/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/Problem11_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:45:21,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:45:21,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:45:21,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:45:21,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:45:21,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:45:21,756 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:45:21,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:45:21,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:45:21,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:45:21,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:45:21,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-06 22:45:21,803 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:45:21,807 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:45:21,808 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:45:21,808 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 22:45:21,831 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:45:21,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:45:21,833 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:45:21,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:45:21,833 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:45:21,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:45:21,834 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:45:21,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:45:21,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:45:21,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:45:21,835 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:45:21,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:45:21,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:45:21,836 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:45:21,836 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:45:21,836 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:45:21,836 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:45:21,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:45:21,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:45:21,837 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:45:21,837 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:45:21,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:45:21,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:45:21,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:45:21,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:45:21,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:45:21,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:45:21,839 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:45:21,839 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 22:45:22,105 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:45:22,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:45:22,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:45:22,127 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:45:22,127 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:45:22,128 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label09.c [2019-11-06 22:45:22,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba8ef7c2/8f5bfc3f3b1e417dbdf7b247e34ab03c/FLAG06f57d3c2 [2019-11-06 22:45:22,824 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:45:22,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label09.c [2019-11-06 22:45:22,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba8ef7c2/8f5bfc3f3b1e417dbdf7b247e34ab03c/FLAG06f57d3c2 [2019-11-06 22:45:23,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ba8ef7c2/8f5bfc3f3b1e417dbdf7b247e34ab03c [2019-11-06 22:45:23,052 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:45:23,054 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:45:23,055 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:45:23,055 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:45:23,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:45:23,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:23" (1/1) ... [2019-11-06 22:45:23,062 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3f1635 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:23, skipping insertion in model container [2019-11-06 22:45:23,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:23" (1/1) ... [2019-11-06 22:45:23,069 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:45:23,131 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:45:24,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:45:24,011 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:45:24,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:45:24,156 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:45:24,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:24 WrapperNode [2019-11-06 22:45:24,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:45:24,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:45:24,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:45:24,158 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:45:24,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:24" (1/1) ... [2019-11-06 22:45:24,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:24" (1/1) ... [2019-11-06 22:45:24,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:24" (1/1) ... [2019-11-06 22:45:24,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:24" (1/1) ... [2019-11-06 22:45:24,269 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:24" (1/1) ... [2019-11-06 22:45:24,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:24" (1/1) ... [2019-11-06 22:45:24,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:24" (1/1) ... [2019-11-06 22:45:24,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:45:24,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:45:24,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:45:24,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:45:24,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:24" (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 22:45:24,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:45:24,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:45:24,405 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:45:24,405 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:45:24,405 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:45:24,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:45:24,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:45:24,406 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:45:24,406 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:45:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:45:24,407 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:45:26,645 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:45:26,646 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:45:26,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:26 BoogieIcfgContainer [2019-11-06 22:45:26,650 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:45:26,691 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:45:26,691 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:45:26,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:45:26,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:23" (1/3) ... [2019-11-06 22:45:26,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64815802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:26, skipping insertion in model container [2019-11-06 22:45:26,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:24" (2/3) ... [2019-11-06 22:45:26,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64815802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:26, skipping insertion in model container [2019-11-06 22:45:26,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:26" (3/3) ... [2019-11-06 22:45:26,705 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label09.c [2019-11-06 22:45:26,724 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:45:26,736 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:45:26,748 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:45:26,779 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:45:26,779 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:45:26,779 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:45:26,779 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:45:26,780 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:45:26,780 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:45:26,780 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:45:26,780 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:45:26,808 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 22:45:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-06 22:45:26,818 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:26,820 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:45:26,822 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:26,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:26,829 INFO L82 PathProgramCache]: Analyzing trace with hash -869319573, now seen corresponding path program 1 times [2019-11-06 22:45:26,840 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:26,840 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913191414] [2019-11-06 