/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 DAGSIZE --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.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 21:09:36,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 21:09:36,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 21:09:36,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 21:09:36,805 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 21:09:36,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 21:09:36,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 21:09:36,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 21:09:36,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 21:09:36,811 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 21:09:36,812 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 21:09:36,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 21:09:36,813 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 21:09:36,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 21:09:36,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 21:09:36,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 21:09:36,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 21:09:36,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 21:09:36,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 21:09:36,822 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 21:09:36,823 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 21:09:36,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 21:09:36,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 21:09:36,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 21:09:36,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 21:09:36,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 21:09:36,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 21:09:36,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 21:09:36,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 21:09:36,835 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 21:09:36,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 21:09:36,836 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 21:09:36,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 21:09:36,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 21:09:36,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 21:09:36,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 21:09:36,838 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 21:09:36,853 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 21:09:36,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 21:09:36,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 21:09:36,854 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 21:09:36,855 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 21:09:36,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 21:09:36,855 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 21:09:36,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 21:09:36,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 21:09:36,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 21:09:36,856 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 21:09:36,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 21:09:36,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 21:09:36,856 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 21:09:36,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 21:09:36,857 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 21:09:36,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 21:09:36,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 21:09:36,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 21:09:36,858 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 21:09:36,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 21:09:36,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:09:36,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 21:09:36,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 21:09:36,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 21:09:36,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 21:09:36,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:36,859 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 21:09:36,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 21:09:36,860 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 -> DAGSIZE 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 21:09:37,136 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 21:09:37,149 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 21:09:37,153 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 21:09:37,154 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 21:09:37,154 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 21:09:37,155 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 21:09:37,215 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99b0c8132/de3d0fb02a3e4c9790d99287fa7e0206/FLAG4c0a4e59c [2020-07-21 21:09:37,932 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 21:09:37,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 21:09:37,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99b0c8132/de3d0fb02a3e4c9790d99287fa7e0206/FLAG4c0a4e59c [2020-07-21 21:09:38,052 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99b0c8132/de3d0fb02a3e4c9790d99287fa7e0206 [2020-07-21 21:09:38,060 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 21:09:38,063 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 21:09:38,067 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 21:09:38,068 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 21:09:38,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 21:09:38,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:09:38" (1/1) ... [2020-07-21 21:09:38,075 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dfdeb99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:38, skipping insertion in model container [2020-07-21 21:09:38,075 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:09:38" (1/1) ... [2020-07-21 21:09:38,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 21:09:38,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 21:09:39,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:09:39,967 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 21:09:41,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:09:41,495 INFO L208 MainTranslator]: Completed translation [2020-07-21 21:09:41,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:41 WrapperNode [2020-07-21 21:09:41,496 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 21:09:41,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 21:09:41,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 21:09:41,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 21:09:41,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:41" (1/1) ... [2020-07-21 21:09:41,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:41" (1/1) ... [2020-07-21 21:09:41,596 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:41" (1/1) ... [2020-07-21 21:09:41,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:41" (1/1) ... [2020-07-21 21:09:41,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:41" (1/1) ... [2020-07-21 21:09:41,740 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:41" (1/1) ... [2020-07-21 21:09:41,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:41" (1/1) ... [2020-07-21 21:09:41,788 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 21:09:41,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 21:09:41,791 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 21:09:41,791 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 21:09:41,792 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:41" (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 21:09:41,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 21:09:41,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 21:09:41,881 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 21:09:41,881 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 21:09:41,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 21:09:41,882 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 21:09:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 21:09:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 21:09:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 21:09:41,883 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 21:09:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 21:09:41,884 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 21:09:41,885 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 21:09:41,885 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 21:09:41,885 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 21:09:41,886 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 21:09:41,886 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 21:09:41,886 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 21:09:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 21:09:41,888 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 21:09:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 21:09:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 21:09:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 21:09:46,751 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 21:09:46,753 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 21:09:46,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:09:46 BoogieIcfgContainer [2020-07-21 21:09:46,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 21:09:46,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 21:09:46,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 21:09:46,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 21:09:46,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:09:38" (1/3) ... [2020-07-21 21:09:46,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725d0f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:09:46, skipping insertion in model container [2020-07-21 