/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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:14:19,863 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:14:19,865 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:14:19,877 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:14:19,878 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:14:19,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:14:19,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:14:19,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:14:19,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:14:19,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:14:19,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:14:19,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:14:19,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:14:19,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:14:19,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:14:19,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:14:19,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:14:19,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:14:19,893 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:14:19,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:14:19,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:14:19,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:14:19,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:14:19,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:14:19,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:14:19,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:14:19,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:14:19,909 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:14:19,910 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 19:14:19,923 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:14:19,923 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:14:19,925 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:14:19,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:14:19,925 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:14:19,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:14:19,925 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:14:19,926 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:14:19,926 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:14:19,926 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:14:19,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:14:19,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:14:19,927 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:14:19,927 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:14:19,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:14:19,927 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:14:19,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:14:19,928 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:14:19,928 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:14:19,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:14:19,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:14:19,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:14:19,929 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:14:19,929 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:14:19,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:14:19,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:14:19,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:14:19,930 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:14:19,930 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:14:20,197 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:14:20,214 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:14:20,218 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:14:20,219 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:14:20,220 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:14:20,221 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label45.c [2019-11-06 19:14:20,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/585a8acb5/3d31bc58f9a04e8cb5f015e33b06b673/FLAGe0c29bcba [2019-11-06 19:14:20,945 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:14:20,945 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label45.c [2019-11-06 19:14:20,959 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/585a8acb5/3d31bc58f9a04e8cb5f015e33b06b673/FLAGe0c29bcba [2019-11-06 19:14:21,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/585a8acb5/3d31bc58f9a04e8cb5f015e33b06b673 [2019-11-06 19:14:21,138 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:14:21,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:14:21,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:21,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:14:21,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:14:21,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:21,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@489413b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21, skipping insertion in model container [2019-11-06 19:14:21,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:21,160 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:14:21,210 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:14:21,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:21,801 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:14:21,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:14:21,989 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:14:21,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21 WrapperNode [2019-11-06 19:14:21,990 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:14:21,991 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:14:21,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:14:21,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:14:22,007 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:22,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:22,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:22,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:22,103 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:22,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:22,143 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (1/1) ... [2019-11-06 19:14:22,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:14:22,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:14:22,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:14:22,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:14:22,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (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 19:14:22,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:14:22,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:14:22,226 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:14:22,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:14:22,226 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:14:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:14:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:14:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:14:22,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:14:22,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:14:22,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:14:23,765 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:14:23,765 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:14:23,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:23 BoogieIcfgContainer [2019-11-06 19:14:23,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:14:23,768 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:14:23,769 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:14:23,772 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:14:23,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:14:21" (1/3) ... [2019-11-06 19:14:23,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32546af6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:23, skipping insertion in model container [2019-11-06 19:14:23,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:14:21" (2/3) ... [2019-11-06 19:14:23,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32546af6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:14:23, skipping insertion in model container [2019-11-06 19:14:23,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:14:23" (3/3) ... [2019-11-06 19:14:23,776 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label45.c [2019-11-06 19:14:23,787 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:14:23,796 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:14:23,810 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:14:23,840 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:14:23,841 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:14:23,841 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:14:23,841 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:14:23,841 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:14:23,842 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:14:23,842 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:14:23,842 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:14:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:14:23,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 19:14:23,878 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:23,879 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] [2019-11-06 19:14:23,881 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:23,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:23,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1020079963, now seen corresponding path program 1 times [2019-11-06 19:14:23,898 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:23,898 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820343411] [2019-11-06 19:14:23,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:24,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:24,341 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 19:14:24,342 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820343411] [2019-11-06 19:14:24,343 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:14:24,343 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:14:24,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576152241] [2019-11-06 19:14:24,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:24,353 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:24,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:24,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:14:24,376 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:14:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:27,293 INFO L93 Difference]: Finished difference Result 902 states and 1625 transitions. [2019-11-06 19:14:27,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:14:27,295 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-11-06 19:14:27,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:27,324 INFO L225 Difference]: With dead ends: 902 [2019-11-06 19:14:27,324 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:14:27,339 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:27,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:14:27,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 376. [2019-11-06 19:14:27,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-11-06 19:14:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2019-11-06 19:14:27,476 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 42 [2019-11-06 19:14:27,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:27,477 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2019-11-06 19:14:27,477 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:27,477 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2019-11-06 19:14:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-06 19:14:27,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:27,491 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:14:27,492 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:27,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:27,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2050989129, now seen corresponding path program 1 times [2019-11-06 19:14:27,494 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:27,494 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611668825] [2019-11-06 19:14:27,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:27,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611668825] [2019-11-06 19:14:27,730 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30326334] [2019-11-06 19:14:27,730 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 19:14:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:27,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:27,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:27,912 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:27,913 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:27,913 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:27,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965530387] [2019-11-06 19:14:27,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:27,915 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:27,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:27,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:27,916 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand 3 states. [2019-11-06 19:14:28,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:28,796 INFO L93 Difference]: Finished difference Result 1114 states and 1581 transitions. [2019-11-06 19:14:28,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:28,796 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-11-06 19:14:28,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:28,802 INFO L225 Difference]: With dead ends: 1114 [2019-11-06 19:14:28,802 INFO L226 Difference]: Without dead ends: 744 [2019-11-06 19:14:28,804 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:28,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2019-11-06 19:14:28,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2019-11-06 19:14:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-11-06 19:14:28,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 976 transitions. [2019-11-06 19:14:28,844 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 976 transitions. Word has length 125 [2019-11-06 19:14:28,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:28,848 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 976 transitions. [2019-11-06 19:14:28,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:28,848 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 976 transitions. [2019-11-06 19:14:28,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-11-06 19:14:28,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:28,856 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:14:29,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:29,060 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:29,061 INFO L82 PathProgramCache]: Analyzing trace with hash 488627185, now seen corresponding path program 1 times [2019-11-06 19:14:29,061 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:29,062 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859739924] [2019-11-06 19:14:29,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:29,275 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859739924] [2019-11-06 19:14:29,275 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254508819] [2019-11-06 19:14:29,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:29,357 INFO L256 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:29,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:29,404 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:29,404 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:29,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473138139] [2019-11-06 19:14:29,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:29,406 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:29,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:29,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:29,406 INFO L87 Difference]: Start difference. First operand 744 states and 976 transitions. Second operand 3 states. [2019-11-06 19:14:30,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:30,281 INFO L93 Difference]: Finished difference Result 1850 states and 2489 transitions. [2019-11-06 19:14:30,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:30,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 137 [2019-11-06 19:14:30,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:30,289 INFO L225 Difference]: With dead ends: 1850 [2019-11-06 19:14:30,289 INFO L226 Difference]: Without dead ends: 1112 [2019-11-06 19:14:30,292 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-11-06 19:14:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-11-06 19:14:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-11-06 19:14:30,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1426 transitions. [2019-11-06 19:14:30,325 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1426 transitions. Word has length 137 [2019-11-06 19:14:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:30,326 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1426 transitions. [2019-11-06 19:14:30,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1426 transitions. [2019-11-06 19:14:30,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-11-06 19:14:30,329 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:30,329 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:14:30,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:30,534 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:30,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:30,535 INFO L82 PathProgramCache]: Analyzing trace with hash 514032181, now seen corresponding path program 1 times [2019-11-06 19:14:30,535 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:30,535 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57011458] [2019-11-06 19:14:30,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 19:14:30,788 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57011458] [2019-11-06 19:14:30,789 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360700554] [2019-11-06 19:14:30,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:30,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:30,867 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:30,880 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:30,946 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:30,946 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:14:30,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146238241] [2019-11-06 19:14:30,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:30,947 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:30,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:30,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:14:30,948 INFO L87 Difference]: Start difference. First operand 1112 states and 1426 transitions. Second operand 3 states. [2019-11-06 19:14:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:31,784 INFO L93 Difference]: Finished difference Result 1848 states and 2448 transitions. [2019-11-06 19:14:31,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:31,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 151 [2019-11-06 19:14:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:31,800 INFO L225 Difference]: With dead ends: 1848 [2019-11-06 19:14:31,800 INFO L226 Difference]: Without dead ends: 1846 [2019-11-06 19:14:31,801 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 152 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:14:31,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2019-11-06 19:14:31,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1298. [2019-11-06 19:14:31,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1298 states. [2019-11-06 19:14:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1738 transitions. [2019-11-06 19:14:31,851 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1738 transitions. Word has length 151 [2019-11-06 19:14:31,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:31,852 INFO L462 AbstractCegarLoop]: Abstraction has 1298 states and 1738 transitions. [2019-11-06 19:14:31,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:31,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1738 transitions. [2019-11-06 19:14:31,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-06 19:14:31,857 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:31,857 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:14:32,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:32,062 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:32,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:32,063 INFO L82 PathProgramCache]: Analyzing trace with hash -16458088, now seen corresponding path program 1 times [2019-11-06 19:14:32,063 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:32,063 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037116900] [2019-11-06 19:14:32,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:32,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:14:32,352 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037116900] [2019-11-06 19:14:32,352 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051965420] [2019-11-06 19:14:32,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:32,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:32,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:32,552 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:32,553 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:32,553 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:14:32,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328595147] [2019-11-06 19:14:32,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:14:32,555 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:14:32,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:14:32,556 INFO L87 Difference]: Start difference. First operand 1298 states and 1738 transitions. Second operand 11 states. [2019-11-06 19:14:37,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:37,254 INFO L93 Difference]: Finished difference Result 5136 states and 7486 transitions. [2019-11-06 19:14:37,255 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 19:14:37,255 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 205 [2019-11-06 19:14:37,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:37,278 INFO L225 Difference]: With dead ends: 5136 [2019-11-06 19:14:37,278 INFO L226 Difference]: Without dead ends: 3090 [2019-11-06 19:14:37,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:14:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3090 states. [2019-11-06 19:14:37,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3090 to 2278. [2019-11-06 19:14:37,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2278 states. [2019-11-06 19:14:37,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3031 transitions. [2019-11-06 19:14:37,398 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3031 transitions. Word has length 205 [2019-11-06 19:14:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:37,399 INFO L462 AbstractCegarLoop]: Abstraction has 2278 states and 3031 transitions. [2019-11-06 19:14:37,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:14:37,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3031 transitions. [2019-11-06 19:14:37,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-11-06 19:14:37,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:37,412 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:14:37,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:37,617 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:37,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:37,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1957605909, now seen corresponding path program 1 times [2019-11-06 19:14:37,618 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:37,618 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214632617] [2019-11-06 19:14:37,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:37,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:38,077 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:14:38,078 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214632617] [2019-11-06 19:14:38,078 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376106959] [2019-11-06 19:14:38,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:38,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:38,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:38,259 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:38,260 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:38,260 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:14:38,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004939429] [2019-11-06 19:14:38,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:14:38,262 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:38,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:14:38,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:14:38,264 INFO L87 Difference]: Start difference. First operand 2278 states and 3031 transitions. Second operand 11 states. [2019-11-06 19:14:41,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:41,893 INFO L93 Difference]: Finished difference Result 4784 states and 6518 transitions. [2019-11-06 19:14:41,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 19:14:41,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 256 [2019-11-06 19:14:41,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:41,905 INFO L225 Difference]: With dead ends: 4784 [2019-11-06 19:14:41,905 INFO L226 Difference]: Without dead ends: 2124 [2019-11-06 19:14:41,916 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 266 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:14:41,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2019-11-06 19:14:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 2082. [2019-11-06 19:14:41,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2082 states. [2019-11-06 19:14:41,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 2605 transitions. [2019-11-06 19:14:41,989 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 2605 transitions. Word has length 256 [2019-11-06 19:14:41,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:41,989 INFO L462 AbstractCegarLoop]: Abstraction has 2082 states and 2605 transitions. [2019-11-06 19:14:41,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:14:41,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 2605 transitions. [2019-11-06 19:14:41,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-11-06 19:14:41,996 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:41,996 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:42,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:42,200 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:42,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1463904413, now seen corresponding path program 1 times [2019-11-06 19:14:42,201 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:42,201 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745557041] [2019-11-06 19:14:42,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:42,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:14:42,504 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745557041] [2019-11-06 19:14:42,504 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081981671] [2019-11-06 19:14:42,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:42,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:42,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 173 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:42,693 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:42,693 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:14:42,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384524197] [2019-11-06 19:14:42,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:14:42,695 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:42,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:14:42,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:14:42,696 INFO L87 Difference]: Start difference. First operand 2082 states and 2605 transitions. Second operand 11 states. [2019-11-06 19:14:46,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:46,424 INFO L93 Difference]: Finished difference Result 5874 states and 8061 transitions. [2019-11-06 19:14:46,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 19:14:46,425 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 256 [2019-11-06 19:14:46,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:46,446 INFO L225 Difference]: With dead ends: 5874 [2019-11-06 19:14:46,447 INFO L226 Difference]: Without dead ends: 3412 [2019-11-06 19:14:46,459 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2019-11-06 19:14:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2019-11-06 19:14:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 2976. [2019-11-06 19:14:46,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2976 states. [2019-11-06 19:14:46,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4140 transitions. [2019-11-06 19:14:46,593 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4140 transitions. Word has length 256 [2019-11-06 19:14:46,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:46,593 INFO L462 AbstractCegarLoop]: Abstraction has 2976 states and 4140 transitions. [2019-11-06 19:14:46,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:14:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4140 transitions. [2019-11-06 19:14:46,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2019-11-06 19:14:46,601 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:46,601 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:46,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:46,806 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:46,806 INFO L82 PathProgramCache]: Analyzing trace with hash 943526086, now seen corresponding path program 1 times [2019-11-06 19:14:46,806 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:46,806 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81022892] [2019-11-06 19:14:46,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:46,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 70 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:14:47,265 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81022892] [2019-11-06 19:14:47,265 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020819776] [2019-11-06 19:14:47,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:47,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:14:47,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 19:14:47,648 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:47,648 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:14:47,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904427738] [2019-11-06 19:14:47,649 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:14:47,649 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:47,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:14:47,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:14:47,650 INFO L87 Difference]: Start difference. First operand 2976 states and 4140 transitions. Second operand 5 states. [2019-11-06 19:14:48,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:48,986 INFO L93 Difference]: Finished difference Result 5492 states and 7614 transitions. [2019-11-06 19:14:48,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:14:48,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 287 [2019-11-06 19:14:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:49,002 INFO L225 Difference]: With dead ends: 5492 [2019-11-06 19:14:49,002 INFO L226 Difference]: Without dead ends: 2732 [2019-11-06 19:14:49,021 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:14:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2019-11-06 19:14:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2690. [2019-11-06 19:14:49,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2690 states. [2019-11-06 19:14:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 3454 transitions. [2019-11-06 19:14:49,092 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 3454 transitions. Word has length 287 [2019-11-06 19:14:49,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:49,093 INFO L462 AbstractCegarLoop]: Abstraction has 2690 states and 3454 transitions. [2019-11-06 19:14:49,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:14:49,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 3454 transitions. [2019-11-06 19:14:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2019-11-06 19:14:49,101 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:49,101 INFO L410 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, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:49,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:49,307 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:49,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:49,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2088265127, now seen corresponding path program 1 times [2019-11-06 19:14:49,308 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:49,308 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774122813] [2019-11-06 19:14:49,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:49,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:49,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 115 proven. 256 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:14:50,818 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774122813] [2019-11-06 19:14:50,818 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729403199] [2019-11-06 19:14:50,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:50,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:50,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2019-11-06 19:14:51,021 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:51,021 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2019-11-06 19:14:51,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479439705] [2019-11-06 19:14:51,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:51,022 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:51,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:51,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:14:51,023 INFO L87 Difference]: Start difference. First operand 2690 states and 3454 transitions. Second operand 3 states. [2019-11-06 19:14:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:51,753 INFO L93 Difference]: Finished difference Result 5564 states and 7110 transitions. [2019-11-06 19:14:51,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:51,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2019-11-06 19:14:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:51,767 INFO L225 Difference]: With dead ends: 5564 [2019-11-06 19:14:51,767 INFO L226 Difference]: Without dead ends: 2872 [2019-11-06 19:14:51,777 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:14:51,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2872 states. [2019-11-06 19:14:51,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2872 to 2684. [2019-11-06 19:14:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2684 states. [2019-11-06 19:14:51,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3406 transitions. [2019-11-06 19:14:51,846 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3406 transitions. Word has length 343 [2019-11-06 19:14:51,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:51,847 INFO L462 AbstractCegarLoop]: Abstraction has 2684 states and 3406 transitions. [2019-11-06 19:14:51,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:51,847 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3406 transitions. [2019-11-06 19:14:51,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2019-11-06 19:14:51,855 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:51,855 INFO L410 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, 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, 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] [2019-11-06 19:14:52,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:52,059 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:52,060 INFO L82 PathProgramCache]: Analyzing trace with hash 366121579, now seen corresponding path program 1 times [2019-11-06 19:14:52,060 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:52,060 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557790144] [2019-11-06 19:14:52,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 115 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 19:14:53,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557790144] [2019-11-06 19:14:53,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994709725] [2019-11-06 19:14:53,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:53,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 19:14:53,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:53,350 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-06 19:14:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 296 proven. 53 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 19:14:53,559 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:53,560 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-11-06 19:14:53,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290429112] [2019-11-06 19:14:53,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:14:53,561 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:53,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:14:53,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:14:53,562 INFO L87 Difference]: Start difference. First operand 2684 states and 3406 transitions. Second operand 16 states. [2019-11-06 19:14:55,648 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35