22:45:26,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:27,233 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 22:45:27,234 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913191414] [2019-11-06 22:45:27,235 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:27,235 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:45:27,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64500584] [2019-11-06 22:45:27,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:45:27,243 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:27,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:45:27,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:45:27,261 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-11-06 22:45:29,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:29,537 INFO L93 Difference]: Finished difference Result 981 states and 1757 transitions. [2019-11-06 22:45:29,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:45:29,539 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-11-06 22:45:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:29,562 INFO L225 Difference]: With dead ends: 981 [2019-11-06 22:45:29,562 INFO L226 Difference]: Without dead ends: 622 [2019-11-06 22:45:29,573 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 22:45:29,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-11-06 22:45:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-11-06 22:45:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-11-06 22:45:29,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-11-06 22:45:29,675 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 72 [2019-11-06 22:45:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:29,676 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-11-06 22:45:29,676 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:45:29,676 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-11-06 22:45:29,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-11-06 22:45:29,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:29,685 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:45:29,686 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:29,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1437675110, now seen corresponding path program 1 times [2019-11-06 22:45:29,687 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:29,687 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852991375] [2019-11-06 22:45:29,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:29,962 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:29,963 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852991375] [2019-11-06 22:45:29,963 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:45:29,963 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:45:29,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578157667] [2019-11-06 22:45:29,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:45:29,971 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:29,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:45:29,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:45:29,972 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-11-06 22:45:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:32,138 INFO L93 Difference]: Finished difference Result 1837 states and 2643 transitions. [2019-11-06 22:45:32,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:45:32,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-11-06 22:45:32,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:32,147 INFO L225 Difference]: With dead ends: 1837 [2019-11-06 22:45:32,147 INFO L226 Difference]: Without dead ends: 1221 [2019-11-06 22:45:32,149 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:45:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-11-06 22:45:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-11-06 22:45:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-11-06 22:45:32,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-11-06 22:45:32,208 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 152 [2019-11-06 22:45:32,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:32,209 INFO L462 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-11-06 22:45:32,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:45:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-11-06 22:45:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-06 22:45:32,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:32,221 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 22:45:32,224 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:32,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:32,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1147537460, now seen corresponding path program 1 times [2019-11-06 22:45:32,225 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:32,225 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790720061] [2019-11-06 22:45:32,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:32,593 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 60 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:32,594 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790720061] [2019-11-06 22:45:32,595 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62869819] [2019-11-06 22:45:32,595 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 22:45:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:32,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:45:32,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:32,915 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:33,000 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:45:33,000 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [8] total 10 [2019-11-06 22:45:33,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331925187] [2019-11-06 22:45:33,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:45:33,008 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:45:33,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:45:33,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:45:33,009 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 4 states. [2019-11-06 22:45:34,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:45:34,856 INFO L93 Difference]: Finished difference Result 4530 states and 6248 transitions. [2019-11-06 22:45:34,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:45:34,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 203 [2019-11-06 22:45:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:45:34,878 INFO L225 Difference]: With dead ends: 4530 [2019-11-06 22:45:34,879 INFO L226 Difference]: Without dead ends: 3326 [2019-11-06 22:45:34,883 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:45:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2019-11-06 22:45:34,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2739. [2019-11-06 22:45:34,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2019-11-06 22:45:35,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 3736 transitions. [2019-11-06 22:45:35,001 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 3736 transitions. Word has length 203 [2019-11-06 22:45:35,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:45:35,003 INFO L462 AbstractCegarLoop]: Abstraction has 2739 states and 3736 transitions. [2019-11-06 22:45:35,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:45:35,003 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 3736 transitions. [2019-11-06 22:45:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2019-11-06 22:45:35,016 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:45:35,017 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:45:35,229 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:45:35,229 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:45:35,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:45:35,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1992228476, now seen corresponding path program 1 times [2019-11-06 22:45:35,230 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:45:35,231 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082466862] [2019-11-06 22:45:35,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:45:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 7 proven. 129 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-06 22:45:35,783 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082466862] [2019-11-06 22:45:35,783 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490444866] [2019-11-06 22:45:35,783 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 22:45:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:45:35,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:45:35,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:45:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:36,083 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:45:36,232 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:45:36,234 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:45:36,240 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 22:45:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:45:36,468 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1594014718] [2019-11-06 22:45:36,473 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 285 [2019-11-06 22:45:36,521 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:45:36,521 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)