21:09:46,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:09:41" (2/3) ... [2020-07-21 21:09:46,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725d0f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:09:46, skipping insertion in model container [2020-07-21 21:09:46,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:09:46" (3/3) ... [2020-07-21 21:09:46,781 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 21:09:46,794 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 21:09:46,810 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 21:09:46,826 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 21:09:46,873 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 21:09:46,874 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 21:09:46,874 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 21:09:46,874 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 21:09:46,874 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 21:09:46,874 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 21:09:46,874 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 21:09:46,875 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 21:09:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-07-21 21:09:46,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 21:09:46,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:46,985 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:46,985 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:46,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:46,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-07-21 21:09:47,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:47,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248081246] [2020-07-21 21:09:47,004 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 21:09:47,909 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:09:47,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:47,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 3066 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:09:47,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:48,426 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 21:09:48,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:48,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248081246] [2020-07-21 21:09:48,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:48,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:09:48,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366273004] [2020-07-21 21:09:48,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:09:48,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:48,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:09:48,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:09:48,454 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 4 states. [2020-07-21 21:09:48,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:09:48,909 INFO L93 Difference]: Finished difference Result 4461 states and 8055 transitions. [2020-07-21 21:09:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:09:48,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-21 21:09:48,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:09:48,946 INFO L225 Difference]: With dead ends: 4461 [2020-07-21 21:09:48,946 INFO L226 Difference]: Without dead ends: 2962 [2020-07-21 21:09:48,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 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 21:09:48,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2020-07-21 21:09:49,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2917. [2020-07-21 21:09:49,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2917 states. [2020-07-21 21:09:49,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 4790 transitions. [2020-07-21 21:09:49,216 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 4790 transitions. Word has length 493 [2020-07-21 21:09:49,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:49,221 INFO L479 AbstractCegarLoop]: Abstraction has 2917 states and 4790 transitions. [2020-07-21 21:09:49,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:09:49,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 4790 transitions. [2020-07-21 21:09:49,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 21:09:49,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:49,240 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:49,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:49,455 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:49,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:49,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1745979400, now seen corresponding path program 1 times [2020-07-21 21:09:49,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:49,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143533046] [2020-07-21 21:09:49,457 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 21:09:50,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:09:50,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:50,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 3069 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:09:50,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:50,456 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 21:09:50,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:50,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143533046] [2020-07-21 21:09:50,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:50,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:09:50,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003842516] [2020-07-21 21:09:50,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:09:50,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:50,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:09:50,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:09:50,464 INFO L87 Difference]: Start difference. First operand 2917 states and 4790 transitions. Second operand 3 states. [2020-07-21 21:09:50,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:09:50,846 INFO L93 Difference]: Finished difference Result 8441 states and 13816 transitions. [2020-07-21 21:09:50,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:09:50,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 21:09:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:09:50,879 INFO L225 Difference]: With dead ends: 8441 [2020-07-21 21:09:50,880 INFO L226 Difference]: Without dead ends: 5753 [2020-07-21 21:09:50,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 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 21:09:50,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5753 states. [2020-07-21 21:09:51,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5753 to 5710. [2020-07-21 21:09:51,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5710 states. [2020-07-21 21:09:51,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 9351 transitions. [2020-07-21 21:09:51,130 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 9351 transitions. Word has length 495 [2020-07-21 21:09:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:51,131 INFO L479 AbstractCegarLoop]: Abstraction has 5710 states and 9351 transitions. [2020-07-21 21:09:51,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:09:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 9351 transitions. [2020-07-21 21:09:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 21:09:51,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:51,154 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:51,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:51,370 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:51,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash -2031538529, now seen corresponding path program 1 times [2020-07-21 21:09:51,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:51,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867641441] [2020-07-21 21:09:51,371 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 21:09:52,037 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:09:52,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:52,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:09:52,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:52,268 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 21:09:52,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:52,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867641441] [2020-07-21 21:09:52,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:52,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:09:52,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784547886] [2020-07-21 21:09:52,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:09:52,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:52,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:09:52,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:09:52,272 INFO L87 Difference]: Start difference. First operand 5710 states and 9351 transitions. Second operand 3 states. [2020-07-21 21:09:52,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:09:52,627 INFO L93 Difference]: Finished difference Result 16874 states and 27590 transitions. [2020-07-21 21:09:52,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:09:52,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 21:09:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:09:52,696 INFO L225 Difference]: With dead ends: 16874 [2020-07-21 21:09:52,696 INFO L226 Difference]: Without dead ends: 11195 [2020-07-21 21:09:52,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 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 21:09:52,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11195 states. [2020-07-21 21:09:53,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11195 to 5736. [2020-07-21 21:09:53,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5736 states. [2020-07-21 21:09:53,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5736 states to 5736 states and 9389 transitions. [2020-07-21 21:09:53,068 INFO L78 Accepts]: Start accepts. Automaton has 5736 states and 9389 transitions. Word has length 