java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:09:19,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:09:19,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:09:19,935 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:09:19,936 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:09:19,937 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:09:19,938 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:09:19,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:09:19,942 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:09:19,943 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:09:19,944 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:09:19,945 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:09:19,945 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:09:19,946 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:09:19,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:09:19,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:09:19,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:09:19,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:09:19,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:09:19,961 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:09:19,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:09:19,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:09:19,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:09:19,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:09:19,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:09:19,984 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:09:19,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:09:19,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:09:19,990 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 [2019-10-15 00:09:20,018 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:09:20,018 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:09:20,019 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:09:20,020 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:09:20,020 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:09:20,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:09:20,020 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:09:20,020 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:09:20,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:09:20,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:09:20,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:09:20,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:09:20,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:09:20,023 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:09:20,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:09:20,023 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:09:20,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:09:20,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:09:20,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:09:20,024 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:09:20,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:09:20,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:09:20,025 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:09:20,025 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:09:20,026 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:09:20,026 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:09:20,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:09:20,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:09:20,027 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 [2019-10-15 00:09:20,291 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:09:20,304 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:09:20,307 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:09:20,309 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:09:20,309 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:09:20,310 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label53.c [2019-10-15 00:09:20,371 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7eebf0d9/ca890e793b024ca4babd375670d3ca87/FLAG41c6ca6fd [2019-10-15 00:09:21,090 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:09:21,091 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label53.c [2019-10-15 00:09:21,115 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7eebf0d9/ca890e793b024ca4babd375670d3ca87/FLAG41c6ca6fd [2019-10-15 00:09:21,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7eebf0d9/ca890e793b024ca4babd375670d3ca87 [2019-10-15 00:09:21,244 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:09:21,246 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:09:21,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:21,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:09:21,252 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:09:21,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:21" (1/1) ... [2019-10-15 00:09:21,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6836b2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:21, skipping insertion in model container [2019-10-15 00:09:21,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:09:21" (1/1) ... [2019-10-15 00:09:21,267 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:09:21,356 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:09:22,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:22,280 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:09:22,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:09:22,654 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:09:22,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:22 WrapperNode [2019-10-15 00:09:22,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:09:22,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:09:22,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:09:22,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:09:22,671 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:22" (1/1) ... [2019-10-15 00:09:22,672 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:22" (1/1) ... [2019-10-15 00:09:22,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:22" (1/1) ... [2019-10-15 00:09:22,727 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:22" (1/1) ... [2019-10-15 00:09:22,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:22" (1/1) ... [2019-10-15 00:09:22,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:22" (1/1) ... [2019-10-15 00:09:22,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:22" (1/1) ... [2019-10-15 00:09:22,850 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:09:22,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:09:22,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:09:22,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:09:22,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:22" (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 [2019-10-15 00:09:22,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:09:22,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:09:22,929 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:09:22,929 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:09:22,929 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:09:22,930 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:09:22,930 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:09:22,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:09:22,930 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:09:22,930 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:09:22,931 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:09:22,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:09:22,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:09:25,273 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:09:25,274 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:09:25,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:25 BoogieIcfgContainer [2019-10-15 00:09:25,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:09:25,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:09:25,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:09:25,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:09:25,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:09:21" (1/3) ... [2019-10-15 00:09:25,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d23e891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:25, skipping insertion in model container [2019-10-15 00:09:25,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:09:22" (2/3) ... [2019-10-15 00:09:25,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d23e891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:09:25, skipping