/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/id_i15_o15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 16:35:05,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:35:05,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:35:05,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:35:05,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:35:05,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:35:05,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:35:05,192 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:35:05,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:35:05,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:35:05,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:35:05,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:35:05,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:35:05,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:35:05,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:35:05,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:35:05,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:35:05,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:35:05,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:35:05,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:35:05,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:35:05,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:35:05,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:35:05,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:35:05,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:35:05,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:35:05,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:35:05,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:35:05,225 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 [2020-08-22 16:35:05,247 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:35:05,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:35:05,249 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:35:05,249 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:35:05,249 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:35:05,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:35:05,250 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:35:05,250 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:35:05,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:35:05,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:35:05,251 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:35:05,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:35:05,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:35:05,251 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:35:05,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:35:05,251 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:35:05,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:35:05,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:35:05,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:35:05,252 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:35:05,252 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:35:05,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:35:05,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:35:05,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:35:05,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:35:05,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:35:05,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:35:05,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:35:05,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:35:05,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:35:05,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:35:05,541 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:35:05,545 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:35:05,546 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:35:05,547 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:35:05,548 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i15_o15-2.c [2020-08-22 16:35:05,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/506d6f407/fff36ee0ef0641ad89a7a848f63f9162/FLAG3336e3b89 [2020-08-22 16:35:06,087 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:35:06,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i15_o15-2.c [2020-08-22 16:35:06,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/506d6f407/fff36ee0ef0641ad89a7a848f63f9162/FLAG3336e3b89 [2020-08-22 16:35:06,450 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/506d6f407/fff36ee0ef0641ad89a7a848f63f9162 [2020-08-22 16:35:06,459 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:35:06,461 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:35:06,462 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:35:06,463 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:35:06,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:35:06,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:35:06" (1/1) ... [2020-08-22 16:35:06,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee2931e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:06, skipping insertion in model container [2020-08-22 16:35:06,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:35:06" (1/1) ... [2020-08-22 16:35:06,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:35:06,503 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:35:06,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:35:06,716 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:35:06,728 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:35:06,743 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:35:06,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:06 WrapperNode [2020-08-22 16:35:06,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:35:06,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:35:06,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:35:06,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:35:06,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:06" (1/1) ... [2020-08-22 16:35:06,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:06" (1/1) ... [2020-08-22 16:35:06,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:06" (1/1) ... [2020-08-22 16:35:06,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:06" (1/1) ... [2020-08-22 16:35:06,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:06" (1/1) ... [2020-08-22 16:35:06,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:06" (1/1) ... [2020-08-22 16:35:06,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:06" (1/1) ... [2020-08-22 16:35:06,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:35:06,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:35:06,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:35:06,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:35:06,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:06" (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 [2020-08-22 16:35:06,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:35:06,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:35:06,904 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 16:35:06,904 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:35:06,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 16:35:06,904 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:35:06,905 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 16:35:06,905 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:35:06,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:35:06,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:35:07,073 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:35:07,073 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:35:07,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:35:07 BoogieIcfgContainer [2020-08-22 16:35:07,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:35:07,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:35:07,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:35:07,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:35:07,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:35:06" (1/3) ... [2020-08-22 16:35:07,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490f64cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:35:07, skipping insertion in model container [2020-08-22 16:35:07,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:35:06" (2/3) ... [2020-08-22 16:35:07,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@490f64cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:35:07, skipping insertion in model container [2020-08-22 16:35:07,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:35:07" (3/3) ... [2020-08-22 16:35:07,085 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i15_o15-2.c [2020-08-22 16:35:07,093 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:35:07,099 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 16:35:07,112 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 16:35:07,136 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:35:07,136 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:35:07,137 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:35:07,137 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:35:07,137 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:35:07,137 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:35:07,137 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:35:07,137 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:35:07,155 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 16:35:07,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:35:07,162 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:07,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:07,164 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:07,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:07,170 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 16:35:07,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:07,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130483065] [2020-08-22 16:35:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:35:07,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130483065] [2020-08-22 16:35:07,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:35:07,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 16:35:07,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482167750] [2020-08-22 16:35:07,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 16:35:07,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:07,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 16:35:07,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 16:35:07,415 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 16:35:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:07,570 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-22 16:35:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 16:35:07,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 16:35:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:07,584 INFO L225 Difference]: With dead ends: 30 [2020-08-22 16:35:07,584 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 16:35:07,587 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 [2020-08-22 16:35:07,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 16:35:07,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 16:35:07,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 16:35:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 16:35:07,634 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 16:35:07,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:07,634 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 16:35:07,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 16:35:07,635 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 16:35:07,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 16:35:07,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:07,637 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:07,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:35:07,638 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:07,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:07,639 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 16:35:07,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:07,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327651516] [2020-08-22 16:35:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:07,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:35:07,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327651516] [2020-08-22 16:35:07,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953770431] [2020-08-22 16:35:07,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:07,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2020-08-22 16:35:07,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 16:35:07,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:07,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-08-22 16:35:07,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902106387] [2020-08-22 16:35:07,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 16:35:07,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:07,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 16:35:07,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 16:35:07,968 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-08-22 16:35:08,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:08,036 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 16:35:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 16:35:08,037 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-08-22 16:35:08,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:08,038 INFO L225 Difference]: With dead ends: 25 [2020-08-22 16:35:08,038 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 16:35:08,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-22 16:35:08,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 16:35:08,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 16:35:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 16:35:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 16:35:08,046 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 16:35:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:08,047 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 16:35:08,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 16:35:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 16:35:08,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 16:35:08,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:08,049 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:08,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-08-22 16:35:08,265 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:08,266 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 16:35:08,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:08,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224279341] [2020-08-22 16:35:08,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:08,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 16:35:08,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224279341] [2020-08-22 16:35:08,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069914781] [2020-08-22 16:35:08,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:08,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:35:08,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:08,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2020-08-22 16:35:08,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:08,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 16:35:08,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:08,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-08-22 16:35:08,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858605216] [2020-08-22 16:35:08,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 16:35:08,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:08,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 16:35:08,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-22 16:35:08,508 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-22 16:35:08,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:08,596 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 16:35:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:35:08,597 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-22 16:35:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:08,598 INFO L225 Difference]: With dead ends: 28 [2020-08-22 16:35:08,598 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 16:35:08,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-22 16:35:08,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 16:35:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 16:35:08,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 16:35:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 16:35:08,606 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 16:35:08,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:08,606 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 16:35:08,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 16:35:08,606 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 16:35:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 16:35:08,607 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:08,608 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:08,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:08,822 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:08,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 16:35:08,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:08,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586487865] [2020-08-22 16:35:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:08,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:08,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:08,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:35:08,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586487865] [2020-08-22 16:35:08,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246057799] [2020-08-22 16:35:08,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-08-22 16:35:09,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-08-22 16:35:09,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:09,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2020-08-22 16:35:09,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 16:35:09,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:09,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2020-08-22 16:35:09,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001139786] [2020-08-22 16:35:09,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 16:35:09,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:09,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 16:35:09,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:35:09,152 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 17 states. [2020-08-22 16:35:09,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:09,334 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 16:35:09,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:35:09,335 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2020-08-22 16:35:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:09,336 INFO L225 Difference]: With dead ends: 31 [2020-08-22 16:35:09,337 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 16:35:09,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:35:09,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 16:35:09,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 16:35:09,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 16:35:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 16:35:09,347 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 16:35:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:09,348 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 16:35:09,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 16:35:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 16:35:09,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 16:35:09,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:09,350 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:09,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:09,566 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:09,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 16:35:09,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:09,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029067750] [2020-08-22 16:35:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 16:35:09,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029067750] [2020-08-22 16:35:09,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683626617] [2020-08-22 16:35:09,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:09,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:35:09,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 12 conjunts are in the unsatisfiable core [2020-08-22 16:35:09,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 16:35:09,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:09,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-08-22 16:35:09,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218637028] [2020-08-22 16:35:09,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 16:35:09,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:09,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 16:35:09,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-22 16:35:09,916 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-08-22 16:35:10,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:10,009 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 16:35:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 16:35:10,011 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-08-22 16:35:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:10,013 INFO L225 Difference]: With dead ends: 34 [2020-08-22 16:35:10,013 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 16:35:10,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-08-22 