/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:26:15,816 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:26:15,818 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:26:15,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:26:15,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:26:15,831 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:26:15,833 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:26:15,834 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:26:15,837 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:26:15,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:26:15,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:26:15,840 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:26:15,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:26:15,841 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:26:15,842 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:26:15,843 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:26:15,844 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:26:15,845 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:26:15,847 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:26:15,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:26:15,850 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:26:15,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:26:15,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:26:15,854 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:26:15,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 17:26:15,857 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 17:26:15,857 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 17:26:15,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 17:26:15,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 17:26:15,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 17:26:15,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 17:26:15,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 17:26:15,862 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 17:26:15,862 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 17:26:15,863 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 17:26:15,864 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 17:26:15,864 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 17:26:15,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 17:26:15,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:26:15,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:26:15,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:26:15,867 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 [2020-07-21 17:26:15,882 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:26:15,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:26:15,884 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:26:15,884 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:26:15,884 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:26:15,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:26:15,885 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:26:15,885 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:26:15,885 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:26:15,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:26:15,885 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:26:15,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:26:15,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:26:15,886 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:26:15,886 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:26:15,886 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:26:15,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:26:15,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:26:15,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:26:15,887 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:26:15,887 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:26:15,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:26:15,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:26:15,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:26:15,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:26:15,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:26:15,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:15,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:26:15,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:26:15,889 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 17:26:16,185 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:26:16,199 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:26:16,202 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:26:16,204 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:26:16,204 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:26:16,205 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 17:26:16,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2542e851/b98034ff59244bb5a39524d3b43fd612/FLAGba69ce6b6 [2020-07-21 17:26:17,062 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:26:17,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 17:26:17,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2542e851/b98034ff59244bb5a39524d3b43fd612/FLAGba69ce6b6 [2020-07-21 17:26:17,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2542e851/b98034ff59244bb5a39524d3b43fd612 [2020-07-21 17:26:17,177 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:26:17,180 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:26:17,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:26:17,182 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:26:17,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:26:17,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:26:17" (1/1) ... [2020-07-21 17:26:17,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c9c0b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:26:17, skipping insertion in model container [2020-07-21 17:26:17,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:26:17" (1/1) ... [2020-07-21 17:26:17,199 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:26:17,322 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:26:18,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:26:18,425 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:26:18,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:26:18,929 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:26:18,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:26:18 WrapperNode [2020-07-21 17:26:18,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:26:18,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:26:18,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:26:18,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:26:18,945 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:26:18" (1/1) ... [2020-07-21 17:26:18,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:26:18" (1/1) ... [2020-07-21 17:26:18,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:26:18" (1/1) ... [2020-07-21 17:26:18,972 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:26:18" (1/1) ... [2020-07-21 17:26:19,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:26:18" (1/1) ... [2020-07-21 17:26:19,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:26:18" (1/1) ... [2020-07-21 17:26:19,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:26:18" (1/1) ... [2020-07-21 17:26:19,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:26:19,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:26:19,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:26:19,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:26:19,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:26:18" (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 [2020-07-21 17:26:19,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:26:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:26:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:26:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:26:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:26:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 17:26:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 17:26:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 17:26:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:26:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:26:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 17:26:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 17:26:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 17:26:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 17:26:19,245 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 17:26:19,246 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 17:26:19,246 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 17:26:19,246 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 17:26:19,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:26:19,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:26:19,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:26:21,796 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:26:21,797 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:26:21,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:26:21 BoogieIcfgContainer [2020-07-21 17:26:21,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:26:21,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:26:21,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:26:21,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:26:21,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:26:17" (1/3) ... [2020-07-21 17:26:21,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17627e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:26:21, skipping insertion in model container [2020-07-21 17:26:21,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:26:18" (2/3) ... [2020-07-21 17:26:21,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17627e2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:26:21, skipping insertion in model container [2020-07-21 17:26:21,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:26:21" (3/3) ... [2020-07-21 17:26:21,819 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-21 17:26:21,830 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:26:21,840 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:26:21,856 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:26:21,882 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:26:21,882 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:26:21,882 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:26:21,883 