/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 [2020-07-20 15:11:31,560 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 15:11:31,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 15:11:31,581 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 15:11:31,581 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 15:11:31,583 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 15:11:31,585 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 15:11:31,597 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 15:11:31,599 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 15:11:31,601 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 15:11:31,602 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 15:11:31,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 15:11:31,604 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 15:11:31,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 15:11:31,609 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 15:11:31,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 15:11:31,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 15:11:31,613 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 15:11:31,615 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 15:11:31,621 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 15:11:31,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 15:11:31,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 15:11:31,627 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 15:11:31,628 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 15:11:31,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 15:11:31,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 15:11:31,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 15:11:31,647 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 15:11:31,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 15:11:31,673 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 15:11:31,673 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 15:11:31,675 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 15:11:31,676 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 15:11:31,676 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 15:11:31,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 15:11:31,676 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 15:11:31,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 15:11:31,677 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 15:11:31,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 15:11:31,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 15:11:31,678 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 15:11:31,678 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 15:11:31,679 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 15:11:31,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 15:11:31,679 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 15:11:31,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 15:11:31,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 15:11:31,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 15:11:31,680 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 15:11:31,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 15:11:31,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:11:31,681 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 15:11:31,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 15:11:31,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 15:11:31,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 15:11:31,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:11:31,682 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 15:11:31,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 15:11:31,682 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 -> 4 [2020-07-20 15:11:31,938 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 15:11:31,951 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 15:11:31,954 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 15:11:31,955 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 15:11:31,955 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 15:11:31,956 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 15:11:32,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/216fa0ef2/15bf8d1829d34b33bfc8b000496971a0/FLAGe50b61213 [2020-07-20 15:11:32,722 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 15:11:32,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 15:11:32,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/216fa0ef2/15bf8d1829d34b33bfc8b000496971a0/FLAGe50b61213 [2020-07-20 15:11:32,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/216fa0ef2/15bf8d1829d34b33bfc8b000496971a0 [2020-07-20 15:11:32,841 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 15:11:32,845 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 15:11:32,846 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 15:11:32,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 15:11:32,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 15:11:32,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:11:32" (1/1) ... [2020-07-20 15:11:32,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d780c6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:11:32, skipping insertion in model container [2020-07-20 15:11:32,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:11:32" (1/1) ... [2020-07-20 15:11:32,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 15:11:33,067 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 15:11:34,639 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:11:34,653 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 15:11:35,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:11:35,816 INFO L208 MainTranslator]: Completed translation [2020-07-20 15:11:35,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:11:35 WrapperNode [2020-07-20 15:11:35,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 15:11:35,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 15:11:35,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 15:11:35,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 15:11:35,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:11:35" (1/1) ... [2020-07-20 15:11:35,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:11:35" (1/1) ... [2020-07-20 15:11:35,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:11:35" (1/1) ... [2020-07-20 15:11:35,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:11:35" (1/1) ... [2020-07-20 15:11:35,961 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:11:35" (1/1) ... [2020-07-20 15:11:36,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:11:35" (1/1) ... [2020-07-20 15:11:36,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:11:35" (1/1) ... [2020-07-20 15:11:36,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 15:11:36,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 15:11:36,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 15:11:36,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 15:11:36,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:11:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:11:36,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 15:11:36,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 15:11:36,105 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 15:11:36,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 15:11:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 15:11:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 