/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/Problem01_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:28:22,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:28:22,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:28:22,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:28:22,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:28:22,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:28:22,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:28:22,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:28:22,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:28:22,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:28:22,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:28:22,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:28:22,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:28:22,075 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:28:22,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:28:22,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:28:22,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:28:22,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:28:22,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:28:22,091 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:28:22,092 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 22:28:22,118 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:28:22,118 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:28:22,119 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:28:22,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:28:22,119 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:28:22,120 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:28:22,120 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:28:22,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:28:22,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:28:22,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:28:22,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:28:22,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:28:22,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:28:22,121 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:28:22,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:28:22,121 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:28:22,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:28:22,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:28:22,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:28:22,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:28:22,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:28:22,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:28:22,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:28:22,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:28:22,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:28:22,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:28:22,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:28:22,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:28:22,124 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 22:28:22,397 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:28:22,417 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:28:22,421 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:28:22,423 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:28:22,423 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:28:22,424 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label07.c [2019-11-06 22:28:22,497 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceffd5120/2170c4ae51bf4942a8df1a330d4f9bf9/FLAG6b7667442 [2019-11-06 22:28:23,066 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:28:23,067 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label07.c [2019-11-06 22:28:23,078 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceffd5120/2170c4ae51bf4942a8df1a330d4f9bf9/FLAG6b7667442 [2019-11-06 22:28:23,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ceffd5120/2170c4ae51bf4942a8df1a330d4f9bf9 [2019-11-06 22:28:23,300 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:28:23,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:28:23,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:28:23,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:28:23,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:28:23,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:28:23" (1/1) ... [2019-11-06 22:28:23,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2426b6c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:23, skipping insertion in model container [2019-11-06 22:28:23,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:28:23" (1/1) ... [2019-11-06 22:28:23,317 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:28:23,379 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:28:23,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:28:23,776 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:28:23,989 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:28:24,006 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:28:24,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:24 WrapperNode [2019-11-06 22:28:24,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:28:24,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:28:24,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:28:24,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:28:24,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:24" (1/1) ... [2019-11-06 22:28:24,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:24" (1/1) ... [2019-11-06 22:28:24,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:24" (1/1) ... [2019-11-06 22:28:24,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:24" (1/1) ... [2019-11-06 22:28:24,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:24" (1/1) ... [2019-11-06 22:28:24,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:24" (1/1) ... [2019-11-06 22:28:24,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:24" (1/1) ... [2019-11-06 22:28:24,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:28:24,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:28:24,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:28:24,144 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:28:24,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:24" (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 22:28:24,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:28:24,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:28:24,221 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:28:24,221 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:28:24,222 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:28:24,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:28:24,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:28:24,224 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:28:24,224 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:28:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:28:24,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:28:25,396 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:28:25,397 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:28:25,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:28:25 BoogieIcfgContainer [2019-11-06 22:28:25,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:28:25,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:28:25,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:28:25,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:28:25,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:28:23" (1/3) ... [2019-11-06 22:28:25,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7db0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:28:25, skipping insertion in model container [2019-11-06 22:28:25,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:28:24" (2/3) ... [2019-11-06 22:28:25,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d7db0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:28:25, skipping insertion in model container [2019-11-06 22:28:25,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:28:25" (3/3) ... [2019-11-06 22:28:25,413 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label07.c [2019-11-06 22:28:25,425 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:28:25,434 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:28:25,446 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:28:25,482 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:28:25,483 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:28:25,483 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:28:25,483 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:28:25,483 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:28:25,484 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:28:25,484 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:28:25,484 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:28:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:28:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 22:28:25,538 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:28:25,539 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] [2019-11-06 22:28:25,540 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:28:25,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:28:25,545 INFO L82 PathProgramCache]: Analyzing trace with hash -897711290, now seen corresponding path program 1 times [2019-11-06 22:28:25,554 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:28:25,555 