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:26:21,883 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:26:21,883 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:26:21,883 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:26:21,883 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:26:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-21 17:26:21,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-21 17:26:21,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:21,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:21,955 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:21,960 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-21 17:26:21,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:21,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [559139920] [2020-07-21 17:26:21,969 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 17:26:22,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:22,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:22,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 2101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:26:22,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:22,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:22,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:22,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [559139920] [2020-07-21 17:26:22,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:22,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:26:22,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527132830] [2020-07-21 17:26:22,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:26:22,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:22,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:26:22,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:26:22,882 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-21 17:26:23,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:23,212 INFO L93 Difference]: Finished difference Result 2311 states and 4106 transitions. [2020-07-21 17:26:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:26:23,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-21 17:26:23,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:23,245 INFO L225 Difference]: With dead ends: 2311 [2020-07-21 17:26:23,245 INFO L226 Difference]: Without dead ends: 1535 [2020-07-21 17:26:23,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:26:23,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2020-07-21 17:26:23,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1533. [2020-07-21 17:26:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1533 states. [2020-07-21 17:26:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1533 states to 1533 states and 2382 transitions. [2020-07-21 17:26:23,391 INFO L78 Accepts]: Start accepts. Automaton has 1533 states and 2382 transitions. Word has length 324 [2020-07-21 17:26:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:23,392 INFO L479 AbstractCegarLoop]: Abstraction has 1533 states and 2382 transitions. [2020-07-21 17:26:23,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:26:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states and 2382 transitions. [2020-07-21 17:26:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 17:26:23,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:23,403 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:23,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:23,617 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:23,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:23,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1039151531, now seen corresponding path program 1 times [2020-07-21 17:26:23,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:23,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290416259] [2020-07-21 17:26:23,619 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 17:26:24,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:24,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:24,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 2104 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:24,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:24,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290416259] [2020-07-21 17:26:24,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:24,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:24,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947690685] [2020-07-21 17:26:24,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:24,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:24,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:24,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:24,295 INFO L87 Difference]: Start difference. First operand 1533 states and 2382 transitions. Second operand 3 states. [2020-07-21 17:26:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:24,506 INFO L93 Difference]: Finished difference Result 4371 states and 6753 transitions. [2020-07-21 17:26:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:24,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 17:26:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:24,524 INFO L225 Difference]: With dead ends: 4371 [2020-07-21 17:26:24,525 INFO L226 Difference]: Without dead ends: 2965 [2020-07-21 17:26:24,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:24,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2020-07-21 17:26:24,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2963. [2020-07-21 17:26:24,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2963 states. [2020-07-21 17:26:24,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2963 states to 2963 states and 4572 transitions. [2020-07-21 17:26:24,683 INFO L78 Accepts]: Start accepts. Automaton has 2963 states and 4572 transitions. Word has length 326 [2020-07-21 17:26:24,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:24,684 INFO L479 AbstractCegarLoop]: Abstraction has 2963 states and 4572 transitions. [2020-07-21 17:26:24,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 2963 states and 4572 transitions. [2020-07-21 17:26:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-21 17:26:24,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:24,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:24,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:24,911 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:24,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1642540496, now seen corresponding path program 1 times [2020-07-21 17:26:24,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:24,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914493595] [2020-07-21 17:26:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 17:26:25,218 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:26:25,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:25,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:25,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:25,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914493595] [2020-07-21 17:26:25,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:25,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:25,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738210637] [2020-07-21 17:26:25,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:25,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:25,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:25,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:25,298 INFO L87 Difference]: Start difference. First operand 2963 states and 4572 transitions. Second operand 3 states. [2020-07-21 17:26:25,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:25,537 INFO L93 Difference]: Finished difference Result 8707 states and 13399 transitions. [2020-07-21 17:26:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:25,538 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-21 17:26:25,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:25,575 INFO L225 Difference]: With dead ends: 8707 [2020-07-21 17:26:25,576 INFO L226 Difference]: Without dead ends: 5838 [2020-07-21 17:26:25,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:25,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5838 states. [2020-07-21 17:26:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5838 to 2976. [2020-07-21 17:26:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2976 states. [2020-07-21 17:26:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2976 states to 2976 states and 4588 transitions. [2020-07-21 17:26:25,885 INFO L78 Accepts]: Start accepts. Automaton has 2976 states and 4588 transitions. Word has length 326 [2020-07-21 17:26:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:25,886 INFO L479 AbstractCegarLoop]: Abstraction has 2976 states and 4588 transitions. [2020-07-21 17:26:25,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2976 states and 4588 transitions. [2020-07-21 17:26:25,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-21 17:26:25,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:25,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:26,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:26,115 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:26,116 INFO L82 PathProgramCache]: Analyzing trace with hash -668412942, now seen corresponding path program 1 times [2020-07-21 17:26:26,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:26,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733252595] [2020-07-21 17:26:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 17:26:26,518 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:26,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:26,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 2106 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:26,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:26,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:26,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:26,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733252595] [2020-07-21 17:26:26,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:26,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:26,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622617440] [2020-07-21 17:26:26,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:26,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:26,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:26,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:26,613 INFO L87 Difference]: Start difference. First operand 2976 states and 4588 transitions. Second operand 3 states. [2020-07-21 