning and 201.3 MB in the end (delta: 63.4 MB). Free memory was 91.9 MB in the beginning and 169.9 MB in the end (delta: -78.1 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 27294.60 ms. Allocated memory was 201.3 MB in the beginning and 633.3 MB in the end (delta: 432.0 MB). Free memory was 169.2 MB in the beginning and 564.6 MB in the end (delta: -395.4 MB). Peak memory consumption was 36.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 25; [L13] int b = 0; VAL [a=25, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=25] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=25, m=0, n=25] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=24, m=1, n=24] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=23, m=2, n=23] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=22, m=3, n=22] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=21, m=4, n=21] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=20, m=5, n=20] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=19, m=6, n=19] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=18, m=7, n=18] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=17, m=8, n=17] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=16, m=9, n=16] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=15, m=10, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=14, m=11, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=13, m=12, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=12, m=13, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=11, m=14, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=10, m=15, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=9, m=16, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=8, m=17, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=7, m=18, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=6, m=19, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=20, \old(n)=5, m=20, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=21, \old(n)=4, m=21, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=22, \old(n)=3, m=22, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=23, \old(n)=2, m=23, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=24, \old(n)=1, m=24, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=25, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=25, \old(n)=0, \result=25, m=25, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1, m=24, n=1, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2, m=23, n=2, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3, m=22, n=3, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4, m=21, n=4, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5, m=20, n=5, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6, m=19, n=6, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7, m=18, n=7, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8, m=17, n=8, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9, m=16, n=9, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10, m=15, n=10, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11, m=14, n=11, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12, m=13, n=12, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13, m=12, n=13, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14, m=11, n=14, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15, m=10, n=15, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16, m=9, n=16, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17, m=8, n=17, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18, m=7, n=18, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19, m=6, n=19, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20, m=5, n=20, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21, m=4, n=21, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22, m=3, n=22, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23, m=2, n=23, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24, m=1, n=24, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=25, m=0, n=25, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) VAL [a=25, b=0, sum(a, b)=25] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=25, b=0, result=25] [L16] __VERIFIER_error() VAL [a=25, b=0, result=25] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 27.1s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 303 SDtfs, 1236 SDslu, 1607 SDs, 0 SdLazy, 1127 SolverSat, 294 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3513 GetRequests, 2789 SyntacticMatches, 0 SemanticMatches, 724 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5200 ImplicationChecksByTransitivity, 8.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 13.8s InterpolantComputationTime, 4400 NumberOfCodeBlocks, 4400 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 4188 ConstructedInterpolants, 0 QuantifiedInterpolants, 1139760 SizeOfPredicates, 348 NumberOfNonLiveVariables, 6288 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 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 incorrect! Received shutdown request...