/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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/fibo_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 18:14:50,212 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 18:14:50,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 18:14:50,278 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 18:14:50,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 18:14:50,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 18:14:50,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 18:14:50,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 18:14:50,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 18:14:50,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 18:14:50,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 18:14:50,338 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 18:14:50,341 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 18:14:50,343 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 18:14:50,345 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 18:14:50,347 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 18:14:50,359 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 18:14:50,395 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 18:14:50,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 18:14:50,397 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 18:14:50,398 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 [2020-10-23 18:14:50,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 18:14:50,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 18:14:50,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 18:14:50,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 18:14:50,466 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 18:14:50,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 18:14:50,467 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 18:14:50,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 18:14:50,467 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 18:14:50,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 18:14:50,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 18:14:50,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 18:14:50,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 18:14:50,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 18:14:50,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 18:14:50,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 18:14:50,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 18:14:50,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 18:14:50,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 18:14:50,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 18:14:50,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 18:14:50,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 18:14:50,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 18:14:50,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 18:14:50,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 18:14:50,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 18:14:50,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 18:14:50,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 18:14:50,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 18:14:50,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 18:14:50,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 18:14:50,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 18:14:50,972 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 18:14:50,974 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 18:14:50,975 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 18:14:50,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-10-23 18:14:51,058 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa081fb2c/7f2f97b1d83b430a9339d122954743ef/FLAG842bde523 [2020-10-23 18:14:51,813 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 18:14:51,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_5-1.c [2020-10-23 18:14:51,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa081fb2c/7f2f97b1d83b430a9339d122954743ef/FLAG842bde523 [2020-10-23 18:14:52,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fa081fb2c/7f2f97b1d83b430a9339d122954743ef [2020-10-23 18:14:52,145 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 18:14:52,152 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 18:14:52,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 18:14:52,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 18:14:52,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 18:14:52,162 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:14:52" (1/1) ... [2020-10-23 18:14:52,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@545d5065 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:52, skipping insertion in model container [2020-10-23 18:14:52,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 06:14:52" (1/1) ... [2020-10-23 18:14:52,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 18:14:52,196 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 18:14:52,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:14:52,374 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 18:14:52,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 18:14:52,412 INFO L208 MainTranslator]: Completed translation [2020-10-23 18:14:52,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:52 WrapperNode [2020-10-23 18:14:52,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 18:14:52,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 18:14:52,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 18:14:52,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 18:14:52,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:52" (1/1) ... [2020-10-23 18:14:52,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:52" (1/1) ... [2020-10-23 18:14:52,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:52" (1/1) ... [2020-10-23 18:14:52,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:52" (1/1) ... [2020-10-23 18:14:52,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:52" (1/1) ... [2020-10-23 18:14:52,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:52" (1/1) ... [2020-10-23 18:14:52,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:52" (1/1) ... [2020-10-23 18:14:52,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 18:14:52,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 18:14:52,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 18:14:52,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 18:14:52,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:52" (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 [2020-10-23 18:14:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 18:14:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 18:14:52,552 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 18:14:52,553 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-23 18:14:52,553 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 18:14:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 18:14:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 18:14:52,553 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 18:14:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 18:14:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 18:14:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-23 18:14:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 18:14:52,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 18:14:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 18:14:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 18:14:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 18:14:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 18:14:52,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 18:14:52,873 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 18:14:52,874 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 18:14:52,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:14:52 BoogieIcfgContainer [2020-10-23 18:14:52,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 18:14:52,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 18:14:52,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 18:14:52,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 18:14:52,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 06:14:52" (1/3) ... [2020-10-23 18:14:52,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1780190a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:14:52, skipping insertion in model container [2020-10-23 18:14:52,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 06:14:52" (2/3) ... [2020-10-23 18:14:52,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1780190a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 06:14:52, skipping insertion in model container [2020-10-23 18:14:52,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 06:14:52" (3/3) ... [2020-10-23 18:14:52,909 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_5-1.c [2020-10-23 18:14:52,940 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 18:14:52,956 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 18:14:52,998 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 18:14:53,069 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 