/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-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:48:45,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:48:45,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:48:45,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:48:45,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:48:45,753 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:48:45,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:48:45,762 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:48:45,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:48:45,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:48:45,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:48:45,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:48:45,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:48:45,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:48:45,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:48:45,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:48:45,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:48:45,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:48:45,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:48:45,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:48:45,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:48:45,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:48:45,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:48:45,794 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:48:45,799 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:48:45,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:48:45,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:48:45,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:48:45,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:48:45,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:48:45,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:48:45,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:48:45,807 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:48:45,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:48:45,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:48:45,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:48:45,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:48:45,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:48:45,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:48:45,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:48:45,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:48:45,818 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 11:48:45,841 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:48:45,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:48:45,843 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:48:45,844 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:48:45,844 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:48:45,844 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:48:45,844 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:48:45,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:48:45,845 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:48:45,845 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:48:45,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:48:45,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:48:45,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:48:45,847 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:48:45,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:48:45,847 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:48:45,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:48:45,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:48:45,848 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:48:45,848 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:48:45,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:48:45,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:48:45,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:48:45,849 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:48:45,850 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:48:45,850 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:48:45,850 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:45,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:48:45,850 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:48:45,850 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 11:48:46,153 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:48:46,165 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:48:46,168 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:48:46,170 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:48:46,170 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:48:46,171 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-07-20 11:48:46,246 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/845ec9a0c/ca167e24bdaa4b379cbe3063fa8250aa/FLAGcc63893bb [2020-07-20 11:48:46,713 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:48:46,714 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-07-20 11:48:46,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/845ec9a0c/ca167e24bdaa4b379cbe3063fa8250aa/FLAGcc63893bb [2020-07-20 11:48:47,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/845ec9a0c/ca167e24bdaa4b379cbe3063fa8250aa [2020-07-20 11:48:47,115 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:48:47,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:48:47,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:47,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:48:47,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:48:47,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:47" (1/1) ... [2020-07-20 11:48:47,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c612bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:47, skipping insertion in model container [2020-07-20 11:48:47,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:48:47" (1/1) ... [2020-07-20 11:48:47,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:48:47,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:48:47,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:47,345 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:48:47,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:48:47,395 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:48:47,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:47 WrapperNode [2020-07-20 11:48:47,397 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:48:47,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:48:47,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:48:47,398 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:48:47,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:47" (1/1) ... [2020-07-20 11:48:47,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:47" (1/1) ... [2020-07-20 11:48:47,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:47" (1/1) ... [2020-07-20 11:48:47,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:47" (1/1) ... [2020-07-20 11:48:47,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:47" (1/1) ... [2020-07-20 11:48:47,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:47" (1/1) ... [2020-07-20 11:48:47,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:47" (1/1) ... [2020-07-20 11:48:47,519 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:48:47,520 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:48:47,520 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:48:47,520 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:48:47,521 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:47" (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 11:48:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:48:47,594 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:48:47,595 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:48:47,595 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:48:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:48:47,595 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:48:47,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:48:47,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 11:48:47,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:48:47,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:48:47,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:48:47,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:48:47,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:48:47,806 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:48:47,807 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-20 11:48:47,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:47 BoogieIcfgContainer [2020-07-20 11:48:47,814 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:48:47,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:48:47,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:48:47,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:48:47,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:48:47" (1/3) ... [2020-07-20 11:48:47,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a2cf97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:47, skipping insertion in model container [2020-07-20 11:48:47,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:48:47" (2/3) ... [2020-07-20 11:48:47,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a2cf97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:48:47, skipping insertion in model container [2020-07-20 11:48:47,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:48:47" (3/3) ... [2020-07-20 11:48:47,827 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-07-20 11:48:47,865 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:48:47,883 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:48:47,920 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:48:47,957 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:48:47,957 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:48:47,958 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:48:47,958 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:48:47,958 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:48:47,958 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:48:47,958 