/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:01:00,206 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:01:00,209 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:01:00,226 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:01:00,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:01:00,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:01:00,283 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:01:00,284 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 [2019-11-06 19:01:00,315 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:01:00,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:01:00,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:01:00,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:01:00,320 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:01:00,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:01:00,321 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:01:00,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:01:00,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:01:00,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:01:00,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:01:00,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:01:00,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:01:00,324 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:01:00,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:01:00,324 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:01:00,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:01:00,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:01:00,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:01:00,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:01:00,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:01:00,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:01:00,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:01:00,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:01:00,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:01:00,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:01:00,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:01:00,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:01:00,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:01:00,587 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:01:00,600 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:01:00,604 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:01:00,605 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:01:00,606 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:01:00,606 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2019-11-06 19:01:00,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01e8ac6e/5e87c9050f784322bc9cbcf058a0d7d8/FLAGc2fe8b54e [2019-11-06 19:01:01,380 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:01:01,381 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2019-11-06 19:01:01,399 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01e8ac6e/5e87c9050f784322bc9cbcf058a0d7d8/FLAGc2fe8b54e [2019-11-06 19:01:01,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f01e8ac6e/5e87c9050f784322bc9cbcf058a0d7d8 [2019-11-06 19:01:01,523 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:01:01,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:01:01,529 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:01:01,530 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:01:01,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:01:01,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:01:01" (1/1) ... [2019-11-06 19:01:01,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bcc3485 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:01, skipping insertion in model container [2019-11-06 19:01:01,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:01:01" (1/1) ... [2019-11-06 19:01:01,548 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:01:01,635 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:01:02,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:01:02,402 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:01:02,805 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:01:02,837 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:01:02,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:02 WrapperNode [2019-11-06 19:01:02,839 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:01:02,840 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:01:02,840 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:01:02,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:01:02,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:02" (1/1) ... [2019-11-06 19:01:02,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:02" (1/1) ... [2019-11-06 19:01:02,900 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:02" (1/1) ... [2019-11-06 19:01:02,904 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:02" (1/1) ... [2019-11-06 19:01:02,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:02" (1/1) ... [2019-11-06 19:01:02,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:02" (1/1) ... [2019-11-06 19:01:02,994 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:02" (1/1) ... [2019-11-06 19:01:03,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:01:03,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:01:03,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:01:03,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:01:03,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:02" (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 [2019-11-06 19:01:03,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:01:03,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:01:03,062 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:01:03,062 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:01:03,062 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:01:03,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:01:03,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:01:03,063 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:01:03,063 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:01:03,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:01:03,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:01:05,069 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:01:05,069 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:01:05,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:01:05 BoogieIcfgContainer [2019-11-06 19:01:05,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:01:05,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:01:05,078 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:01:05,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:01:05,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:01:01" (1/3) ... [2019-11-06 19:01:05,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7104b08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:01:05, skipping insertion in model container [2019-11-06 19:01:05,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:01:02" (2/3) ... [2019-11-06 19:01:05,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7104b08a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:01:05, skipping insertion in model container [2019-11-06 19:01:05,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:01:05" (3/3) ... [2019-11-06 19:01:05,090 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label31.c [2019-11-06 19:01:05,106 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:01:05,122 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:01:05,136 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:01:05,189 