insertion in model container [2019-10-15 00:09:25,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:09:25" (3/3) ... [2019-10-15 00:09:25,300 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label53.c [2019-10-15 00:09:25,314 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:09:25,326 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:09:25,340 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:09:25,381 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:09:25,382 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:09:25,382 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:09:25,382 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:09:25,382 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:09:25,382 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:09:25,382 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:09:25,383 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:09:25,420 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:09:25,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 00:09:25,429 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:25,430 INFO L380 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] [2019-10-15 00:09:25,432 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:25,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:25,438 INFO L82 PathProgramCache]: Analyzing trace with hash -302324190, now seen corresponding path program 1 times [2019-10-15 00:09:25,448 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:25,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097981614] [2019-10-15 00:09:25,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:25,449 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:25,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:25,731 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097981614] [2019-10-15 00:09:25,732 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:25,732 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:09:25,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888124808] [2019-10-15 00:09:25,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:09:25,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:25,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:09:25,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:25,757 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:09:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:28,187 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:09:28,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:09:28,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-10-15 00:09:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:28,213 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:09:28,213 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:09:28,228 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:09:28,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:09:28,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:09:28,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:09:28,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-10-15 00:09:28,356 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 43 [2019-10-15 00:09:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:28,358 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-10-15 00:09:28,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:09:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-10-15 00:09:28,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-15 00:09:28,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:28,368 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:28,369 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash 204114703, now seen corresponding path program 1 times [2019-10-15 00:09:28,371 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:28,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414943702] [2019-10-15 00:09:28,371 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:28,372 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:28,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:28,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414943702] [2019-10-15 00:09:28,677 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:28,677 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:09:28,677 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292219694] [2019-10-15 00:09:28,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:09:28,680 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:28,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:09:28,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:09:28,681 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-10-15 00:09:31,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:31,666 INFO L93 Difference]: Finished difference Result 2066 states and 3624 transitions. [2019-10-15 00:09:31,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:31,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2019-10-15 00:09:31,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:31,683 INFO L225 Difference]: With dead ends: 2066 [2019-10-15 00:09:31,683 INFO L226 Difference]: Without dead ends: 1390 [2019-10-15 00:09:31,686 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:09:31,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2019-10-15 00:09:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1372. [2019-10-15 00:09:31,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-10-15 00:09:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2268 transitions. [2019-10-15 00:09:31,785 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2268 transitions. Word has length 112 [2019-10-15 00:09:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:31,785 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2268 transitions. [2019-10-15 00:09:31,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:09:31,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2268 transitions. [2019-10-15 00:09:31,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 00:09:31,796 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:31,797 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:31,799 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:31,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:31,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1530346758, now seen corresponding path program 1 times [2019-10-15 00:09:31,800 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:31,800 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016421000] [2019-10-15 00:09:31,801 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:31,802 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:31,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:31,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:32,009 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016421000] [2019-10-15 00:09:32,009 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:32,009 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:32,009 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8919903] [2019-10-15 00:09:32,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:32,010 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:32,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:32,011 INFO L87 Difference]: Start difference. First operand 1372 states and 2268 transitions. Second operand 6 states. [2019-10-15 00:09:34,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:34,971 INFO L93 Difference]: Finished difference Result 3472 states and 5791 transitions. [2019-10-15 00:09:34,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:34,975 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-15 00:09:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:34,994 INFO L225 Difference]: With dead ends: 3472 [2019-10-15 00:09:35,003 INFO L226 Difference]: Without dead ends: 2106 [2019-10-15 00:09:35,011 INFO L600 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 [2019-10-15 00:09:35,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-15 00:09:35,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2081. [2019-10-15 00:09:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-10-15 00:09:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3263 transitions. [2019-10-15 00:09:35,105 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3263 transitions. Word has length 141 [2019-10-15 00:09:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:35,107 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3263 transitions. [2019-10-15 00:09:35,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3263 transitions. [2019-10-15 00:09:35,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-15 00:09:35,112 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:35,112 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:35,113 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:35,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:35,113 INFO L82 PathProgramCache]: Analyzing trace with hash 225402430, now seen corresponding path program 1 times [2019-10-15 00:09:35,114 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:35,114 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78791334] [2019-10-15 00:09:35,114 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:35,114 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:35,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:35,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:09:35,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78791334] [2019-10-15 00:09:35,435 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:09:35,436 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:09:35,436 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168063196] [2019-10-15 00:09:35,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:09:35,437 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:35,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:09:35,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:09:35,438 INFO L87 Difference]: Start difference. First operand 2081 states and 3263 transitions. Second operand 6 states. [2019-10-15 00:09:38,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:38,078 INFO L93 Difference]: Finished difference Result 5241 states and 8253 transitions. [2019-10-15 00:09:38,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:09:38,084 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 159 [2019-10-15 00:09:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:38,106 INFO L225 Difference]: With dead ends: 5241 [2019-10-15 00:09:38,106 INFO L226 Difference]: Without dead ends: 3166 [2019-10-15 00:09:38,113 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:09:38,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2019-10-15 00:09:38,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3140. [2019-10-15 00:09:38,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2019-10-15 00:09:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4128 transitions. [2019-10-15 00:09:38,209 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4128 transitions. Word has length 159 [2019-10-15 00:09:38,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:38,210 INFO L462 AbstractCegarLoop]: Abstraction has 3140 states and 4128 transitions. [2019-10-15 00:09:38,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:09:38,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4128 transitions. [2019-10-15 00:09:38,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-10-15 00:09:38,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:38,214 INFO L380 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:09:38,215 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:38,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:38,215 INFO L82 PathProgramCache]: Analyzing trace with hash -786182774, now seen corresponding path program 1 times [2019-10-15 00:09:38,215 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:38,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492143571] [2019-10-15 00:09:38,216 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:38,216 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:38,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 102 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:09:38,407 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492143571] [2019-10-15 00:09:38,408 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923234412] [2019-10-15 00:09:38,408 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 [2019-10-15 00:09:38,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:38,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:38,582 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 00:09:38,789 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 00:09:38,875 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:09:38,875 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-10-15 00:09:38,876 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978552622] [2019-10-15 00:09:38,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:09:38,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:09:38,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:09:38,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:09:38,878 INFO L87 Difference]: Start difference. First operand 3140 states and 4128 transitions. Second operand 4 states. [2019-10-15 00:09:41,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:09:41,711 INFO L93 Difference]: Finished difference Result 7285 states and 9429 transitions. [2019-10-15 00:09:41,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:09:41,712 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 241 [2019-10-15 00:09:41,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:09:41,737 INFO L225 Difference]: With dead ends: 7285 [2019-10-15 00:09:41,737 INFO L226 Difference]: Without dead ends: 4151 [2019-10-15 00:09:41,749 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:09:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2019-10-15 00:09:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3814. [2019-10-15 00:09:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3814 states. [2019-10-15 00:09:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3814 states to 3814 states and 4789 transitions. [2019-10-15 00:09:41,880 INFO L78 Accepts]: Start accepts. Automaton has 3814 states and 4789 transitions. Word has length 241 [2019-10-15 00:09:41,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:09:41,881 INFO L462 AbstractCegarLoop]: Abstraction has 3814 states and 4789 transitions. [2019-10-15 00:09:41,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:09:41,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3814 states and 4789 transitions. [2019-10-15 00:09:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2019-10-15 00:09:41,891 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:09:41,892 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:09:42,106 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:09:42,107 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:09:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:42,108 INFO L82 PathProgramCache]: Analyzing trace with hash -555703454, now seen corresponding path program 1 times [2019-10-15 00:09:42,108 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:09:42,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43185105] [2019-10-15 00:09:42,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:42,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:09:42,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:09:42,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 225 proven. 115 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-15 00:09:42,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43185105] [2019-10-15 00:09:42,656 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22724237] [2019-10-15 00:09:42,656 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 [2019-10-15 00:09:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:09:42,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:09:42,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:09:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 415 proven. 2 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 00:09:43,081 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:09:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 225 proven. 115 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-15 00:09:43,255 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [875191238] [2019-10-15 00:09:43,262 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 404 [2019-10-15 00:09:43,314 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:09:43,315 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:09:51,535 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:09:51,538 INFO L272 AbstractInterpreter]: Visited 135 different actions 135 times. Never merged. Never widened. Performed 307 root evaluator evaluations with a maximum evaluation depth of 14. Performed 307 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-15 00:09:51,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:09:51,542 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates