/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:38:34,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:38:34,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:38:34,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:38:34,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:38:34,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:38:34,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:38:34,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:38:34,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:38:34,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:38:34,692 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:38:34,697 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:38:34,701 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:38:34,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:38:34,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:38:34,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:38:34,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:38:34,718 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:38:34,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:38:34,720 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:38:34,720 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 22:38:34,750 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:38:34,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:38:34,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:38:34,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:38:34,752 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:38:34,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:38:34,752 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:38:34,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:38:34,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:38:34,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:38:34,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:38:34,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:38:34,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:38:34,753 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:38:34,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:38:34,759 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:38:34,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:38:34,760 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:38:34,760 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:38:34,760 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:38:34,760 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:38:34,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:38:34,761 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:38:34,761 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:38:34,761 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:38:34,761 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:38:34,761 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:38:34,762 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:38:34,764 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 22:38:35,065 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:38:35,082 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:38:35,087 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:38:35,090 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:38:35,090 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:38:35,091 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label40.c [2019-11-06 22:38:35,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c80866c/3143ccbefc8b4f5499470128da49f57f/FLAG515075c51 [2019-11-06 22:38:35,801 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:38:35,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label40.c [2019-11-06 22:38:35,821 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c80866c/3143ccbefc8b4f5499470128da49f57f/FLAG515075c51 [2019-11-06 22:38:35,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1c80866c/3143ccbefc8b4f5499470128da49f57f [2019-11-06 22:38:36,006 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:38:36,008 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:38:36,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:38:36,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:38:36,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:38:36,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:35" (1/1) ... [2019-11-06 22:38:36,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab07c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:36, skipping insertion in model container [2019-11-06 22:38:36,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:38:35" (1/1) ... [2019-11-06 22:38:36,025 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:38:36,113 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:38:37,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:38:37,023 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:38:37,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:38:37,432 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:38:37,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:37 WrapperNode [2019-11-06 22:38:37,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:38:37,434 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:38:37,434 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:38:37,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:38:37,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:37" (1/1) ... [2019-11-06 22:38:37,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:37" (1/1) ... [2019-11-06 22:38:37,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:37" (1/1) ... [2019-11-06 22:38:37,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:37" (1/1) ... [2019-11-06 22:38:37,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:37" (1/1) ... [2019-11-06 22:38:37,590 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:37" (1/1) ... [2019-11-06 22:38:37,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:37" (1/1) ... [2019-11-06 22:38:37,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:38:37,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:38:37,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:38:37,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:38:37,622 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:37" (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 22:38:37,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:38:37,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:38:37,694 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:38:37,694 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:38:37,694 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:38:37,694 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:38:37,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:38:37,695 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:38:37,696 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:38:37,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:38:37,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:38:39,801 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:38:39,802 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:38:39,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:38:39 BoogieIcfgContainer [2019-11-06 22:38:39,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:38:39,804 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:38:39,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:38:39,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:38:39,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:38:35" (1/3) ... [2019-11-06 22:38:39,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a265a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:38:39, skipping insertion in model container [2019-11-06 22:38:39,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:38:37" (2/3) ... [2019-11-06 22:38:39,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a265a30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:38:39, skipping insertion in model container [2019-11-06 22:38:39,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:38:39" (3/3) ... [2019-11-06 22:38:39,814 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label40.c [2019-11-06 22:38:39,825 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:38:39,833 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:38:39,845 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:38:39,874 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:38:39,874 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:38:39,874 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:38:39,874 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:38:39,874 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:38:39,875 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:38:39,875 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:38:39,875 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:38:39,905 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-11-06 22:38:39,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-11-06 22:38:39,935 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:39,939 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:39,942 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:39,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:39,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1898680923, now