/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/Problem18_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:57:48,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:57:48,776 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:57:48,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:57:48,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:57:48,792 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:57:48,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:57:48,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:57:48,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:57:48,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:57:48,798 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:57:48,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:57:48,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:57:48,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:57:48,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:57:48,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:57:48,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:57:48,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:57:48,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:57:48,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:57:48,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:57:48,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:57:48,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:57:48,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:57:48,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:57:48,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:57:48,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:57:48,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:57:48,825 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 22:57:48,839 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:57:48,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:57:48,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:57:48,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:57:48,841 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:57:48,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:57:48,842 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:57:48,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:57:48,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:57:48,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:57:48,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:57:48,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:57:48,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:57:48,843 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:57:48,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:57:48,843 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:57:48,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:57:48,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:57:48,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:57:48,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:57:48,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:57:48,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:57:48,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:57:48,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:57:48,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:57:48,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:57:48,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:57:48,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:57:48,846 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 22:57:49,133 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:57:49,153 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:57:49,156 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:57:49,158 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:57:49,158 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:57:49,159 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label37.c [2019-11-06 22:57:49,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5fed113f/5601aa8a69c04a90ac3bdae9496b6ce4/FLAG0063c9f1a [2019-11-06 22:57:49,926 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:57:49,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label37.c [2019-11-06 22:57:49,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5fed113f/5601aa8a69c04a90ac3bdae9496b6ce4/FLAG0063c9f1a [2019-11-06 22:57:50,094 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5fed113f/5601aa8a69c04a90ac3bdae9496b6ce4 [2019-11-06 22:57:50,106 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:57:50,108 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:57:50,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:50,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:57:50,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:57:50,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:50" (1/1) ... [2019-11-06 22:57:50,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@473fe89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:50, skipping insertion in model container [2019-11-06 22:57:50,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:50" (1/1) ... [2019-11-06 22:57:50,125 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:57:50,249 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:57:51,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:51,736 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:57:52,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:52,334 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:57:52,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:52 WrapperNode [2019-11-06 22:57:52,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:52,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:57:52,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:57:52,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:57:52,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:52" (1/1) ... [2019-11-06 22:57:52,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:52" (1/1) ... [2019-11-06 22:57:52,407 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:52" (1/1) ... [2019-11-06 22:57:52,409 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:52" (1/1) ... [2019-11-06 22:57:52,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:52" (1/1) ... [2019-11-06 22:57:52,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:52" (1/1) ... [2019-11-06 22:57:52,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:52" (1/1) ... [2019-11-06 22:57:52,584 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:57:52,585 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:57:52,585 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:57:52,585 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:57:52,586 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:52" (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 22:57:52,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:57:52,658 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:57:52,658 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:57:52,658 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:57:52,659 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:57:52,659 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:57:52,659 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:57:52,659 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:57:52,659 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:57:52,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:57:52,660 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:57:52,660 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:57:52,660 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:57:52,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:57:52,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:57:56,803 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:57:56,804 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:57:56,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:56 BoogieIcfgContainer [2019-11-06 22:57:56,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:57:56,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:57:56,817 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:57:56,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:57:56,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:57:50" (1/3) ... [2019-11-06 