/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/Problem18_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:57:20,336 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:57:20,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:57:20,358 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:57:20,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:57:20,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:57:20,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:57:20,373 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:57:20,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:57:20,381 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:57:20,382 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:57:20,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:57:20,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:57:20,386 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:57:20,388 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:57:20,390 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:57:20,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:57:20,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:57:20,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:57:20,400 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:57:20,404 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:57:20,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:57:20,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:57:20,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:57:20,412 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:57:20,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:57:20,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:57:20,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:57:20,425 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 22:57:20,465 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:57:20,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:57:20,467 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:57:20,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:57:20,467 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:57:20,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:57:20,467 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:57:20,468 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:57:20,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:57:20,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:57:20,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:57:20,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:57:20,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:57:20,469 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:57:20,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:57:20,469 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:57:20,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:57:20,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:57:20,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:57:20,473 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:57:20,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:57:20,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:57:20,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:57:20,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:57:20,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:57:20,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:57:20,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:57:20,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:57:20,476 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 22:57:20,791 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:57:20,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:57:20,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:57:20,810 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:57:20,811 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:57:20,811 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label25.c [2019-11-06 22:57:20,882 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/add59a433/5905fd95764e434685cb7220b615e189/FLAG78eba92f5 [2019-11-06 22:57:21,582 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:57:21,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label25.c [2019-11-06 22:57:21,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/add59a433/5905fd95764e434685cb7220b615e189/FLAG78eba92f5 [2019-11-06 22:57:21,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/add59a433/5905fd95764e434685cb7220b615e189 [2019-11-06 22:57:21,731 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:57:21,733 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:57:21,737 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:21,738 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:57:21,741 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:57:21,743 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:21" (1/1) ... [2019-11-06 22:57:21,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@624fecc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:21, skipping insertion in model container [2019-11-06 22:57:21,746 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:21" (1/1) ... [2019-11-06 22:57:21,755 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:57:21,881 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:57:23,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:23,074 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:57:23,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:23,576 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:57:23,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:23 WrapperNode [2019-11-06 22:57:23,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:23,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:57:23,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:57:23,578 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:57:23,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:23" (1/1) ... [2019-11-06 22:57:23,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:23" (1/1) ... [2019-11-06 22:57:23,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:23" (1/1) ... [2019-11-06 22:57:23,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:23" (1/1) ... [2019-11-06 22:57:23,739 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:23" (1/1) ... [2019-11-06 22:57:23,768 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:23" (1/1) ... [2019-11-06 22:57:23,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:23" (1/1) ... [2019-11-06 22:57:23,804 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:57:23,805 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:57:23,805 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:57:23,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:57:23,813 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:23" (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 22:57:23,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:57:23,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:57:23,889 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:57:23,890 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:57:23,890 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:57:23,891 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:57:23,891 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:57:23,892 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:57:23,892 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:57:23,893 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:57:23,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:57:23,894 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:57:23,896 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:57:23,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:57:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:57:27,607 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:57:27,607 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:57:27,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:27 BoogieIcfgContainer [2019-11-06 22:57:27,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:57:27,614 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:57:27,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:57:27,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:57:27,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:57:21" (1/3) ... [2019-11-06 22:57:27,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d496f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:27, skipping insertion in model container [2019-11-06 22:57:27,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:23" (2/3) ... [2019-11-06 22:57:27,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d496f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:27, skipping insertion in model container [2019-11-06 22:57:27,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:27" (3/3) ... [2019-11-06 22:57:27,630 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label25.c [2019-11-06 22:57:27,643 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:57:27,653 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:57:27,665 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:57:27,708 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:57:27,708 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:57:27,709 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:57:27,709 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:57:27,709 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:57:27,709 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:57:27,709 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:57:27,709 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:57:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:57:27,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-06 22:57:27,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:27,761 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] [2019-11-06 22:57:27,763 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:27,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:27,769 INFO L82 PathProgramCache]: Analyzing trace with hash 806765881, now seen corresponding path program 1 times [2019-11-06 22:57:27,778 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:27,779 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914546944] [2019-11-06 22:57:27,779 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:27,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:28,107 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 22:57:28,107 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914546944] [2019-11-06 22:57:28,108 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:28,109 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:57:28,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662671119] [2019-11-06 22:57:28,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:57:28,117 