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:01:05,189 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:01:05,190 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:01:05,190 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:01:05,191 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:01:05,191 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:01:05,191 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:01:05,191 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:01:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 19:01:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-06 19:01:05,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:05,264 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:01:05,266 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:05,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:05,272 INFO L82 PathProgramCache]: Analyzing trace with hash -181884296, now seen corresponding path program 1 times [2019-11-06 19:01:05,282 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:05,282 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867904026] [2019-11-06 19:01:05,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:06,191 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:06,355 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867904026] [2019-11-06 19:01:06,356 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:06,356 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:01:06,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884037056] [2019-11-06 19:01:06,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:01:06,365 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:06,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:01:06,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:01:06,383 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-11-06 19:01:06,590 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:06,909 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-11-06 19:01:10,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:10,538 INFO L93 Difference]: Finished difference Result 1093 states and 1965 transitions. [2019-11-06 19:01:10,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:01:10,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-11-06 19:01:10,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:10,562 INFO L225 Difference]: With dead ends: 1093 [2019-11-06 19:01:10,562 INFO L226 Difference]: Without dead ends: 700 [2019-11-06 19:01:10,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:01:10,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-11-06 19:01:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 465. [2019-11-06 19:01:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-11-06 19:01:10,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 759 transitions. [2019-11-06 19:01:10,661 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 759 transitions. Word has length 157 [2019-11-06 19:01:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:10,663 INFO L462 AbstractCegarLoop]: Abstraction has 465 states and 759 transitions. [2019-11-06 19:01:10,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:01:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 759 transitions. [2019-11-06 19:01:10,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-11-06 19:01:10,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:10,669 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:01:10,669 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:10,670 INFO L82 PathProgramCache]: Analyzing trace with hash 752192065, now seen corresponding path program 1 times [2019-11-06 19:01:10,670 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:10,670 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262089538] [2019-11-06 19:01:10,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:10,876 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:11,030 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262089538] [2019-11-06 19:01:11,030 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:11,030 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:01:11,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38894163] [2019-11-06 19:01:11,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:01:11,033 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:11,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:01:11,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:01:11,033 INFO L87 Difference]: Start difference. First operand 465 states and 759 transitions. Second operand 8 states. [2019-11-06 19:01:11,202 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:11,560 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:11,951 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:01:15,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:15,851 INFO L93 Difference]: Finished difference Result 1808 states and 3026 transitions. [2019-11-06 19:01:15,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:01:15,852 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 167 [2019-11-06 19:01:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:15,864 INFO L225 Difference]: With dead ends: 1808 [2019-11-06 19:01:15,865 INFO L226 Difference]: Without dead ends: 1349 [2019-11-06 19:01:15,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:01:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2019-11-06 19:01:15,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 905. [2019-11-06 19:01:15,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-11-06 19:01:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1402 transitions. [2019-11-06 19:01:15,965 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1402 transitions. Word has length 167 [2019-11-06 19:01:15,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:15,965 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1402 transitions. [2019-11-06 19:01:15,965 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:01:15,966 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1402 transitions. [2019-11-06 19:01:15,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-06 19:01:15,976 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:15,977 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:01:15,978 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:15,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:15,979 INFO L82 PathProgramCache]: Analyzing trace with hash 519491724, now seen corresponding path program 1 times [2019-11-06 19:01:15,979 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:15,980 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014432769] [2019-11-06 19:01:15,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:16,345 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:16,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:16,579 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014432769] [2019-11-06 19:01:16,579 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645448665] [2019-11-06 19:01:16,580 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 [2019-11-06 19:01:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:16,976 INFO L256 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:01:16,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:17,101 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:17,101 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-11-06 19:01:17,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192215052] [2019-11-06 19:01:17,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:01:17,111 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:17,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:01:17,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:01:17,112 