/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_10x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:13:10,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:13:10,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:13:10,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:13:10,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:13:10,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:13:10,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:13:10,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:13:10,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:13:10,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:13:10,903 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:13:10,905 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:13:10,905 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:13:10,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:13:10,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:13:10,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:13:10,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:13:10,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:13:10,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:13:10,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:13:10,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:13:10,927 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:13:10,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:13:10,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:13:10,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:13:10,943 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 11:13:10,978 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:13:10,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:13:10,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:13:10,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:13:10,980 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:13:10,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:13:10,984 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:13:10,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:13:10,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:13:10,984 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:13:10,984 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:13:10,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:13:10,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:13:10,985 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:13:10,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:13:10,985 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:13:10,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:13:10,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:13:10,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:13:10,986 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:13:10,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:13:10,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:13:10,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:13:10,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:13:10,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:13:10,989 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:13:10,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:13:10,989 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:13:10,990 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:13:10,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:13:11,266 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:13:11,289 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:13:11,292 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:13:11,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:13:11,294 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:13:11,295 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2020-07-07 11:13:11,370 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2e66393a/005ccdc7f812442db74f7aa959a56701/FLAG42ba3b849 [2020-07-07 11:13:11,811 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:13:11,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2020-07-07 11:13:11,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2e66393a/005ccdc7f812442db74f7aa959a56701/FLAG42ba3b849 [2020-07-07 11:13:12,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2e66393a/005ccdc7f812442db74f7aa959a56701 [2020-07-07 11:13:12,255 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:13:12,257 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:13:12,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:13:12,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:13:12,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:13:12,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:13:12" (1/1) ... [2020-07-07 11:13:12,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72978ab9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:12, skipping insertion in model container [2020-07-07 11:13:12,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:13:12" (1/1) ... [2020-07-07 11:13:12,274 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:13:12,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:13:12,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:13:12,453 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:13:12,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:13:12,478 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:13:12,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:12 WrapperNode [2020-07-07 11:13:12,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:13:12,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:13:12,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:13:12,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:13:12,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:12" (1/1) ... [2020-07-07 11:13:12,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:12" (1/1) ... [2020-07-07 11:13:12,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:12" (1/1) ... [2020-07-07 11:13:12,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:12" (1/1) ... [2020-07-07 11:13:12,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:12" (1/1) ... [2020-07-07 11:13:12,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:12" (1/1) ... [2020-07-07 11:13:12,500 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:12" (1/1) ... [2020-07-07 11:13:12,502 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:13:12,502 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:13:12,502 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:13:12,502 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:13:12,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:12" (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 11:13:12,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:13:12,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:13:12,663 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-07 11:13:12,663 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:13:12,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:13:12,663 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-07 11:13:12,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:13:12,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:13:12,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:13:12,817 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:13:12,817 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:13:12,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:13:12 BoogieIcfgContainer [2020-07-07 11:13:12,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:13:12,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:13:12,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:13:12,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:13:12,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:13:12" (1/3) ... [2020-07-07 11:13:12,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d05924f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:13:12, skipping insertion in model container [2020-07-07 11:13:12,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:12" (2/3) ... [2020-07-07 11:13:12,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d05924f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:13:12, skipping insertion in model container [2020-07-07 11:13:12,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:13:12" (3/3) ... [2020-07-07 11:13:12,829 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_10x0-2.c [2020-07-07 11:13:12,840 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:13:12,848 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:13:12,863 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:13:12,911 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:13:12,912 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:13:12,912 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:13:12,912 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:13:12,912 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:13:12,913 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:13:12,913 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:13:12,913 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:13:12,936 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-07 11:13:12,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:13:12,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:12,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:12,945 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:12,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:12,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-07 11:13:12,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:12,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860882865] [2020-07-07 11:13:12,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:13,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:13,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:13,169 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 11:13:13,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860882865] [2020-07-07 11:13:13,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:13:13,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:13:13,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791522253] [2020-07-07 11:13:13,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:13:13,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:13,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:13:13,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:13:13,188 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-07 11:13:13,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:13,282 