17:26:26,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:26,910 INFO L93 Difference]: Finished difference Result 8732 states and 13432 transitions. [2020-07-21 17:26:26,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:26,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-21 17:26:26,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:26,940 INFO L225 Difference]: With dead ends: 8732 [2020-07-21 17:26:26,940 INFO L226 Difference]: Without dead ends: 5821 [2020-07-21 17:26:26,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:26,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5821 states. [2020-07-21 17:26:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5821 to 2992. [2020-07-21 17:26:27,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2992 states. [2020-07-21 17:26:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2992 states to 2992 states and 4608 transitions. [2020-07-21 17:26:27,118 INFO L78 Accepts]: Start accepts. Automaton has 2992 states and 4608 transitions. Word has length 327 [2020-07-21 17:26:27,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:27,118 INFO L479 AbstractCegarLoop]: Abstraction has 2992 states and 4608 transitions. [2020-07-21 17:26:27,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:27,118 INFO L276 IsEmpty]: Start isEmpty. Operand 2992 states and 4608 transitions. [2020-07-21 17:26:27,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 17:26:27,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:27,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:27,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:27,344 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:27,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:27,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1292238374, now seen corresponding path program 1 times [2020-07-21 17:26:27,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:27,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024362064] [2020-07-21 17:26:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 17:26:27,884 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:27,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:27,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:27,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:28,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:28,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024362064] [2020-07-21 17:26:28,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:28,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:28,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961575777] [2020-07-21 17:26:28,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:28,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:28,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:28,146 INFO L87 Difference]: Start difference. First operand 2992 states and 4608 transitions. Second operand 3 states. [2020-07-21 17:26:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:28,450 INFO L93 Difference]: Finished difference Result 8695 states and 13359 transitions. [2020-07-21 17:26:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:28,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-21 17:26:28,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:28,484 INFO L225 Difference]: With dead ends: 8695 [2020-07-21 17:26:28,485 INFO L226 Difference]: Without dead ends: 5860 [2020-07-21 17:26:28,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5860 states. [2020-07-21 17:26:28,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5860 to 5858. [2020-07-21 17:26:28,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5858 states. [2020-07-21 17:26:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5858 states to 5858 states and 8969 transitions. [2020-07-21 17:26:28,787 INFO L78 Accepts]: Start accepts. Automaton has 5858 states and 8969 transitions. Word has length 328 [2020-07-21 17:26:28,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:28,789 INFO L479 AbstractCegarLoop]: Abstraction has 5858 states and 8969 transitions. [2020-07-21 17:26:28,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:28,789 INFO L276 IsEmpty]: Start isEmpty. Operand 5858 states and 8969 transitions. [2020-07-21 17:26:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-21 17:26:28,804 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:28,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:29,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:29,019 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:29,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1969038845, now seen corresponding path program 1 times [2020-07-21 17:26:29,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:29,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957199260] [2020-07-21 17:26:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 17:26:29,268 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:26:29,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:29,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:26:29,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:29,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:29,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957199260] [2020-07-21 17:26:29,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:29,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:26:29,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437950641] [2020-07-21 17:26:29,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:26:29,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:26:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:26:29,450 INFO L87 Difference]: Start difference. First operand 5858 states and 8969 transitions. Second operand 4 states. [2020-07-21 17:26:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:29,832 INFO L93 Difference]: Finished difference Result 15968 states and 24270 transitions. [2020-07-21 17:26:29,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:26:29,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-21 17:26:29,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:29,885 INFO L225 Difference]: With dead ends: 15968 [2020-07-21 17:26:29,886 INFO L226 Difference]: Without dead ends: 10726 [2020-07-21 17:26:29,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:26:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10726 states. [2020-07-21 17:26:30,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10726 to 6208. [2020-07-21 17:26:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6208 states. [2020-07-21 17:26:30,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6208 states to 6208 states and 9566 transitions. [2020-07-21 17:26:30,211 INFO L78 Accepts]: Start accepts. Automaton has 6208 states and 9566 transitions. Word has length 328 [2020-07-21 17:26:30,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:30,212 INFO L479 AbstractCegarLoop]: Abstraction has 6208 states and 9566 transitions. [2020-07-21 17:26:30,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:26:30,212 INFO L276 IsEmpty]: Start isEmpty. Operand 6208 states and 9566 transitions. [2020-07-21 17:26:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:26:30,233 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:30,234 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:30,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:30,448 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:30,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:30,449 INFO L82 PathProgramCache]: Analyzing trace with hash -244524821, now seen corresponding path program 1 times [2020-07-21 17:26:30,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:30,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808551488] [2020-07-21 17:26:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 17:26:30,698 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:26:30,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:30,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 1150 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:30,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:30,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:30,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:30,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808551488] [2020-07-21 17:26:30,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:30,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:30,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409520255] [2020-07-21 17:26:30,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:30,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:30,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:30,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:30,836 INFO L87 Difference]: Start difference. First operand 6208 states and 9566 transitions. Second operand 3 states. [2020-07-21 17:26:31,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:31,195 INFO L93 Difference]: Finished difference Result 16654 states and 25271 transitions. [2020-07-21 17:26:31,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:31,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 17:26:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:31,224 INFO L225 Difference]: With dead ends: 16654 [2020-07-21 17:26:31,225 INFO L226 Difference]: Without dead ends: 11435 [2020-07-21 17:26:31,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11435 states. [2020-07-21 17:26:31,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11435 to 6313. [2020-07-21 17:26:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6313 states. [2020-07-21 17:26:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6313 states to 6313 states and 9700 transitions. [2020-07-21 17:26:31,537 INFO L78 Accepts]: Start accepts. Automaton has 6313 states and 9700 transitions. Word has length 330 [2020-07-21 17:26:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:31,538 INFO L479 AbstractCegarLoop]: Abstraction has 6313 states and 9700 transitions. [2020-07-21 17:26:31,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 6313 states and 9700 transitions. [2020-07-21 17:26:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:26:31,555 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:31,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:31,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:31,770 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:31,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:31,771 INFO L82 PathProgramCache]: Analyzing trace with hash -958899585, now seen corresponding path program 1 times [2020-07-21 