INFO L87 Difference]: Start difference. First operand 905 states and 1402 transitions. Second operand 3 states. [2019-11-06 19:01:18,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:18,222 INFO L93 Difference]: Finished difference Result 2650 states and 4183 transitions. [2019-11-06 19:01:18,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:01:18,222 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2019-11-06 19:01:18,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:18,235 INFO L225 Difference]: With dead ends: 2650 [2019-11-06 19:01:18,236 INFO L226 Difference]: Without dead ends: 1751 [2019-11-06 19:01:18,240 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:01:18,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2019-11-06 19:01:18,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1537. [2019-11-06 19:01:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1537 states. [2019-11-06 19:01:18,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2157 transitions. [2019-11-06 19:01:18,307 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2157 transitions. Word has length 169 [2019-11-06 19:01:18,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:18,308 INFO L462 AbstractCegarLoop]: Abstraction has 1537 states and 2157 transitions. [2019-11-06 19:01:18,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:01:18,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2157 transitions. [2019-11-06 19:01:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-11-06 19:01:18,317 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:18,318 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:01:18,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:18,525 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:18,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:18,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1544066575, now seen corresponding path program 1 times [2019-11-06 19:01:18,527 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:18,527 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729275950] [2019-11-06 19:01:18,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:18,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:18,895 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:19,169 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729275950] [2019-11-06 19:01:19,170 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:01:19,170 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:01:19,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277651914] [2019-11-06 19:01:19,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:01:19,171 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:19,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:01:19,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:19,172 INFO L87 Difference]: Start difference. First operand 1537 states and 2157 transitions. Second operand 9 states. [2019-11-06 19:01:19,325 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:20,040 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-11-06 19:01:22,739 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-11-06 19:01:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:23,970 INFO L93 Difference]: Finished difference Result 6180 states and 9213 transitions. [2019-11-06 19:01:23,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:01:23,971 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 218 [2019-11-06 19:01:23,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:24,008 INFO L225 Difference]: With dead ends: 6180 [2019-11-06 19:01:24,010 INFO L226 Difference]: Without dead ends: 4649 [2019-11-06 19:01:24,017 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:01:24,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2019-11-06 19:01:24,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4164. [2019-11-06 19:01:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4164 states. [2019-11-06 19:01:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4164 states to 4164 states and 5670 transitions. [2019-11-06 19:01:24,206 INFO L78 Accepts]: Start accepts. Automaton has 4164 states and 5670 transitions. Word has length 218 [2019-11-06 19:01:24,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:24,206 INFO L462 AbstractCegarLoop]: Abstraction has 4164 states and 5670 transitions. [2019-11-06 19:01:24,206 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:01:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 4164 states and 5670 transitions. [2019-11-06 19:01:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-11-06 19:01:24,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:24,220 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 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] [2019-11-06 19:01:24,221 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:24,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash 661081392, now seen corresponding path program 1 times [2019-11-06 19:01:24,221 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:24,222 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487161500] [2019-11-06 19:01:24,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:24,476 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 90 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:01:24,879 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487161500] [2019-11-06 19:01:24,879 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346764860] [2019-11-06 19:01:24,880 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 [2019-11-06 19:01:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:25,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:01:25,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:25,305 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-06 19:01:25,306 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:25,306 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-11-06 19:01:25,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034050506] [2019-11-06 19:01:25,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:01:25,307 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:25,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:01:25,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:01:25,308 INFO L87 Difference]: Start difference. First operand 4164 states and 5670 transitions. Second operand 5 states. [2019-11-06 19:01:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:26,723 INFO L93 Difference]: Finished difference Result 12541 states and 18043 transitions. [2019-11-06 19:01:26,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:01:26,724 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 253 [2019-11-06 19:01:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:26,769 INFO L225 Difference]: With dead ends: 12541 [2019-11-06 19:01:26,769 INFO L226 Difference]: Without dead ends: 8383 [2019-11-06 19:01:26,783 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:01:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8383 states. [2019-11-06 19:01:27,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8383 to 8069. [2019-11-06 19:01:27,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8069 states. [2019-11-06 19:01:27,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 10860 transitions. [2019-11-06 19:01:27,133 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 10860 transitions. Word has length 253 [2019-11-06 19:01:27,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:27,135 INFO L462 AbstractCegarLoop]: Abstraction has 8069 states and 10860 transitions. [2019-11-06 19:01:27,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:01:27,136 