15:11:36,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 15:11:36,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 15:11:36,107 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 15:11:36,107 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 15:11:36,107 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 15:11:36,108 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 15:11:36,108 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 15:11:36,108 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 15:11:36,108 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 15:11:36,108 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 15:11:36,109 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 15:11:36,109 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 15:11:36,109 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 15:11:36,109 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 15:11:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 15:11:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 15:11:36,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 15:11:40,299 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 15:11:40,299 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 15:11:40,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:11:40 BoogieIcfgContainer [2020-07-20 15:11:40,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 15:11:40,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 15:11:40,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 15:11:40,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 15:11:40,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:11:32" (1/3) ... [2020-07-20 15:11:40,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eaeb5ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:11:40, skipping insertion in model container [2020-07-20 15:11:40,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:11:35" (2/3) ... [2020-07-20 15:11:40,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eaeb5ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:11:40, skipping insertion in model container [2020-07-20 15:11:40,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:11:40" (3/3) ... [2020-07-20 15:11:40,321 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 15:11:40,331 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 15:11:40,340 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 15:11:40,353 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 15:11:40,383 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 15:11:40,383 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 15:11:40,383 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 15:11:40,383 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 15:11:40,383 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 15:11:40,383 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 15:11:40,384 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 15:11:40,384 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 15:11:40,424 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-07-20 15:11:40,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 15:11:40,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:11:40,479 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] [2020-07-20 15:11:40,479 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:11:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:11:40,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-07-20 15:11:40,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:11:40,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751274573] [2020-07-20 15:11:40,496 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:11:41,146 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:11:41,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:11:41,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1895 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:11:41,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:11:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:11:41,666 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:11:41,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751274573] [2020-07-20 15:11:41,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:11:41,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:11:41,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077380806] [2020-07-20 15:11:41,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:11:41,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:11:41,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:11:41,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:11:41,693 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 4 states. [2020-07-20 15:11:42,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:11:42,155 INFO L93 Difference]: Finished difference Result 4461 states and 8055 transitions. [2020-07-20 15:11:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:11:42,157 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-20 15:11:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:11:42,191 INFO L225 Difference]: With dead ends: 4461 [2020-07-20 15:11:42,192 INFO L226 Difference]: Without dead ends: 2962 [2020-07-20 15:11:42,203 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 [2020-07-20 15:11:42,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2020-07-20 15:11:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2917. [2020-07-20 15:11:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2917 states. [2020-07-20 15:11:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2917 states to 2917 states and 4790 transitions. [2020-07-20 15:11:42,418 INFO L78 Accepts]: Start accepts. Automaton has 2917 states and 4790 transitions. Word has length 493 [2020-07-20 15:11:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:11:42,423 INFO L479 AbstractCegarLoop]: Abstraction has 2917 states and 4790 transitions. [2020-07-20 15:11:42,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:11:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2917 states and 4790 transitions. [2020-07-20 15:11:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-20 15:11:42,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:11:42,442 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] [2020-07-20 15:11:42,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:11:42,656 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:11:42,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:11:42,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1745979400, now seen corresponding path program 1 times [2020-07-20 15:11:42,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:11:42,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197383890] [2020-07-20 15:11:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:11:43,130 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:11:43,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:11:43,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:11:43,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:11:43,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:11:43,413 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:11:43,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197383890] [2020-07-20 15:11:43,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:11:43,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:11:43,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231669434] [2020-07-20 15:11:43,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:11:43,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:11:43,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:11:43,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:11:43,418 INFO L87 Difference]: Start difference. First operand 2917 states and 4790 transitions. Second operand 3 states. [2020-07-20 15:11:43,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:11:43,815 INFO L93 Difference]: Finished difference Result 8441 states and 13816 transitions. [2020-07-20 15:11:43,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:11:43,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-20 15:11:43,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:11:43,855 INFO L225 Difference]: With dead ends: 8441 [2020-07-20 15:11:43,855 INFO L226 Difference]: Without dead ends: 5753 [2020-07-20 15:11:43,864 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 [2020-07-20 15:11:43,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5753 states. [2020-07-20 15:11:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5753 to 5710. [2020-07-20 15:11:44,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5710 states. [2020-07-20 15:11:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 9351 transitions. [2020-07-20 15:11:44,101 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 9351 transitions. Word has length 495 [2020-07-20 15:11:44,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:11:44,102 INFO L479 AbstractCegarLoop]: Abstraction has 5710 states and 9351 transitions. [2020-07-20 15:11:44,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:11:44,102 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 9351 transitions. [2020-07-20 15:11:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 15:11:44,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:11:44,124 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] [2020-07-20 15:11:44,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:11:44,340 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:11:44,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:11:44,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2031538529, now seen corresponding path program 1 times [2020-07-20 15:11:44,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:11:44,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242462287] [2020-07-20 15:11:44,344 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:11:44,991 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:11:44,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:11:45,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:11:45,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:11:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:11:45,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:11:45,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242462287] [2020-07-20 15:11:45,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:11:45,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:11:45,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678922144] [2020-07-20 15:11:45,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:11:45,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:11:45,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:11:45,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:11:45,388 INFO L87 Difference]: Start difference. First operand 5710 states and 9351 transitions. Second operand 3 states. [2020-07-20 15:11:45,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:11:45,801 INFO L93 Difference]: Finished difference Result 16874 states and 27590 transitions. [2020-07-20 15:11:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:11:45,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-20 15:11:45,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:11:45,873 INFO L225 Difference]: With dead ends: 16874 [2020-07-20 15:11:45,874 INFO L226 Difference]: Without dead ends: 11195 [2020-07-20 15:11:45,892 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 [2020-07-20 15:11:45,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11195 states. [2020-07-20 15:11:46,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11195 to 5736. [2020-07-20 15:11:46,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5736 states. [2020-07-20 15:11:46,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5736 states to 5736 states and 9389 transitions. [2020-07-20 15:11:46,279 INFO L78 Accepts]: Start accepts. Automaton has 5736 states and 9389 transitions. Word has length 496 [2020-07-20 15:11:46,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:11:46,279 INFO L479 AbstractCegarLoop]: Abstraction has 5736 states and 9389 transitions. [2020-07-20 15:11:46,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:11:46,279 INFO L276 IsEmpty]: Start isEmpty. Operand 5736 states and 9389 transitions. [2020-07-20 15:11:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 15:11:46,302 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:11:46,302 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] [2020-07-20 15:11:46,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:11:46,517 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:11:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:11:46,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1933455501, now seen corresponding path program 1 times [2020-07-20 15:11:46,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:11:46,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424505472] [2020-07-20 15:11:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:11:47,139 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:11:47,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:11:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 1680 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:11:47,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:11:47,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:11:47,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:11:47,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424505472] [2020-07-20 15:11:47,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:11:47,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:11:47,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794151747] [2020-07-20 15:11:47,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:11:47,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:11:47,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:11:47,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:11:47,452 INFO L87 Difference]: Start difference. First operand 5736 states and 9389 transitions. Second operand 4 states. [2020-07-20 15:11:48,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:11:48,086 INFO L93 Difference]: Finished difference Result 13543 states and 22348 transitions. [2020-07-20 15:11:48,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:11:48,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-07-20 15:11:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:11:48,136 INFO L225 Difference]: With dead ends: 13543 [2020-07-20 15:11:48,136 INFO L226 Difference]: Without dead ends: 6868 [2020-07-20 15:11:48,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:11:48,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6868 states. [2020-07-20 15:11:48,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6868 to 6825. [2020-07-20 15:11:48,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6825 states. [2020-07-20 15:11:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6825 states to 