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444936067] [2019-11-06 22:28:25,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:28:25,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:26,026 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 22:28:26,027 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444936067] [2019-11-06 22:28:26,028 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:28:26,028 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:28:26,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424189439] [2019-11-06 22:28:26,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:28:26,038 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:28:26,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:28:26,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:28:26,059 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:28:26,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:28:26,918 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:28:26,918 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:28:26,920 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2019-11-06 22:28:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:28:26,935 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:28:26,935 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:28:26,941 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:28:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:28:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:28:27,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:28:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-11-06 22:28:27,009 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 110 [2019-11-06 22:28:27,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:28:27,010 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-11-06 22:28:27,010 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:28:27,010 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-11-06 22:28:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 22:28:27,014 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:28:27,014 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:28:27,015 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:28:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:28:27,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1715018595, now seen corresponding path program 1 times [2019-11-06 22:28:27,016 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:28:27,016 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14269890] [2019-11-06 22:28:27,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:28:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:28:27,120 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14269890] [2019-11-06 22:28:27,120 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:28:27,121 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:28:27,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377642299] [2019-11-06 22:28:27,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:28:27,123 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:28:27,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:28:27,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:28:27,124 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-11-06 22:28:27,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:28:27,984 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-11-06 22:28:27,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:28:27,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 120 [2019-11-06 22:28:27,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:28:27,996 INFO L225 Difference]: With dead ends: 840 [2019-11-06 22:28:27,997 INFO L226 Difference]: Without dead ends: 568 [2019-11-06 22:28:27,998 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 22:28:28,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-06 22:28:28,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-11-06 22:28:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-11-06 22:28:28,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 784 transitions. [2019-11-06 22:28:28,069 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 784 transitions. Word has length 120 [2019-11-06 22:28:28,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:28:28,070 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 784 transitions. [2019-11-06 22:28:28,072 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:28:28,072 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 784 transitions. [2019-11-06 22:28:28,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-06 22:28:28,082 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:28:28,082 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:28:28,083 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:28:28,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:28:28,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1875176562, now seen corresponding path program 1 times [2019-11-06 22:28:28,083 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:28:28,084 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746083564] [2019-11-06 22:28:28,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:28:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:28:28,239 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746083564] [2019-11-06 22:28:28,240 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854306538] [2019-11-06 22:28:28,240 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 22:28:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:28,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:28:28,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:28:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:28:28,460 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:28:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 22:28:28,546 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:28:28,547 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-11-06 22:28:28,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071823836] [2019-11-06 22:28:28,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:28:28,555 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:28:28,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:28:28,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:28:28,556 INFO L87 Difference]: Start difference. First operand 556 states and 784 transitions. Second operand 3 states. [2019-11-06 22:28:29,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:28:29,143 INFO L93 Difference]: Finished difference Result 1650 states and 2377 transitions. [2019-11-06 22:28:29,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:28:29,144 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 144 [2019-11-06 22:28:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:28:29,151 INFO L225 Difference]: With dead ends: 1650 [2019-11-06 22:28:29,151 INFO L226 Difference]: Without dead ends: 1100 [2019-11-06 22:28:29,153 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 286 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:28:29,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2019-11-06 22:28:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1100. [2019-11-06 22:28:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1100 states. [2019-11-06 22:28:29,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1508 transitions. [2019-11-06 22:28:29,193 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1508 transitions. Word has length 144 [2019-11-06 22:28:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:28:29,194 INFO L462 AbstractCegarLoop]: Abstraction has 1100 states and 1508 transitions. [2019-11-06 22:28:29,194 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:28:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1508 transitions. [2019-11-06 22:28:29,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-06 22:28:29,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:28:29,200 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:28:29,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:28:29,404 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:28:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:28:29,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2013677690, now seen corresponding path program 1 times [2019-11-06 22:28:29,405 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:28:29,405 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430124384] [2019-11-06 22:28:29,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:28:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:28:29,620 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430124384] [2019-11-06 22:28:29,620 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164738283] [2019-11-06 22:28:29,621 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 22:28:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:28:29,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:28:29,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:28:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:28:29,843 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:28:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:28:29,937 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [273425462] [2019-11-06 22:28:29,943 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 194 [2019-11-06 22:28:30,002 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:28:30,003 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)