18:14:53,071 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 18:14:53,072 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 18:14:53,072 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 18:14:53,072 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 18:14:53,072 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 18:14:53,072 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 18:14:53,073 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 18:14:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-23 18:14:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-23 18:14:53,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:53,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:53,111 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:53,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1708859500, now seen corresponding path program 1 times [2020-10-23 18:14:53,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:53,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838921663] [2020-10-23 18:14:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:53,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:53,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:14:53,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838921663] [2020-10-23 18:14:53,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:14:53,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:14:53,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354931788] [2020-10-23 18:14:53,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:14:53,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:53,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:14:53,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:14:53,694 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-10-23 18:14:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:54,062 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-10-23 18:14:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:14:54,064 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-23 18:14:54,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:54,075 INFO L225 Difference]: With dead ends: 41 [2020-10-23 18:14:54,076 INFO L226 Difference]: Without dead ends: 23 [2020-10-23 18:14:54,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:14:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-23 18:14:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-23 18:14:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:14:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-23 18:14:54,143 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2020-10-23 18:14:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:54,144 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-23 18:14:54,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:14:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-23 18:14:54,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-23 18:14:54,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:54,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:54,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 18:14:54,150 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:54,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:54,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2119969838, now seen corresponding path program 1 times [2020-10-23 18:14:54,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:54,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075386846] [2020-10-23 18:14:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:54,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 18:14:54,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075386846] [2020-10-23 18:14:54,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 18:14:54,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 18:14:54,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512388031] [2020-10-23 18:14:54,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 18:14:54,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:54,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 18:14:54,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 18:14:54,272 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 6 states. [2020-10-23 18:14:54,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:54,533 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-10-23 18:14:54,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 18:14:54,534 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-23 18:14:54,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:54,536 INFO L225 Difference]: With dead ends: 30 [2020-10-23 18:14:54,536 INFO L226 Difference]: Without dead ends: 25 [2020-10-23 18:14:54,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-23 18:14:54,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-23 18:14:54,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-10-23 18:14:54,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-23 18:14:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-10-23 18:14:54,548 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2020-10-23 18:14:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:54,549 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-10-23 18:14:54,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 18:14:54,549 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-10-23 18:14:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 18:14:54,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:54,551 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:54,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 18:14:54,551 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:54,552 INFO L82 PathProgramCache]: Analyzing trace with hash -308126725, now seen corresponding path program 1 times [2020-10-23 18:14:54,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:54,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775826277] [2020-10-23 18:14:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-23 18:14:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:14:54,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775826277] [2020-10-23 18:14:54,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914009278] [2020-10-23 18:14:54,692 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 [2020-10-23 18:14:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:54,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:14:54,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:54,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-23 18:14:54,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:54,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2020-10-23 18:14:54,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462373176] [2020-10-23 18:14:54,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 18:14:54,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:54,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 18:14:54,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-23 18:14:54,945 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2020-10-23 18:14:55,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:55,447 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-23 18:14:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 18:14:55,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-23 18:14:55,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:55,451 INFO L225 Difference]: With dead ends: 41 [2020-10-23 18:14:55,451 INFO L226 Difference]: Without dead ends: 25 [2020-10-23 18:14:55,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:14:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-23 18:14:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-23 18:14:55,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-23 18:14:55,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-10-23 18:14:55,463 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 28 [2020-10-23 18:14:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:55,463 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-10-23 18:14:55,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 18:14:55,463 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-10-23 18:14:55,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 18:14:55,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:55,465 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:55,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-23 18:14:55,680 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:55,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:55,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1144313053, now seen corresponding path program 1 times [2020-10-23 18:14:55,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:55,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6719821] [2020-10-23 18:14:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:55,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:55,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:14:55,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6719821] [2020-10-23 18:14:55,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295229948] [2020-10-23 18:14:55,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:55,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-23 