java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:59:43,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:59:43,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:59:43,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:59:43,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:59:43,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:59:43,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:59:43,349 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:59:43,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:59:43,352 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:59:43,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:59:43,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:59:43,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:59:43,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:59:43,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:59:43,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:59:43,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:59:43,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:59:43,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:59:43,363 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:59:43,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:59:43,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:59:43,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:59:43,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:59:43,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:59:43,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:59:43,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:59:43,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:59:43,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:59:43,376 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:59:43,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:59:43,377 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:59:43,377 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:59:43,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:59:43,378 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:59:43,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:59:43,379 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 [2019-10-14 21:59:43,396 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:59:43,396 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:59:43,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:59:43,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:59:43,399 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:59:43,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:59:43,399 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:59:43,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:59:43,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:59:43,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:59:43,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:59:43,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:59:43,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:59:43,401 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:59:43,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:59:43,402 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:59:43,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:59:43,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:59:43,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:59:43,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:59:43,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:59:43,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:59:43,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:59:43,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:59:43,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:59:43,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:59:43,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:59:43,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:59:43,405 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:59:43,654 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:59:43,664 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:59:43,672 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:59:43,673 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:59:43,674 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:59:43,674 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label51.c [2019-10-14 21:59:43,749 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ebc9c2bb/91a277a515934d83a1bdb8008d6d2f98/FLAG02b6f444d [2019-10-14 21:59:44,370 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:59:44,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label51.c [2019-10-14 21:59:44,391 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ebc9c2bb/91a277a515934d83a1bdb8008d6d2f98/FLAG02b6f444d [2019-10-14 21:59:44,573 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ebc9c2bb/91a277a515934d83a1bdb8008d6d2f98 [2019-10-14 21:59:44,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:59:44,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:59:44,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:44,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:59:44,587 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:59:44,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:44" (1/1) ... [2019-10-14 21:59:44,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22642b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:44, skipping insertion in model container [2019-10-14 21:59:44,591 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:44" (1/1) ... [2019-10-14 21:59:44,598 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:59:44,657 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:59:45,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:45,325 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:59:45,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:45,552 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:59:45,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45 WrapperNode [2019-10-14 21:59:45,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:45,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:59:45,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:59:45,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:59:45,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,610 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,698 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (1/1) ... [2019-10-14 21:59:45,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:59:45,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:59:45,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:59:45,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:59:45,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (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 [2019-10-14 21:59:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:59:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:59:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:59:45,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:59:45,795 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:59:45,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:59:45,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:59:45,795 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:59:45,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:59:45,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:59:45,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:59:47,588 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:59:47,589 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:59:47,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:47 BoogieIcfgContainer [2019-10-14 21:59:47,590 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:59:47,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:59:47,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:59:47,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:59:47,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:59:44" (1/3) ... [2019-10-14 21:59:47,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769a7333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:47, skipping insertion in model container [2019-10-14 21:59:47,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:45" (2/3) ... [2019-10-14 21:59:47,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@769a7333 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:47, skipping insertion in model container [2019-10-14 21:59:47,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:47" (3/3) ... [2019-10-14 21:59:47,601 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label51.c [2019-10-14 21:59:47,612 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:59:47,623 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:59:47,639 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:59:47,672 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:59:47,673 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:59:47,673 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:59:47,673 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:59:47,674 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:59:47,674 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:59:47,674 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:59:47,675 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:59:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-14 21:59:47,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 21:59:47,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:47,712 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:47,713 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:47,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:47,720 INFO L82 PathProgramCache]: Analyzing trace with hash 234227266, now seen corresponding path program 1 times [2019-10-14 21:59:47,730 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:47,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774130029] [2019-10-14 21:59:47,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:47,731 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:47,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:48,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774130029] [2019-10-14 21:59:48,052 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:48,053 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:59:48,053 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682908969] [2019-10-14 21:59:48,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:59:48,058 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:48,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:59:48,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:59:48,074 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-14 21:59:51,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:51,369 INFO L93 Difference]: Finished difference Result 987 states and 1769 transitions. [2019-10-14 21:59:51,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:59:51,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2019-10-14 21:59:51,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:51,393 INFO L225 Difference]: With dead ends: 987 [2019-10-14 21:59:51,394 INFO L226 Difference]: Without dead ends: 626 [2019-10-14 21:59:51,406 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-14 21:59:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 426. [2019-10-14 21:59:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-10-14 21:59:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 611 transitions. [2019-10-14 21:59:51,498 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 611 transitions. Word has length 17 [2019-10-14 