496 [2020-07-21 21:09:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:53,069 INFO L479 AbstractCegarLoop]: Abstraction has 5736 states and 9389 transitions. [2020-07-21 21:09:53,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:09:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5736 states and 9389 transitions. [2020-07-21 21:09:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 21:09:53,088 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:53,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:53,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:53,304 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:53,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:53,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1933455501, now seen corresponding path program 1 times [2020-07-21 21:09:53,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:53,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521288977] [2020-07-21 21:09:53,307 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 21:09:53,928 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:09:53,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:53,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 3072 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:09:53,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:54,290 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 21:09:54,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:54,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521288977] [2020-07-21 21:09:54,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:54,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:09:54,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283987660] [2020-07-21 21:09:54,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:09:54,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:54,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:09:54,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:09:54,294 INFO L87 Difference]: Start difference. First operand 5736 states and 9389 transitions. Second operand 3 states. [2020-07-21 21:09:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:09:54,727 INFO L93 Difference]: Finished difference Result 16699 states and 27273 transitions. [2020-07-21 21:09:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:09:54,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-21 21:09:54,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:09:54,776 INFO L225 Difference]: With dead ends: 16699 [2020-07-21 21:09:54,777 INFO L226 Difference]: Without dead ends: 11275 [2020-07-21 21:09:54,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 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 21:09:54,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2020-07-21 21:09:55,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 11234. [2020-07-21 21:09:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11234 states. [2020-07-21 21:09:55,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11234 states to 11234 states and 18324 transitions. [2020-07-21 21:09:55,293 INFO L78 Accepts]: Start accepts. Automaton has 11234 states and 18324 transitions. Word has length 497 [2020-07-21 21:09:55,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:55,294 INFO L479 AbstractCegarLoop]: Abstraction has 11234 states and 18324 transitions. [2020-07-21 21:09:55,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:09:55,295 INFO L276 IsEmpty]: Start isEmpty. Operand 11234 states and 18324 transitions. [2020-07-21 21:09:55,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 21:09:55,337 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:55,337 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:55,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:55,551 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:55,551 INFO L82 PathProgramCache]: Analyzing trace with hash -832636568, now seen corresponding path program 1 times [2020-07-21 21:09:55,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:55,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086825825] [2020-07-21 21:09:55,552 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 21:09:56,583 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:09:56,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:56,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:09:56,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:56,715 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 21:09:56,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:56,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086825825] [2020-07-21 21:09:56,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:56,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:09:56,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993558297] [2020-07-21 21:09:56,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:09:56,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:56,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:09:56,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:09:56,718 INFO L87 Difference]: Start difference. First operand 11234 states and 18324 transitions. Second operand 3 states. [2020-07-21 21:09:57,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:09:57,268 INFO L93 Difference]: Finished difference Result 33566 states and 54740 transitions. [2020-07-21 21:09:57,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:09:57,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-21 21:09:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:09:57,328 INFO L225 Difference]: With dead ends: 33566 [2020-07-21 21:09:57,328 INFO L226 Difference]: Without dead ends: 22396 [2020-07-21 21:09:57,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 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 21:09:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22396 states. [2020-07-21 21:09:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22396 to 11310. [2020-07-21 21:09:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11310 states. [2020-07-21 21:09:57,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11310 states to 11310 states and 18430 transitions. [2020-07-21 21:09:57,934 INFO L78 Accepts]: Start accepts. Automaton has 11310 states and 18430 transitions. Word has length 497 [2020-07-21 21:09:57,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:57,935 INFO L479 AbstractCegarLoop]: Abstraction has 11310 states and 18430 transitions. [2020-07-21 21:09:57,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:09:57,935 INFO L276 IsEmpty]: Start isEmpty. Operand 11310 states and 18430 transitions. [2020-07-21 21:09:57,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 21:09:57,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:57,960 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:09:58,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:58,175 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:58,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:58,176 INFO L82 PathProgramCache]: Analyzing trace with hash 128112248, now seen corresponding path program 1 times [2020-07-21 21:09:58,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:58,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463688253] [2020-07-21 21:09:58,177 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 21:09:58,869 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:09:58,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:58,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:09:58,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:59,091 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 21:09:59,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:59,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463688253] [2020-07-21 21:09:59,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:59,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:09:59,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708170811] [2020-07-21 21:09:59,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:09:59,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:59,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:09:59,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:09:59,095 INFO L87 Difference]: Start difference. First operand 11310 states and 18430 transitions. Second operand 3 states. [2020-07-21 21:09:59,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:09:59,680 INFO L93 Difference]: Finished difference Result 33722 states and 54956 transitions. [2020-07-21 21:09:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:09:59,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 21:09:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:09:59,743 INFO L225 Difference]: With dead ends: 33722 [2020-07-21 21:09:59,743 INFO L226 Difference]: Without dead ends: 22488 [2020-07-21 21:09:59,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 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 21:09:59,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22488 states. [2020-07-21 21:10:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22488 to 11402. [2020-07-21 21:10:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11402 states. [2020-07-21 21:10:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11402 states to 11402 states and 18556 transitions. [2020-07-21 21:10:00,366 INFO L78 Accepts]: Start accepts. Automaton has 11402 states and 18556 transitions. Word has length 498 [2020-07-21 21:10:00,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:10:00,367 INFO L479 AbstractCegarLoop]: Abstraction has 11402 states and 18556 transitions. [2020-07-21 21:10:00,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:10:00,367 INFO L276 IsEmpty]: Start isEmpty. Operand 11402 states and 18556 transitions. [2020-07-21 21:10:00,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 21:10:00,414 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:10:00,414 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:00,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:10:00,628 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:10:00,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:10:00,629 INFO L82 PathProgramCache]: Analyzing trace with hash 791346258, now seen corresponding path program 1 times [2020-07-21 21:10:00,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:10:00,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510141640] [2020-07-21 21:10:00,630 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 21:10:01,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:10:01,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:10:01,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1706 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:10:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:10:01,498 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 21:10:01,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:10:01,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510141640] [2020-07-21 21:10:01,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:10:01,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:10:01,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396107168] [2020-07-21 21:10:01,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:10:01,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:10:01,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:10:01,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:10:01,501 INFO L87 Difference]: Start difference. First operand 11402 states and 18556 transitions. Second operand 9 states. [2020-07-21 21:10:12,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:10:12,816 INFO L93 Difference]: Finished difference Result 70231 states and 112807 transitions. [2020-07-21 21:10:12,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 21:10:12,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 499 [2020-07-21 21:10:12,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:10:12,978 INFO L225 Difference]: With dead ends: 70231 [2020-07-21 21:10:12,978 INFO L226 Difference]: Without dead ends: 68201 [2020-07-21 21:10:13,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 493 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 21:10:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68201 states. [2020-07-21 21:10:14,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68201 to 24524. [2020-07-21 21:10:14,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24524 states. [2020-07-21 21:10:14,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24524 states to 24524 states and 39406 transitions. [2020-07-21 21:10:14,235 INFO L78 Accepts]: Start accepts. Automaton has 24524 states and 39406 transitions. Word has length 499 [2020-07-21 21:10:14,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:10:14,236 INFO L479 AbstractCegarLoop]: Abstraction has 24524 states and 39406 transitions. [2020-07-21 21:10:14,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 21:10:14,236 INFO L276 IsEmpty]: Start isEmpty. Operand 24524 states and 39406 transitions. [2020-07-21 21:10:14,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 21:10:14,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:10:14,278 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:14,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:10:14,494 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:10:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:10:14,495 INFO L82 PathProgramCache]: Analyzing trace with hash 736798959, now seen corresponding path program 1 times [2020-07-21 21:10:14,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:10:14,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709354893] [2020-07-21 21:10:14,497 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 21:10:15,866 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:10:15,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:10:15,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 3085 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 21:10:15,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:10:16,181 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 21:10:16,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:10:16,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709354893] [2020-07-21 21:10:16,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:10:16,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 21:10:16,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64757587] [2020-07-21 21:10:16,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 21:10:16,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:10:16,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 21:10:16,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 21:10:16,183 INFO L87 Difference]: Start difference. First operand 24524 states and 39406 transitions. Second operand 8 states. [2020-07-21 21:10:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:10:20,221 INFO L93 Difference]: Finished difference Result 39953 states and 64202 transitions. [2020-07-21 21:10:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 21:10:20,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 499 [2020-07-21 21:10:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:10:20,293 INFO L225 Difference]: With dead ends: 39953 [2020-07-21 21:10:20,294 INFO L226 Difference]: Without dead ends: 28783 [2020-07-21 21:10:20,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 492 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 21:10:20,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28783 states. [2020-07-21 21:10:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28783 to 14706. [2020-07-21 21:10:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14706 states. [2020-07-21 21:10:21,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14706 states to 14706 states and 23616 transitions. [2020-07-21 21:10:21,161 INFO L78 Accepts]: Start accepts. Automaton has 14706 states and 23616 transitions. Word has length 499 [2020-07-21 21:10:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:10:21,162 INFO L479 AbstractCegarLoop]: Abstraction has 14706 states and 23616 transitions. [2020-07-21 21:10:21,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 21:10:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 14706 states and 23616 transitions. [2020-07-21 21:10:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 21:10:21,183 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:10:21,183 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:21,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:10:21,463 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:10:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:10:21,464 INFO L82 PathProgramCache]: Analyzing trace with hash -613863912, now seen corresponding path program 1 times [2020-07-21 21:10:21,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:10:21,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764100025] [2020-07-21 21:10:21,465 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 21:10:22,154 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:10:22,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:10:22,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 3081 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:10:22,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:10:22,341 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 21:10:22,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:10:22,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764100025] [2020-07-21 21:10:22,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:10:22,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:10:22,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273020935] [2020-07-21 21:10:22,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:10:22,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:10:22,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:10:22,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:10:22,347 INFO L87 Difference]: Start difference. First operand 14706 states and 23616 transitions. Second operand 3 states. [2020-07-21 21:10:23,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:10:23,767 INFO L93 Difference]: Finished difference Result 28176 states and 44731 transitions. [2020-07-21 21:10:23,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:10:23,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 21:10:23,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:10:23,803 INFO L225 Difference]: With dead ends: 28176 [2020-07-21 21:10:23,804 INFO L226 Difference]: Without dead ends: 17938 [2020-07-21 21:10:23,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 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 21:10:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17938 states. [2020-07-21 21:10:24,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17938 to 15800. [2020-07-21 21:10:24,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15800 states. [2020-07-21 21:10:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15800 states to 15800 states and 25438 transitions. [2020-07-21 21:10:24,767 INFO L78 Accepts]: Start accepts. Automaton has 15800 states and 25438 transitions. Word has length 499 [2020-07-21 21:10:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:10:24,768 INFO L479 AbstractCegarLoop]: Abstraction has 15800 states and 25438 transitions. [2020-07-21 21:10:24,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:10:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 15800 states and 25438 transitions. [2020-07-21 21:10:24,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 21:10:24,779 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:10:24,780 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:24,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:10:24,986 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:10:24,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:10:24,987 INFO L82 PathProgramCache]: Analyzing trace with hash -637420302, now seen corresponding path program 1 