16:35:10,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 16:35:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 16:35:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 16:35:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 16:35:10,027 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 16:35:10,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:10,028 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 16:35:10,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 16:35:10,028 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 16:35:10,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 16:35:10,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:10,030 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:10,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:10,245 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:10,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:10,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 16:35:10,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:10,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906261620] [2020-08-22 16:35:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 16:35:10,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906261620] [2020-08-22 16:35:10,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65902559] [2020-08-22 16:35:10,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:10,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-08-22 16:35:10,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:10,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 14 conjunts are in the unsatisfiable core [2020-08-22 16:35:10,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 16:35:10,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:10,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 23 [2020-08-22 16:35:10,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187587234] [2020-08-22 16:35:10,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 16:35:10,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:10,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 16:35:10,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-08-22 16:35:10,683 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 23 states. [2020-08-22 16:35:10,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:10,944 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 16:35:10,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:35:10,945 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 43 [2020-08-22 16:35:10,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:10,946 INFO L225 Difference]: With dead ends: 37 [2020-08-22 16:35:10,946 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 16:35:10,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 16:35:10,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 16:35:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 16:35:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 16:35:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 16:35:10,961 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 16:35:10,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:10,962 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 16:35:10,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 16:35:10,962 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 16:35:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 16:35:10,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:10,969 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:11,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-08-22 16:35:11,171 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:11,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:11,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 16:35:11,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:11,172 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638080858] [2020-08-22 16:35:11,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 16:35:11,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638080858] [2020-08-22 16:35:11,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778443652] [2020-08-22 16:35:11,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:11,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-08-22 16:35:11,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:11,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-08-22 16:35:11,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 16:35:11,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:11,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-08-22 16:35:11,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008795796] [2020-08-22 16:35:11,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 16:35:11,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:11,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 16:35:11,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-08-22 16:35:11,504 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-08-22 16:35:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:11,608 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 16:35:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 16:35:11,609 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-22 16:35:11,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:11,610 INFO L225 Difference]: With dead ends: 40 [2020-08-22 16:35:11,611 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 16:35:11,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:35:11,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 16:35:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 16:35:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 16:35:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 16:35:11,617 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 16:35:11,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:11,618 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 16:35:11,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 16:35:11,618 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 16:35:11,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 16:35:11,619 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:11,619 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:11,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:11,821 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 16:35:11,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:11,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564300608] [2020-08-22 16:35:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:11,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 16:35:12,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564300608] [2020-08-22 16:35:12,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356438587] [2020-08-22 16:35:12,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:12,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2020-08-22 16:35:12,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:12,184 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 16:35:12,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:12,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-08-22 16:35:12,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398633499] [2020-08-22 16:35:12,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 16:35:12,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:12,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 16:35:12,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-08-22 16:35:12,187 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-08-22 16:35:12,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:12,339 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 16:35:12,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 16:35:12,340 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-08-22 16:35:12,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:12,344 INFO L225 Difference]: With dead ends: 43 [2020-08-22 16:35:12,345 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 16:35:12,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-08-22 16:35:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 16:35:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 16:35:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 16:35:12,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 16:35:12,362 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 16:35:12,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:12,362 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 16:35:12,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 16:35:12,362 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 16:35:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 16:35:12,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:12,365 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:12,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:12,566 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:12,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 16:35:12,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:12,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516124027] [2020-08-22 16:35:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:12,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 16:35:12,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516124027] [2020-08-22 16:35:12,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854694944] [2020-08-22 16:35:12,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:12,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:35:12,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:12,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-08-22 16:35:12,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 16:35:12,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:12,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-08-22 16:35:12,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76976014] [2020-08-22 16:35:12,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 16:35:12,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:12,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 16:35:12,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-08-22 16:35:12,918 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-08-22 16:35:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:13,052 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 16:35:13,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 16:35:13,053 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-08-22 16:35:13,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:13,054 INFO L225 Difference]: With dead ends: 46 [2020-08-22 16:35:13,054 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 16:35:13,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-08-22 16:35:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 16:35:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 16:35:13,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 16:35:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 