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-07 11:13:13,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:13:13,284 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:13:13,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:13,293 INFO L225 Difference]: With dead ends: 30 [2020-07-07 11:13:13,293 INFO L226 Difference]: Without dead ends: 18 [2020-07-07 11:13:13,296 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 11:13:13,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-07 11:13:13,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-07 11:13:13,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-07 11:13:13,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-07 11:13:13,334 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-07 11:13:13,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:13,334 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-07 11:13:13,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:13:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-07 11:13:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 11:13:13,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:13,337 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 11:13:13,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:13:13,338 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:13,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:13,338 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-07 11:13:13,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:13,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980857043] [2020-07-07 11:13:13,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:13,474 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 11:13:13,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980857043] [2020-07-07 11:13:13,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224153087] [2020-07-07 11:13:13,475 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 11:13:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:13,513 INFO L264 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:13:13,520 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:13,576 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 11:13:13,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:13,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-07 11:13:13,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613861580] [2020-07-07 11:13:13,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:13:13,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:13,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:13:13,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:13:13,581 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-07 11:13:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:13,645 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-07 11:13:13,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:13:13,645 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-07 11:13:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:13,647 INFO L225 Difference]: With dead ends: 25 [2020-07-07 11:13:13,647 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 11:13:13,648 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 11:13:13,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 11:13:13,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-07 11:13:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:13:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-07 11:13:13,655 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-07 11:13:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:13,656 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-07 11:13:13,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:13:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-07 11:13:13,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 11:13:13,657 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:13,657 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 11:13:13,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:13:13,859 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:13,860 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-07 11:13:13,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:13,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823196350] [2020-07-07 11:13:13,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:13,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:14,004 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 11:13:14,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823196350] [2020-07-07 11:13:14,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745224956] [2020-07-07 11:13:14,006 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 11:13:14,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:13:14,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:14,040 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:13:14,042 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:14,071 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 11:13:14,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:14,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-07 11:13:14,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353715838] [2020-07-07 11:13:14,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:13:14,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:14,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:13:14,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:13:14,074 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-07 11:13:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:14,144 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-07 11:13:14,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:13:14,144 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-07 11:13:14,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:14,146 INFO L225 Difference]: With dead ends: 28 [2020-07-07 11:13:14,146 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 11:13:14,147 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 11:13:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 11:13:14,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-07 11:13:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 11:13:14,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-07 11:13:14,153 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-07 11:13:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:14,154 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-07 11:13:14,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:13:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-07 11:13:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:13:14,156 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:14,156 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 11:13:14,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:14,371 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:14,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:14,372 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-07 11:13:14,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:14,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840760323] [2020-07-07 11:13:14,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:14,584 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 11:13:14,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840760323] [2020-07-07 11:13:14,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048703307] [2020-07-07 11:13:14,585 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 11:13:14,618 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:13:14,619 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:14,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:13:14,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:14,646 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 11:13:14,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:14,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-07 11:13:14,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543321482] [2020-07-07 11:13:14,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:13:14,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:14,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:13:14,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:13:14,649 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-07 11:13:14,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:14,725 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-07 11:13:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:13:14,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-07 11:13:14,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:14,727 INFO L225 Difference]: With dead ends: 31 [2020-07-07 11:13:14,727 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 11:13:14,727 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 11:13:14,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 11:13:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-07 11:13:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:13:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-07 11:13:14,734 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-07 11:13:14,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:14,734 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-07 11:13:14,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:13:14,734 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-07 11:13:14,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:13:14,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:14,736 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 11:13:14,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:14,952 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:14,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:14,953 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-07 11:13:14,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:14,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107251899] [2020-07-07 11:13:14,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:14,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,122 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 11:13:15,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107251899] [2020-07-07 11:13:15,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302152879] [2020-07-07 11:13:15,123 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 11:13:15,151 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:13:15,151 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:15,152 