/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/Problem11_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:08:33,647 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:08:33,650 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:08:33,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:08:33,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:08:33,663 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:08:33,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:08:33,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:08:33,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:08:33,669 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:08:33,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:08:33,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:08:33,671 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:08:33,672 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:08:33,673 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:08:33,674 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:08:33,675 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:08:33,676 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:08:33,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:08:33,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:08:33,681 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:08:33,682 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:08:33,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:08:33,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:08:33,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:08:33,697 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 19:08:33,715 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:08:33,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:08:33,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:08:33,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:08:33,717 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:08:33,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:08:33,718 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:08:33,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:08:33,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:08:33,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:08:33,718 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:08:33,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:08:33,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:08:33,719 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:08:33,719 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:08:33,719 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:08:33,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:08:33,720 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:08:33,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:08:33,720 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:08:33,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:08:33,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:08:33,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:08:33,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:08:33,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:08:33,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:08:33,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:08:33,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:08:33,722 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:08:34,006 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:08:34,028 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:08:34,032 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:08:34,033 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:08:34,033 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:08:34,034 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label20.c [2019-11-06 19:08:34,100 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f4dc9b4/6dc60a9c524f4b5ba07ad8b75c87d487/FLAG2aa4ed090 [2019-11-06 19:08:34,699 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:08:34,700 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label20.c [2019-11-06 19:08:34,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f4dc9b4/6dc60a9c524f4b5ba07ad8b75c87d487/FLAG2aa4ed090 [2019-11-06 19:08:34,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3f4dc9b4/6dc60a9c524f4b5ba07ad8b75c87d487 [2019-11-06 19:08:34,978 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:08:34,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:08:34,981 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:34,981 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:08:34,984 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:08:34,985 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:34" (1/1) ... [2019-11-06 19:08:34,988 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58706db1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:34, skipping insertion in model container [2019-11-06 19:08:34,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:34" (1/1) ... [2019-11-06 19:08:34,996 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:08:35,055 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:08:35,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:35,659 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:08:35,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:35,917 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:08:35,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:35 WrapperNode [2019-11-06 19:08:35,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:35,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:08:35,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:08:35,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:08:35,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:35" (1/1) ... [2019-11-06 19:08:35,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:35" (1/1) ... [2019-11-06 19:08:35,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:35" (1/1) ... [2019-11-06 19:08:35,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:35" (1/1) ... [2019-11-06 19:08:36,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:35" (1/1) ... [2019-11-06 19:08:36,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:35" (1/1) ... [2019-11-06 19:08:36,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:35" (1/1) ... [2019-11-06 19:08:36,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:08:36,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:08:36,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:08:36,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:08:36,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:35" (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 19:08:36,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:08:36,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:08:36,163 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:08:36,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:08:36,163 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:08:36,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:08:36,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:08:36,164 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:08:36,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:08:36,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:08:36,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:08:38,090 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:08:38,090 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:08:38,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:38 BoogieIcfgContainer [2019-11-06 19:08:38,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:08:38,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:08:38,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:08:38,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:08:38,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:08:34" (1/3) ... [2019-11-06 19:08:38,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f282e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:38, skipping insertion in model container [2019-11-06 19:08:38,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:35" (2/3) ... [2019-11-06 19:08:38,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f282e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:38, skipping insertion in model container [2019-11-06 19:08:38,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:38" (3/3) ... [2019-11-06 19:08:38,106 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label20.c [2019-11-06 19:08:38,146 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:08:38,156 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:08:38,168 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:08:38,213 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:08:38,213 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:08:38,215 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:08:38,215 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:08:38,215 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:08:38,216 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:08:38,216 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:08:38,216 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:08:38,253 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:08:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 19:08:38,260 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:38,261 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:38,263 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:38,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:38,269 INFO L82 PathProgramCache]: Analyzing trace with hash -960649190, now seen corresponding path program 1 times [2019-11-06 19:08:38,278 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:38,279 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161172481] [2019-11-06 19:08:38,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:38,624 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 19:08:38,625 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161172481] [2019-11-06 19:08:38,626 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:38,626 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:08:38,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006715594] [2019-11-06 19:08:38,634 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:38,634 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:38,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:38,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:08:38,652 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:08:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:41,876 INFO L93 Difference]: Finished difference Result 990 states and 1774 transitions. [2019-11-06 19:08:41,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:41,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-06 19:08:41,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:41,903 INFO L225 Difference]: With dead ends: 990 [2019-11-06 19:08:41,903 INFO L226 Difference]: Without dead ends: 629 [2019-11-06 19:08:41,913 INFO L630 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 [2019-11-06 19:08:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2019-11-06 19:08:42,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 625. [2019-11-06 19:08:42,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2019-11-06 19:08:42,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 865 transitions. [2019-11-06 19:08:42,012 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 865 transitions. Word has length 15 [2019-11-06 19:08:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:42,012 INFO L462 AbstractCegarLoop]: Abstraction has 625 states and 865 transitions. [2019-11-06 19:08:42,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 865 transitions. [2019-11-06 19:08:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-06 19:08:42,018 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:42,018 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:08:42,018 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:42,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:42,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1986341175, now seen corresponding path program 1 times [2019-11-06 19:08:42,019 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:42,019 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193275426] [2019-11-06 19:08:42,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:42,397 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193275426] [2019-11-06 19:08:42,397 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227916331] [2019-11-06 19:08:42,397 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 19:08:42,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:42,490 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:42,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:42,556 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:42,556 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:08:42,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727478534] [2019-11-06 19:08:42,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:42,562 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:42,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:42,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:42,563 INFO L87 Difference]: Start difference. First operand 625 states and 865 transitions. Second operand 3 states. [2019-11-06 19:08:43,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:43,714 INFO L93 Difference]: Finished difference Result 1826 states and 2564 transitions. [2019-11-06 19:08:43,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:43,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-11-06 19:08:43,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:43,729 INFO L225 Difference]: With dead ends: 1826 [2019-11-06 19:08:43,729 INFO L226 Difference]: Without dead ends: 1207 [2019-11-06 19:08:43,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:43,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2019-11-06 19:08:43,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1197. [2019-11-06 19:08:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1197 states. [2019-11-06 19:08:43,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1562 transitions. [2019-11-06 19:08:43,808 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1562 transitions. Word has length 88 [2019-11-06 19:08:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:43,809 INFO L462 AbstractCegarLoop]: Abstraction has 1197 states and 1562 transitions. [2019-11-06 19:08:43,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:43,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1562 transitions. [2019-11-06 19:08:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-06 19:08:43,822 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:43,823 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:08:44,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:44,037 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:44,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:44,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1316413698, now seen corresponding path program 1 times [2019-11-06 19:08:44,038 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:44,039 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288042155] [2019-11-06 19:08:44,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:44,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:44,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:44,221 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288042155] [2019-11-06 19:08:44,221 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919928656] [2019-11-06 19:08:44,221 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 19:08:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:44,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:44,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:44,312 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:44,312 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:08:44,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121734523] [2019-11-06 19:08:44,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:44,313 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:44,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:44,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:44,314 INFO L87 Difference]: Start difference. First operand 1197 states and 1562 transitions. Second operand 3 states. [2019-11-06 19:08:45,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:45,383 INFO L93 Difference]: Finished difference Result 2970 states and 3975 transitions. [2019-11-06 19:08:45,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:45,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2019-11-06 19:08:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:45,394 INFO L225 Difference]: With dead ends: 2970 [2019-11-06 19:08:45,394 INFO L226 Difference]: Without dead ends: 1779 [2019-11-06 19:08:45,398 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1779 states. [2019-11-06 19:08:45,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1768. [2019-11-06 19:08:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1768 states. [2019-11-06 