/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/hhk2008.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:02:54,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:02:54,842 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:02:54,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:02:54,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:02:54,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:02:54,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:02:54,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:02:54,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:02:54,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:02:54,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:02:54,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:02:54,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:02:54,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:02:54,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:02:54,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:02:54,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:02:54,890 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:02:54,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:02:54,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:02:54,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:02:54,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:02:54,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:02:54,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:02:54,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 12:02:54,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 12:02:54,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 12:02:54,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 12:02:54,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 12:02:54,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 12:02:54,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 12:02:54,917 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 12:02:54,918 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 12:02:54,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 12:02:54,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 12:02:54,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 12:02:54,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 12:02:54,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 12:02:54,921 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:02:54,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:02:54,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:02:54,924 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 [2020-07-20 12:02:54,961 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:02:54,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:02:54,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:02:54,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:02:54,966 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:02:54,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:02:54,966 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:02:54,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:02:54,967 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:02:54,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:02:54,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:02:54,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:02:54,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:02:54,968 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:02:54,968 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:02:54,969 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:02:54,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:02:54,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:02:54,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:02:54,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:02:54,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:02:54,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:02:54,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:02:54,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:02:54,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:02:54,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:02:54,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:54,972 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:02:54,972 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:02:54,972 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 12:02:55,332 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:02:55,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:02:55,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:02:55,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:02:55,356 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:02:55,357 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/hhk2008.i [2020-07-20 12:02:55,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18a1daf58/edabab4a6ade4309b33e8e03ba2c8e6d/FLAGe335541d9 [2020-07-20 12:02:55,977 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:02:55,978 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/hhk2008.i [2020-07-20 12:02:55,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18a1daf58/edabab4a6ade4309b33e8e03ba2c8e6d/FLAGe335541d9 [2020-07-20 12:02:56,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18a1daf58/edabab4a6ade4309b33e8e03ba2c8e6d [2020-07-20 12:02:56,355 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:02:56,358 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:02:56,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:02:56,360 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:02:56,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:02:56,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:02:56" (1/1) ... [2020-07-20 12:02:56,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@703f0828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:56, skipping insertion in model container [2020-07-20 12:02:56,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:02:56" (1/1) ... [2020-07-20 12:02:56,381 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:02:56,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:02:56,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:02:56,621 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:02:56,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:02:56,654 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:02:56,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:56 WrapperNode [2020-07-20 12:02:56,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:02:56,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:02:56,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:02:56,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:02:56,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:56" (1/1) ... [2020-07-20 12:02:56,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:56" (1/1) ... [2020-07-20 12:02:56,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:56" (1/1) ... [2020-07-20 12:02:56,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:56" (1/1) ... [2020-07-20 12:02:56,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:56" (1/1) ... [2020-07-20 12:02:56,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:56" (1/1) ... [2020-07-20 12:02:56,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:56" (1/1) ... [2020-07-20 12:02:56,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:02:56,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:02:56,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:02:56,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:02:56,779 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:56" (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 [2020-07-20 12:02:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:02:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:02:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:02:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 12:02:56,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:02:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:02:56,857 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:02:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:02:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 12:02:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 12:02:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:02:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:02:56,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:02:57,109 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:02:57,110 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 12:02:57,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:02:57 BoogieIcfgContainer [2020-07-20 12:02:57,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:02:57,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:02:57,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:02:57,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:02:57,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:02:56" (1/3) ... [2020-07-20 12:02:57,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c271e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:02:57, skipping insertion in model container [2020-07-20 12:02:57,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:02:56" (2/3) ... [2020-07-20 12:02:57,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c271e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:02:57, skipping insertion in model container [2020-07-20 12:02:57,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:02:57" (3/3) ... [2020-07-20 12:02:57,127 INFO L109 eAbstractionObserver]: Analyzing ICFG hhk2008.i [2020-07-20 12:02:57,141 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:02:57,153 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:02:57,167 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:02:57,188 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:02:57,188 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:02:57,188 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:02:57,188 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:02:57,188 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:02:57,188 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:02:57,189 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:02:57,189 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:02:57,204 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 12:02:57,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 12:02:57,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:57,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:57,211 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:57,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:57,218 INFO L82 PathProgramCache]: Analyzing trace with hash -677001103, now seen corresponding path program 1 times [2020-07-20 12:02:57,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:57,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720168525] [2020-07-20 12:02:57,226 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:57,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 12:02:57,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:57,404 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:02:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:57,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:02:57,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720168525] [2020-07-20 12:02:57,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:02:57,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 12:02:57,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904464886] [2020-07-20 12:02:57,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 12:02:57,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:57,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 12:02:57,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 12:02:57,482 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2020-07-20 12:02:57,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:57,608 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-07-20 12:02:57,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 12:02:57,610 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-07-20 12:02:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:57,622 INFO L225 Difference]: With dead ends: 41 [2020-07-20 12:02:57,622 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 12:02:57,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:02:57,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 12:02:57,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 12:02:57,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 12:02:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-20 12:02:57,675 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-20 12:02:57,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:57,676 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-20 12:02:57,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 12:02:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-20 12:02:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 12:02:57,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:57,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:57,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:57,893 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:57,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:57,894 INFO L82 PathProgramCache]: Analyzing trace with hash 523340046, now seen corresponding path program 1 times [2020-07-20 12:02:57,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:57,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596514643] [2020-07-20 12:02:57,895 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:57,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:57,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 12:02:57,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:58,038 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:02:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:58,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:02:58,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:02:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:58,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596514643] [2020-07-20 12:02:58,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:02:58,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 12:02:58,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102421790] [2020-07-20 12:02:58,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 12:02:58,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:58,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 12:02:58,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 12:02:58,214 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 10 states. [2020-07-20 12:02:58,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:58,462 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-07-20 12:02:58,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 12:02:58,463 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-07-20 12:02:58,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:58,464 INFO L225 Difference]: With dead ends: 22 [2020-07-20 12:02:58,465 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 12:02:58,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-07-20 12:02:58,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 12:02:58,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-07-20 12:02:58,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-07-20 12:02:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-07-20 12:02:58,474 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2020-07-20 12:02:58,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:58,475 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-07-20 12:02:58,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 12:02:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-07-20 12:02:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 12:02:58,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:58,476 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:58,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:58,690 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:58,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:58,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1555818862, now seen corresponding path program 2 times [2020-07-20 12:02:58,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:58,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006634253] [2020-07-20 12:02:58,692 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:02:58,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 12:02:58,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:02:58,840 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:02:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:58,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:02:58,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:02:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:02:59,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006634253] [2020-07-20 12:02:59,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:02:59,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-07-20 12:02:59,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046588413] [2020-07-20 12:02:59,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 12:02:59,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:02:59,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 12:02:59,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 12:02:59,055 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 14 states. [2020-07-20 12:02:59,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:02:59,586 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-07-20 12:02:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 12:02:59,587 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2020-07-20 12:02:59,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:02:59,588 INFO L225 Difference]: With dead ends: 26 [2020-07-20 12:02:59,588 INFO L226 Difference]: Without dead ends: 20 [2020-07-20 12:02:59,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2020-07-20 12:02:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-20 12:02:59,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-20 12:02:59,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-20 12:02:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-07-20 12:02:59,596 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 15 [2020-07-20 12:02:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:02:59,597 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-07-20 12:02:59,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 12:02:59,597 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-07-20 12:02:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 12:02:59,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:02:59,598 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:02:59,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:59,812 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:02:59,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:02:59,814 INFO L82 PathProgramCache]: Analyzing trace with hash 399696430, now seen corresponding path program 3 times [2020-07-20 12:02:59,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:02:59,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20598048] [2020-07-20 12:02:59,815 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) [2020-07-20 12:02:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:02:59,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 12:02:59,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:03:00,026 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:03:00,080 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:03:00,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:03:00,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:03:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:03:00,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20598048] [2020-07-20 12:03:00,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:03:00,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2020-07-20 12:03:00,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136011013] [2020-07-20 12:03:00,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 12:03:00,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:03:00,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 12:03:00,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-07-20 12:03:00,487 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 22 states. [2020-07-20 12:03:01,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:03:01,790 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-07-20 12:03:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 12:03:01,791 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 19 [2020-07-20 12:03:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:03:01,793 INFO L225 Difference]: With dead ends: 34 [2020-07-20 12:03:01,793 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 12:03:01,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 12:03:01,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 12:03:01,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 12:03:01,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 12:03:01,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-07-20 12:03:01,807 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 19 [2020-07-20 12:03:01,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:03:01,809 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-07-20 12:03:01,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 12:03:01,811 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-07-20 12:03:01,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 12:03:01,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:03:01,813 INFO L422 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:03:02,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:02,029 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:03:02,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:03:02,030 INFO L82 PathProgramCache]: Analyzing trace with hash -852380754, now seen corresponding path program 4 times [2020-07-20 12:03:02,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:03:02,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071449944] [2020-07-20 12:03:02,031 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:03:02,072 WARN L261 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 68 conjunts are in the unsatisfiable core [2020-07-20 12:03:02,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:03:02,453 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:03:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:03:02,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:03:02,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:03:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:03:03,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071449944] [2020-07-20 12:03:03,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:03:03,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 38 [2020-07-20 12:03:03,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39135810] [2020-07-20 12:03:03,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-20 12:03:03,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:03:03,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-20 12:03:03,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1104, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 12:03:03,515 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 38 states. [2020-07-20 12:03:04,585 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-20 12:03:04,865 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-07-20 12:03:05,103 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-20 12:03:05,341 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-07-20 12:03:05,555 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 12:03:05,813 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 12:03:06,032 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 12:03:07,792 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 12:03:07,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:03:07,804 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2020-07-20 12:03:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 12:03:07,807 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 27 [2020-07-20 12:03:07,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:03:07,808 INFO L225 Difference]: With dead ends: 50 [2020-07-20 12:03:07,808 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 12:03:07,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1192, Invalid=3920, Unknown=0, NotChecked=0, Total=5112 [2020-07-20 12:03:07,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 12:03:07,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 12:03:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 12:03:07,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-07-20 12:03:07,827 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 27 [2020-07-20 12:03:07,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:03:07,827 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-07-20 12:03:07,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-20 12:03:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-07-20 12:03:07,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 12:03:07,829 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:03:07,829 INFO L422 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:03:08,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:08,042 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:03:08,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:03:08,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2114791762, now seen corresponding path program 5 times [2020-07-20 12:03:08,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:03:08,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699539019] [2020-07-20 12:03:08,044 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:03:08,108 WARN L261 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 132 conjunts are in the unsatisfiable core [2020-07-20 12:03:08,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:03:09,241 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:03:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:03:09,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:03:09,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:03:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:03:12,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699539019] [2020-07-20 12:03:12,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:03:12,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 70 [2020-07-20 12:03:12,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812799667] [2020-07-20 12:03:12,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-20 12:03:12,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:03:12,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-20 12:03:12,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1102, Invalid=3728, Unknown=0, NotChecked=0, Total=4830 [2020-07-20 12:03:12,967 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 70 states. [2020-07-20 12:03:16,378 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 198 [2020-07-20 12:03:17,069 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 136 [2020-07-20 12:03:17,772 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-20 12:03:18,386 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 132 [2020-07-20 12:03:19,113 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-07-20 12:03:19,887 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-07-20 12:03:20,436 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-20 12:03:21,047 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-07-20 12:03:21,663 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-07-20 12:03:22,178 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-07-20 12:03:22,729 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-07-20 12:03:23,276 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 12:03:23,907 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-20 12:03:24,448 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-20 12:03:24,932 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-20 12:03:25,361 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 12:03:25,854 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 12:03:26,321 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 12:03:26,765 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-20 12:03:27,197 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-20 12:03:27,629 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 12:03:28,026 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 12:03:28,400 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 12:03:32,140 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification that was a NOOP. DAG size: 193 [2020-07-20 12:03:32,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:03:32,151 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2020-07-20 12:03:32,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-07-20 12:03:32,151 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 43 [2020-07-20 12:03:32,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:03:32,154 INFO L225 Difference]: With dead ends: 82 [2020-07-20 12:03:32,154 INFO L226 Difference]: Without dead ends: 76 [2020-07-20 12:03:32,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2296 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=4408, Invalid=13952, Unknown=0, NotChecked=0, Total=18360 [2020-07-20 12:03:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-20 12:03:32,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-07-20 12:03:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 12:03:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-07-20 12:03:32,181 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 43 [2020-07-20 12:03:32,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:03:32,182 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-07-20 12:03:32,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-20 12:03:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-07-20 12:03:32,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-20 12:03:32,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:03:32,184 INFO L422 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:03:32,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:32,399 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:03:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:03:32,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1115480914, now seen corresponding path program 6 times [2020-07-20 12:03:32,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:03:32,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135282433] [2020-07-20 12:03:32,401 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:03:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:03:32,468 WARN L261 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 260 conjunts are in the unsatisfiable core [2020-07-20 12:03:32,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:03:36,850 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:03:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:03:37,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:03:37,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:03:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:03:53,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135282433] [2020-07-20 12:03:53,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:03:53,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 134 [2020-07-20 12:03:53,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639881085] [2020-07-20 12:03:53,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 134 states [2020-07-20 12:03:53,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:03:53,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2020-07-20 12:03:53,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4238, Invalid=13584, Unknown=0, NotChecked=0, Total=17822 [2020-07-20 12:03:53,672 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 134 states. [2020-07-20 12:04:08,412 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 390 [2020-07-20 12:04:10,647 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 391 DAG size of output: 264 [2020-07-20 12:04:14,223 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 12:04:16,045 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 386 DAG size of output: 260 [2020-07-20 12:04:19,421 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 376 [2020-07-20 12:04:23,105 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 370 [2020-07-20 12:04:26,313 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 364 [2020-07-20 12:04:29,794 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 358 [2020-07-20 12:04:33,258 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 352 [2020-07-20 12:04:36,866 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 346 [2020-07-20 12:04:40,409 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 340 [2020-07-20 12:04:43,953 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 334 [2020-07-20 12:04:47,499 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification that was a NOOP. DAG size: 328 [2020-07-20 12:04:51,113 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 322 [2020-07-20 12:04:54,798 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification that was a NOOP. DAG size: 316 [2020-07-20 12:04:58,298 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 310 [2020-07-20 12:05:01,399 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 304 [2020-07-20 12:05:04,876 WARN L193 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-07-20 12:05:08,636 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 292 [2020-07-20 12:05:11,909 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 286 [2020-07-20 12:05:15,390 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 280 [2020-07-20 12:05:18,861 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 274 [2020-07-20 12:05:22,884 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 268 [2020-07-20 12:05:26,793 WARN L193 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 262 [2020-07-20 12:05:30,783 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 256 [2020-07-20 12:05:34,730 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 250 [2020-07-20 12:05:38,658 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 244 [2020-07-20 12:05:42,782 WARN L193 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 238 [2020-07-20 12:05:46,853 WARN L193 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 232 [2020-07-20 12:05:50,857 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 226 [2020-07-20 12:05:55,020 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 220 [2020-07-20 12:05:59,114 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 214 [2020-07-20 12:06:02,320 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification that was a NOOP. DAG size: 208 [2020-07-20 12:06:05,266 WARN L193 SmtUtils]: Spent 827.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-20 12:06:09,482 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 196 [2020-07-20 12:06:12,552 WARN L193 SmtUtils]: Spent 949.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-07-20 12:06:16,353 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 184 [2020-07-20 12:06:19,943 WARN L193 SmtUtils]: Spent 878.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-07-20 12:06:22,772 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-20 12:06:25,180 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-07-20 12:06:28,973 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-07-20 12:06:31,578 WARN L193 SmtUtils]: Spent 843.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-07-20 12:06:35,030 WARN L193 SmtUtils]: Spent 815.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-07-20 12:06:38,415 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 12:06:41,780 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-07-20 12:06:45,085 WARN L193 SmtUtils]: Spent 752.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-07-20 12:06:48,358 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-07-20 12:06:51,382 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 12:06:54,381 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 12:06:57,199 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-07-20 12:07:00,004 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-07-20 12:07:02,718 WARN L193 SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-07-20 12:07:05,334 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-20 12:07:07,844 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 12:07:10,289 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-20 12:07:12,505 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-20 12:07:14,590 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 12:07:16,580 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-20 12:07:18,441 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-20 12:07:20,223 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 12:07:21,894 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 12:07:23,433 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-20 12:07:24,786 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 12:07:26,022 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 12:07:37,773 WARN L193 SmtUtils]: Spent 2.81 s on a formula simplification that was a NOOP. DAG size: 385 [2020-07-20 12:07:37,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:07:37,792 INFO L93 Difference]: Finished difference Result 146 states and 209 transitions. [2020-07-20 12:07:37,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-07-20 12:07:37,794 INFO L78 Accepts]: Start accepts. Automaton has 134 states. Word has length 75 [2020-07-20 12:07:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:07:37,797 INFO L225 Difference]: With dead ends: 146 [2020-07-20 12:07:37,797 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 12:07:37,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8696 ImplicationChecksByTransitivity, 234.0s TimeCoverageRelationStatistics Valid=16984, Invalid=52448, Unknown=0, NotChecked=0, Total=69432 [2020-07-20 12:07:37,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 12:07:37,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-07-20 12:07:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-20 12:07:37,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 140 transitions. [2020-07-20 12:07:37,858 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 140 transitions. Word has length 75 [2020-07-20 12:07:37,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:07:37,859 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 140 transitions. [2020-07-20 12:07:37,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 134 states. [2020-07-20 12:07:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 140 transitions. [2020-07-20 12:07:37,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-20 12:07:37,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:07:37,862 INFO L422 BasicCegarLoop]: trace histogram [127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:07:38,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:07:38,071 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:07:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:07:38,072 INFO L82 PathProgramCache]: Analyzing trace with hash -858019666, now seen corresponding path program 7 times [2020-07-20 12:07:38,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:07:38,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838483477] [2020-07-20 12:07:38,073 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:07:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:07:38,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 516 conjunts are in the unsatisfiable core [2020-07-20 12:07:38,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:08:19,527 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 12:08:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:08:21,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 12:08:22,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 12:12:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:12:18,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838483477] [2020-07-20 12:12:18,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 12:12:18,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133] total 262 [2020-07-20 12:12:18,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870571886] [2020-07-20 12:12:18,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 262 states [2020-07-20 12:12:18,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:12:18,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 262 interpolants. [2020-07-20 12:12:18,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16654, Invalid=51728, Unknown=0, NotChecked=0, Total=68382 [2020-07-20 12:12:18,932 INFO L87 Difference]: Start difference. First operand 140 states and 140 transitions. Second operand 262 states. [2020-07-20 12:16:00,716 WARN L193 SmtUtils]: Spent 9.07 s on a formula simplification that was a NOOP. DAG size: 774 [2020-07-20 12:16:14,601 WARN L193 SmtUtils]: Spent 11.34 s on a formula simplification. DAG size of input: 775 DAG size of output: 520