seen corresponding path program 1 times [2019-11-06 22:38:39,959 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:39,959 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849855705] [2019-11-06 22:38:39,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:40,940 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 22:38:40,941 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849855705] [2019-11-06 22:38:40,942 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:40,942 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:38:40,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557171834] [2019-11-06 22:38:40,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:38:40,952 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:40,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:38:40,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:38:40,969 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 4 states. [2019-11-06 22:38:43,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:43,260 INFO L93 Difference]: Finished difference Result 1070 states and 1920 transitions. [2019-11-06 22:38:43,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:38:43,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 190 [2019-11-06 22:38:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:43,287 INFO L225 Difference]: With dead ends: 1070 [2019-11-06 22:38:43,287 INFO L226 Difference]: Without dead ends: 677 [2019-11-06 22:38:43,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 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 22:38:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2019-11-06 22:38:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 458. [2019-11-06 22:38:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2019-11-06 22:38:43,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 752 transitions. [2019-11-06 22:38:43,391 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 752 transitions. Word has length 190 [2019-11-06 22:38:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:43,393 INFO L462 AbstractCegarLoop]: Abstraction has 458 states and 752 transitions. [2019-11-06 22:38:43,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:38:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 752 transitions. [2019-11-06 22:38:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-11-06 22:38:43,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:43,398 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:43,398 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:43,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:43,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1068911710, now seen corresponding path program 1 times [2019-11-06 22:38:43,399 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:43,399 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104325820] [2019-11-06 22:38:43,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:43,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:43,760 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104325820] [2019-11-06 22:38:43,760 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:43,760 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:38:43,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202935076] [2019-11-06 22:38:43,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:38:43,772 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:43,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:38:43,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:38:43,774 INFO L87 Difference]: Start difference. First operand 458 states and 752 transitions. Second operand 6 states. [2019-11-06 22:38:45,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:45,254 INFO L93 Difference]: Finished difference Result 1354 states and 2256 transitions. [2019-11-06 22:38:45,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:38:45,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 217 [2019-11-06 22:38:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:45,269 INFO L225 Difference]: With dead ends: 1354 [2019-11-06 22:38:45,269 INFO L226 Difference]: Without dead ends: 902 [2019-11-06 22:38:45,272 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:38:45,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2019-11-06 22:38:45,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 885. [2019-11-06 22:38:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 885 states. [2019-11-06 22:38:45,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1304 transitions. [2019-11-06 22:38:45,332 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1304 transitions. Word has length 217 [2019-11-06 22:38:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:45,333 INFO L462 AbstractCegarLoop]: Abstraction has 885 states and 1304 transitions. [2019-11-06 22:38:45,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:38:45,333 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1304 transitions. [2019-11-06 22:38:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-11-06 22:38:45,338 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:45,338 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:38:45,338 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:45,339 INFO L82 PathProgramCache]: Analyzing trace with hash 880538771, now seen corresponding path program 1 times [2019-11-06 22:38:45,339 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:45,339 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126794909] [2019-11-06 22:38:45,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:45,835 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126794909] [2019-11-06 22:38:45,835 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:38:45,835 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:38:45,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519599597] [2019-11-06 22:38:45,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:38:45,836 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:38:45,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:38:45,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:38:45,837 INFO L87 Difference]: Start difference. First operand 885 states and 1304 transitions. Second operand 4 states. [2019-11-06 22:38:47,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:38:47,643 INFO L93 Difference]: Finished difference Result 3250 states and 4891 transitions. [2019-11-06 22:38:47,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:38:47,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 235 [2019-11-06 22:38:47,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:38:47,661 INFO L225 Difference]: With dead ends: 3250 [2019-11-06 22:38:47,662 INFO L226 Difference]: Without dead ends: 2371 [2019-11-06 22:38:47,669 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 22:38:47,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2371 states. [2019-11-06 22:38:47,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2371 to 2352. [2019-11-06 22:38:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2352 states. [2019-11-06 22:38:47,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 3372 transitions. [2019-11-06 22:38:47,771 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 3372 transitions. Word has length 235 [2019-11-06 22:38:47,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:38:47,780 INFO L462 AbstractCegarLoop]: Abstraction has 2352 states and 3372 transitions. [2019-11-06 22:38:47,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:38:47,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 3372 transitions. [2019-11-06 22:38:47,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-11-06 22:38:47,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:38:47,794 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:38:47,794 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:38:47,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:38:47,795 INFO L82 PathProgramCache]: Analyzing trace with hash -597819644, now seen corresponding path program 1 times [2019-11-06 22:38:47,795 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:38:47,795 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654750982] [2019-11-06 22:38:47,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:38:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:48,010 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654750982] [2019-11-06 22:38:48,010 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431115215] [2019-11-06 22:38:48,010 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 22:38:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:38:48,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:38:48,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:38:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:48,483 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:38:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:38:48,628 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1053551020] [2019-11-06 22:38:48,635 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 274 [2019-11-06 22:38:48,696 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:38:48,696 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)