22:57:56,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10aa4eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:56, skipping insertion in model container [2019-11-06 22:57:56,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:52" (2/3) ... [2019-11-06 22:57:56,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10aa4eda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:57:56, skipping insertion in model container [2019-11-06 22:57:56,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:57:56" (3/3) ... [2019-11-06 22:57:56,835 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label37.c [2019-11-06 22:57:56,851 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:57:56,868 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:57:56,887 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:57:56,943 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:57:56,944 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:57:56,944 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:57:56,944 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:57:56,944 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:57:56,945 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:57:56,945 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:57:56,945 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:57:57,004 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:57:57,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 22:57:57,019 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:57:57,021 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] [2019-11-06 22:57:57,023 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:57:57,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:57:57,032 INFO L82 PathProgramCache]: Analyzing trace with hash -545503303, now seen corresponding path program 1 times [2019-11-06 22:57:57,046 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:57:57,046 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779394551] [2019-11-06 22:57:57,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:57:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:57:57,527 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 22:57:57,528 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779394551] [2019-11-06 22:57:57,529 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:57:57,529 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:57:57,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167155534] [2019-11-06 22:57:57,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:57:57,539 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:57:57,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:57:57,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:57:57,556 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-11-06 22:58:02,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:02,307 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-11-06 22:58:02,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:58:02,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2019-11-06 22:58:02,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:02,339 INFO L225 Difference]: With dead ends: 2248 [2019-11-06 22:58:02,339 INFO L226 Difference]: Without dead ends: 1412 [2019-11-06 22:58:02,353 INFO L630 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 [2019-11-06 22:58:02,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-11-06 22:58:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-11-06 22:58:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-11-06 22:58:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-11-06 22:58:02,549 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 62 [2019-11-06 22:58:02,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:02,550 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-11-06 22:58:02,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:58:02,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-11-06 22:58:02,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-11-06 22:58:02,557 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:02,557 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 22:58:02,558 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:02,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:02,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1269044687, now seen corresponding path program 1 times [2019-11-06 22:58:02,559 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:02,559 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591387309] [2019-11-06 22:58:02,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:02,750 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591387309] [2019-11-06 22:58:02,750 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:02,750 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:58:02,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297430478] [2019-11-06 22:58:02,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:58:02,752 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:02,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:58:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:58:02,753 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 5 states. [2019-11-06 22:58:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:08,334 INFO L93 Difference]: Finished difference Result 3572 states and 6416 transitions. [2019-11-06 22:58:08,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:08,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2019-11-06 22:58:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:08,353 INFO L225 Difference]: With dead ends: 3572 [2019-11-06 22:58:08,354 INFO L226 Difference]: Without dead ends: 2166 [2019-11-06 22:58:08,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:58:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2019-11-06 22:58:08,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2146. [2019-11-06 22:58:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2146 states. [2019-11-06 22:58:08,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3628 transitions. [2019-11-06 22:58:08,438 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3628 transitions. Word has length 133 [2019-11-06 22:58:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:08,441 INFO L462 AbstractCegarLoop]: Abstraction has 2146 states and 3628 transitions. [2019-11-06 22:58:08,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:58:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3628 transitions. [2019-11-06 22:58:08,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-11-06 22:58:08,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:08,458 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:08,459 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:08,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:08,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1629453244, now seen corresponding path program 1 times [2019-11-06 22:58:08,459 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:08,460 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781383612] [2019-11-06 22:58:08,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:08,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:08,732 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:08,732 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781383612] [2019-11-06 22:58:08,733 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:08,733 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:58:08,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415419257] [2019-11-06 22:58:08,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:58:08,736 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:08,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:58:08,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:58:08,737 INFO L87 Difference]: Start difference. First operand 2146 states and 3628 transitions. Second operand 6 states. [2019-11-06 22:58:13,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:13,896 INFO L93 Difference]: Finished difference Result 5051 states and 8506 transitions. [2019-11-06 22:58:13,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:13,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2019-11-06 22:58:13,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:13,915 INFO L225 Difference]: With dead ends: 5051 [2019-11-06 22:58:13,915 INFO L226 Difference]: Without dead ends: 2911 [2019-11-06 22:58:13,922 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 22:58:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-11-06 22:58:14,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2887. [2019-11-06 22:58:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2019-11-06 22:58:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4487 transitions. [2019-11-06 22:58:14,023 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4487 transitions. Word has length 156 [2019-11-06 22:58:14,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:14,023 INFO L462 AbstractCegarLoop]: Abstraction has 2887 states and 4487 transitions. [2019-11-06 22:58:14,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:58:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4487 transitions. [2019-11-06 22:58:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-06 22:58:14,026 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:14,026 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:14,026 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:14,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:14,027 INFO L82 PathProgramCache]: Analyzing trace with hash 242415228, now seen corresponding path program 1 times [2019-11-06 22:58:14,027 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:14,027 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304245510] [2019-11-06 22:58:14,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:14,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:14,187 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:14,187 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304245510] [2019-11-06 22:58:14,187 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:14,188 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:58:14,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167162278] [2019-11-06 22:58:14,189 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:58:14,189 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:14,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:58:14,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:58:14,190 INFO L87 Difference]: Start difference. First operand 2887 states and 4487 transitions. Second operand 6 states. [2019-11-06 22:58:19,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:19,018 INFO L93 Difference]: Finished difference Result 6543 states and 10148 transitions. [2019-11-06 22:58:19,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:19,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-11-06 22:58:19,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:19,042 INFO L225 Difference]: With dead ends: 6543 [2019-11-06 22:58:19,042 INFO L226 Difference]: Without dead ends: 3662 [2019-11-06 22:58:19,052 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 22:58:19,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2019-11-06 22:58:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3642. [2019-11-06 22:58:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3642 states. [2019-11-06 22:58:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 5124 transitions. [2019-11-06 22:58:19,221 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 5124 transitions. Word has length 160 [2019-11-06 22:58:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:19,222 INFO L462 AbstractCegarLoop]: Abstraction has 3642 states and 5124 transitions. [2019-11-06 22:58:19,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:58:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 5124 transitions. [2019-11-06 22:58:19,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-06 22:58:19,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:19,228 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:58:19,228 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:19,228 INFO L82 PathProgramCache]: Analyzing trace with hash -4380259, now seen corresponding path program 1 times [2019-11-06 22:58:19,229 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:19,229 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161095937] [2019-11-06 22:58:19,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:19,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:19,473 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161095937] [2019-11-06 22:58:19,473 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:19,473 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:58:19,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516933263] [2019-11-06 22:58:19,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:58:19,474 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:19,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:58:19,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:58:19,475 INFO L87 Difference]: Start difference. First operand 3642 states and 5124 transitions. Second operand 6 states. [2019-11-06 22:58:24,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:24,409 INFO L93 Difference]: Finished difference Result 10404 states and 14982 transitions. [2019-11-06 22:58:24,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:24,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 191 [2019-11-06 22:58:24,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:24,446 INFO L225 Difference]: With dead ends: 10404 [2019-11-06 22:58:24,446 INFO L226 Difference]: Without dead ends: 6768 [2019-11-06 22:58:24,455 INFO L630 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 [2019-11-06 22:58:24,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2019-11-06 22:58:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6670. [2019-11-06 22:58:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2019-11-06 22:58:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 9031 transitions. [2019-11-06 22:58:24,628 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 9031 transitions. Word has length 191 [2019-11-06 22:58:24,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:24,628 INFO L462 AbstractCegarLoop]: Abstraction has 6670 states and 9031 transitions. [2019-11-06 22:58:24,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:58:24,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 9031 transitions. [2019-11-06 22:58:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-11-06 22:58:24,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:24,634 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:58:24,635 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:24,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:24,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1134912638, now seen corresponding path program 1 times [2019-11-06 22:58:24,635 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:24,635 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401996881] [2019-11-06 22:58:24,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:24,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 110 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:58:24,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401996881] [2019-11-06 22:58:24,838 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244304542] [2019-11-06 22:58:24,839 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 22:58:24,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:24,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:58:24,967 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:58:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-06 22:58:25,230 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:58:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 110 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:58:25,363 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:58:25,363 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-11-06 22:58:25,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933196311] [2019-11-06 22:58:25,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:58:25,364 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:25,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:58:25,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:58:25,365 INFO L87 Difference]: Start difference. First operand 6670 states and 9031 transitions. Second operand 5 states.