/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/Problem12_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:48:53,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:48:53,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:48:53,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:48:53,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:48:53,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:48:53,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:48:53,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:48:53,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:48:53,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:48:53,640 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:48:53,641 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:48:53,641 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:48:53,642 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:48:53,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:48:53,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:48:53,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:48:53,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:48:53,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:48:53,652 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:48:53,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:48:53,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:48:53,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:48:53,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:48:53,664 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:48:53,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:48:53,677 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:48:53,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:48:53,683 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 22:48:53,703 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:48:53,704 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:48:53,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:48:53,706 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:48:53,706 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:48:53,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:48:53,706 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:48:53,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:48:53,707 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:48:53,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:48:53,708 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:48:53,708 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:48:53,709 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:48:53,709 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:48:53,709 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:48:53,709 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:48:53,710 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:48:53,710 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:48:53,710 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:48:53,710 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:48:53,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:48:53,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:48:53,711 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:48:53,711 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:48:53,711 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:48:53,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:48:53,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:48:53,712 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:48:53,712 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 22:48:53,971 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:48:53,986 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:48:53,989 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:48:53,991 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:48:53,991 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:48:53,992 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label23.c [2019-11-06 22:48:54,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7706b4312/1f0773626abc4fdda1ed55768f3a2b01/FLAG48e701ec4 [2019-11-06 22:48:54,767 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:48:54,767 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label23.c [2019-11-06 22:48:54,793 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7706b4312/1f0773626abc4fdda1ed55768f3a2b01/FLAG48e701ec4 [2019-11-06 22:48:54,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7706b4312/1f0773626abc4fdda1ed55768f3a2b01 [2019-11-06 22:48:54,876 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:48:54,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:48:54,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:48:54,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:48:54,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:48:54,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:54" (1/1) ... [2019-11-06 22:48:54,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78e1d6a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:54, skipping insertion in model container [2019-11-06 22:48:54,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:48:54" (1/1) ... [2019-11-06 22:48:54,896 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:48:55,046 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:48:56,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:48:56,552 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:48:57,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:48:57,281 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:48:57,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:57 WrapperNode [2019-11-06 22:48:57,282 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:48:57,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:48:57,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:48:57,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:48:57,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:57" (1/1) ... [2019-11-06 22:48:57,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:57" (1/1) ... [2019-11-06 22:48:57,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:57" (1/1) ... [2019-11-06 22:48:57,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:57" (1/1) ... [2019-11-06 22:48:57,463 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:57" (1/1) ... [2019-11-06 22:48:57,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:57" (1/1) ... [2019-11-06 22:48:57,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:57" (1/1) ... [2019-11-06 22:48:57,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:48:57,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:48:57,555 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:48:57,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:48:57,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:57" (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 22:48:57,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:48:57,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:48:57,628 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:48:57,629 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:48:57,629 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:48:57,629 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 22:48:57,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:48:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:48:57,630 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:48:57,630 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:48:57,630 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 22:48:57,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:48:57,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:48:57,631 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:48:57,632 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:48:57,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:48:57,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:49:02,960 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:49:02,960 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:49:02,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:02 BoogieIcfgContainer [2019-11-06 22:49:02,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:49:02,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:49:02,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:49:02,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:49:02,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:48:54" (1/3) ... [2019-11-06 22:49:02,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed7b039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:02, skipping insertion in model container [2019-11-06 22:49:02,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:48:57" (2/3) ... [2019-11-06 22:49:02,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed7b039 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:02, skipping insertion in model container [2019-11-06 22:49:02,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:02" (3/3) ... [2019-11-06 22:49:02,983 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label23.c [2019-11-06 22:49:02,995 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:49:03,009 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:49:03,027 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:49:03,079 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:49:03,079 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:49:03,080 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:49:03,080 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:49:03,080 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:49:03,080 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:49:03,080 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:49:03,081 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:49:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-11-06 22:49:03,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 22:49:03,147 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:03,148 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] [2019-11-06 22:49:03,151 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:03,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:03,157 INFO L82 PathProgramCache]: Analyzing trace with hash -2070539302, now seen corresponding path program 1 times [2019-11-06 22:49:03,170 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:03,171 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66970692] [2019-11-06 22:49:03,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:03,591 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 22:49:03,592 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66970692] [2019-11-06 22:49:03,593 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:03,593 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:49:03,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649152325] [2019-11-06 22:49:03,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:49:03,602 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:03,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:49:03,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:49:03,619 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-11-06 22:49:09,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:09,207 INFO L93 Difference]: Finished difference Result 2443 states and 4697 transitions. [2019-11-06 22:49:09,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:49:09,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2019-11-06 22:49:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:09,242 INFO L225 Difference]: With dead ends: 2443 [2019-11-06 22:49:09,242 INFO L226 Difference]: Without dead ends: 1542 [2019-11-06 22:49:09,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:49:09,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-11-06 22:49:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-11-06 22:49:09,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-11-06 22:49:09,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2852 transitions. [2019-11-06 22:49:09,399 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2852 transitions. Word has length 41 [2019-11-06 22:49:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:09,400 INFO L462 AbstractCegarLoop]: Abstraction has 1542 states and 2852 transitions. [2019-11-06 22:49:09,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:49:09,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2852 transitions. [2019-11-06 22:49:09,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 22:49:09,406 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:09,406 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:49:09,406 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:09,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:09,407 INFO L82 PathProgramCache]: Analyzing trace with hash 119524935, now seen corresponding path program 1 times [2019-11-06 22:49:09,407 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:09,407 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998475682] [2019-11-06 22:49:09,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:09,668 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998475682] [2019-11-06 22:49:09,668 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:09,669 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:49:09,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081342861] [2019-11-06 22:49:09,671 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:49:09,671 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:09,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:49:09,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:49:09,672 INFO L87 Difference]: Start difference. First operand 1542 states and 2852 transitions. Second operand 5 states. [2019-11-06 22:49:16,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:16,487 INFO L93 Difference]: Finished difference Result 4685 states and 8680 transitions. [2019-11-06 22:49:16,492 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:49:16,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 110 [2019-11-06 22:49:16,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:16,510 INFO L225 Difference]: With dead ends: 4685 [2019-11-06 22:49:16,510 INFO L226 Difference]: Without dead ends: 3149 [2019-11-06 22:49:16,515 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:49:16,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2019-11-06 22:49:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3117. [2019-11-06 22:49:16,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3117 states. [2019-11-06 22:49:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 5119 transitions. [2019-11-06 22:49:16,616 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 5119 transitions. Word has length 110 [2019-11-06 22:49:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:16,617 INFO L462 AbstractCegarLoop]: Abstraction has 3117 states and 5119 transitions. [2019-11-06 22:49:16,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:49:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 5119 transitions. [2019-11-06 22:49:16,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-06 22:49:16,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:16,620 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:49:16,620 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:16,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:16,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1567221619, now seen corresponding path program 1 times [2019-11-06 22:49:16,621 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:16,621 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554490579] [2019-11-06 22:49:16,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:16,766 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554490579] [2019-11-06 22:49:16,767 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067406915] [2019-11-06 22:49:16,767 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 22:49:16,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:16,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:49:16,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:49:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:16,941 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:49:16,993 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:16,993 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:49:16,994 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-11-06 22:49:16,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542231510] [2019-11-06 22:49:16,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:49:16,995 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:16,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:49:16,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:49:16,996 INFO L87 Difference]: Start difference. First operand 3117 states and 5119 transitions. Second operand 4 states. [2019-11-06 22:49:25,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:25,226 INFO L93 Difference]: Finished difference Result 12431 states and 20959 transitions. [2019-11-06 22:49:25,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:49:25,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 116 [2019-11-06 22:49:25,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:25,272 INFO L225 Difference]: With dead ends: 12431 [2019-11-06 22:49:25,272 INFO L226 Difference]: Without dead ends: 9320 [2019-11-06 22:49:25,281 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:49:25,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9320 states. [2019-11-06 22:49:25,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9320 to 9320. [2019-11-06 22:49:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9320 states. [2019-11-06 22:49:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9320 states to 9320 states and 13728 transitions. [2019-11-06 22:49:25,523 INFO L78 Accepts]: Start accepts. Automaton has 9320 states and 13728 transitions. Word has length 116 [2019-11-06 22:49:25,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:25,524 INFO L462 AbstractCegarLoop]: Abstraction has 9320 states and 13728 transitions. [2019-11-06 22:49:25,524 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:49:25,524 INFO L276 IsEmpty]: Start isEmpty. Operand 9320 states and 13728 transitions. [2019-11-06 22:49:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 22:49:25,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:25,527 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:49:25,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:49:25,731 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:25,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:25,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1605374754, now seen corresponding path program 1 times [2019-11-06 22:49:25,732 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:25,733 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548316252] [2019-11-06 22:49:25,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:25,959 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548316252] [2019-11-06 22:49:25,959 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:25,959 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:49:25,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747722454] [2019-11-06 22:49:25,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:49:25,960 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:25,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:49:25,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:49:25,961 INFO L87 Difference]: Start difference. First operand 9320 states and 13728 transitions. Second operand 6 states.