17:26:31,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:31,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37253694] [2020-07-21 17:26:31,773 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 17:26:32,309 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:32,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:32,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 2116 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:32,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:32,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:32,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:32,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37253694] [2020-07-21 17:26:32,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:32,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:32,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355729270] [2020-07-21 17:26:32,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:32,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:32,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:32,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:32,399 INFO L87 Difference]: Start difference. First operand 6313 states and 9700 transitions. Second operand 3 states. [2020-07-21 17:26:32,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:32,688 INFO L93 Difference]: Finished difference Result 12729 states and 19626 transitions. [2020-07-21 17:26:32,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:32,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 17:26:32,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:32,708 INFO L225 Difference]: With dead ends: 12729 [2020-07-21 17:26:32,708 INFO L226 Difference]: Without dead ends: 8499 [2020-07-21 17:26:32,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:32,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8499 states. [2020-07-21 17:26:33,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8499 to 7297. [2020-07-21 17:26:33,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7297 states. [2020-07-21 17:26:33,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7297 states to 7297 states and 11308 transitions. [2020-07-21 17:26:33,039 INFO L78 Accepts]: Start accepts. Automaton has 7297 states and 11308 transitions. Word has length 330 [2020-07-21 17:26:33,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:33,040 INFO L479 AbstractCegarLoop]: Abstraction has 7297 states and 11308 transitions. [2020-07-21 17:26:33,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:33,040 INFO L276 IsEmpty]: Start isEmpty. Operand 7297 states and 11308 transitions. [2020-07-21 17:26:33,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 17:26:33,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:33,054 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:33,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:33,270 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:33,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:33,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1744387620, now seen corresponding path program 1 times [2020-07-21 17:26:33,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:33,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695719102] [2020-07-21 17:26:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 17:26:33,606 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:26:33,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:33,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:26:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:33,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:33,697 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:33,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695719102] [2020-07-21 17:26:33,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:33,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:26:33,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358626843] [2020-07-21 17:26:33,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:26:33,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:33,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:26:33,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:26:33,705 INFO L87 Difference]: Start difference. First operand 7297 states and 11308 transitions. Second operand 4 states. [2020-07-21 17:26:34,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:34,074 INFO L93 Difference]: Finished difference Result 16212 states and 24998 transitions. [2020-07-21 17:26:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:26:34,075 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-21 17:26:34,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:34,097 INFO L225 Difference]: With dead ends: 16212 [2020-07-21 17:26:34,097 INFO L226 Difference]: Without dead ends: 8273 [2020-07-21 17:26:34,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:26:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8273 states. [2020-07-21 17:26:34,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8273 to 8271. [2020-07-21 17:26:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8271 states. [2020-07-21 17:26:34,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8271 states to 8271 states and 12711 transitions. [2020-07-21 17:26:34,485 INFO L78 Accepts]: Start accepts. Automaton has 8271 states and 12711 transitions. Word has length 331 [2020-07-21 17:26:34,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:34,485 INFO L479 AbstractCegarLoop]: Abstraction has 8271 states and 12711 transitions. [2020-07-21 17:26:34,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:26:34,486 INFO L276 IsEmpty]: Start isEmpty. Operand 8271 states and 12711 transitions. [2020-07-21 17:26:34,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:26:34,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:34,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:34,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:34,715 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:34,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:34,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1050521134, now seen corresponding path program 1 times [2020-07-21 17:26:34,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:34,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410331883] [2020-07-21 17:26:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 17:26:35,051 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:26:35,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:35,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:26:35,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:35,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:35,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410331883] [2020-07-21 17:26:35,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:35,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:26:35,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056962920] [2020-07-21 17:26:35,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:26:35,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:35,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:26:35,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:26:35,219 INFO L87 Difference]: Start difference. First operand 8271 states and 12711 transitions. Second operand 9 states. [2020-07-21 17:26:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:42,057 INFO L93 Difference]: Finished difference Result 46938 states and 73609 transitions. [2020-07-21 17:26:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 17:26:42,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 332 [2020-07-21 17:26:42,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:42,124 INFO L225 Difference]: With dead ends: 46938 [2020-07-21 17:26:42,124 INFO L226 Difference]: Without dead ends: 45190 [2020-07-21 17:26:42,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 17:26:42,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45190 states. [2020-07-21 17:26:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45190 to 19490. [2020-07-21 17:26:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19490 states. [2020-07-21 17:26:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19490 states to 19490 states and 30275 transitions. [2020-07-21 17:26:44,524 INFO L78 Accepts]: Start accepts. Automaton has 19490 states and 30275 transitions. Word has length 332 [2020-07-21 17:26:44,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:44,525 INFO L479 AbstractCegarLoop]: Abstraction has 19490 states and 30275 transitions. [2020-07-21 17:26:44,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:26:44,525 INFO L276 IsEmpty]: Start isEmpty. Operand 19490 states and 30275 transitions. [2020-07-21 17:26:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:26:44,549 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:44,549 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:44,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:44,765 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:44,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:44,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1366856249, now seen corresponding path program 1 times [2020-07-21 17:26:44,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:44,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144172014] [2020-07-21 17:26:44,767 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 [2020-07-21 17:26:45,020 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:26:45,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:26:45,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:45,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:45,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144172014] [2020-07-21 17:26:45,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:45,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:26:45,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775567676] [2020-07-21 17:26:45,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:26:45,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:45,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:26:45,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:26:45,330 INFO L87 Difference]: Start difference. First operand 19490 states and 30275 transitions. Second operand 4 states. [2020-07-21 17:26:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:47,020 INFO L93 Difference]: Finished difference Result 42102 states and 66457 transitions. [2020-07-21 17:26:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:26:47,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 17:26:47,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:47,078 INFO L225 Difference]: With dead ends: 42102 [2020-07-21 17:26:47,079 INFO L226 Difference]: Without dead ends: 33722 [2020-07-21 17:26:47,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:26:47,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33722 states. [2020-07-21 17:26:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33722 to 33720. [2020-07-21 17:26:49,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33720 states. [2020-07-21 17:26:49,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33720 states to 33720 states and 52567 transitions. [2020-07-21 17:26:49,476 INFO L78 Accepts]: Start accepts. Automaton has 33720 states and 52567 transitions. Word has length 332 [2020-07-21 17:26:49,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:49,477 INFO L479 AbstractCegarLoop]: Abstraction has 33720 states and 52567 transitions. [2020-07-21 17:26:49,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:26:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 33720 states and 52567 transitions. [2020-07-21 17:26:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:26:49,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:49,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:49,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:49,704 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:49,705 INFO L82 PathProgramCache]: Analyzing trace with hash -647054575, now seen corresponding path program 1 times [2020-07-21 17:26:49,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:49,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673701172] [2020-07-21 17:26:49,707 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:50,082 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:50,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:50,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 2122 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:26:50,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:50,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:50,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673701172] [2020-07-21 17:26:50,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:50,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 17:26:50,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112286991] [2020-07-21 17:26:50,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 17:26:50,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:50,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 17:26:50,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 17:26:50,298 INFO L87 Difference]: Start difference. First operand 33720 states and 52567 transitions. Second operand 8 states. [2020-07-21 17:26:53,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:53,644 INFO L93 Difference]: Finished difference Result 53999 states and 84724 transitions. [2020-07-21 17:26:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 17:26:53,645 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 332 [2020-07-21 17:26:53,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:53,710 INFO L225 Difference]: With dead ends: 53999 [2020-07-21 17:26:53,711 INFO L226 Difference]: Without dead ends: 36955 [2020-07-21 17:26:53,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 17:26:53,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36955 states. [2020-07-21 17:26:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36955 to 17768. [2020-07-21 17:26:55,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17768 states. [2020-07-21 17:26:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17768 states to 17768 states and 27178 transitions. [2020-07-21 17:26:55,122 INFO L78 Accepts]: Start accepts. Automaton has 17768 states and 27178 transitions. Word has length 332 [2020-07-21 17:26:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:55,123 INFO L479 AbstractCegarLoop]: Abstraction has 17768 states and 27178 transitions. [2020-07-21 17:26:55,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 17:26:55,123 INFO L276 IsEmpty]: Start isEmpty. Operand 17768 states and 27178 transitions. [2020-07-21 17:26:55,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:26:55,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:55,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:55,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:55,334 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:55,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:55,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1174737006, now seen corresponding path program 1 times [2020-07-21 17:26:55,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:55,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777312448] [2020-07-21 17:26:55,336 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:55,730 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:26:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:55,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 2119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:26:55,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:55,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:55,839 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:55,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777312448] [2020-07-21 17:26:55,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:55,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:26:55,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921388624] [2020-07-21 17:26:55,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:26:55,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:55,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:26:55,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:55,842 INFO L87 Difference]: Start difference. First operand 17768 states and 27178 transitions. Second operand 3 states. [2020-07-21 17:26:57,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:26:57,324 INFO L93 Difference]: Finished difference Result 38828 states and 59623 transitions. [2020-07-21 17:26:57,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:26:57,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 17:26:57,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:26:57,355 INFO L225 Difference]: With dead ends: 38828 [2020-07-21 17:26:57,355 INFO L226 Difference]: Without dead ends: 23709 [2020-07-21 17:26:57,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:26:57,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23709 states. [2020-07-21 17:26:59,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23709 to 20967. [2020-07-21 17:26:59,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20967 states. [2020-07-21 17:26:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 32288 transitions. [2020-07-21 17:26:59,391 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 32288 transitions. Word has length 332 [2020-07-21 17:26:59,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:26:59,392 INFO L479 AbstractCegarLoop]: Abstraction has 20967 states and 32288 transitions. [2020-07-21 17:26:59,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:26:59,392 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 32288 transitions. [2020-07-21 17:26:59,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:26:59,401 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:26:59,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:26:59,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:59,602 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:26:59,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:26:59,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1665463937, now seen corresponding path program 1 times [2020-07-21 17:26:59,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:26:59,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386389266] [2020-07-21 17:26:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:26:59,860 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:26:59,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:26:59,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:26:59,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:26:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:26:59,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:26:59,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386389266] [2020-07-21 17:26:59,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:26:59,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:26:59,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098024618] [2020-07-21 17:26:59,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:26:59,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:26:59,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:26:59,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:26:59,952 INFO L87 Difference]: Start difference. First operand 20967 states and 32288 transitions. Second operand 4 states. [2020-07-21 17:27:01,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:01,242 INFO L93 Difference]: Finished difference Result 30390 states and 46764 transitions. [2020-07-21 17:27:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:27:01,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 17:27:01,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:01,264 INFO L225 Difference]: With dead ends: 30390 [2020-07-21 17:27:01,264 INFO L226 Difference]: Without dead ends: 21004 [2020-07-21 17:27:01,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:27:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21004 states. [2020-07-21 17:27:02,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21004 to 20104. [2020-07-21 17:27:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20104 states. [2020-07-21 17:27:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20104 states to 20104 states and 31017 transitions. [2020-07-21 17:27:02,368 INFO L78 Accepts]: Start accepts. Automaton has 20104 states and 31017 transitions. Word has length 332 [2020-07-21 17:27:02,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:02,369 INFO L479 AbstractCegarLoop]: Abstraction has 20104 states and 31017 transitions. [2020-07-21 17:27:02,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:27:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 20104 states and 31017 transitions. [2020-07-21 17:27:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:27:02,379 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:02,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:02,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:02,586 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:02,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:02,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2025139653, now seen corresponding path program 1 times [2020-07-21 17:27:02,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:02,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461212259] [2020-07-21 17:27:02,588 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:02,836 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:02,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:02,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:02,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:27:02,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:02,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461212259] [2020-07-21 17:27:02,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:02,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:02,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040876903] [2020-07-21 17:27:02,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:02,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:02,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:02,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:02,910 INFO L87 Difference]: Start difference. First operand 20104 states and 31017 transitions. Second operand 3 states. [2020-07-21 17:27:05,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:05,227 INFO L93 Difference]: Finished difference Result 59037 states and 90874 transitions. [2020-07-21 17:27:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:05,228 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 17:27:05,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:05,277 INFO L225 Difference]: With dead ends: 59037 [2020-07-21 17:27:05,277 INFO L226 Difference]: Without dead ends: 39568 [2020-07-21 17:27:05,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:05,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39568 states. [2020-07-21 17:27:06,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39568 to 20191. [2020-07-21 17:27:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20191 states. [2020-07-21 17:27:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 31128 transitions. [2020-07-21 17:27:06,740 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 31128 transitions. Word has length 333 [2020-07-21 17:27:06,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:06,740 INFO L479 AbstractCegarLoop]: Abstraction has 20191 states and 31128 transitions. [2020-07-21 17:27:06,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 31128 transitions. [2020-07-21 17:27:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:27:06,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:06,752 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:06,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:06,966 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:06,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:06,967 INFO L82 PathProgramCache]: Analyzing trace with hash -795670300, now seen corresponding path program 1 times [2020-07-21 17:27:06,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:06,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310151668] [2020-07-21 17:27:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:07,212 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:07,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:07,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 1158 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:27:07,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:27:07,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:07,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310151668] [2020-07-21 17:27:07,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:07,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:27:07,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427078076] [2020-07-21 17:27:07,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:27:07,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:07,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:27:07,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:27:07,337 INFO L87 Difference]: Start difference. First operand 20191 states and 31128 transitions. Second operand 9 states. [2020-07-21 17:27:15,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:15,804 INFO L93 Difference]: Finished difference Result 72114 states and 112791 transitions. [2020-07-21 17:27:15,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 17:27:15,804 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 334 [2020-07-21 17:27:15,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:15,903 INFO L225 Difference]: With dead ends: 72114 [2020-07-21 17:27:15,904 INFO L226 Difference]: Without dead ends: 68444 [2020-07-21 17:27:15,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2020-07-21 17:27:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68444 states. [2020-07-21 17:27:18,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68444 to 38722. [2020-07-21 17:27:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38722 states. [2020-07-21 17:27:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38722 states to 38722 states and 60208 transitions. [2020-07-21 17:27:18,722 INFO L78 Accepts]: Start accepts. Automaton has 38722 states and 60208 transitions. Word has length 334 [2020-07-21 17:27:18,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:18,723 INFO L479 AbstractCegarLoop]: Abstraction has 38722 states and 60208 transitions. [2020-07-21 17:27:18,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:27:18,723 INFO L276 IsEmpty]: Start isEmpty. Operand 38722 states and 60208 transitions. [2020-07-21 17:27:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:27:18,743 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:18,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:18,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:18,958 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:18,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:18,959 INFO L82 PathProgramCache]: Analyzing trace with hash 990941403, now seen corresponding path program 1 times [2020-07-21 17:27:18,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:18,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455029769] [2020-07-21 17:27:18,960 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:19,325 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:27:19,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:19,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 2122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:19,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:19,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:27:19,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:19,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455029769] [2020-07-21 17:27:19,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:19,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:19,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577367910] [2020-07-21 17:27:19,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:19,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:19,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:19,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:19,392 INFO L87 Difference]: Start difference. First operand 38722 states and 60208 transitions. Second operand 3 states. [2020-07-21 17:27:23,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:23,618 INFO L93 Difference]: Finished difference Result 92875 states and 146028 transitions. [2020-07-21 17:27:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:23,619 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 17:27:23,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:23,692 INFO L225 Difference]: With dead ends: 92875 [2020-07-21 17:27:23,693 INFO L226 Difference]: Without dead ends: 56750 [2020-07-21 17:27:23,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56750 states. [2020-07-21 17:27:28,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56750 to 53943. [2020-07-21 17:27:28,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53943 states. [2020-07-21 17:27:28,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53943 states to 53943 states and 84736 transitions. [2020-07-21 17:27:28,869 INFO L78 Accepts]: Start accepts. Automaton has 53943 states and 84736 transitions. Word has length 334 [2020-07-21 17:27:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:28,870 INFO L479 AbstractCegarLoop]: Abstraction has 53943 states and 84736 transitions. [2020-07-21 17:27:28,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 53943 states and 84736 transitions. [2020-07-21 17:27:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:27:28,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:28,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:29,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:29,083 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:29,084 INFO L82 PathProgramCache]: Analyzing trace with hash 432112168, now seen corresponding path program 1 times [2020-07-21 17:27:29,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:29,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784504994] [2020-07-21 17:27:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:29,333 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:29,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:29,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:27:29,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:27:29,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:29,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784504994] [2020-07-21 17:27:29,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:29,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:27:29,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084520972] [2020-07-21 17:27:29,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:27:29,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:29,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:27:29,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:27:29,395 INFO L87 Difference]: Start difference. First operand 53943 states and 84736 transitions. Second operand 4 states. [2020-07-21 17:27:34,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:34,013 INFO L93 Difference]: Finished difference Result 79154 states and 123756 transitions. [2020-07-21 17:27:34,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:27:34,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 17:27:34,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:34,090 