6825 states and 11231 transitions. [2020-07-20 15:11:48,530 INFO L78 Accepts]: Start accepts. Automaton has 6825 states and 11231 transitions. Word has length 497 [2020-07-20 15:11:48,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:11:48,531 INFO L479 AbstractCegarLoop]: Abstraction has 6825 states and 11231 transitions. [2020-07-20 15:11:48,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:11:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 6825 states and 11231 transitions. [2020-07-20 15:11:48,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 15:11:48,552 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:11:48,553 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] [2020-07-20 15:11:48,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:11:48,767 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:11:48,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:11:48,769 INFO L82 PathProgramCache]: Analyzing trace with hash 791346258, now seen corresponding path program 1 times [2020-07-20 15:11:48,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:11:48,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964932802] [2020-07-20 15:11:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:11:49,762 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:11:49,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:11:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1486 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:11:49,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:11:50,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:11:50,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:11:50,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964932802] [2020-07-20 15:11:50,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:11:50,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 15:11:50,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049780881] [2020-07-20 15:11:50,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 15:11:50,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:11:50,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 15:11:50,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 15:11:50,010 INFO L87 Difference]: Start difference. First operand 6825 states and 11231 transitions. Second operand 9 states. [2020-07-20 15:11:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:11:58,739 INFO L93 Difference]: Finished difference Result 32838 states and 52782 transitions. [2020-07-20 15:11:58,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 15:11:58,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 499 [2020-07-20 15:11:58,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:11:58,809 INFO L225 Difference]: With dead ends: 32838 [2020-07-20 15:11:58,812 INFO L226 Difference]: Without dead ends: 31789 [2020-07-20 15:11:58,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 15:11:58,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31789 states. [2020-07-20 15:11:59,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31789 to 13499. [2020-07-20 15:11:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13499 states. [2020-07-20 15:11:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13499 states to 13499 states and 21840 transitions. [2020-07-20 15:11:59,621 INFO L78 Accepts]: Start accepts. Automaton has 13499 states and 21840 transitions. Word has length 499 [2020-07-20 15:11:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:11:59,622 INFO L479 AbstractCegarLoop]: Abstraction has 13499 states and 21840 transitions. [2020-07-20 15:11:59,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 15:11:59,622 INFO L276 IsEmpty]: Start isEmpty. Operand 13499 states and 21840 transitions. [2020-07-20 15:11:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 15:11:59,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:11:59,651 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] [2020-07-20 15:11:59,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:11:59,864 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:11:59,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:11:59,865 INFO L82 PathProgramCache]: Analyzing trace with hash 736798959, now seen corresponding path program 1 times [2020-07-20 15:11:59,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:11:59,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69401933] [2020-07-20 15:11:59,866 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:12:00,280 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:12:00,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:00,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 1909 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:00,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:00,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:00,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69401933] [2020-07-20 15:12:00,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:00,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:00,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729658629] [2020-07-20 15:12:00,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:00,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:00,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:00,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:00,602 INFO L87 Difference]: Start difference. First operand 13499 states and 21840 transitions. Second operand 3 states. [2020-07-20 15:12:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:01,559 INFO L93 Difference]: Finished difference Result 28875 states and 46343 transitions. [2020-07-20 15:12:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:01,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 15:12:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:01,604 INFO L225 Difference]: With dead ends: 28875 [2020-07-20 15:12:01,604 INFO L226 Difference]: Without dead ends: 18614 [2020-07-20 15:12:01,633 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 [2020-07-20 15:12:01,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18614 states. [2020-07-20 15:12:02,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18614 to 15798. [2020-07-20 15:12:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15798 states. [2020-07-20 15:12:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15798 states to 15798 states and 25636 transitions. [2020-07-20 15:12:02,450 INFO L78 Accepts]: Start accepts. Automaton has 15798 states and 25636 transitions. Word has length 499 [2020-07-20 15:12:02,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:02,450 INFO L479 AbstractCegarLoop]: Abstraction has 15798 states and 25636 transitions. [2020-07-20 15:12:02,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 15798 states and 25636 transitions. [2020-07-20 15:12:02,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 15:12:02,472 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:02,473 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] [2020-07-20 15:12:02,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:02,687 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:02,688 INFO L82 PathProgramCache]: Analyzing trace with hash -160987480, now seen corresponding path program 1 times [2020-07-20 15:12:02,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:02,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675125388] [2020-07-20 15:12:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:12:03,088 