/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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:37:35,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:37:35,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:37:35,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:37:35,767 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 22:37:35,796 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:37:35,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:37:35,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:37:35,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:37:35,798 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:37:35,798 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:37:35,799 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:37:35,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:37:35,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:37:35,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:37:35,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:37:35,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:37:35,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:37:35,801 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:37:35,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:37:35,801 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:37:35,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:37:35,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:37:35,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:37:35,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:37:35,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:37:35,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:37:35,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:37:35,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:37:35,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:37:35,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:37:35,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:37:35,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:37:35,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-11-06 22:37:36,131 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:37:36,144 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:37:36,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:37:36,149 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:37:36,150 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:37:36,151 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-11-06 22:37:36,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fa0e73d5/dc3f0cea3205472e853290594cae4fbc/FLAGbe45fda57 [2019-11-06 22:37:36,905 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:37:36,907 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-11-06 22:37:36,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fa0e73d5/dc3f0cea3205472e853290594cae4fbc/FLAGbe45fda57 [2019-11-06 22:37:37,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fa0e73d5/dc3f0cea3205472e853290594cae4fbc [2019-11-06 22:37:37,154 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:37:37,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:37:37,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:37:37,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:37:37,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:37:37,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:37" (1/1) ... [2019-11-06 22:37:37,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a6c2c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:37, skipping insertion in model container [2019-11-06 22:37:37,165 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:37:37" (1/1) ... [2019-11-06 22:37:37,172 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:37:37,248 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:37:38,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:37:38,078 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:37:38,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:37:38,378 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:37:38,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:38 WrapperNode [2019-11-06 22:37:38,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:37:38,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:37:38,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:37:38,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:37:38,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:38" (1/1) ... [2019-11-06 22:37:38,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:38" (1/1) ... [2019-11-06 22:37:38,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:38" (1/1) ... [2019-11-06 22:37:38,444 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:38" (1/1) ... [2019-11-06 22:37:38,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:38" (1/1) ... [2019-11-06 22:37:38,532 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:38" (1/1) ... [2019-11-06 22:37:38,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:38" (1/1) ... [2019-11-06 22:37:38,556 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:37:38,556 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:37:38,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:37:38,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:37:38,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:38" (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 22:37:38,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:37:38,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:37:38,614 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:37:38,614 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:37:38,614 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:37:38,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:37:38,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:37:38,615 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:37:38,615 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:37:38,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:37:38,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:37:40,603 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:37:40,604 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:37:40,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:40 BoogieIcfgContainer [2019-11-06 22:37:40,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:37:40,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:37:40,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:37:40,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:37:40,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:37:37" (1/3) ... [2019-11-06 22:37:40,618 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d49e93f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:40, skipping insertion in model container [2019-11-06 22:37:40,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:37:38" (2/3) ... [2019-11-06 22:37:40,619 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d49e93f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:37:40, skipping insertion in model container [2019-11-06 22:37:40,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:37:40" (3/3) ... [2019-11-06 22:37:40,626 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2019-11-06 22:37:40,640 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:37:40,649 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:37:40,661 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:37:40,690 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:37:40,690 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:37:40,690 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:37:40,690 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:37:40,690 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:37:40,691 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:37:40,691 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:37:40,691 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:37:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 22:37:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-06 22:37:40,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:40,749 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, 1, 1, 1, 1] [2019-11-06 22:37:40,751 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:40,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:40,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1944252984, now seen corresponding path program 1 times [2019-11-06 22:37:40,766 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:40,766 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890754966] [2019-11-06 22:37:40,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:41,572 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 22:37:41,573 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890754966] [2019-11-06 22:37:41,574 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:41,574 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:37:41,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508816070] [2019-11-06 22:37:41,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:37:41,585 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:41,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:37:41,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:41,602 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-11-06 22:37:42,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:42,923 INFO L93 Difference]: Finished difference Result 835 states and 1476 transitions. [2019-11-06 22:37:42,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:42,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-11-06 22:37:42,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:42,945 INFO L225 Difference]: With dead ends: 835 [2019-11-06 22:37:42,946 INFO L226 Difference]: Without dead ends: 462 [2019-11-06 22:37:42,953 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:42,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2019-11-06 22:37:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2019-11-06 22:37:43,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-11-06 22:37:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 739 transitions. [2019-11-06 22:37:43,032 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 739 transitions. Word has length 161 [2019-11-06 22:37:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:43,034 INFO L462 AbstractCegarLoop]: Abstraction has 460 states and 739 transitions. [2019-11-06 22:37:43,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 739 transitions. [2019-11-06 22:37:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-11-06 22:37:43,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:43,040 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:37:43,040 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:43,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:43,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1469747701, now seen corresponding path program 1 times [2019-11-06 22:37:43,041 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:43,041 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127786169] [2019-11-06 22:37:43,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:43,238 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127786169] [2019-11-06 22:37:43,238 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:43,238 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:37:43,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007692448] [2019-11-06 22:37:43,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:37:43,241 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:43,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:37:43,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:37:43,242 INFO L87 Difference]: Start difference. First operand 460 states and 739 transitions. Second operand 6 states. [2019-11-06 22:37:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:44,897 INFO L93 Difference]: Finished difference Result 1391 states and 2302 transitions. [2019-11-06 22:37:44,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 22:37:44,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 170 [2019-11-06 22:37:44,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:44,908 INFO L225 Difference]: With dead ends: 1391 [2019-11-06 22:37:44,909 INFO L226 Difference]: Without dead ends: 937 [2019-11-06 22:37:44,912 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:37:44,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2019-11-06 22:37:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 899. [2019-11-06 22:37:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-11-06 22:37:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1431 transitions. [2019-11-06 22:37:44,994 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1431 transitions. Word has length 170 [2019-11-06 22:37:44,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:44,994 INFO L462 AbstractCegarLoop]: Abstraction has 899 states and 1431 transitions. [2019-11-06 22:37:44,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:37:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1431 transitions. [2019-11-06 22:37:45,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-06 22:37:45,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:45,004 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, 1, 1, 1, 1] [2019-11-06 22:37:45,004 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:45,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash 931269084, now seen corresponding path program 1 times [2019-11-06 22:37:45,009 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:45,009 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576655372] [2019-11-06 22:37:45,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:45,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:45,283 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 22:37:45,283 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576655372] [2019-11-06 22:37:45,284 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:45,284 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:37:45,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212855141] [2019-11-06 22:37:45,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:37:45,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:45,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:37:45,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:45,288 INFO L87 Difference]: Start difference. First operand 899 states and 1431 transitions. Second operand 3 states. [2019-11-06 22:37:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:46,412 INFO L93 Difference]: Finished difference Result 2635 states and 4271 transitions. [2019-11-06 22:37:46,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:46,414 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-11-06 22:37:46,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:46,428 INFO L225 Difference]: With dead ends: 2635 [2019-11-06 22:37:46,429 INFO L226 Difference]: Without dead ends: 1742 [2019-11-06 22:37:46,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2019-11-06 22:37:46,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1737. [2019-11-06 22:37:46,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1737 states. [2019-11-06 22:37:46,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2653 transitions. [2019-11-06 22:37:46,521 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2653 transitions. Word has length 173 [2019-11-06 22:37:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:46,530 INFO L462 AbstractCegarLoop]: Abstraction has 1737 states and 2653 transitions. [2019-11-06 22:37:46,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:46,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2653 transitions. [2019-11-06 22:37:46,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-06 22:37:46,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:46,539 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:37:46,539 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:46,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:46,540 INFO L82 PathProgramCache]: Analyzing trace with hash 800082475, now seen corresponding path program 1 times [2019-11-06 22:37:46,540 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:46,540 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493502552] [2019-11-06 22:37:46,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:46,797 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493502552] [2019-11-06 22:37:46,798 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:46,798 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:37:46,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847957709] [2019-11-06 22:37:46,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:37:46,800 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:46,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:37:46,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:46,801 INFO L87 Difference]: Start difference. First operand 1737 states and 2653 transitions. Second operand 3 states. [2019-11-06 22:37:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:48,066 INFO L93 Difference]: Finished difference Result 5148 states and 8066 transitions. [2019-11-06 22:37:48,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:48,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2019-11-06 22:37:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:48,090 INFO L225 Difference]: With dead ends: 5148 [2019-11-06 22:37:48,091 INFO L226 Difference]: Without dead ends: 3417 [2019-11-06 22:37:48,096 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:37:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2019-11-06 22:37:48,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3415. [2019-11-06 22:37:48,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3415 states. [2019-11-06 22:37:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 5080 transitions. [2019-11-06 22:37:48,226 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 5080 transitions. Word has length 193 [2019-11-06 22:37:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:48,227 INFO L462 AbstractCegarLoop]: Abstraction has 3415 states and 5080 transitions. [2019-11-06 22:37:48,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 5080 transitions. [2019-11-06 22:37:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-11-06 22:37:48,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:48,239 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:37:48,239 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:48,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:48,239 INFO L82 PathProgramCache]: Analyzing trace with hash -16680445, now seen corresponding path program 1 times [2019-11-06 22:37:48,240 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:48,240 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590523353] [2019-11-06 22:37:48,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:48,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590523353] [2019-11-06 22:37:48,407 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:48,407 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:37:48,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107013316] [2019-11-06 22:37:48,408 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:37:48,409 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:48,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:37:48,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:37:48,410 INFO L87 Difference]: Start difference. First operand 3415 states and 5080 transitions. Second operand 6 states. [2019-11-06 22:37:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:49,873 INFO L93 Difference]: Finished difference Result 8666 states and 13711 transitions. [2019-11-06 22:37:49,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:37:49,874 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 198 [2019-11-06 22:37:49,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:49,915 INFO L225 Difference]: With dead ends: 8666 [2019-11-06 22:37:49,916 INFO L226 Difference]: Without dead ends: 5257 [2019-11-06 22:37:49,928 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:37:49,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5257 states. [2019-11-06 22:37:50,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5257 to 5185. [2019-11-06 22:37:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5185 states. [2019-11-06 22:37:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 6866 transitions. [2019-11-06 22:37:50,093 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 6866 transitions. Word has length 198 [2019-11-06 22:37:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:50,093 INFO L462 AbstractCegarLoop]: Abstraction has 5185 states and 6866 transitions. [2019-11-06 22:37:50,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:37:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 6866 transitions. [2019-11-06 22:37:50,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-11-06 22:37:50,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:50,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:37:50,112 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:50,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1873113638, now seen corresponding path program 1 times [2019-11-06 22:37:50,113 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:50,113 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605803872] [2019-11-06 22:37:50,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:50,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605803872] [2019-11-06 22:37:50,437 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:37:50,437 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:37:50,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768891263] [2019-11-06 22:37:50,438 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:37:50,438 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:50,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:37:50,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:37:50,439 INFO L87 Difference]: Start difference. First operand 5185 states and 6866 transitions. Second operand 6 states. [2019-11-06 22:37:51,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:51,911 INFO L93 Difference]: Finished difference Result 10468 states and 14252 transitions. [2019-11-06 22:37:51,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:37:51,911 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 219 [2019-11-06 22:37:51,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:51,941 INFO L225 Difference]: With dead ends: 10468 [2019-11-06 22:37:51,941 INFO L226 Difference]: Without dead ends: 5289 [2019-11-06 22:37:51,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:37:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2019-11-06 22:37:52,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 5231. [2019-11-06 22:37:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5231 states. [2019-11-06 22:37:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 6715 transitions. [2019-11-06 22:37:52,204 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 6715 transitions. Word has length 219 [2019-11-06 22:37:52,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:52,205 INFO L462 AbstractCegarLoop]: Abstraction has 5231 states and 6715 transitions. [2019-11-06 22:37:52,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:37:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 6715 transitions. [2019-11-06 22:37:52,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-11-06 22:37:52,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:52,226 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:37:52,226 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:52,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1714721478, now seen corresponding path program 1 times [2019-11-06 22:37:52,231 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:52,231 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177453924] [2019-11-06 22:37:52,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:37:52,479 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177453924] [2019-11-06 22:37:52,479 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764321792] [2019-11-06 22:37:52,481 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 22:37:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:52,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:37:52,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:37:52,884 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:37:52,884 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:37:53,049 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:37:53,050 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:37:53,050 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:37:53,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449557923] [2019-11-06 22:37:53,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:37:53,051 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:37:53,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:37:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:37:53,052 INFO L87 Difference]: Start difference. First operand 5231 states and 6715 transitions. Second operand 3 states. [2019-11-06 22:37:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:37:54,198 INFO L93 Difference]: Finished difference Result 15515 states and 20303 transitions. [2019-11-06 22:37:54,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:37:54,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 231 [2019-11-06 22:37:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:37:54,252 INFO L225 Difference]: With dead ends: 15515 [2019-11-06 22:37:54,253 INFO L226 Difference]: Without dead ends: 10290 [2019-11-06 22:37:54,269 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 460 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:37:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10290 states. [2019-11-06 22:37:54,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10290 to 10265. [2019-11-06 22:37:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10265 states. [2019-11-06 22:37:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10265 states to 10265 states and 13454 transitions. [2019-11-06 22:37:54,568 INFO L78 Accepts]: Start accepts. Automaton has 10265 states and 13454 transitions. Word has length 231 [2019-11-06 22:37:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:37:54,569 INFO L462 AbstractCegarLoop]: Abstraction has 10265 states and 13454 transitions. [2019-11-06 22:37:54,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:37:54,569 INFO L276 IsEmpty]: Start isEmpty. Operand 10265 states and 13454 transitions. [2019-11-06 22:37:54,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-11-06 22:37:54,598 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:37:54,598 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:37:54,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:37:54,805 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:37:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:37:54,805 INFO L82 PathProgramCache]: Analyzing trace with hash -688510333, now seen corresponding path program 1 times [2019-11-06 22:37:54,806 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:37:54,806 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245213462] [2019-11-06 22:37:54,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:37:54,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 22:37:55,076 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245213462] [2019-11-06 22:37:55,077 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026270021] [2019-11-06 22:37:55,077 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 22:37:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:37:55,344 INFO L256 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:37:55,353 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:37:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:37:55,450 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:37:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-06 22:37:55,549 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [245862975] [2019-11-06 22:37:55,556 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 235 [2019-11-06 22:37:55,623 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:37:55,623 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)