18:14:55,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:55,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-23 18:14:55,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:55,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-10-23 18:14:55,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174685334] [2020-10-23 18:14:55,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 18:14:55,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:55,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 18:14:55,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-23 18:14:55,940 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-10-23 18:14:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:56,387 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-10-23 18:14:56,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-23 18:14:56,388 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-23 18:14:56,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:56,390 INFO L225 Difference]: With dead ends: 44 [2020-10-23 18:14:56,390 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 18:14:56,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:14:56,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 18:14:56,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-23 18:14:56,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 18:14:56,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2020-10-23 18:14:56,404 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 29 [2020-10-23 18:14:56,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:56,405 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2020-10-23 18:14:56,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 18:14:56,405 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2020-10-23 18:14:56,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-23 18:14:56,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:56,407 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:56,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:56,623 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:56,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:56,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1249611306, now seen corresponding path program 2 times [2020-10-23 18:14:56,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:56,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601166779] [2020-10-23 18:14:56,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:56,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:56,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:56,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:56,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:56,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:56,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:56,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-23 18:14:56,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601166779] [2020-10-23 18:14:56,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268823905] [2020-10-23 18:14:56,900 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:56,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-23 18:14:56,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:14:56,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:14:56,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-23 18:14:57,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:57,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2020-10-23 18:14:57,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360812443] [2020-10-23 18:14:57,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-23 18:14:57,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:57,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-23 18:14:57,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-23 18:14:57,106 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand 13 states. [2020-10-23 18:14:58,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:14:58,164 INFO L93 Difference]: Finished difference Result 75 states and 112 transitions. [2020-10-23 18:14:58,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 18:14:58,169 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2020-10-23 18:14:58,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:14:58,171 INFO L225 Difference]: With dead ends: 75 [2020-10-23 18:14:58,172 INFO L226 Difference]: Without dead ends: 43 [2020-10-23 18:14:58,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2020-10-23 18:14:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-23 18:14:58,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-23 18:14:58,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-23 18:14:58,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-23 18:14:58,192 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 42 [2020-10-23 18:14:58,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:14:58,192 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-23 18:14:58,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-23 18:14:58,193 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-23 18:14:58,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-23 18:14:58,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:14:58,197 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:14:58,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:14:58,412 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:14:58,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:14:58,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1158728484, now seen corresponding path program 3 times [2020-10-23 18:14:58,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:14:58,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227404943] [2020-10-23 18:14:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:14:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:14:58,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:14:58,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:58,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:14:58,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:14:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:14:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:14:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:14:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-10-23 18:14:58,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227404943] [2020-10-23 18:14:58,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376904188] [2020-10-23 18:14:58,989 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 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 [2020-10-23 18:14:59,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-23 18:14:59,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:14:59,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-23 18:14:59,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:14:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 174 proven. 17 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2020-10-23 18:14:59,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:14:59,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2020-10-23 18:14:59,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777050748] [2020-10-23 18:14:59,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 18:14:59,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:14:59,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 18:14:59,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-23 18:14:59,206 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 14 states. [2020-10-23 18:15:00,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:00,379 INFO L93 Difference]: Finished difference Result 95 states and 139 transitions. [2020-10-23 18:15:00,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:15:00,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 98 [2020-10-23 18:15:00,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:00,383 INFO L225 Difference]: With dead ends: 95 [2020-10-23 18:15:00,383 INFO L226 Difference]: Without dead ends: 58 [2020-10-23 18:15:00,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2020-10-23 18:15:00,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-23 18:15:00,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-10-23 18:15:00,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-23 18:15:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2020-10-23 18:15:00,408 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 98 [2020-10-23 18:15:00,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:00,408 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2020-10-23 18:15:00,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 18:15:00,409 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2020-10-23 18:15:00,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-23 18:15:00,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:00,413 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:00,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:00,628 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:00,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash -73042607, now seen corresponding path program 4 times [2020-10-23 18:15:00,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:00,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077635386] [2020-10-23 18:15:00,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:00,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:00,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:15:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:15:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:15:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:15:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 18:15:00,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:00,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:01,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:01,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:15:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:01,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:15:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:01,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:15:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:01,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:01,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:15:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 193 proven. 