INFO L225 Difference]: With dead ends: 79154 [2020-07-21 17:27:34,090 INFO L226 Difference]: Without dead ends: 65623 [2020-07-21 17:27:34,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:27:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65623 states. [2020-07-21 17:27:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65623 to 54215. [2020-07-21 17:27:38,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54215 states. [2020-07-21 17:27:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54215 states to 54215 states and 85183 transitions. [2020-07-21 17:27:38,109 INFO L78 Accepts]: Start accepts. Automaton has 54215 states and 85183 transitions. Word has length 334 [2020-07-21 17:27:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:38,109 INFO L479 AbstractCegarLoop]: Abstraction has 54215 states and 85183 transitions. [2020-07-21 17:27:38,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:27:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 54215 states and 85183 transitions. [2020-07-21 17:27:38,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 17:27:38,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:38,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:38,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:38,323 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:38,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1104040315, now seen corresponding path program 1 times [2020-07-21 17:27:38,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:38,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809381558] [2020-07-21 17:27:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:38,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:38,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:38,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:27:38,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:38,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809381558] [2020-07-21 17:27:38,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:38,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:38,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956352470] [2020-07-21 17:27:38,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:38,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:38,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:38,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:38,635 INFO L87 Difference]: Start difference. First operand 54215 states and 85183 transitions. Second operand 3 states. [2020-07-21 17:27:47,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:47,050 INFO L93 Difference]: Finished difference Result 158927 states and 249370 transitions. [2020-07-21 17:27:47,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:47,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 17:27:47,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:47,196 INFO L225 Difference]: With dead ends: 158927 [2020-07-21 17:27:47,196 INFO L226 Difference]: Without dead ends: 106567 [2020-07-21 17:27:47,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106567 states. [2020-07-21 17:27:51,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106567 to 54297. [2020-07-21 17:27:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54297 states. [2020-07-21 17:27:51,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54297 states to 54297 states and 85298 transitions. [2020-07-21 17:27:51,696 INFO L78 Accepts]: Start accepts. Automaton has 54297 states and 85298 transitions. Word has length 336 [2020-07-21 17:27:51,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:51,696 INFO L479 AbstractCegarLoop]: Abstraction has 54297 states and 85298 transitions. [2020-07-21 17:27:51,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 54297 states and 85298 transitions. [2020-07-21 17:27:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 17:27:51,710 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:51,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:51,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:51,918 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:51,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:51,919 INFO L82 PathProgramCache]: Analyzing trace with hash -75880928, now seen corresponding path program 1 times [2020-07-21 17:27:51,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:51,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274585648] [2020-07-21 17:27:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:52,300 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:27:52,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:52,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 2127 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:27:52,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:27:52,573 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:52,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274585648] [2020-07-21 17:27:52,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:52,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:52,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265027134] [2020-07-21 17:27:52,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:52,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:52,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:52,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:52,574 INFO L87 Difference]: Start difference. First operand 54297 states and 85298 transitions. Second operand 3 states. [2020-07-21 17:28:01,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:01,405 INFO L93 Difference]: Finished difference Result 161181 states and 253047 transitions. [2020-07-21 17:28:01,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:01,406 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 17:28:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:01,559 INFO L225 Difference]: With dead ends: 161181 [2020-07-21 17:28:01,560 INFO L226 Difference]: Without dead ends: 107643 [2020-07-21 17:28:01,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107643 states. [2020-07-21 17:28:06,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107643 to 54365. [2020-07-21 17:28:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54365 states. [2020-07-21 17:28:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54365 states to 54365 states and 85375 transitions. [2020-07-21 17:28:06,492 INFO L78 Accepts]: Start accepts. Automaton has 54365 states and 85375 transitions. Word has length 336 [2020-07-21 17:28:06,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:06,492 INFO L479 AbstractCegarLoop]: Abstraction has 54365 states and 85375 transitions. [2020-07-21 17:28:06,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 54365 states and 85375 transitions. [2020-07-21 17:28:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 17:28:06,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:06,505 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:06,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:06,706 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:06,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:06,706 INFO L82 PathProgramCache]: Analyzing trace with hash -236301095, now seen corresponding path program 1 times [2020-07-21 17:28:06,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:06,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130823054] [2020-07-21 17:28:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:07,070 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:07,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:07,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 2130 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:28:07,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:07,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:07,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130823054] [2020-07-21 17:28:07,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:07,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:28:07,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843927812] [2020-07-21 17:28:07,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:28:07,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:07,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:28:07,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:28:07,306 INFO L87 Difference]: Start difference. First operand 54365 states and 85375 transitions. Second operand 5 states. [2020-07-21 17:28:17,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:17,910 INFO L93 Difference]: Finished difference Result 148846 states and 235396 transitions. [2020-07-21 17:28:17,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:28:17,911 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-07-21 17:28:17,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:18,086 INFO L225 Difference]: With dead ends: 148846 [2020-07-21 17:28:18,086 INFO L226 Difference]: Without dead ends: 106191 [2020-07-21 17:28:18,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:28:18,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106191 states. [2020-07-21 17:28:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106191 to 106189. [2020-07-21 17:28:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106189 states. [2020-07-21 17:28:27,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106189 states to 106189 states and 166579 transitions. [2020-07-21 17:28:27,293 INFO L78 Accepts]: Start accepts. Automaton has 106189 states and 166579 transitions. Word has length 337 [2020-07-21 17:28:27,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:27,294 INFO L479 AbstractCegarLoop]: Abstraction has 106189 states and 166579 transitions. [2020-07-21 17:28:27,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:28:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 106189 states and 166579 transitions. [2020-07-21 17:28:27,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 17:28:27,323 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:27,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:27,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:27,537 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:27,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:27,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1570269791, now seen corresponding path program 1 times [2020-07-21 17:28:27,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:27,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101005359] [2020-07-21 17:28:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:27,782 