/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_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:56:03,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:56:03,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:56:03,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:56:03,383 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:56:03,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:56:03,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:56:03,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:56:03,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:56:03,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:56:03,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:56:03,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:56:03,392 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:56:03,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:56:03,394 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:56:03,395 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:56:03,397 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:56:03,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:56:03,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:56:03,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:56:03,406 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 22:56:03,420 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:56:03,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:56:03,421 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:56:03,421 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:56:03,422 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:56:03,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:56:03,422 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:56:03,422 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:56:03,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:56:03,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:56:03,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:56:03,423 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:56:03,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:56:03,423 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:56:03,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:56:03,424 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:56:03,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:56:03,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:56:03,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:56:03,425 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:56:03,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:56:03,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:56:03,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:56:03,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:56:03,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:56:03,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:56:03,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:56:03,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:56:03,427 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 22:56:03,742 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:56:03,756 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:56:03,760 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:56:03,761 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:56:03,762 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:56:03,763 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label56.c [2019-11-06 22:56:03,842 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfde03eb5/275d3e4a8e26423ab57dab7811751047/FLAG80eb2bc4f [2019-11-06 22:56:04,492 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:56:04,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label56.c [2019-11-06 22:56:04,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfde03eb5/275d3e4a8e26423ab57dab7811751047/FLAG80eb2bc4f [2019-11-06 22:56:04,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfde03eb5/275d3e4a8e26423ab57dab7811751047 [2019-11-06 22:56:04,665 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:56:04,668 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:56:04,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:04,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:56:04,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:56:04,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:04" (1/1) ... [2019-11-06 22:56:04,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@541a2f3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:04, skipping insertion in model container [2019-11-06 22:56:04,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:56:04" (1/1) ... [2019-11-06 22:56:04,688 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:56:04,769 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:56:05,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:05,693 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:56:06,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:56:06,182 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:56:06,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:06 WrapperNode [2019-11-06 22:56:06,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:56:06,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:56:06,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:56:06,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:56:06,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:06" (1/1) ... [2019-11-06 22:56:06,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:06" (1/1) ... [2019-11-06 22:56:06,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:06" (1/1) ... [2019-11-06 22:56:06,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:06" (1/1) ... [2019-11-06 22:56:06,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:06" (1/1) ... [2019-11-06 22:56:06,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:06" (1/1) ... [2019-11-06 22:56:06,325 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:06" (1/1) ... [2019-11-06 22:56:06,341 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:56:06,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:56:06,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:56:06,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:56:06,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:06" (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 22:56:06,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:56:06,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:56:06,405 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:56:06,405 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:56:06,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:56:06,405 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:56:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:56:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:56:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:56:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:56:06,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:56:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:56:06,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:56:08,527 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:56:08,528 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:56:08,534 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:08 BoogieIcfgContainer [2019-11-06 22:56:08,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:56:08,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:56:08,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:56:08,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:56:08,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:56:04" (1/3) ... [2019-11-06 22:56:08,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4021888e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:08, skipping insertion in model container [2019-11-06 22:56:08,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:56:06" (2/3) ... [2019-11-06 22:56:08,544 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4021888e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:56:08, skipping insertion in model container [2019-11-06 22:56:08,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:56:08" (3/3) ... [2019-11-06 22:56:08,546 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label56.c [2019-11-06 22:56:08,556 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:56:08,602 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:56:08,614 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:56:08,656 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:56:08,656 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:56:08,656 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:56:08,656 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:56:08,657 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:56:08,657 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:56:08,657 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:56:08,657 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:56:08,690 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:56:08,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 22:56:08,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:08,699 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] [2019-11-06 22:56:08,701 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:08,707 INFO L82 PathProgramCache]: Analyzing trace with hash -645226158, now seen corresponding path program 1 times [2019-11-06 22:56:08,717 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:08,718 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411491974] [2019-11-06 22:56:08,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:08,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:09,005 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 22:56:09,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411491974] [2019-11-06 22:56:09,006 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:09,007 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:56:09,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126115977] [2019-11-06 22:56:09,013 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:56:09,014 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:09,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:56:09,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:56:09,032 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:56:11,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:11,514 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:56:11,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:56:11,515 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-11-06 22:56:11,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:11,537 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:56:11,538 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:56:11,547 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 22:56:11,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:56:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:56:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:56:11,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-11-06 22:56:11,653 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 39 [2019-11-06 22:56:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:11,653 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-11-06 22:56:11,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:56:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-11-06 22:56:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 22:56:11,660 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:11,661 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:11,661 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:11,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:11,662 INFO L82 PathProgramCache]: Analyzing trace with hash 273083902, now seen corresponding path program 1 times [2019-11-06 22:56:11,662 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:11,662 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896447312] [2019-11-06 22:56:11,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:11,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896447312] [2019-11-06 22:56:11,939 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:56:11,940 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:56:11,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017444539] [2019-11-06 22:56:11,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:56:11,942 