times [2020-07-21 21:10:24,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:10:24,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890040564] [2020-07-21 21:10:24,988 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 21:10:25,682 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:10:25,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:10:25,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:10:25,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:10:25,948 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 21:10:25,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:10:25,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890040564] [2020-07-21 21:10:25,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:10:25,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:10:25,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31298781] [2020-07-21 21:10:25,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:10:25,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:10:25,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:10:25,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:10:25,950 INFO L87 Difference]: Start difference. First operand 15800 states and 25438 transitions. Second operand 3 states. [2020-07-21 21:10:27,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:10:27,521 INFO L93 Difference]: Finished difference Result 45726 states and 73461 transitions. [2020-07-21 21:10:27,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:10:27,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 21:10:27,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:10:27,568 INFO L225 Difference]: With dead ends: 45726 [2020-07-21 21:10:27,569 INFO L226 Difference]: Without dead ends: 30834 [2020-07-21 21:10:27,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 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 21:10:27,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30834 states. [2020-07-21 21:10:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30834 to 30795. [2020-07-21 21:10:29,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30795 states. [2020-07-21 21:10:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30795 states to 30795 states and 49395 transitions. [2020-07-21 21:10:29,213 INFO L78 Accepts]: Start accepts. Automaton has 30795 states and 49395 transitions. Word has length 499 [2020-07-21 21:10:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:10:29,214 INFO L479 AbstractCegarLoop]: Abstraction has 30795 states and 49395 transitions. [2020-07-21 21:10:29,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:10:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 30795 states and 49395 transitions. [2020-07-21 21:10:29,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 21:10:29,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:10:29,236 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:29,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:10:29,451 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:10:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:10:29,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1377693835, now seen corresponding path program 1 times [2020-07-21 21:10:29,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:10:29,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476201895] [2020-07-21 21:10:29,453 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 21:10:29,943 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:10:29,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:10:29,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:10:29,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:10:30,096 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 21:10:30,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:10:30,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476201895] [2020-07-21 21:10:30,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:10:30,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:10:30,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192698957] [2020-07-21 21:10:30,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:10:30,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:10:30,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:10:30,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:10:30,098 INFO L87 Difference]: Start difference. First operand 30795 states and 49395 transitions. Second operand 4 states. [2020-07-21 21:10:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:10:33,450 INFO L93 Difference]: Finished difference Result 87535 states and 139775 transitions. [2020-07-21 21:10:33,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:10:33,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-07-21 21:10:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:10:33,533 INFO L225 Difference]: With dead ends: 87535 [2020-07-21 21:10:33,533 INFO L226 Difference]: Without dead ends: 58943 [2020-07-21 21:10:33,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 496 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 21:10:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58943 states. [2020-07-21 21:10:35,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58943 to 32136. [2020-07-21 21:10:35,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32136 states. [2020-07-21 21:10:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32136 states to 32136 states and 51779 transitions. [2020-07-21 21:10:35,331 INFO L78 Accepts]: Start accepts. Automaton has 32136 states and 51779 transitions. Word has length 499 [2020-07-21 21:10:35,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:10:35,331 INFO L479 AbstractCegarLoop]: Abstraction has 32136 states and 51779 transitions. [2020-07-21 21:10:35,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:10:35,331 INFO L276 IsEmpty]: Start isEmpty. Operand 32136 states and 51779 transitions. [2020-07-21 21:10:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 21:10:35,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:10:35,362 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:35,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:10:35,575 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:10:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:10:35,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1141222616, now seen corresponding path program 1 times [2020-07-21 21:10:35,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:10:35,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98385834] [2020-07-21 21:10:35,577 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 21:10:36,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:10:36,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:10:36,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 3084 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:10:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:10:36,415 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 21:10:36,416 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:10:36,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [98385834] [2020-07-21 21:10:36,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:10:36,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:10:36,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420911481] [2020-07-21 21:10:36,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:10:36,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:10:36,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:10:36,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:10:36,418 INFO L87 Difference]: Start difference. First operand 32136 states and 51779 transitions. Second operand 3 states. [2020-07-21 21:10:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:10:39,295 INFO L93 Difference]: Finished difference Result 68318 states and 109028 transitions. [2020-07-21 21:10:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:10:39,296 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 21:10:39,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:10:39,356 INFO L225 Difference]: With dead ends: 68318 [2020-07-21 21:10:39,356 INFO L226 Difference]: Without dead ends: 46390 [2020-07-21 21:10:39,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 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 21:10:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46390 states. [2020-07-21 21:10:42,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46390 to 39972. [2020-07-21 21:10:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39972 states. [2020-07-21 21:10:42,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39972 states to 39972 states and 64431 transitions. [2020-07-21 21:10:42,575 INFO L78 Accepts]: Start accepts. Automaton has 39972 states and 64431 transitions. Word has length 501 [2020-07-21 21:10:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:10:42,576 INFO L479 AbstractCegarLoop]: Abstraction has 39972 states and 64431 transitions. [2020-07-21 21:10:42,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:10:42,576 INFO L276 IsEmpty]: Start isEmpty. Operand 39972 states and 64431 transitions. [2020-07-21 21:10:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 21:10:42,598 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:10:42,598 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:42,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:10:42,799 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:10:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:10:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1752769653, now seen corresponding path program 1 times [2020-07-21 21:10:42,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:10:42,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085204665] [2020-07-21 21:10:42,802 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 21:10:43,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:10:43,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:10:43,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 3091 