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:28:27,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:27,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:28:27,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:27,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:27,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101005359] [2020-07-21 17:28:27,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:27,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:27,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085556340] [2020-07-21 17:28:27,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:27,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:27,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:27,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:27,870 INFO L87 Difference]: Start difference. First operand 106189 states and 166579 transitions. Second operand 3 states. [2020-07-21 17:28:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:46,736 INFO L93 Difference]: Finished difference Result 291172 states and 460408 transitions. [2020-07-21 17:28:46,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:46,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 337 [2020-07-21 17:28:46,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:47,037 INFO L225 Difference]: With dead ends: 291172 [2020-07-21 17:28:47,038 INFO L226 Difference]: Without dead ends: 205471 [2020-07-21 17:28:47,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:47,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205471 states. [2020-07-21 17:29:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205471 to 205469. [2020-07-21 17:29:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205469 states. [2020-07-21 17:29:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205469 states to 205469 states and 322540 transitions. [2020-07-21 17:29:08,050 INFO L78 Accepts]: Start accepts. Automaton has 205469 states and 322540 transitions. Word has length 337 [2020-07-21 17:29:08,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:08,050 INFO L479 AbstractCegarLoop]: Abstraction has 205469 states and 322540 transitions. [2020-07-21 17:29:08,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 205469 states and 322540 transitions. [2020-07-21 17:29:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 17:29:08,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:08,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:08,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:08,291 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:08,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1485134142, now seen corresponding path program 1 times [2020-07-21 17:29:08,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:08,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767408304] [2020-07-21 17:29:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:08,671 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:08,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 2131 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:29:08,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:08,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:08,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767408304] [2020-07-21 17:29:08,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:08,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:29:08,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102568968] [2020-07-21 17:29:08,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:29:08,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:08,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:29:08,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:29:08,791 INFO L87 Difference]: Start difference. First operand 205469 states and 322540 transitions. Second operand 4 states. [2020-07-21 17:29:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:51,247 INFO L93 Difference]: Finished difference Result 608744 states and 955501 transitions. [2020-07-21 17:29:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:29:51,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-21 17:29:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:51,994 INFO L225 Difference]: With dead ends: 608744 [2020-07-21 17:29:51,995 INFO L226 Difference]: Without dead ends: 403294 [2020-07-21 17:29:52,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:29:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403294 states. [2020-07-21 17:30:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403294 to 403292. [2020-07-21 17:30:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403292 states. [2020-07-21 17:30:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403292 states to 403292 states and 629853 transitions. [2020-07-21 17:30:35,349 INFO L78 Accepts]: Start accepts. Automaton has 403292 states and 629853 transitions. Word has length 337 [2020-07-21 17:30:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:35,349 INFO L479 AbstractCegarLoop]: Abstraction has 403292 states and 629853 transitions. [2020-07-21 17:30:35,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:30:35,350 INFO L276 IsEmpty]: Start isEmpty. Operand 403292 states and 629853 transitions. [2020-07-21 17:30:35,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 17:30:35,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:35,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:30:35,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:35,629 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:35,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:35,630 INFO L82 PathProgramCache]: Analyzing trace with hash -609480501, now seen corresponding path program 1 times [2020-07-21 17:30:35,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:35,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478738523] [2020-07-21 17:30:35,631 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:35,997 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:30:35,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:36,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 2134 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:30:36,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:36,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:30:36,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:36,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478738523] [2020-07-21 17:30:36,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:36,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:30:36,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709928359] [2020-07-21 17:30:36,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:30:36,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:36,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:30:36,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:30:36,097 INFO L87 Difference]: Start difference. First operand 403292 states and 629853 transitions. Second operand 3 states. [2020-07-21 17:32:00,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:32:00,931 INFO L93 Difference]: Finished difference Result 1192982 states and 1863759 transitions. [2020-07-21 17:32:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:32:00,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 17:32:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:32:02,450 INFO L225 Difference]: With dead ends: 1192982 [2020-07-21 17:32:02,451 INFO L226 Difference]: Without dead ends: 791504 [2020-07-21 17:32:02,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:32:03,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791504 states. [2020-07-21 17:33:36,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791504 to 791502. [2020-07-21 17:33:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 791502 states. [2020-07-21 17:33:39,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791502 states to 791502 states and 1231339 transitions. [2020-07-21 17:33:39,103 INFO L78 Accepts]: Start accepts. Automaton has 791502 states and 1231339 transitions. Word has length 339 [2020-07-21 17:33:39,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:39,103 INFO L479 AbstractCegarLoop]: Abstraction has 791502 states and 1231339 transitions. [2020-07-21 17:33:39,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:33:39,103 INFO L276 IsEmpty]: Start isEmpty. Operand 791502 states and 1231339 transitions. [2020-07-21 17:33:39,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 17:33:39,282 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:39,282 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:39,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:39,483 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:39,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:39,484 INFO L82 PathProgramCache]: Analyzing trace with hash 480339302, now seen corresponding path program 1 times [2020-07-21 17:33:39,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:39,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875726065] [2020-07-21 17:33:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:39,733 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:33:39,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:39,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:33:39,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:39,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:39,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:39,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875726065] [2020-07-21 17:33:39,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:39,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:39,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641587018] [2020-07-21 17:33:39,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:39,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:39,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:39,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:39,791 INFO L87 Difference]: Start difference. First operand 791502 states and 1231339 transitions. Second operand 3 states. [2020-07-21 17:36:44,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:44,799 INFO L93 Difference]: Finished difference Result 2373638 states and 3692599 transitions. [2020-07-21 17:36:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:36:44,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 17:36:44,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:47,630 INFO L225 Difference]: With dead ends: 2373638 [2020-07-21 17:36:47,631 INFO L226 Difference]: Without dead ends: 1582823 [2020-07-21 17:36:48,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582823 states.