16:35:13,064 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 16:35:13,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:13,064 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 16:35:13,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 16:35:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 16:35:13,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 16:35:13,065 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:13,066 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:13,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-08-22 16:35:13,267 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:13,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:13,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 16:35:13,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:13,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591445258] [2020-08-22 16:35:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:13,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 16:35:13,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591445258] [2020-08-22 16:35:13,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400082270] [2020-08-22 16:35:13,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:13,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-08-22 16:35:13,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:13,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2020-08-22 16:35:13,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 16:35:14,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:14,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 35 [2020-08-22 16:35:14,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741992822] [2020-08-22 16:35:14,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 16:35:14,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:14,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 16:35:14,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 16:35:14,200 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 35 states. [2020-08-22 16:35:14,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:14,691 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 16:35:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 16:35:14,696 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 67 [2020-08-22 16:35:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:14,697 INFO L225 Difference]: With dead ends: 49 [2020-08-22 16:35:14,698 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 16:35:14,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 16:35:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 16:35:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 16:35:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 16:35:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 16:35:14,706 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 16:35:14,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:14,706 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 16:35:14,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 16:35:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 16:35:14,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 16:35:14,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:14,708 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:14,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:14,923 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:14,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:14,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 16:35:14,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:14,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803277510] [2020-08-22 16:35:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:14,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 16:35:15,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803277510] [2020-08-22 16:35:15,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109570475] [2020-08-22 16:35:15,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:15,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-08-22 16:35:15,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:15,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 24 conjunts are in the unsatisfiable core [2020-08-22 16:35:15,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 16:35:15,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:15,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-08-22 16:35:15,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911772250] [2020-08-22 16:35:15,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 16:35:15,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:15,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 16:35:15,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-08-22 16:35:15,342 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-08-22 16:35:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:15,509 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 16:35:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 16:35:15,510 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-08-22 16:35:15,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:15,512 INFO L225 Difference]: With dead ends: 52 [2020-08-22 16:35:15,512 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 16:35:15,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-08-22 16:35:15,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 16:35:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 16:35:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 16:35:15,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 16:35:15,520 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 16:35:15,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:15,520 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 16:35:15,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 16:35:15,533 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 16:35:15,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 16:35:15,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:15,538 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:15,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:15,744 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:15,745 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-22 16:35:15,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:15,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836143658] [2020-08-22 16:35:15,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:15,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:15,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 16:35:16,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836143658] [2020-08-22 16:35:16,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875882633] [2020-08-22 16:35:16,079 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:16,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-08-22 16:35:16,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:16,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 26 conjunts are in the unsatisfiable core [2020-08-22 16:35:16,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 16:35:16,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:16,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-08-22 16:35:16,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665792113] [2020-08-22 16:35:16,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 16:35:16,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:16,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 16:35:16,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-08-22 16:35:16,206 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-08-22 16:35:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:16,375 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 16:35:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 16:35:16,376 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-08-22 16:35:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:16,377 INFO L225 Difference]: With dead ends: 55 [2020-08-22 16:35:16,377 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 16:35:16,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-08-22 16:35:16,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 16:35:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 16:35:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 16:35:16,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 16:35:16,384 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 16:35:16,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:16,385 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 16:35:16,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 16:35:16,385 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 16:35:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 16:35:16,386 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:16,386 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:16,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-08-22 16:35:16,599 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:16,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:16,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-22 16:35:16,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:16,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503179884] [2020-08-22 16:35:16,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:16,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 16:35:16,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503179884] [2020-08-22 16:35:16,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275461531] [2020-08-22 16:35:16,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:17,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-08-22 16:35:17,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:17,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 28 conjunts are in the unsatisfiable core [2020-08-22 16:35:17,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:17,652 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 16:35:17,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:17,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 44 [2020-08-22 16:35:17,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697090522] [2020-08-22 16:35:17,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 16:35:17,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:17,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 16:35:17,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1585, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 16:35:17,657 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 44 states. [2020-08-22 16:35:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:18,337 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 16:35:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 16:35:18,341 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 85 [2020-08-22 16:35:18,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:18,342 INFO L225 Difference]: With dead ends: 58 [2020-08-22 16:35:18,342 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 16:35:18,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=864, Invalid=3828, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 16:35:18,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 16:35:18,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 16:35:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 16:35:18,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 16:35:18,351 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 16:35:18,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:18,351 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 16:35:18,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 16:35:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 16:35:18,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 16:35:18,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:18,353 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:18,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-08-22 16:35:18,561 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:18,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:18,562 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-22 16:35:18,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:18,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448366242] [2020-08-22 16:35:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:18,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,174 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 16:35:19,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448366242] [2020-08-22 16:35:19,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078920010] [2020-08-22 16:35:19,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2020-08-22 16:35:19,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 16:35:19,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:19,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-08-22 16:35:19,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292428084] [2020-08-22 16:35:19,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 16:35:19,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:19,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 16:35:19,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-08-22 16:35:19,314 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-08-22 16:35:19,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:19,500 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 16:35:19,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 16:35:19,502 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-08-22 16:35:19,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:19,503 INFO L225 Difference]: With dead ends: 61 [2020-08-22 16:35:19,504 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 16:35:19,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 16:35:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 16:35:19,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 16:35:19,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 16:35:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 16:35:19,519 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 16:35:19,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:19,521 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 16:35:19,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 16:35:19,521 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 16:35:19,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 16:35:19,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:19,524 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:19,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-08-22 16:35:19,738 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:19,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:19,739 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-22 16:35:19,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:19,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362936289] [2020-08-22 16:35:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:35:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 16:35:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:19,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:19,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:20,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 16:35:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:35:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 16:35:20,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362936289] [2020-08-22 16:35:20,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148412243] [2020-08-22 16:35:20,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:20,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-08-22 16:35:20,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-08-22 16:35:20,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2020-08-22 16:35:20,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-08-22 16:35:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 16:35:20,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-08-22 16:35:20,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-08-22 16:35:20,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665600345] [2020-08-22 16:35:20,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 16:35:20,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:35:20,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 16:35:20,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-08-22 16:35:20,414 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-08-22 16:35:20,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:35:20,625 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 16:35:20,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 16:35:20,626 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-08-22 16:35:20,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:35:20,627 INFO L225 Difference]: With dead ends: 64 [2020-08-22 16:35:20,627 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 16:35:20,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 16:35:20,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 16:35:20,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 16:35:20,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 16:35:20,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 16:35:20,643 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 16:35:20,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:35:20,644 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 16:35:20,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 16:35:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 16:35:20,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 16:35:20,646 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:35:20,646 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:35:20,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-08-22 16:35:20,858 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:35:20,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:35:20,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-22 16:35:20,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:35:20,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053736413] [2020-08-22 16:35:20,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:35:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:35:20,874 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:35:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:35:20,888 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:35:20,906 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:35:20,907 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:35:20,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 16:35:20,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:35:20 BoogieIcfgContainer [2020-08-22 16:35:20,948 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:35:20,951 INFO L168 Benchmark]: Toolchain (without parser) took 14489.34 ms. Allocated memory was 139.5 MB in the beginning and 363.9 MB in the end (delta: 224.4 MB). Free memory was 102.7 MB in the beginning and 132.6 MB in the end (delta: -29.9 MB). Peak memory consumption was 194.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:20,952 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 16:35:20,952 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.88 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 93.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:20,953 INFO L168 Benchmark]: Boogie Preprocessor took 26.72 ms. Allocated memory is still 139.5 MB. Free memory was 93.3 MB in the beginning and 91.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:20,954 INFO L168 Benchmark]: RCFGBuilder took 305.23 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 170.4 MB in the end (delta: -78.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:20,954 INFO L168 Benchmark]: TraceAbstraction took 13870.24 ms. Allocated memory was 201.9 MB in the beginning and 363.9 MB in the end (delta: 162.0 MB). Free memory was 169.8 MB in the beginning and 132.6 MB in the end (delta: 37.1 MB). Peak memory consumption was 199.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:35:20,957 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 281.88 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 93.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 26.72 ms. Allocated memory is still 139.5 MB. Free memory was 93.3 MB in the beginning and 91.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 305.23 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 170.4 MB in the end (delta: -78.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13870.24 ms. Allocated memory was 201.9 MB in the beginning and 363.9 MB in the end (delta: 162.0 MB). Free memory was 169.8 MB in the beginning and 132.6 MB in the end (delta: 37.1 MB). Peak memory consumption was 199.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 15; VAL [input=15] [L11] CALL, EXPR id(input) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=15, input=15] [L11] int result = id(input); [L12] COND TRUE result == 15 VAL [input=15, result=15] [L13] __VERIFIER_error() VAL [input=15, result=15] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.7s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 195 SDtfs, 447 SDslu, 1137 SDs, 0 SdLazy, 743 SolverSat, 152 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1382 GetRequests, 993 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 4.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, 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, 15 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 1740 NumberOfCodeBlocks, 1740 NumberOfCodeBlocksAsserted, 81 NumberOfCheckSat, 1608 ConstructedInterpolants, 0 QuantifiedInterpolants, 259752 SizeOfPredicates, 100 NumberOfNonLiveVariables, 1918 ConjunctsInSsa, 266 ConjunctsInUnsatCore, 29 InterpolantComputations, 1 PerfectInterpolantSequences, 3150/6300 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...