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:13:15,155 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:15,181 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 11:13:15,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:15,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-07 11:13:15,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384168588] [2020-07-07 11:13:15,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:13:15,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:15,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:13:15,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:13:15,184 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-07 11:13:15,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:15,269 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-07 11:13:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:13:15,269 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-07 11:13:15,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:15,271 INFO L225 Difference]: With dead ends: 34 [2020-07-07 11:13:15,271 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:13:15,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:13:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:13:15,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 11:13:15,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:13:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-07 11:13:15,278 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-07 11:13:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:15,278 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-07 11:13:15,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:13:15,279 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-07 11:13:15,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 11:13:15,280 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:15,280 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 11:13:15,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:15,495 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:15,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:15,495 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-07 11:13:15,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:15,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486050190] [2020-07-07 11:13:15,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:15,746 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 11:13:15,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486050190] [2020-07-07 11:13:15,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562309715] [2020-07-07 11:13:15,749 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 11:13:15,808 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-07 11:13:15,808 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:15,810 INFO L264 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:13:15,816 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:15,876 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 11:13:15,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:15,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-07 11:13:15,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728738877] [2020-07-07 11:13:15,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:13:15,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:15,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:13:15,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:13:15,882 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-07 11:13:15,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:15,984 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-07 11:13:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:13:15,984 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-07 11:13:15,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:15,985 INFO L225 Difference]: With dead ends: 37 [2020-07-07 11:13:15,986 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 11:13:15,988 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 11:13:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 11:13:15,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-07 11:13:15,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:13:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-07 11:13:15,996 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-07 11:13:15,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:15,997 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-07 11:13:15,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:13:15,998 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-07 11:13:16,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 11:13:16,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:16,004 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 11:13:16,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 11:13:16,219 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:16,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:16,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-07 11:13:16,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:16,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847192651] [2020-07-07 11:13:16,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,403 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 11:13:16,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847192651] [2020-07-07 11:13:16,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909351] [2020-07-07 11:13:16,404 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 11:13:16,445 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-07 11:13:16,445 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:16,447 INFO L264 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-07 11:13:16,450 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:16,479 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 11:13:16,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:16,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-07 11:13:16,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473744599] [2020-07-07 11:13:16,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:13:16,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:16,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:13:16,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:13:16,481 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-07 11:13:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:16,584 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-07 11:13:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:13:16,585 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-07 11:13:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:16,586 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:13:16,586 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:13:16,587 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 11:13:16,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:13:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-07 11:13:16,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:13:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-07 11:13:16,593 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-07 11:13:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:16,594 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-07 11:13:16,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:13:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-07 11:13:16,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 11:13:16,595 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:16,595 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 11:13:16,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:16,808 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-07 11:13:16,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:16,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304896133] [2020-07-07 11:13:16,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,048 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 11:13:17,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304896133] [2020-07-07 11:13:17,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699296418] [2020-07-07 11:13:17,049 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 11:13:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,099 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-07 11:13:17,102 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:17,133 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 11:13:17,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:17,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-07 11:13:17,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913837980] [2020-07-07 11:13:17,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:13:17,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:17,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:13:17,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:13:17,135 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-07 11:13:17,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:17,250 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-07 11:13:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:13:17,251 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-07 11:13:17,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:17,252 INFO L225 Difference]: With dead ends: 43 [2020-07-07 11:13:17,252 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:13:17,253 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 11:13:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:13:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-07 11:13:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:13:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-07 11:13:17,259 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-07 11:13:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:17,259 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-07 11:13:17,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:13:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-07 11:13:17,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-07 11:13:17,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:17,261 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 11:13:17,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:17,475 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:17,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-07 11:13:17,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:17,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678416869] [2020-07-07 