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:10:43,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:10:43,701 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 21:10:43,702 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:10:43,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085204665] [2020-07-21 21:10:43,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:10:43,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:10:43,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506635504] [2020-07-21 21:10:43,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:10:43,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:10:43,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:10:43,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:10:43,704 INFO L87 Difference]: Start difference. First operand 39972 states and 64431 transitions. Second operand 4 states. [2020-07-21 21:10:48,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:10:48,373 INFO L93 Difference]: Finished difference Result 117190 states and 188687 transitions. [2020-07-21 21:10:48,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:10:48,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-21 21:10:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:10:48,467 INFO L225 Difference]: With dead ends: 117190 [2020-07-21 21:10:48,467 INFO L226 Difference]: Without dead ends: 78300 [2020-07-21 21:10:48,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 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 21:10:48,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78300 states. [2020-07-21 21:10:54,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78300 to 77960. [2020-07-21 21:10:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77960 states. [2020-07-21 21:10:54,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77960 states to 77960 states and 125161 transitions. [2020-07-21 21:10:54,353 INFO L78 Accepts]: Start accepts. Automaton has 77960 states and 125161 transitions. Word has length 502 [2020-07-21 21:10:54,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:10:54,353 INFO L479 AbstractCegarLoop]: Abstraction has 77960 states and 125161 transitions. [2020-07-21 21:10:54,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:10:54,354 INFO L276 IsEmpty]: Start isEmpty. Operand 77960 states and 125161 transitions. [2020-07-21 21:10:54,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 21:10:54,659 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:10:54,659 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:10:54,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:10:54,860 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:10:54,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:10:54,861 INFO L82 PathProgramCache]: Analyzing trace with hash -670901697, now seen corresponding path program 1 times [2020-07-21 21:10:54,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:10:54,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128477480] [2020-07-21 21:10:54,862 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 21:10:55,342 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:10:55,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:10:55,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:10:55,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:10:55,451 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 21:10:55,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:10:55,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128477480] [2020-07-21 21:10:55,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:10:55,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:10:55,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008482950] [2020-07-21 21:10:55,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:10:55,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:10:55,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:10:55,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:10:55,454 INFO L87 Difference]: Start difference. First operand 77960 states and 125161 transitions. Second operand 3 states. [2020-07-21 21:11:05,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:11:05,456 INFO L93 Difference]: Finished difference Result 221507 states and 353167 transitions. [2020-07-21 21:11:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:11:05,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-21 21:11:05,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:11:05,662 INFO L225 Difference]: With dead ends: 221507 [2020-07-21 21:11:05,662 INFO L226 Difference]: Without dead ends: 149748 [2020-07-21 21:11:05,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 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 21:11:05,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149748 states. [2020-07-21 21:11:10,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149748 to 78904. [2020-07-21 21:11:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78904 states. [2020-07-21 21:11:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78904 states to 78904 states and 126556 transitions. [2020-07-21 21:11:10,878 INFO L78 Accepts]: Start accepts. Automaton has 78904 states and 126556 transitions. Word has length 504 [2020-07-21 21:11:10,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:11:10,879 INFO L479 AbstractCegarLoop]: Abstraction has 78904 states and 126556 transitions. [2020-07-21 21:11:10,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:11:10,879 INFO L276 IsEmpty]: Start isEmpty. Operand 78904 states and 126556 transitions. [2020-07-21 21:11:10,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 21:11:10,917 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:11:10,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:11,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:11:11,246 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:11:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:11:11,247 INFO L82 PathProgramCache]: Analyzing trace with hash 85192014, now seen corresponding path program 1 times [2020-07-21 21:11:11,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:11:11,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710532182] [2020-07-21 21:11:11,247 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 21:11:11,908 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:11:11,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:11:11,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 3094 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:11:11,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:11:12,116 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 21:11:12,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:11:12,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710532182] [2020-07-21 21:11:12,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:11:12,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:11:12,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915175361] [2020-07-21 21:11:12,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:11:12,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:11:12,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:11:12,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:11:12,118 INFO L87 Difference]: Start difference. First operand 78904 states and 126556 transitions. Second operand 3 states. [2020-07-21 21:11:22,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:11:22,891 INFO L93 Difference]: Finished difference Result 228809 states and 365933 transitions. [2020-07-21 21:11:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:11:22,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-21 21:11:22,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:11:23,137 INFO L225 Difference]: With dead ends: 228809 [2020-07-21 21:11:23,137 INFO L226 Difference]: Without dead ends: 153797 [2020-07-21 21:11:23,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 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 21:11:23,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153797 states. [2020-07-21 21:11:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153797 to 153505. [2020-07-21 21:11:33,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153505 states. [2020-07-21 21:11:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153505 states to 153505 states and 245163 transitions. [2020-07-21 21:11:33,389 INFO L78 Accepts]: Start accepts. Automaton has 153505 states and 245163 transitions. Word has length 504 [2020-07-21 21:11:33,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:11:33,389 INFO L479 AbstractCegarLoop]: Abstraction has 153505 states and 245163 transitions. [2020-07-21 21:11:33,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:11:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 153505 states and 245163 transitions. [2020-07-21 21:11:33,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 21:11:33,516 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:11:33,516 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:11:33,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:11:33,717 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:11:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:11:33,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1041395266, now seen corresponding path program 1 times [2020-07-21 21:11:33,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:11:33,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090641330] [2020-07-21 21:11:33,719 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 21:11:34,407 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:11:34,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:11:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:11:34,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:11:34,529 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 21:11:34,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:11:34,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090641330] [2020-07-21 