19:08:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1768 states to 1768 states and 2360 transitions. [2019-11-06 19:08:45,451 INFO L78 Accepts]: Start accepts. Automaton has 1768 states and 2360 transitions. Word has length 89 [2019-11-06 19:08:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:45,451 INFO L462 AbstractCegarLoop]: Abstraction has 1768 states and 2360 transitions. [2019-11-06 19:08:45,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1768 states and 2360 transitions. [2019-11-06 19:08:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-11-06 19:08:45,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:45,456 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:08:45,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:45,661 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:45,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:45,662 INFO L82 PathProgramCache]: Analyzing trace with hash 2070996454, now seen corresponding path program 1 times [2019-11-06 19:08:45,662 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:45,663 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536665449] [2019-11-06 19:08:45,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:46,081 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536665449] [2019-11-06 19:08:46,082 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548647934] [2019-11-06 19:08:46,082 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 19:08:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:46,170 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:08:46,184 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:46,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:46,307 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:46,307 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2019-11-06 19:08:46,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901212794] [2019-11-06 19:08:46,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:46,310 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:46,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:46,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:08:46,312 INFO L87 Difference]: Start difference. First operand 1768 states and 2360 transitions. Second operand 5 states. [2019-11-06 19:08:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:48,027 INFO L93 Difference]: Finished difference Result 3972 states and 5374 transitions. [2019-11-06 19:08:48,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:08:48,028 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 109 [2019-11-06 19:08:48,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:48,041 INFO L225 Difference]: With dead ends: 3972 [2019-11-06 19:08:48,041 INFO L226 Difference]: Without dead ends: 2210 [2019-11-06 19:08:48,045 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:08:48,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2019-11-06 19:08:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 2009. [2019-11-06 19:08:48,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2009 states. [2019-11-06 19:08:48,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 2687 transitions. [2019-11-06 19:08:48,112 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 2687 transitions. Word has length 109 [2019-11-06 19:08:48,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:48,113 INFO L462 AbstractCegarLoop]: Abstraction has 2009 states and 2687 transitions. [2019-11-06 19:08:48,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:48,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 2687 transitions. [2019-11-06 19:08:48,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-06 19:08:48,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:48,116 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 19:08:48,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:48,329 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:48,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:48,329 INFO L82 PathProgramCache]: Analyzing trace with hash -894366490, now seen corresponding path program 1 times [2019-11-06 19:08:48,329 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:48,330 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259261879] [2019-11-06 19:08:48,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:08:48,644 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259261879] [2019-11-06 19:08:48,644 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536380436] [2019-11-06 19:08:48,644 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 19:08:48,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:48,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:08:48,742 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 19:08:48,847 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:48,848 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:08:48,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327175874] [2019-11-06 19:08:48,849 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:48,849 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:48,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:48,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:08:48,850 INFO L87 Difference]: Start difference. First operand 2009 states and 2687 transitions. Second operand 5 states. [2019-11-06 19:08:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:50,514 INFO L93 Difference]: Finished difference Result 4281 states and 5805 transitions. [2019-11-06 19:08:50,515 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:50,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 181 [2019-11-06 19:08:50,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:50,528 INFO L225 Difference]: With dead ends: 4281 [2019-11-06 19:08:50,528 INFO L226 Difference]: Without dead ends: 2278 [2019-11-06 19:08:50,534 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:08:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2019-11-06 19:08:50,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2230. [2019-11-06 19:08:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2230 states. [2019-11-06 19:08:50,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 2851 transitions. [2019-11-06 19:08:50,609 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 2851 transitions. Word has length 181 [2019-11-06 19:08:50,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:50,613 INFO L462 AbstractCegarLoop]: Abstraction has 2230 states and 2851 transitions. [2019-11-06 19:08:50,613 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:50,613 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 2851 transitions. [2019-11-06 19:08:50,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-11-06 19:08:50,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:50,619 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 19:08:50,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:50,823 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:50,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1402300876, now seen corresponding path program 1 times [2019-11-06 19:08:50,824 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:50,824 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632265895] [2019-11-06 19:08:50,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:51,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 19:08:51,324 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632265895] [2019-11-06 19:08:51,325 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552024911] [2019-11-06 19:08:51,325 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:51,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 19:08:51,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:51,841 WARN L191 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2019-11-06 19:08:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-06 19:08:51,967 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:51,967 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2019-11-06 19:08:51,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802407798] [2019-11-06 19:08:51,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:08:51,969 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:51,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:08:51,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:08:51,970 INFO L87 Difference]: Start difference. First operand 2230 states and 2851 transitions. Second operand 12 states. [2019-11-06 19:08:57,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:57,522 INFO L93 Difference]: Finished difference Result 7451 states and 10324 transitions. [2019-11-06 19:08:57,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 19:08:57,522 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 225 [2019-11-06 19:08:57,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:57,550 INFO L225 Difference]: With dead ends: 7451 [2019-11-06 19:08:57,550 INFO L226 Difference]: Without dead ends: 5415 [2019-11-06 19:08:57,557 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:08:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5415 states. [2019-11-06 19:08:57,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5415 to 5377. [2019-11-06 19:08:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5377 states. [2019-11-06 19:08:57,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5377 states to 5377 states and 7097 transitions. [2019-11-06 19:08:57,695 INFO L78 Accepts]: Start accepts. Automaton has 5377 states and 7097 transitions. Word has length 225 [2019-11-06 19:08:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:57,696 INFO L462 AbstractCegarLoop]: Abstraction has 5377 states and 7097 transitions. [2019-11-06 19:08:57,696 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:08:57,696 INFO L276 IsEmpty]: Start isEmpty. Operand 5377 states and 7097 transitions. [2019-11-06 19:08:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-11-06 19:08:57,707 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:57,707 INFO L410 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:57,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:57,912 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:57,912 INFO L82 PathProgramCache]: Analyzing trace with hash 471610887, now seen corresponding path program 1 times [2019-11-06 19:08:57,912 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:57,913 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049930156] [2019-11-06 19:08:57,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-11-06 19:08:58,286 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049930156] [2019-11-06 19:08:58,286 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:58,287 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:08:58,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379248391] [2019-11-06 19:08:58,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 19:08:58,288 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:58,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 19:08:58,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:08:58,289 INFO L87 Difference]: Start difference. First operand 5377 states and 7097 transitions. Second operand 6 states. [2019-11-06 19:09:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:00,676 INFO L93 Difference]: Finished difference Result 12116 states and 16503 transitions. [2019-11-06 19:09:00,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:09:00,676 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 298 [2019-11-06 19:09:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:00,709 INFO L225 Difference]: With dead ends: 12116 [2019-11-06 19:09:00,709 INFO L226 Difference]: Without dead ends: 7123 [2019-11-06 19:09:00,723 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:09:00,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7123 states. [2019-11-06 19:09:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7123 to 7096. [2019-11-06 19:09:00,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7096 states. [2019-11-06 19:09:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 9332 transitions. [2019-11-06 19:09:00,904 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 9332 transitions. Word has length 298 [2019-11-06 19:09:00,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:00,904 INFO L462 AbstractCegarLoop]: Abstraction has 7096 states and 9332 transitions. [2019-11-06 19:09:00,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 19:09:00,905 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 9332 transitions. [2019-11-06 19:09:00,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2019-11-06 19:09:00,915 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:00,916 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 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 19:09:00,916 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:00,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:00,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1376271937, now seen corresponding path program 1 times [2019-11-06 19:09:00,917 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:00,917 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888118372] [2019-11-06 19:09:00,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:01,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2019-11-06 19:09:01,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888118372] [2019-11-06 19:09:01,303 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:09:01,303 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:09:01,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224090400] [2019-11-06 19:09:01,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 19:09:01,305 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:01,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 19:09:01,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:09:01,306 INFO L87 Difference]: Start difference. First operand 7096 states and 9332 transitions. Second operand 6 states. [2019-11-06 19:09:04,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:09:04,756 INFO L93 Difference]: Finished difference Result 19287 states and 26165 transitions. [2019-11-06 19:09:04,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:09:04,757 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 306 [2019-11-06 19:09:04,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:09:04,813 INFO L225 Difference]: With dead ends: 19287 [2019-11-06 19:09:04,813 INFO L226 Difference]: Without dead ends: 11815 [2019-11-06 19:09:04,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-11-06 19:09:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11815 states. [2019-11-06 19:09:05,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11815 to 10481. [2019-11-06 19:09:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10481 states. [2019-11-06 19:09:05,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10481 states to 10481 states and 12842 transitions. [2019-11-06 19:09:05,084 INFO L78 Accepts]: Start accepts. Automaton has 10481 states and 12842 transitions. Word has length 306 [2019-11-06 19:09:05,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:09:05,084 INFO L462 AbstractCegarLoop]: Abstraction has 10481 states and 12842 transitions. [2019-11-06 19:09:05,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 19:09:05,084 INFO L276 IsEmpty]: Start isEmpty. Operand 10481 states and 12842 transitions. [2019-11-06 19:09:05,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2019-11-06 19:09:05,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:09:05,097 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:09:05,098 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:09:05,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:09:05,098 INFO L82 PathProgramCache]: Analyzing trace with hash 854096169, now seen corresponding path program 1 times [2019-11-06 19:09:05,099 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:09:05,099 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755159716] [2019-11-06 19:09:05,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:09:05,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 176 proven. 97 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:09:05,679 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755159716] [2019-11-06 19:09:05,680 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039975180] [2019-11-06 19:09:05,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:09:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:09:05,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 19:09:05,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:09:05,900 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:09:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2019-11-06 19:09:06,033 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:09:06,033 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 19:09:06,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793819980] [2019-11-06 19:09:06,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:09:06,035 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:09:06,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:09:06,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:09:06,035 INFO L87 Difference]: Start difference. First operand 10481 states and 12842 transitions. Second operand 16 states.