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:48:47,958 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:48:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-20 11:48:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 11:48:47,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:47,980 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:47,980 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:47,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:47,985 INFO L82 PathProgramCache]: Analyzing trace with hash -267856937, now seen corresponding path program 1 times [2020-07-20 11:48:47,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:47,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356526275] [2020-07-20 11:48:47,994 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 11:48:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:48,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:48:48,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:48,102 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 11:48:48,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:48,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356526275] [2020-07-20 11:48:48,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:48,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:48:48,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992374367] [2020-07-20 11:48:48,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:48:48,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:48,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:48:48,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:48,126 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-07-20 11:48:48,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:48,149 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-07-20 11:48:48,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:48:48,151 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-07-20 11:48:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:48,159 INFO L225 Difference]: With dead ends: 34 [2020-07-20 11:48:48,160 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 11:48:48,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:48:48,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 11:48:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 11:48:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 11:48:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-20 11:48:48,201 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-20 11:48:48,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:48,202 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-20 11:48:48,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:48:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-20 11:48:48,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 11:48:48,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:48,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:48,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:48,417 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:48,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:48,419 INFO L82 PathProgramCache]: Analyzing trace with hash -439631843, now seen corresponding path program 1 times [2020-07-20 11:48:48,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:48,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278841937] [2020-07-20 11:48:48,421 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 11:48:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:48,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 11:48:48,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:48,503 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 11:48:48,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:48:48,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278841937] [2020-07-20 11:48:48,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:48:48,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 11:48:48,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359593675] [2020-07-20 11:48:48,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 11:48:48,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 11:48:48,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:48:48,508 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 3 states. [2020-07-20 11:48:48,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:48,532 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-07-20 11:48:48,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 11:48:48,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-20 11:48:48,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:48,534 INFO L225 Difference]: With dead ends: 22 [2020-07-20 11:48:48,534 INFO L226 Difference]: Without dead ends: 16 [2020-07-20 11:48:48,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 11:48:48,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-07-20 11:48:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-07-20 11:48:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-07-20 11:48:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-07-20 11:48:48,540 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-07-20 11:48:48,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:48,541 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-07-20 11:48:48,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 11:48:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-07-20 11:48:48,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:48:48,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:48,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:48,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:48,755 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:48,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:48,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1874839487, now seen corresponding path program 1 times [2020-07-20 11:48:48,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:48,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584675751] [2020-07-20 11:48:48,758 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 11:48:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:48,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 11:48:48,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:48,843 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 11:48:48,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:48:48,880 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 11:48:48,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584675751] [2020-07-20 11:48:48,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:48:48,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-07-20 11:48:48,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26122091] [2020-07-20 11:48:48,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:48:48,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:48,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:48:48,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:48:48,883 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-07-20 11:48:48,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:48,919 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-07-20 11:48:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:48:48,920 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-07-20 11:48:48,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:48,921 INFO L225 Difference]: With dead ends: 27 [2020-07-20 11:48:48,921 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 11:48:48,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:48:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 11:48:48,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 11:48:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 11:48:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-07-20 11:48:48,928 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2020-07-20 11:48:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:48,929 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-07-20 11:48:48,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:48:48,929 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-07-20 11:48:48,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-20 11:48:48,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:48,930 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:49,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:49,146 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:49,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:49,147 INFO L82 PathProgramCache]: Analyzing trace with hash 815274917, now seen corresponding path program 2 times [2020-07-20 11:48:49,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:49,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92388717] [2020-07-20 11:48:49,148 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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:49,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:48:49,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:49,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:48:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:49,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92388717] [2020-07-20 11:48:49,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:48:49,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-07-20 11:48:49,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71737009] [2020-07-20 11:48:49,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:48:49,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:49,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:48:49,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:48:49,345 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 12 states. [2020-07-20 11:48:49,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:49,425 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-07-20 11:48:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:48:49,425 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-07-20 11:48:49,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:49,427 INFO L225 Difference]: With dead ends: 39 [2020-07-20 11:48:49,427 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 