21:11:34,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:11:34,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:11:34,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489396942] [2020-07-21 21:11:34,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:11:34,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:11:34,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:11:34,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:11:34,532 INFO L87 Difference]: Start difference. First operand 153505 states and 245163 transitions. Second operand 3 states. [2020-07-21 21:11:52,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:11:52,012 INFO L93 Difference]: Finished difference Result 331942 states and 527545 transitions. [2020-07-21 21:11:52,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:11:52,013 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 505 [2020-07-21 21:11:52,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:11:52,319 INFO L225 Difference]: With dead ends: 331942 [2020-07-21 21:11:52,319 INFO L226 Difference]: Without dead ends: 239729 [2020-07-21 21:11:52,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 503 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 21:11:52,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239729 states. [2020-07-21 21:12:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239729 to 152009. [2020-07-21 21:12:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152009 states. [2020-07-21 21:12:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152009 states to 152009 states and 242502 transitions. [2020-07-21 21:12:07,712 INFO L78 Accepts]: Start accepts. Automaton has 152009 states and 242502 transitions. Word has length 505 [2020-07-21 21:12:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:12:07,712 INFO L479 AbstractCegarLoop]: Abstraction has 152009 states and 242502 transitions. [2020-07-21 21:12:07,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:12:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 152009 states and 242502 transitions. [2020-07-21 21:12:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 21:12:07,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:12:07,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:12:07,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:12:07,996 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:12:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:12:07,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1072854143, now seen corresponding path program 1 times [2020-07-21 21:12:07,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:12:07,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133519081] [2020-07-21 21:12:07,998 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 21:12:08,489 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:12:08,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:12:08,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 1705 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:12:08,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:12:08,726 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 21:12:08,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:12:08,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133519081] [2020-07-21 21:12:08,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:12:08,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:12:08,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121947974] [2020-07-21 21:12:08,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:12:08,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:12:08,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:12:08,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:12:08,728 INFO L87 Difference]: Start difference. First operand 152009 states and 242502 transitions. Second operand 9 states. [2020-07-21 21:13:12,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:12,017 INFO L93 Difference]: Finished difference Result 691416 states and 1108502 transitions. [2020-07-21 21:13:12,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 21:13:12,018 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 505 [2020-07-21 21:13:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:13,039 INFO L225 Difference]: With dead ends: 691416 [2020-07-21 21:13:13,039 INFO L226 Difference]: Without dead ends: 646796 [2020-07-21 21:13:13,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 21:13:13,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646796 states. [2020-07-21 21:13:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646796 to 272779. [2020-07-21 21:13:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272779 states. [2020-07-21 21:13:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272779 states to 272779 states and 434812 transitions. [2020-07-21 21:13:44,096 INFO L78 Accepts]: Start accepts. Automaton has 272779 states and 434812 transitions. Word has length 505 [2020-07-21 21:13:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:44,097 INFO L479 AbstractCegarLoop]: Abstraction has 272779 states and 434812 transitions. [2020-07-21 21:13:44,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 21:13:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 272779 states and 434812 transitions. [2020-07-21 21:13:44,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 21:13:44,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:44,217 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:44,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:44,418 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:44,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:44,419 INFO L82 PathProgramCache]: Analyzing trace with hash 850887447, now seen corresponding path program 1 times [2020-07-21 21:13:44,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:44,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839266652] [2020-07-21 21:13:44,420 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 21:13:45,124 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:13:45,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:45,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 3095 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 21:13:45,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:45,443 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 21:13:45,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:45,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839266652] [2020-07-21 21:13:45,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:45,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 21:13:45,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728642533] [2020-07-21 21:13:45,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 21:13:45,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:45,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 21:13:45,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 21:13:45,445 INFO L87 Difference]: Start difference. First operand 272779 states and 434812 transitions. Second operand 8 states. [2020-07-21 21:14:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:32,004 INFO L93 Difference]: Finished difference Result 541788 states and 867614 transitions. [2020-07-21 21:14:32,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 21:14:32,005 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 505 [2020-07-21 21:14:32,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:32,599 INFO L225 Difference]: With dead ends: 541788 [2020-07-21 21:14:32,599 INFO L226 Difference]: Without dead ends: 449934 [2020-07-21 21:14:32,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 498 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 21:14:33,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449934 states. [2020-07-21 21:14:57,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449934 to 185155. [2020-07-21 21:14:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185155 states. [2020-07-21 21:14:57,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185155 states to 185155 states and 295012 transitions. [2020-07-21 21:14:57,766 INFO L78 Accepts]: Start accepts. Automaton has 185155 states and 295012 transitions. Word has length 505 [2020-07-21 21:14:57,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:14:57,766 INFO L479 AbstractCegarLoop]: Abstraction has 185155 states and 295012 transitions. [2020-07-21 21:14:57,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 21:14:57,766 INFO L276 IsEmpty]: Start isEmpty. Operand 185155 states and 295012 transitions. [2020-07-21 21:14:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 21:14:57,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:14:57,857 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:14:58,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:58,070 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:14:58,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:14:58,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1322150038, now seen corresponding path program 1 times [2020-07-21 21:14:58,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:14:58,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196290261] [2020-07-21 21:14:58,072 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 21:14:58,765 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:14:58,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:14:58,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 3091 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:14:58,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:14:58,971 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 21:14:58,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:14:58,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196290261] [2020-07-21 21:14:58,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:14:58,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:14:58,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838494927] [2020-07-21 