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:11,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:56:11,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:56:11,943 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-11-06 22:56:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:14,659 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-11-06 22:56:14,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:14,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 131 [2019-11-06 22:56:14,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:14,667 INFO L225 Difference]: With dead ends: 1730 [2019-11-06 22:56:14,668 INFO L226 Difference]: Without dead ends: 1054 [2019-11-06 22:56:14,670 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 22:56:14,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-11-06 22:56:14,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-11-06 22:56:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-11-06 22:56:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-11-06 22:56:14,719 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 131 [2019-11-06 22:56:14,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:14,719 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-11-06 22:56:14,719 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:56:14,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-11-06 22:56:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-11-06 22:56:14,726 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:14,726 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:56:14,727 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:14,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash 59762670, now seen corresponding path program 1 times [2019-11-06 22:56:14,728 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:14,728 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353433195] [2019-11-06 22:56:14,728 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 64 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:56:14,952 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353433195] [2019-11-06 22:56:14,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983135153] [2019-11-06 22:56:14,953 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 22:56:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:15,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:56:15,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:15,263 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-06 22:56:15,264 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:15,471 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 64 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:56:15,472 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:56:15,472 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:56:15,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756323830] [2019-11-06 22:56:15,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:15,474 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:15,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:15,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:56:15,475 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-11-06 22:56:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:18,549 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-11-06 22:56:18,550 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:56:18,550 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 241 [2019-11-06 22:56:18,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:18,559 INFO L225 Difference]: With dead ends: 2427 [2019-11-06 22:56:18,559 INFO L226 Difference]: Without dead ends: 1399 [2019-11-06 22:56:18,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 477 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:56:18,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-11-06 22:56:18,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-11-06 22:56:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-11-06 22:56:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-11-06 22:56:18,619 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 241 [2019-11-06 22:56:18,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:18,622 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-11-06 22:56:18,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-11-06 22:56:18,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2019-11-06 22:56:18,631 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:18,631 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 22:56:18,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:18,837 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:18,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:18,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1602962695, now seen corresponding path program 1 times [2019-11-06 22:56:18,839 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:18,839 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14317914] [2019-11-06 22:56:18,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 96 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:19,084 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14317914] [2019-11-06 22:56:19,084 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947124769] [2019-11-06 22:56:19,084 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 22:56:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:19,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:56:19,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2019-11-06 22:56:19,363 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 96 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:19,510 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:56:19,510 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-11-06 22:56:19,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537615092] [2019-11-06 22:56:19,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:19,511 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:19,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:19,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:56:19,512 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-11-06 22:56:22,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:22,627 INFO L93 Difference]: Finished difference Result 4243 states and 6811 transitions. [2019-11-06 22:56:22,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:56:22,631 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 316 [2019-11-06 22:56:22,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:22,647 INFO L225 Difference]: With dead ends: 4243 [2019-11-06 22:56:22,648 INFO L226 Difference]: Without dead ends: 2861 [2019-11-06 22:56:22,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 630 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:56:22,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2019-11-06 22:56:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2819. [2019-11-06 22:56:22,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-11-06 22:56:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4287 transitions. [2019-11-06 22:56:22,730 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4287 transitions. Word has length 316 [2019-11-06 22:56:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:22,731 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4287 transitions. [2019-11-06 22:56:22,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:22,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4287 transitions. [2019-11-06 22:56:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2019-11-06 22:56:22,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:22,738 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, 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, 1, 1, 1, 1, 1, 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 22:56:22,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:22,942 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:22,943 INFO L82 PathProgramCache]: Analyzing trace with hash -602567729, now seen corresponding path program 1 times [2019-11-06 22:56:22,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:22,944 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469287276] [2019-11-06 22:56:22,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:22,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 96 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:23,126 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469287276] [2019-11-06 22:56:23,126 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567132389] [2019-11-06 22:56:23,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:23,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:56:23,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2019-11-06 22:56:23,409 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 96 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-06 22:56:23,563 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:56:23,563 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:56:23,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485130293] [2019-11-06 22:56:23,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:56:23,564 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:56:23,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:56:23,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:56:23,565 INFO L87 Difference]: Start difference. First operand 2819 states and 4287 transitions. Second operand 5 states. [2019-11-06 22:56:26,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:56:26,149 INFO L93 Difference]: Finished difference Result 8487 states and 13372 transitions. [2019-11-06 22:56:26,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:56:26,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 320 [2019-11-06 22:56:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:56:26,186 INFO L225 Difference]: With dead ends: 8487 [2019-11-06 22:56:26,186 INFO L226 Difference]: Without dead ends: 5674 [2019-11-06 22:56:26,195 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 635 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:56:26,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-11-06 22:56:26,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-11-06 22:56:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-11-06 22:56:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7783 transitions. [2019-11-06 22:56:26,351 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7783 transitions. Word has length 320 [2019-11-06 22:56:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:56:26,352 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7783 transitions. [2019-11-06 22:56:26,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:56:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7783 transitions. [2019-11-06 22:56:26,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-11-06 22:56:26,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:56:26,361 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:56:26,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:26,565 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:56:26,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:56:26,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1970977130, now seen corresponding path program 1 times [2019-11-06 22:56:26,566 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:56:26,567 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818640508] [2019-11-06 22:56:26,567 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:56:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:28,005 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818640508] [2019-11-06 22:56:28,006 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772574058] [2019-11-06 22:56:28,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:56:28,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:56:28,132 INFO L256 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:56:28,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:56:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:28,283 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:56:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:56:28,556 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1969609745] [2019-11-06 22:56:28,562 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 346 [2019-11-06 22:56:28,638 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:56:28,639 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:56:33,906 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.