11:48:49,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:48:49,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 11:48:49,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 11:48:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 11:48:49,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-07-20 11:48:49,435 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2020-07-20 11:48:49,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:49,436 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-07-20 11:48:49,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:48:49,436 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-07-20 11:48:49,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-20 11:48:49,437 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:49,437 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:49,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:49,652 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:49,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash 489362929, now seen corresponding path program 3 times [2020-07-20 11:48:49,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:49,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116184613] [2020-07-20 11:48:49,655 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 11:48:49,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:49,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:48:49,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:49,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:48:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:50,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116184613] [2020-07-20 11:48:50,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:48:50,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-07-20 11:48:50,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084439385] [2020-07-20 11:48:50,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 11:48:50,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:50,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 11:48:50,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:48:50,098 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 24 states. [2020-07-20 11:48:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:50,208 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-07-20 11:48:50,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 11:48:50,209 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 32 [2020-07-20 11:48:50,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:50,210 INFO L225 Difference]: With dead ends: 63 [2020-07-20 11:48:50,210 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:48:50,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:48:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:48:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 11:48:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 11:48:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-07-20 11:48:50,221 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2020-07-20 11:48:50,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:50,221 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-07-20 11:48:50,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 11:48:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-07-20 11:48:50,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-20 11:48:50,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:50,223 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:50,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:50,439 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:50,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1038560119, now seen corresponding path program 4 times [2020-07-20 11:48:50,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:50,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376442105] [2020-07-20 11:48:50,441 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 11:48:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:50,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 11:48:50,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:50,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:48:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:51,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376442105] [2020-07-20 11:48:51,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:48:51,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2020-07-20 11:48:51,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824545445] [2020-07-20 11:48:51,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-20 11:48:51,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:51,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-20 11:48:51,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 11:48:51,846 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 48 states. [2020-07-20 11:48:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:52,077 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2020-07-20 11:48:52,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-07-20 11:48:52,084 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 56 [2020-07-20 11:48:52,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:52,085 INFO L225 Difference]: With dead ends: 111 [2020-07-20 11:48:52,085 INFO L226 Difference]: Without dead ends: 105 [2020-07-20 11:48:52,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 11:48:52,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-20 11:48:52,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-07-20 11:48:52,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-20 11:48:52,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-07-20 11:48:52,107 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 56 [2020-07-20 11:48:52,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:52,107 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-07-20 11:48:52,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-20 11:48:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-07-20 11:48:52,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-20 11:48:52,114 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:52,114 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:52,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:52,327 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:52,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:52,328 INFO L82 PathProgramCache]: Analyzing trace with hash 382171577, now seen corresponding path program 5 times [2020-07-20 11:48:52,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:52,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101589217] [2020-07-20 11:48:52,329 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 11:48:52,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:52,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-20 11:48:52,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:48:53,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:53,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:48:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:48:57,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101589217] [2020-07-20 11:48:57,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:48:57,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2020-07-20 11:48:57,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167361470] [2020-07-20 11:48:57,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-07-20 11:48:57,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:48:57,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-07-20 11:48:57,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-20 11:48:57,254 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 96 states. [2020-07-20 11:48:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:48:57,699 INFO L93 Difference]: Finished difference Result 207 states and 254 transitions. [2020-07-20 11:48:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-07-20 11:48:57,700 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 104 [2020-07-20 11:48:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:48:57,704 INFO L225 Difference]: With dead ends: 207 [2020-07-20 11:48:57,707 INFO L226 Difference]: Without dead ends: 201 [2020-07-20 11:48:57,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2020-07-20 11:48:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-20 11:48:57,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2020-07-20 11:48:57,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-20 11:48:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2020-07-20 11:48:57,735 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 104 [2020-07-20 11:48:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:48:57,735 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2020-07-20 11:48:57,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-07-20 11:48:57,736 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2020-07-20 11:48:57,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-07-20 11:48:57,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:48:57,738 INFO L422 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:48:57,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:48:57,953 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:48:57,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:48:57,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1695638553, now seen corresponding path program 6 times [2020-07-20 11:48:57,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:48:57,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821844185] [2020-07-20 11:48:57,954 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 11:48:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:48:58,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-20 11:48:58,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:02,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:02,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:49:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:16,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821844185] [2020-07-20 11:49:16,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:49:16,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 192 [2020-07-20 