11:13:17,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:17,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,764 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 11:13:17,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678416869] [2020-07-07 11:13:17,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318851066] [2020-07-07 11:13:17,765 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 11:13:17,823 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:13:17,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:17,825 INFO L264 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-07 11:13:17,828 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:17,861 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 11:13:17,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:17,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-07 11:13:17,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411616371] [2020-07-07 11:13:17,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:13:17,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:17,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:13:17,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:13:17,863 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-07 11:13:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:17,989 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-07 11:13:17,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:13:17,990 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-07 11:13:17,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:17,991 INFO L225 Difference]: With dead ends: 46 [2020-07-07 11:13:17,991 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 11:13:17,992 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 11:13:17,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 11:13:17,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-07 11:13:17,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 11:13:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-07 11:13:17,998 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-07 11:13:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:17,999 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-07 11:13:17,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:13:17,999 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-07 11:13:18,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-07 11:13:18,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:18,001 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 11:13:18,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 11:13:18,204 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:18,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:18,205 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-07 11:13:18,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:18,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025126783] [2020-07-07 11:13:18,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,555 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 11:13:18,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025126783] [2020-07-07 11:13:18,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699312250] [2020-07-07 11:13:18,556 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 11:13:18,599 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-07 11:13:18,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:18,600 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-07 11:13:18,603 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:18,638 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 11:13:18,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:18,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-07 11:13:18,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499637755] [2020-07-07 11:13:18,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:13:18,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:18,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:13:18,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:13:18,641 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-07 11:13:18,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:18,787 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-07 11:13:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 11:13:18,788 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-07 11:13:18,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:18,789 INFO L225 Difference]: With dead ends: 49 [2020-07-07 11:13:18,790 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 11:13:18,791 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 11:13:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 11:13:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-07 11:13:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 11:13:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-07 11:13:18,808 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-07 11:13:18,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:18,809 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-07 11:13:18,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:13:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-07 11:13:18,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-07 11:13:18,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:18,810 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 11:13:19,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:19,012 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:19,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:19,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-07 11:13:19,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:19,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383596371] [2020-07-07 11:13:19,013 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:13:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:13:19,062 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:13:19,063 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:13:19,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 11:13:19,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:13:19 BoogieIcfgContainer [2020-07-07 11:13:19,099 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:13:19,101 INFO L168 Benchmark]: Toolchain (without parser) took 6844.52 ms. Allocated memory was 144.7 MB in the beginning and 283.1 MB in the end (delta: 138.4 MB). Free memory was 102.9 MB in the beginning and 239.1 MB in the end (delta: -136.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:19,102 INFO L168 Benchmark]: CDTParser took 1.43 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 11:13:19,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 221.48 ms. Allocated memory is still 144.7 MB. Free memory was 102.5 MB in the beginning and 93.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:19,103 INFO L168 Benchmark]: Boogie Preprocessor took 22.18 ms. Allocated memory is still 144.7 MB. Free memory was 93.3 MB in the beginning and 92.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:19,104 INFO L168 Benchmark]: RCFGBuilder took 318.89 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 92.0 MB in the beginning and 170.2 MB in the end (delta: -78.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:19,105 INFO L168 Benchmark]: TraceAbstraction took 6276.84 ms. Allocated memory was 202.4 MB in the beginning and 283.1 MB in the end (delta: 80.7 MB). Free memory was 170.2 MB in the beginning and 239.1 MB in the end (delta: -68.9 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:19,108 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.43 ms. Allocated memory is still 144.7 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 221.48 ms. Allocated memory is still 144.7 MB. Free memory was 102.5 MB in the beginning and 93.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.18 ms. Allocated memory is still 144.7 MB. Free memory was 93.3 MB in the beginning and 92.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.89 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 92.0 MB in the beginning and 170.2 MB in the end (delta: -78.2 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6276.84 ms. Allocated memory was 202.4 MB in the beginning and 283.1 MB in the end (delta: 80.7 MB). Free memory was 170.2 MB in the beginning and 239.1 MB in the end (delta: -68.9 MB). Peak memory consumption was 11.8 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 = 10; [L13] int b = 0; VAL [a=10, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=10, m=0, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=9, m=1, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=8, m=2, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=7, m=3, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=6, m=4, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=5, m=5, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=4, m=6, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=3, m=7, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=2, m=8, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=1, m=9, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=10, \old(n)=0, \result=10, m=10, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1, m=9, n=1, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2, m=8, n=2, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3, m=7, n=3, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4, m=6, n=4, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5, m=5, n=5, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6, m=4, n=6, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7, m=3, n=7, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8, m=2, n=8, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9, m=1, n=9, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=10, m=0, n=10, sum(n - 1, m + 1)=10] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) VAL [a=10, b=0, sum(a, b)=10] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=10, b=0, result=10] [L16] __VERIFIER_error() VAL [a=10, b=0, result=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.1s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 123 SDtfs, 247 SDslu, 443 SDs, 0 SdLazy, 330 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 648 GetRequests, 509 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 860 NumberOfCodeBlocks, 855 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 768 ConstructedInterpolants, 0 QuantifiedInterpolants, 87360 SizeOfPredicates, 63 NumberOfNonLiveVariables, 1123 ConjunctsInSsa, 126 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 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...