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 10860 transitions. [2019-11-06 19:01:27,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2019-11-06 19:01:27,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:27,167 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:01:27,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:27,384 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:27,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:27,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1003600938, now seen corresponding path program 1 times [2019-11-06 19:01:27,389 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:27,391 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884169863] [2019-11-06 19:01:27,391 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:27,740 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 93 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:28,091 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884169863] [2019-11-06 19:01:28,092 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129325589] [2019-11-06 19:01:28,092 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 [2019-11-06 19:01:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:28,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:01:28,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:01:28,483 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:28,483 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-11-06 19:01:28,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790370857] [2019-11-06 19:01:28,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:01:28,485 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:28,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:01:28,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:01:28,485 INFO L87 Difference]: Start difference. First operand 8069 states and 10860 transitions. Second operand 3 states. [2019-11-06 19:01:29,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:29,736 INFO L93 Difference]: Finished difference Result 19949 states and 27733 transitions. [2019-11-06 19:01:29,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:01:29,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 257 [2019-11-06 19:01:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:29,798 INFO L225 Difference]: With dead ends: 19949 [2019-11-06 19:01:29,799 INFO L226 Difference]: Without dead ends: 11886 [2019-11-06 19:01:29,819 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:01:29,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2019-11-06 19:01:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 11883. [2019-11-06 19:01:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11883 states. [2019-11-06 19:01:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11883 states to 11883 states and 16353 transitions. [2019-11-06 19:01:30,162 INFO L78 Accepts]: Start accepts. Automaton has 11883 states and 16353 transitions. Word has length 257 [2019-11-06 19:01:30,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:30,163 INFO L462 AbstractCegarLoop]: Abstraction has 11883 states and 16353 transitions. [2019-11-06 19:01:30,163 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:01:30,164 INFO L276 IsEmpty]: Start isEmpty. Operand 11883 states and 16353 transitions. [2019-11-06 19:01:30,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2019-11-06 19:01:30,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:30,214 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-11-06 19:01:30,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:30,419 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:30,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:30,420 INFO L82 PathProgramCache]: Analyzing trace with hash -2045887005, now seen corresponding path program 1 times [2019-11-06 19:01:30,421 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:30,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728291565] [2019-11-06 19:01:30,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:30,727 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:30,886 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-11-06 19:01:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:01:31,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728291565] [2019-11-06 19:01:31,112 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855370743] [2019-11-06 19:01:31,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 19:01:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:31,349 INFO L256 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:01:31,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:01:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-06 19:01:31,442 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:01:31,442 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-06 19:01:31,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245553482] [2019-11-06 19:01:31,443 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:01:31,443 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:01:31,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:01:31,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:31,444 INFO L87 Difference]: Start difference. First operand 11883 states and 16353 transitions. Second operand 3 states. [2019-11-06 19:01:32,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:01:32,869 INFO L93 Difference]: Finished difference Result 34707 states and 48209 transitions. [2019-11-06 19:01:32,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:01:32,869 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 299 [2019-11-06 19:01:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:01:32,958 INFO L225 Difference]: With dead ends: 34707 [2019-11-06 19:01:32,958 INFO L226 Difference]: Without dead ends: 22830 [2019-11-06 19:01:32,986 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:01:33,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22830 states. [2019-11-06 19:01:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22830 to 22590. [2019-11-06 19:01:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22590 states. [2019-11-06 19:01:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22590 states to 22590 states and 31099 transitions. [2019-11-06 19:01:33,596 INFO L78 Accepts]: Start accepts. Automaton has 22590 states and 31099 transitions. Word has length 299 [2019-11-06 19:01:33,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:01:33,597 INFO L462 AbstractCegarLoop]: Abstraction has 22590 states and 31099 transitions. [2019-11-06 19:01:33,597 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:01:33,597 INFO L276 IsEmpty]: Start isEmpty. Operand 22590 states and 31099 transitions. [2019-11-06 19:01:33,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-11-06 19:01:33,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:01:33,668 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-11-06 19:01:33,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:01:33,873 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:01:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:01:33,874 INFO L82 PathProgramCache]: Analyzing trace with hash -58068566, now seen corresponding path program 1 times [2019-11-06 19:01:33,874 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:01:33,874 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791286982] [2019-11-06 19:01:33,875 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:01:33,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:01:34,128 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-06 19:01:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat