/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/Problem16_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:54:46,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:54:46,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:54:46,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:54:46,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:54:46,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:54:46,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:54:46,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:54:46,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:54:46,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:54:46,577 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:54:46,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:54:46,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:54:46,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:54:46,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:54:46,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:54:46,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:54:46,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:54:46,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:54:46,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:54:46,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:54:46,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:54:46,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:54:46,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:54:46,593 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:54:46,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:54:46,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:54:46,602 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:54:46,603 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 22:54:46,617 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:54:46,617 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:54:46,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:54:46,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:54:46,619 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:54:46,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:54:46,619 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:54:46,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:54:46,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:54:46,620 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:54:46,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:54:46,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:54:46,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:54:46,620 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:54:46,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:54:46,621 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:54:46,621 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:54:46,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:54:46,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:54:46,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:54:46,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:54:46,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:54:46,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:54:46,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:54:46,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:54:46,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:54:46,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:54:46,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:54:46,623 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 22:54:46,904 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:54:46,916 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:54:46,920 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:54:46,921 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:54:46,921 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:54:46,922 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label26.c [2019-11-06 22:54:46,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d58cf266f/c59e2c7c710c471c95f13fd0e3c716d8/FLAGc6591a9aa [2019-11-06 22:54:47,658 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:54:47,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label26.c [2019-11-06 22:54:47,678 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d58cf266f/c59e2c7c710c471c95f13fd0e3c716d8/FLAGc6591a9aa [2019-11-06 22:54:47,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d58cf266f/c59e2c7c710c471c95f13fd0e3c716d8 [2019-11-06 22:54:47,839 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:54:47,841 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:54:47,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:47,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:54:47,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:54:47,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:47" (1/1) ... [2019-11-06 22:54:47,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f4bee38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:47, skipping insertion in model container [2019-11-06 22:54:47,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:47" (1/1) ... [2019-11-06 22:54:47,857 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:54:47,927 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:54:48,806 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:48,823 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:54:49,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:49,235 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:54:49,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:49 WrapperNode [2019-11-06 22:54:49,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:49,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:54:49,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:54:49,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:54:49,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:49" (1/1) ... [2019-11-06 22:54:49,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:49" (1/1) ... [2019-11-06 22:54:49,300 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:49" (1/1) ... [2019-11-06 22:54:49,301 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:49" (1/1) ... [2019-11-06 22:54:49,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:49" (1/1) ... [2019-11-06 22:54:49,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:49" (1/1) ... [2019-11-06 22:54:49,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:49" (1/1) ... [2019-11-06 22:54:49,434 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:54:49,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:54:49,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:54:49,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:54:49,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:49" (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 22:54:49,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:54:49,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:54:49,493 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:54:49,493 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:54:49,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:54:49,493 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:54:49,493 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:54:49,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:54:49,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:54:49,494 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:54:49,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:54:49,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:54:49,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:54:51,915 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:54:51,920 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:54:51,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:51 BoogieIcfgContainer [2019-11-06 22:54:51,922 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:54:51,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:54:51,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:54:51,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:54:51,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:47" (1/3) ... [2019-11-06 22:54:51,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8b8d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:51, skipping insertion in model container [2019-11-06 22:54:51,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:49" (2/3) ... [2019-11-06 22:54:51,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8b8d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:51, skipping insertion in model container [2019-11-06 22:54:51,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:51" (3/3) ... [2019-11-06 22:54:51,938 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label26.c [2019-11-06 22:54:51,950 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:54:51,962 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:54:51,975 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:54:52,022 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:54:52,022 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:54:52,023 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:54:52,023 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:54:52,023 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:54:52,023 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:54:52,023 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:54:52,023 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:54:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:54:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 22:54:52,069 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:52,071 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] [2019-11-06 22:54:52,073 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:52,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:52,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1586905158, now seen corresponding path program 1 times [2019-11-06 22:54:52,089 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:52,090 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153530573] [2019-11-06 22:54:52,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:52,372 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 22:54:52,373 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153530573] [2019-11-06 22:54:52,374 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:52,374 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:54:52,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204928362] [2019-11-06 22:54:52,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:54:52,383 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:52,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:54:52,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:54:52,401 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:54:54,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:54,926 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:54:54,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:54:54,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2019-11-06 22:54:54,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:54,951 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:54:54,951 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:54:54,970 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 22:54:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:54:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:54:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:54:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1172 transitions. [2019-11-06 22:54:55,105 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1172 transitions. Word has length 41 [2019-11-06 22:54:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:55,105 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1172 transitions. [2019-11-06 22:54:55,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:54:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1172 transitions. [2019-11-06 22:54:55,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-11-06 22:54:55,120 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:55,120 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] [2019-11-06 22:54:55,124 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:55,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:55,124 INFO L82 PathProgramCache]: Analyzing trace with hash 904307166, now seen corresponding path program 1 times [2019-11-06 22:54:55,125 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:55,125 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975881755] [2019-11-06 22:54:55,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:55,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:55,396 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 22:54:55,397 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975881755] [2019-11-06 22:54:55,397 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:55,397 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:55,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243261796] [2019-11-06 22:54:55,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:55,400 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:55,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:55,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:55,435 INFO L87 Difference]: Start difference. First operand 682 states and 1172 transitions. Second operand 6 states. [2019-11-06 22:54:58,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:58,493 INFO L93 Difference]: Finished difference Result 2074 states and 3595 transitions. [2019-11-06 22:54:58,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:58,495 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 113 [2019-11-06 22:54:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:58,510 INFO L225 Difference]: With dead ends: 2074 [2019-11-06 22:54:58,510 INFO L226 Difference]: Without dead ends: 1398 [2019-11-06 22:54:58,514 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 22:54:58,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2019-11-06 22:54:58,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1382. [2019-11-06 22:54:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1382 states. [2019-11-06 22:54:58,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 2347 transitions. [2019-11-06 22:54:58,604 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 2347 transitions. Word has length 113 [2019-11-06 22:54:58,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:58,606 INFO L462 AbstractCegarLoop]: Abstraction has 1382 states and 2347 transitions. [2019-11-06 22:54:58,607 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:58,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 2347 transitions. [2019-11-06 22:54:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 22:54:58,618 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:58,618 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] [2019-11-06 22:54:58,618 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:58,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:58,619 INFO L82 PathProgramCache]: Analyzing trace with hash 569099783, now seen corresponding path program 1 times [2019-11-06 22:54:58,619 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:58,620 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925986083] [2019-11-06 22:54:58,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:58,943 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 22:54:58,943 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925986083] [2019-11-06 22:54:58,944 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:58,945 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:58,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370731809] [2019-11-06 22:54:58,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:58,947 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:58,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:58,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:58,949 INFO L87 Difference]: Start difference. First operand 1382 states and 2347 transitions. Second operand 6 states. [2019-11-06 22:55:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:01,582 INFO L93 Difference]: Finished difference Result 3496 states and 6017 transitions. [2019-11-06 22:55:01,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:01,583 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-11-06 22:55:01,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:01,610 INFO L225 Difference]: With dead ends: 3496 [2019-11-06 22:55:01,610 INFO L226 Difference]: Without dead ends: 2120 [2019-11-06 22:55:01,615 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 22:55:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2019-11-06 22:55:01,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 2088. [2019-11-06 22:55:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2019-11-06 22:55:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3352 transitions. [2019-11-06 22:55:01,724 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3352 transitions. Word has length 142 [2019-11-06 22:55:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:01,727 INFO L462 AbstractCegarLoop]: Abstraction has 2088 states and 3352 transitions. [2019-11-06 22:55:01,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:01,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3352 transitions. [2019-11-06 22:55:01,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2019-11-06 22:55:01,735 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:01,736 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:01,736 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:01,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:01,736 INFO L82 PathProgramCache]: Analyzing trace with hash -256933473, now seen corresponding path program 1 times [2019-11-06 22:55:01,737 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:01,737 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578945349] [2019-11-06 22:55:01,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:01,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:02,285 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 22:55:02,285 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578945349] [2019-11-06 22:55:02,286 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:55:02,286 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:55:02,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020756072] [2019-11-06 22:55:02,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:55:02,288 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:02,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:55:02,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:55:02,288 INFO L87 Difference]: Start difference. First operand 2088 states and 3352 transitions. Second operand 6 states. [2019-11-06 22:55:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:04,818 INFO L93 Difference]: Finished difference Result 5903 states and 9557 transitions. [2019-11-06 22:55:04,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:04,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 314 [2019-11-06 22:55:04,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:04,849 INFO L225 Difference]: With dead ends: 5903 [2019-11-06 22:55:04,849 INFO L226 Difference]: Without dead ends: 3821 [2019-11-06 22:55:04,856 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 22:55:04,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2019-11-06 22:55:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3470. [2019-11-06 22:55:04,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3470 states. [2019-11-06 22:55:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3470 states to 3470 states and 5255 transitions. [2019-11-06 22:55:04,974 INFO L78 Accepts]: Start accepts. Automaton has 3470 states and 5255 transitions. Word has length 314 [2019-11-06 22:55:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:04,976 INFO L462 AbstractCegarLoop]: Abstraction has 3470 states and 5255 transitions. [2019-11-06 22:55:04,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:55:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3470 states and 5255 transitions. [2019-11-06 22:55:04,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2019-11-06 22:55:04,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:04,987 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 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 22:55:04,987 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:04,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:04,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1551608138, now seen corresponding path program 1 times [2019-11-06 22:55:04,988 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:04,989 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454309722] [2019-11-06 22:55:04,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:05,358 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 68 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:55:05,359 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454309722] [2019-11-06 22:55:05,359 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965775070] [2019-11-06 22:55:05,359 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 22:55:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:05,531 INFO L256 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:55:05,548 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-06 22:55:05,834 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 68 proven. 111 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:55:06,132 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:55:06,132 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:55:06,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070637270] [2019-11-06 22:55:06,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:55:06,134 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:55:06,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:55:06,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:55:06,135 INFO L87 Difference]: Start difference. First operand 3470 states and 5255 transitions. Second operand 5 states. [2019-11-06 22:55:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:55:09,027 INFO L93 Difference]: Finished difference Result 8334 states and 12691 transitions. [2019-11-06 22:55:09,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:55:09,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 429 [2019-11-06 22:55:09,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:55:09,070 INFO L225 Difference]: With dead ends: 8334 [2019-11-06 22:55:09,070 INFO L226 Difference]: Without dead ends: 4870 [2019-11-06 22:55:09,084 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 867 GetRequests, 853 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:55:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4870 states. [2019-11-06 22:55:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4870 to 4862. [2019-11-06 22:55:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4862 states. [2019-11-06 22:55:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4862 states to 4862 states and 6833 transitions. [2019-11-06 22:55:09,236 INFO L78 Accepts]: Start accepts. Automaton has 4862 states and 6833 transitions. Word has length 429 [2019-11-06 22:55:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:55:09,237 INFO L462 AbstractCegarLoop]: Abstraction has 4862 states and 6833 transitions. [2019-11-06 22:55:09,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:55:09,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4862 states and 6833 transitions. [2019-11-06 22:55:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 530 [2019-11-06 22:55:09,252 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:55:09,252 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:09,458 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:55:09,458 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:55:09,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:55:09,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1907380526, now seen corresponding path program 1 times [2019-11-06 22:55:09,458 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:55:09,459 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091382320] [2019-11-06 22:55:09,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:55:09,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 107 proven. 240 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 22:55:10,207 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091382320] [2019-11-06 22:55:10,207 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006125040] [2019-11-06 22:55:10,207 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 22:55:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:55:10,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:55:10,380 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:55:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 380 proven. 2 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-06 22:55:10,541 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:55:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 204 proven. 115 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 22:55:10,891 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [43047255] [2019-11-06 22:55:10,897 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 530 [2019-11-06 22:55:10,967 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:55:10,968 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)