11:49:16,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120308049] [2020-07-20 11:49:16,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 192 states [2020-07-20 11:49:16,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:49:16,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2020-07-20 11:49:16,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2020-07-20 11:49:16,589 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand 192 states. [2020-07-20 11:49:17,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:49:17,671 INFO L93 Difference]: Finished difference Result 399 states and 494 transitions. [2020-07-20 11:49:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2020-07-20 11:49:17,677 INFO L78 Accepts]: Start accepts. Automaton has 192 states. Word has length 200 [2020-07-20 11:49:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:49:17,681 INFO L225 Difference]: With dead ends: 399 [2020-07-20 11:49:17,681 INFO L226 Difference]: Without dead ends: 393 [2020-07-20 11:49:17,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=18336, Invalid=18336, Unknown=0, NotChecked=0, Total=36672 [2020-07-20 11:49:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-07-20 11:49:17,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2020-07-20 11:49:17,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-07-20 11:49:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 393 transitions. [2020-07-20 11:49:17,730 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 393 transitions. Word has length 200 [2020-07-20 11:49:17,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:49:17,736 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 393 transitions. [2020-07-20 11:49:17,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 192 states. [2020-07-20 11:49:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 393 transitions. [2020-07-20 11:49:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-07-20 11:49:17,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:49:17,753 INFO L422 BasicCegarLoop]: trace histogram [190, 190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:49:17,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:17,967 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:49:17,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:49:17,968 INFO L82 PathProgramCache]: Analyzing trace with hash 576174297, now seen corresponding path program 7 times [2020-07-20 11:49:17,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:49:17,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280554769] [2020-07-20 11:49:17,970 INFO L95 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 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:49:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:49:18,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 192 conjunts are in the unsatisfiable core [2020-07-20 11:49:18,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:49:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:49:37,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:50:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 36100 backedges. 0 proven. 36100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:50:38,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280554769] [2020-07-20 11:50:38,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:50:38,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [193, 193] total 384 [2020-07-20 11:50:38,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962906056] [2020-07-20 11:50:38,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 384 states [2020-07-20 11:50:38,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:50:38,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2020-07-20 11:50:38,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2020-07-20 11:50:38,474 INFO L87 Difference]: Start difference. First operand 393 states and 393 transitions. Second operand 384 states. [2020-07-20 11:50:44,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:50:44,502 INFO L93 Difference]: Finished difference Result 783 states and 974 transitions. [2020-07-20 11:50:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2020-07-20 11:50:44,503 INFO L78 Accepts]: Start accepts. Automaton has 384 states. Word has length 392 [2020-07-20 11:50:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:50:44,508 INFO L225 Difference]: With dead ends: 783 [2020-07-20 11:50:44,508 INFO L226 Difference]: Without dead ends: 777 [2020-07-20 11:50:44,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 783 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.8s TimeCoverageRelationStatistics Valid=73536, Invalid=73536, Unknown=0, NotChecked=0, Total=147072 [2020-07-20 11:50:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2020-07-20 11:50:44,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 777. [2020-07-20 11:50:44,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 777 states. [2020-07-20 11:50:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 777 transitions. [2020-07-20 11:50:44,537 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 777 transitions. Word has length 392 [2020-07-20 11:50:44,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:50:44,538 INFO L479 AbstractCegarLoop]: Abstraction has 777 states and 777 transitions. [2020-07-20 11:50:44,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 384 states. [2020-07-20 11:50:44,539 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 777 transitions. [2020-07-20 11:50:44,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 777 [2020-07-20 11:50:44,558 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:50:44,559 INFO L422 BasicCegarLoop]: trace histogram [382, 382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:50:44,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:50:44,774 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:50:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:50:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2018614695, now seen corresponding path program 8 times [2020-07-20 11:50:44,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:50:44,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364262206] [2020-07-20 11:50:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:50:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:50:45,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 384 conjunts are in the unsatisfiable core [2020-07-20 11:50:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:52:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:52:13,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:58:00,560 INFO L134 CoverageAnalysis]: Checked inductivity of 145924 backedges. 0 proven. 145924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:58:00,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364262206] [2020-07-20 11:58:00,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:58:00,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [385, 385] total 768 [2020-07-20 11:58:00,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158299002] [2020-07-20 11:58:00,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 768 states [2020-07-20 11:58:00,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:58:00,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2020-07-20 11:58:00,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294528, Invalid=294528, Unknown=0, NotChecked=0, Total=589056 [2020-07-20 11:58:00,619 INFO L87 Difference]: Start difference. First operand 777 states and 777 transitions. Second operand 768 states. [2020-07-20 11:58:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:58:48,235 INFO L93 Difference]: Finished difference Result 1551 states and 1934 transitions. [2020-07-20 11:58:48,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2020-07-20 11:58:48,237 INFO L78 Accepts]: Start accepts. Automaton has 768 states. Word has length 776 [2020-07-20 11:58:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:58:48,246 INFO L225 Difference]: With dead ends: 1551 [2020-07-20 11:58:48,246 INFO L226 Difference]: Without dead ends: 1545 [2020-07-20 11:58:48,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1551 GetRequests, 785 SyntacticMatches, 0 SemanticMatches, 766 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 434.2s TimeCoverageRelationStatistics Valid=294528, Invalid=294528, Unknown=0, NotChecked=0, Total=589056 [2020-07-20 11:58:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2020-07-20 11:58:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1545. [2020-07-20 11:58:48,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1545 states. [2020-07-20 11:58:48,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1545 states to 1545 states and 1545 transitions. [2020-07-20 11:58:48,302 INFO L78 Accepts]: Start accepts. Automaton has 1545 states and 1545 transitions. Word has length 776 [2020-07-20 11:58:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:58:48,303 INFO L479 AbstractCegarLoop]: Abstraction has 1545 states and 1545 transitions. [2020-07-20 11:58:48,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 768 states. [2020-07-20 11:58:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1545 states and 1545 transitions. [2020-07-20 11:58:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1545 [2020-07-20 11:58:48,325 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:58:48,326 INFO L422 BasicCegarLoop]: trace histogram [766, 766, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:58:48,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:58:48,536 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:58:48,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:58:48,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1032041817, now seen corresponding path program 9 times [2020-07-20 11:58:48,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:58:48,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541574558] [2020-07-20 11:58:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:58:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:58:49,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 3114 conjuncts, 768 conjunts are in the unsatisfiable core [2020-07-20 11:58:49,197 INFO L286 TraceCheckSpWp]: Computing forward predicates...