21:14:58,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:14:58,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:14:58,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:14:58,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:58,973 INFO L87 Difference]: Start difference. First operand 185155 states and 295012 transitions. Second operand 3 states. [2020-07-21 21:15:33,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:15:33,573 INFO L93 Difference]: Finished difference Result 549754 states and 875284 transitions. [2020-07-21 21:15:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:15:33,573 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 505 [2020-07-21 21:15:33,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:15:34,037 INFO L225 Difference]: With dead ends: 549754 [2020-07-21 21:15:34,037 INFO L226 Difference]: Without dead ends: 366256 [2020-07-21 21:15:34,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 503 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 21:15:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366256 states. [2020-07-21 21:16:12,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366256 to 365910. [2020-07-21 21:16:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365910 states. [2020-07-21 21:16:13,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365910 states to 365910 states and 580770 transitions. [2020-07-21 21:16:13,054 INFO L78 Accepts]: Start accepts. Automaton has 365910 states and 580770 transitions. Word has length 505 [2020-07-21 21:16:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:16:13,055 INFO L479 AbstractCegarLoop]: Abstraction has 365910 states and 580770 transitions. [2020-07-21 21:16:13,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:16:13,055 INFO L276 IsEmpty]: Start isEmpty. Operand 365910 states and 580770 transitions. [2020-07-21 21:16:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 21:16:13,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:16:13,231 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:16:13,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:16:13,438 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:16:13,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:16:13,439 INFO L82 PathProgramCache]: Analyzing trace with hash 940868997, now seen corresponding path program 1 times [2020-07-21 21:16:13,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:16:13,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661346516] [2020-07-21 21:16:13,440 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 21:16:14,150 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:16:14,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:16:14,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 3094 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:16:14,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:16:14,281 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 21:16:14,281 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:16:14,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661346516] [2020-07-21 21:16:14,282 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:16:14,282 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:16:14,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557734715] [2020-07-21 21:16:14,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:16:14,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:16:14,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:16:14,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:16:14,283 INFO L87 Difference]: Start difference. First operand 365910 states and 580770 transitions. Second operand 3 states. [2020-07-21 21:17:08,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:17:08,596 INFO L93 Difference]: Finished difference Result 799608 states and 1266719 transitions. [2020-07-21 21:17:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:17:08,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-21 21:17:08,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:17:09,315 INFO L225 Difference]: With dead ends: 799608 [2020-07-21 21:17:09,316 INFO L226 Difference]: Without dead ends: 513546 [2020-07-21 21:17:09,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 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 21:17:09,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513546 states. [2020-07-21 21:18:02,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513546 to 475894. [2020-07-21 21:18:02,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475894 states. [2020-07-21 21:18:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475894 states to 475894 states and 757314 transitions. [2020-07-21 21:18:03,423 INFO L78 Accepts]: Start accepts. Automaton has 475894 states and 757314 transitions. Word has length 507 [2020-07-21 21:18:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:18:03,424 INFO L479 AbstractCegarLoop]: Abstraction has 475894 states and 757314 transitions. [2020-07-21 21:18:03,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:18:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 475894 states and 757314 transitions. [2020-07-21 21:18:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 21:18:03,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:18:03,588 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:18:03,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:18:03,793 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:18:03,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:18:03,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1026073579, now seen corresponding path program 1 times [2020-07-21 21:18:03,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:18:03,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382336205] [2020-07-21 21:18:03,795 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 21:18:04,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:18:04,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:18:04,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:18:04,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:18:04,409 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 21:18:04,409 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:18:04,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382336205] [2020-07-21 21:18:04,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:18:04,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:18:04,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689932963] [2020-07-21 21:18:04,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:18:04,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:18:04,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:18:04,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:18:04,411 INFO L87 Difference]: Start difference. First operand 475894 states and 757314 transitions. Second operand 4 states. [2020-07-21 21:19:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:19:48,782 INFO L93 Difference]: Finished difference Result 1347722 states and 2134045 transitions. [2020-07-21 21:19:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:19:48,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2020-07-21 21:19:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:19:50,061 INFO L225 Difference]: With dead ends: 1347722 [2020-07-21 21:19:50,061 INFO L226 Difference]: Without dead ends: 913148 [2020-07-21 21:19:50,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 504 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 21:19:51,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913148 states. [2020-07-21 21:20:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913148 to 498218. [2020-07-21 21:20:51,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 498218 states. [2020-07-21 21:20:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498218 states to 498218 states and 796518 transitions. [2020-07-21 21:20:52,335 INFO L78 Accepts]: Start accepts. Automaton has 498218 states and 796518 transitions. Word has length 507 [2020-07-21 21:20:52,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:20:52,335 INFO L479 AbstractCegarLoop]: Abstraction has 498218 states and 796518 transitions. [2020-07-21 21:20:52,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:20:52,336 INFO L276 IsEmpty]: Start isEmpty. Operand 498218 states and 796518 transitions. [2020-07-21 21:20:52,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 21:20:52,544 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:20:52,544 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:20:52,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:20:52,745 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:20:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:20:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash 972325860, now seen corresponding path program 1 times [2020-07-21 21:20:52,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:20:52,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865519287] [2020-07-21 21:20:52,747 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 21:20:54,196 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:20:54,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:20:54,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 3100 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:20:54,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:20:54,405 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 21:20:54,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:20:54,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865519287] [2020-07-21 21:20:54,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:20:54,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:20:54,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885358852] [2020-07-21 21:20:54,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:20:54,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:20:54,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:20:54,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:20:54,407 INFO L87 Difference]: Start difference. First operand 498218 states and 796518 transitions. Second operand 3 states.