21:59:51,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:51,499 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 611 transitions. [2019-10-14 21:59:51,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:59:51,499 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 611 transitions. [2019-10-14 21:59:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 21:59:51,504 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:51,504 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:51,505 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash -904309470, now seen corresponding path program 1 times [2019-10-14 21:59:51,506 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:51,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877942652] [2019-10-14 21:59:51,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:51,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:51,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:51,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:51,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:51,972 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877942652] [2019-10-14 21:59:51,973 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:51,973 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:59:51,973 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709724600] [2019-10-14 21:59:51,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:59:51,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:51,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:59:51,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:59:51,977 INFO L87 Difference]: Start difference. First operand 426 states and 611 transitions. Second operand 9 states. [2019-10-14 21:59:55,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:55,053 INFO L93 Difference]: Finished difference Result 1652 states and 2455 transitions. [2019-10-14 21:59:55,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:59:55,060 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2019-10-14 21:59:55,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:55,071 INFO L225 Difference]: With dead ends: 1652 [2019-10-14 21:59:55,071 INFO L226 Difference]: Without dead ends: 1232 [2019-10-14 21:59:55,073 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:59:55,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2019-10-14 21:59:55,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1203. [2019-10-14 21:59:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1203 states. [2019-10-14 21:59:55,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1683 transitions. [2019-10-14 21:59:55,151 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1683 transitions. Word has length 89 [2019-10-14 21:59:55,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:55,151 INFO L462 AbstractCegarLoop]: Abstraction has 1203 states and 1683 transitions. [2019-10-14 21:59:55,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:59:55,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1683 transitions. [2019-10-14 21:59:55,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-14 21:59:55,155 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:55,155 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:55,156 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:55,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:55,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1508869126, now seen corresponding path program 1 times [2019-10-14 21:59:55,156 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:55,156 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973162043] [2019-10-14 21:59:55,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:55,157 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:55,157 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:55,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:55,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973162043] [2019-10-14 21:59:55,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336921944] [2019-10-14 21:59:55,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:55,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:59:55,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:55,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:59:55,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:55,593 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:55,593 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-14 21:59:55,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249723520] [2019-10-14 21:59:55,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:59:55,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:55,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:59:55,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:55,595 INFO L87 Difference]: Start difference. First operand 1203 states and 1683 transitions. Second operand 5 states. [2019-10-14 21:59:57,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:57,221 INFO L93 Difference]: Finished difference Result 3024 states and 4220 transitions. [2019-10-14 21:59:57,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:59:57,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2019-10-14 21:59:57,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:57,236 INFO L225 Difference]: With dead ends: 3024 [2019-10-14 21:59:57,237 INFO L226 Difference]: Without dead ends: 1827 [2019-10-14 21:59:57,240 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:59:57,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1827 states. [2019-10-14 21:59:57,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1827 to 1797. [2019-10-14 21:59:57,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1797 states. [2019-10-14 21:59:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 2348 transitions. [2019-10-14 21:59:57,321 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 2348 transitions. Word has length 91 [2019-10-14 21:59:57,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:57,323 INFO L462 AbstractCegarLoop]: Abstraction has 1797 states and 2348 transitions. [2019-10-14 21:59:57,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:59:57,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 2348 transitions. [2019-10-14 21:59:57,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 21:59:57,333 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:57,333 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:57,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:57,543 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1685901178, now seen corresponding path program 1 times [2019-10-14 21:59:57,544 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:57,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613012450] [2019-10-14 21:59:57,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:57,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:57,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:57,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:57,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613012450] [2019-10-14 21:59:57,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849767616] [2019-10-14 21:59:57,868 INFO L94 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 [2019-10-14 21:59:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:57,954 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:59:57,960 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:57,995 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:57,996 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2019-10-14 21:59:57,996 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023719439] [2019-10-14 21:59:57,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:59:57,997 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:57,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:59:57,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:57,998 INFO L87 Difference]: Start difference. First operand 1797 states and 2348 transitions. Second operand 3 states. [2019-10-14 21:59:58,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:58,967 INFO L93 Difference]: Finished difference Result 3984 states and 5324 transitions. [2019-10-14 21:59:58,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:59:58,968 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2019-10-14 21:59:58,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:58,981 INFO L225 Difference]: With dead ends: 3984 [2019-10-14 21:59:58,981 INFO L226 Difference]: Without dead ends: 2381 [2019-10-14 21:59:58,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:58,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2019-10-14 21:59:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2180. [2019-10-14 21:59:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2180 states. [2019-10-14 21:59:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 2817 transitions. [2019-10-14 21:59:59,044 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 2817 transitions. Word has length 148 [2019-10-14 21:59:59,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:59,045 INFO L462 AbstractCegarLoop]: Abstraction has 2180 states and 2817 transitions. [2019-10-14 21:59:59,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:59:59,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 2817 transitions. [2019-10-14 21:59:59,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-14 21:59:59,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:59,049 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:59,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:59,253 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:59,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:59,254 INFO L82 PathProgramCache]: Analyzing trace with hash 760632652, now seen corresponding path program 1 times [2019-10-14 21:59:59,254 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:59,255 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236606729] [2019-10-14 21:59:59,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:59,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:59,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:59:59,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236606729] [2019-10-14 21:59:59,610 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207960079] [2019-10-14 21:59:59,610 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:59:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:59,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:59:59,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:59,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:59,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:59,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:59,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:59,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:59,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:59,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:59,808 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:00:02,114 WARN L191 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 16 [2019-10-14 22:00:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 22:00:02,173 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:00:02,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2019-10-14 22:00:02,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357328330] [2019-10-14 22:00:02,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:00:02,175 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:02,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:00:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2019-10-14 22:00:02,175 INFO L87 Difference]: Start difference. First operand 2180 states and 2817 transitions. Second operand 8 states.