313 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-10-23 18:15:01,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077635386] [2020-10-23 18:15:01,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934141655] [2020-10-23 18:15:01,106 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 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 [2020-10-23 18:15:01,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-23 18:15:01,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:15:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-23 18:15:01,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 274 proven. 108 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-23 18:15:01,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:15:01,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 17 [2020-10-23 18:15:01,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505214883] [2020-10-23 18:15:01,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-23 18:15:01,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:01,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-23 18:15:01,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2020-10-23 18:15:01,335 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand 17 states. [2020-10-23 18:15:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:03,418 INFO L93 Difference]: Finished difference Result 130 states and 210 transitions. [2020-10-23 18:15:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-23 18:15:03,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 138 [2020-10-23 18:15:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:03,421 INFO L225 Difference]: With dead ends: 130 [2020-10-23 18:15:03,421 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 18:15:03,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=358, Invalid=1282, Unknown=0, NotChecked=0, Total=1640 [2020-10-23 18:15:03,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 18:15:03,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-10-23 18:15:03,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 18:15:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-10-23 18:15:03,443 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 138 [2020-10-23 18:15:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:03,447 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-10-23 18:15:03,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-23 18:15:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-10-23 18:15:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-23 18:15:03,452 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:03,453 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:03,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-23 18:15:03,658 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:03,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:03,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1296121057, now seen corresponding path program 5 times [2020-10-23 18:15:03,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:03,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238190693] [2020-10-23 18:15:03,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:03,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:03,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:03,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:03,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:03,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:04,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:15:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:15:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:15:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:15:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 18:15:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:04,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:15:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:15:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:04,270 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-23 18:15:04,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238190693] [2020-10-23 18:15:04,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136307923] [2020-10-23 18:15:04,272 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 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 [2020-10-23 18:15:04,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-10-23 18:15:04,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:15:04,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2020-10-23 18:15:04,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-23 18:15:04,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:15:04,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 21 [2020-10-23 18:15:04,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818972815] [2020-10-23 18:15:04,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-23 18:15:04,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:04,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-23 18:15:04,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-23 18:15:04,869 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 21 states. [2020-10-23 18:15:06,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:06,081 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2020-10-23 18:15:06,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-23 18:15:06,081 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 111 [2020-10-23 18:15:06,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:06,086 INFO L225 Difference]: With dead ends: 79 [2020-10-23 18:15:06,086 INFO L226 Difference]: Without dead ends: 74 [2020-10-23 18:15:06,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 148 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 18:15:06,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-23 18:15:06,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-23 18:15:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-23 18:15:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-23 18:15:06,104 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 111 [2020-10-23 18:15:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:06,105 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-23 18:15:06,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-23 18:15:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-23 18:15:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-23 18:15:06,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 18:15:06,108 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 9, 9, 9, 9, 9, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 18:15:06,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:06,322 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 18:15:06,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 18:15:06,323 INFO L82 PathProgramCache]: Analyzing trace with hash 885828711, now seen corresponding path program 6 times [2020-10-23 18:15:06,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 18:15:06,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701387054] [2020-10-23 18:15:06,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 18:15:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 18:15:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 18:15:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:06,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:15:06,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:15:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-23 18:15:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:15:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-23 18:15:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:15:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-10-23 18:15:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-23 18:15:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-23 18:15:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-23 18:15:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 18:15:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 225 proven. 175 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2020-10-23 18:15:06,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701387054] [2020-10-23 18:15:06,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118051343] [2020-10-23 18:15:06,821 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 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 [2020-10-23 18:15:06,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-10-23 18:15:06,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-23 18:15:06,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-23 18:15:06,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-23 18:15:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 933 backedges. 131 proven. 302 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2020-10-23 18:15:07,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-23 18:15:07,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2020-10-23 18:15:07,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672526693] [2020-10-23 18:15:07,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 18:15:07,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 18:15:07,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 18:15:07,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-23 18:15:07,142 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 16 states. [2020-10-23 18:15:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 18:15:08,410 INFO L93 Difference]: Finished difference Result 130 states and 175 transitions. [2020-10-23 18:15:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 18:15:08,411 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 138 [2020-10-23 18:15:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 18:15:08,412 INFO L225 Difference]: With dead ends: 130 [2020-10-23 18:15:08,412 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 18:15:08,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2020-10-23 18:15:08,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 18:15:08,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 18:15:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 18:15:08,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 18:15:08,414 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2020-10-23 18:15:08,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 18:15:08,415 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 18:15:08,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 18:15:08,415 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 18:15:08,415 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 18:15:08,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-23 18:15:08,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 18:15:09,172 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 6 [2020-10-23 18:15:09,864 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 31 [2020-10-23 18:15:09,869 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-10-23 18:15:09,869 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-10-23 18:15:09,869 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-10-23 18:15:09,870 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-23 18:15:09,870 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:15:09,871 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 18:15:09,871 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:15:09,871 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-23 18:15:09,871 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 18:15:09,871 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 18:15:09,871 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-23 18:15:09,872 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 25 32) the Hoare annotation is: true [2020-10-23 18:15:09,872 INFO L270 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: false [2020-10-23 18:15:09,872 INFO L274 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-10-23 18:15:09,872 INFO L274 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2020-10-23 18:15:09,872 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-10-23 18:15:09,872 INFO L274 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-10-23 18:15:09,872 INFO L274 CegarLoopResult]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2020-10-23 18:15:09,873 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 25 32) no Hoare annotation was computed. [2020-10-23 18:15:09,873 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 25 32) no Hoare annotation was computed. [2020-10-23 18:15:09,873 INFO L274 CegarLoopResult]: For program point fiboEXIT(lines 7 15) no Hoare annotation was computed. [2020-10-23 18:15:09,873 INFO L274 CegarLoopResult]: For program point fiboFINAL(lines 7 15) no Hoare annotation was computed. [2020-10-23 18:15:09,873 INFO L270 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 2 |fibo_#in~n|) (= fibo_~n |fibo_#in~n|)) [2020-10-23 18:15:09,873 INFO L274 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-10-23 18:15:09,873 INFO L270 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (or (and (<= |fibo_#t~ret7| 3) (<= 3 |fibo_#t~ret7|)) (<= |fibo_#in~n| 4) (<= 6 |fibo_#in~n|)) (let ((.cse0 (<= |fibo_#t~ret7| 1)) (.cse1 (<= 1 |fibo_#t~ret7|))) (or (<= 5 |fibo_#in~n|) (and .cse0 .cse1 (<= 3 |fibo_#in~n|) (<= |fibo_#in~n| 3)) (and (<= |fibo_#t~ret7| 2) (<= 2 |fibo_#t~ret7|) (<= 4 |fibo_#in~n|)) (and .cse0 (<= 2 |fibo_#in~n|) .cse1 (<= |fibo_#in~n| 2)))) (= fibo_~n |fibo_#in~n|)) [2020-10-23 18:15:09,874 INFO L274 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-10-23 18:15:09,874 INFO L274 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-10-23 18:15:09,874 INFO L274 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-10-23 18:15:09,875 INFO L277 CegarLoopResult]: At program point fiboENTRY(lines 7 15) the Hoare annotation is: true [2020-10-23 18:15:09,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 06:15:09 BoogieIcfgContainer [2020-10-23 18:15:09,883 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 18:15:09,886 INFO L168 Benchmark]: Toolchain (without parser) took 17737.78 ms. Allocated memory was 156.2 MB in the beginning and 339.7 MB in the end (delta: 183.5 MB). Free memory was 131.4 MB in the beginning and 176.4 MB in the end (delta: -45.1 MB). Peak memory consumption was 159.2 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:09,888 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 156.2 MB. Free memory is still 129.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 18:15:09,896 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.95 ms. Allocated memory is still 156.2 MB. Free memory was 130.7 MB in the beginning and 121.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:09,897 INFO L168 Benchmark]: Boogie Preprocessor took 38.04 ms. Allocated memory is still 156.2 MB. Free memory was 121.2 MB in the beginning and 119.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:09,898 INFO L168 Benchmark]: RCFGBuilder took 427.68 ms. Allocated memory is still 156.2 MB. Free memory was 119.8 MB in the beginning and 106.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:09,902 INFO L168 Benchmark]: TraceAbstraction took 16997.89 ms. Allocated memory was 156.2 MB in the beginning and 339.7 MB in the end (delta: 183.5 MB). Free memory was 106.2 MB in the beginning and 176.4 MB in the end (delta: -70.2 MB). Peak memory consumption was 134.1 MB. Max. memory is 8.0 GB. [2020-10-23 18:15:09,908 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 156.2 MB. Free memory is still 129.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 257.95 ms. Allocated memory is still 156.2 MB. Free memory was 130.7 MB in the beginning and 121.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.04 ms. Allocated memory is still 156.2 MB. Free memory was 121.2 MB in the beginning and 119.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 427.68 ms. Allocated memory is still 156.2 MB. Free memory was 119.8 MB in the beginning and 106.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16997.89 ms. Allocated memory was 156.2 MB in the beginning and 339.7 MB in the end (delta: 183.5 MB). Free memory was 106.2 MB in the beginning and 176.4 MB in the end (delta: -70.2 MB). Peak memory consumption was 134.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.5s, OverallIterations: 9, TraceHistogramMax: 19, AutomataDifference: 8.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 203 SDtfs, 494 SDslu, 404 SDs, 0 SdLazy, 1944 SolverSat, 513 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 954 GetRequests, 752 SyntacticMatches, 9 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=73occurred in iteration=8, 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, 9 MinimizatonAttempts, 12 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 141 PreInvPairs, 208 NumberOfFragments, 109 HoareAnnotationTreeSize, 141 FomulaSimplifications, 1865 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 10 FomulaSimplificationsInter, 3190 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 1199 NumberOfCodeBlocks, 1145 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1183 ConstructedInterpolants, 0 QuantifiedInterpolants, 282577 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1572 ConjunctsInSsa, 117 ConjunctsInUnsatCore, 16 InterpolantComputations, 2 PerfectInterpolantSequences, 4370/5870 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...