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:28,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:57:28,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:57:28,135 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 4 states. [2019-11-06 22:57:35,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:35,104 INFO L93 Difference]: Finished difference Result 2970 states and 5743 transitions. [2019-11-06 22:57:35,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:57:35,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-11-06 22:57:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:35,175 INFO L225 Difference]: With dead ends: 2970 [2019-11-06 22:57:35,175 INFO L226 Difference]: Without dead ends: 2114 [2019-11-06 22:57:35,196 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:57:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2019-11-06 22:57:35,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1412. [2019-11-06 22:57:35,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-11-06 22:57:35,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2246 transitions. [2019-11-06 22:57:35,381 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2246 transitions. Word has length 30 [2019-11-06 22:57:35,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:35,382 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2246 transitions. [2019-11-06 22:57:35,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:57:35,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2246 transitions. [2019-11-06 22:57:35,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 22:57:35,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:35,390 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:35,391 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:35,391 INFO L82 PathProgramCache]: Analyzing trace with hash -597433259, now seen corresponding path program 1 times [2019-11-06 22:57:35,391 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:35,392 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572403775] [2019-11-06 22:57:35,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:35,599 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572403775] [2019-11-06 22:57:35,600 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:35,600 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:57:35,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742209850] [2019-11-06 22:57:35,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:57:35,604 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:35,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:57:35,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:57:35,606 INFO L87 Difference]: Start difference. First operand 1412 states and 2246 transitions. Second operand 5 states. [2019-11-06 22:57:41,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:41,387 INFO L93 Difference]: Finished difference Result 4294 states and 6875 transitions. [2019-11-06 22:57:41,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:41,388 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2019-11-06 22:57:41,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:41,404 INFO L225 Difference]: With dead ends: 4294 [2019-11-06 22:57:41,405 INFO L226 Difference]: Without dead ends: 2888 [2019-11-06 22:57:41,409 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:57:41,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-11-06 22:57:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2866. [2019-11-06 22:57:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2866 states. [2019-11-06 22:57:41,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 4300 transitions. [2019-11-06 22:57:41,474 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 4300 transitions. Word has length 99 [2019-11-06 22:57:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:41,475 INFO L462 AbstractCegarLoop]: Abstraction has 2866 states and 4300 transitions. [2019-11-06 22:57:41,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:57:41,475 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 4300 transitions. [2019-11-06 22:57:41,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-11-06 22:57:41,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:41,477 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:41,478 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:41,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:41,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1545608973, now seen corresponding path program 1 times [2019-11-06 22:57:41,478 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:41,479 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740736642] [2019-11-06 22:57:41,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:41,629 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:41,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740736642] [2019-11-06 22:57:41,630 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:41,630 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:41,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444607360] [2019-11-06 22:57:41,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:41,632 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:41,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:41,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:41,632 INFO L87 Difference]: Start difference. First operand 2866 states and 4300 transitions. Second operand 6 states. [2019-11-06 22:57:47,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:47,200 INFO L93 Difference]: Finished difference Result 8752 states and 13417 transitions. [2019-11-06 22:57:47,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:47,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2019-11-06 22:57:47,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:47,246 INFO L225 Difference]: With dead ends: 8752 [2019-11-06 22:57:47,247 INFO L226 Difference]: Without dead ends: 5892 [2019-11-06 22:57:47,254 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 22:57:47,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2019-11-06 22:57:47,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5837. [2019-11-06 22:57:47,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5837 states. [2019-11-06 22:57:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5837 states to 5837 states and 8642 transitions. [2019-11-06 22:57:47,468 INFO L78 Accepts]: Start accepts. Automaton has 5837 states and 8642 transitions. Word has length 103 [2019-11-06 22:57:47,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:47,470 INFO L462 AbstractCegarLoop]: Abstraction has 5837 states and 8642 transitions. [2019-11-06 22:57:47,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:47,470 INFO L276 IsEmpty]: Start isEmpty. Operand 5837 states and 8642 transitions. [2019-11-06 22:57:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 22:57:47,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:47,483 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:47,483 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:47,484 INFO L82 PathProgramCache]: Analyzing trace with hash 830451652, now seen corresponding path program 1 times [2019-11-06 22:57:47,484 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:47,484 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994103372] [2019-11-06 22:57:47,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:47,717 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994103372] [2019-11-06 22:57:47,717 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:47,717 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:57:47,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125491152] [2019-11-06 22:57:47,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:57:47,720 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:47,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:57:47,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:57:47,720 INFO L87 Difference]: Start difference. First operand 5837 states and 8642 transitions. Second operand 6 states. [2019-11-06 22:57:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:57:53,197 INFO L93 Difference]: Finished difference Result 14683 states and 22165 transitions. [2019-11-06 22:57:53,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:57:53,197 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2019-11-06 22:57:53,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:57:53,241 INFO L225 Difference]: With dead ends: 14683 [2019-11-06 22:57:53,242 INFO L226 Difference]: Without dead ends: 8852 [2019-11-06 22:57:53,258 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 22:57:53,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2019-11-06 22:57:53,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 8798. [2019-11-06 22:57:53,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8798 states. [2019-11-06 22:57:53,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8798 states to 8798 states and 12610 transitions. [2019-11-06 22:57:53,477 INFO L78 Accepts]: Start accepts. Automaton has 8798 states and 12610 transitions. Word has length 124 [2019-11-06 22:57:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:57:53,573 INFO L462 AbstractCegarLoop]: Abstraction has 8798 states and 12610 transitions. [2019-11-06 22:57:53,573 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:57:53,573 INFO L276 IsEmpty]: Start isEmpty. Operand 8798 states and 12610 transitions. [2019-11-06 22:57:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-11-06 22:57:53,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:53,578 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:57:53,578 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:53,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:53,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1767493658, now seen corresponding path program 1 times [2019-11-06 22:57:53,579 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:53,579 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522310722] [2019-11-06 22:57:53,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:53,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:53,779 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522310722] [2019-11-06 22:57:53,779 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757793309] [2019-11-06 22:57:53,779 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 22:57:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:53,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:57:53,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:57:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:54,015 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:57:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:57:54,184 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2068755854] [2019-11-06 22:57:54,192 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 226 [2019-11-06 22:57:54,256 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:57:54,256 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)