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:12:03,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:03,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:03,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:03,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:03,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:03,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675125388] [2020-07-20 15:12:03,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:03,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:03,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660301518] [2020-07-20 15:12:03,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:03,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:03,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:03,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:03,335 INFO L87 Difference]: Start difference. First operand 15798 states and 25636 transitions. Second operand 3 states. [2020-07-20 15:12:04,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:04,771 INFO L93 Difference]: Finished difference Result 46617 states and 75575 transitions. [2020-07-20 15:12:04,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:04,772 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 15:12:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:04,860 INFO L225 Difference]: With dead ends: 46617 [2020-07-20 15:12:04,860 INFO L226 Difference]: Without dead ends: 31195 [2020-07-20 15:12:04,898 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 [2020-07-20 15:12:04,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31195 states. [2020-07-20 15:12:05,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31195 to 31089. [2020-07-20 15:12:05,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31089 states. [2020-07-20 15:12:05,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31089 states to 31089 states and 50267 transitions. [2020-07-20 15:12:05,983 INFO L78 Accepts]: Start accepts. Automaton has 31089 states and 50267 transitions. Word has length 499 [2020-07-20 15:12:05,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:05,983 INFO L479 AbstractCegarLoop]: Abstraction has 31089 states and 50267 transitions. [2020-07-20 15:12:05,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:05,984 INFO L276 IsEmpty]: Start isEmpty. Operand 31089 states and 50267 transitions. [2020-07-20 15:12:06,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 15:12:06,010 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:06,010 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] [2020-07-20 15:12:06,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:06,217 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:06,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:06,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1312362157, now seen corresponding path program 1 times [2020-07-20 15:12:06,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:06,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129618174] [2020-07-20 15:12:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:12:06,527 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:12:06,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:06,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 1468 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:06,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:06,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:06,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129618174] [2020-07-20 15:12:06,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:06,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:06,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331925215] [2020-07-20 15:12:06,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:06,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:06,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:06,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:06,659 INFO L87 Difference]: Start difference. First operand 31089 states and 50267 transitions. Second operand 3 states. [2020-07-20 15:12:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:08,327 INFO L93 Difference]: Finished difference Result 93014 states and 150365 transitions. [2020-07-20 15:12:08,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:08,327 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 15:12:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:08,421 INFO L225 Difference]: With dead ends: 93014 [2020-07-20 15:12:08,421 INFO L226 Difference]: Without dead ends: 62039 [2020-07-20 15:12:08,496 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 [2020-07-20 15:12:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62039 states. [2020-07-20 15:12:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62039 to 31187. [2020-07-20 15:12:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31187 states. [2020-07-20 15:12:10,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31187 states to 31187 states and 50401 transitions. [2020-07-20 15:12:10,834 INFO L78 Accepts]: Start accepts. Automaton has 31187 states and 50401 transitions. Word has length 499 [2020-07-20 15:12:10,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:10,834 INFO L479 AbstractCegarLoop]: Abstraction has 31187 states and 50401 transitions. [2020-07-20 15:12:10,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:10,834 INFO L276 IsEmpty]: Start isEmpty. Operand 31187 states and 50401 transitions. [2020-07-20 15:12:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 15:12:10,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:10,856 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] [2020-07-20 15:12:11,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:11,064 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:11,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1131026839, now seen corresponding path program 1 times [2020-07-20 15:12:11,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:11,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264013523] [2020-07-20 15:12:11,067 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:12:11,417 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:11,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:11,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1679 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:11,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:11,589 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:11,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264013523] [2020-07-20 15:12:11,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:11,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:11,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223875975] [2020-07-20 15:12:11,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:11,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:11,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:11,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:11,595 INFO L87 Difference]: Start difference. First operand 31187 states and 50401 transitions. Second operand 3 states. [2020-07-20 15:12:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:13,782 INFO L93 Difference]: Finished difference Result 92607 states and 149623 transitions. [2020-07-20 15:12:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:13,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-20 15:12:13,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:13,851 INFO L225 Difference]: With dead ends: 92607 [2020-07-20 15:12:13,851 INFO L226 Difference]: Without dead ends: 61911 [2020-07-20 15:12:13,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:13,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61911 states. [2020-07-20 15:12:15,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61911 to 31339. [2020-07-20 15:12:15,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31339 states. [2020-07-20 15:12:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31339 states to 31339 states and 50625 transitions. [2020-07-20 15:12:15,097 INFO L78 Accepts]: Start accepts. Automaton has 31339 states and 50625 transitions. Word has length 500 [2020-07-20 15:12:15,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:15,098 INFO L479 AbstractCegarLoop]: Abstraction has 31339 states and 50625 transitions. [2020-07-20 15:12:15,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:15,098 INFO L276 IsEmpty]: Start isEmpty. Operand 31339 states and 50625 transitions. [2020-07-20 15:12:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 15:12:15,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:15,117 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] [2020-07-20 15:12:15,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:15,318 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:15,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1322532038, now seen corresponding path program 1 times [2020-07-20 15:12:15,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:15,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429873508] [2020-07-20 15:12:15,320 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:12:15,682 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:15,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:15,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 1680 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:15,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:16,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:16,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:16,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429873508] [2020-07-20 15:12:16,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:16,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:16,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464440767] [2020-07-20 15:12:16,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:16,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:16,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:16,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:16,800 INFO L87 Difference]: Start difference. First operand 31339 states and 50625 transitions. Second operand 3 states. [2020-07-20 15:12:18,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:18,768 INFO L93 Difference]: Finished difference Result 93616 states and 151232 transitions. [2020-07-20 15:12:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:18,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-20 15:12:18,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:18,839 INFO L225 Difference]: With dead ends: 93616 [2020-07-20 15:12:18,839 INFO L226 Difference]: Without dead ends: 62470 [2020-07-20 15:12:18,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:18,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62470 states. [2020-07-20 15:12:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62470 to 31466. [2020-07-20 15:12:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31466 states. [2020-07-20 15:12:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31466 states to 31466 states and 50803 transitions. [2020-07-20 15:12:20,134 INFO L78 Accepts]: Start accepts. Automaton has 31466 states and 50803 transitions. Word has length 500 [2020-07-20 15:12:20,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:20,134 INFO L479 AbstractCegarLoop]: Abstraction has 31466 states and 50803 transitions. [2020-07-20 15:12:20,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:20,134 INFO L276 IsEmpty]: Start isEmpty. Operand 31466 states and 50803 transitions. [2020-07-20 15:12:20,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 15:12:20,160 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:20,160 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] [2020-07-20 15:12:20,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:20,374 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:20,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:20,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1141222616, now seen corresponding path program 1 times [2020-07-20 15:12:20,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:20,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468850949] [2020-07-20 15:12:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:12:20,772 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:12:20,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:20,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 1910 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:20,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:21,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:21,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468850949] [2020-07-20 15:12:21,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:21,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:21,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244429080] [2020-07-20 15:12:21,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:21,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:21,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:21,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:21,083 INFO L87 Difference]: Start difference. First operand 31466 states and 50803 transitions. Second operand 3 states. [2020-07-20 15:12:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:22,863 INFO L93 Difference]: Finished difference Result 72468 states and 116763 transitions. [2020-07-20 15:12:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:22,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-20 15:12:22,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:22,915 INFO L225 Difference]: With dead ends: 72468 [2020-07-20 15:12:22,916 INFO L226 Difference]: Without dead ends: 48126 [2020-07-20 15:12:22,942 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 [2020-07-20 15:12:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48126 states. [2020-07-20 15:12:24,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48126 to 41272. [2020-07-20 15:12:24,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41272 states. [2020-07-20 15:12:24,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41272 states to 41272 states and 66951 transitions. [2020-07-20 15:12:24,767 INFO L78 Accepts]: Start accepts. Automaton has 41272 states and 66951 transitions. Word has length 501 [2020-07-20 15:12:24,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:24,768 INFO L479 AbstractCegarLoop]: Abstraction has 41272 states and 66951 transitions. [2020-07-20 15:12:24,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:24,768 INFO L276 IsEmpty]: Start isEmpty. Operand 41272 states and 66951 transitions. [2020-07-20 15:12:24,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 15:12:24,793 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:24,794 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] [2020-07-20 15:12:25,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:25,008 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:25,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:25,009 INFO L82 PathProgramCache]: Analyzing trace with hash 56197873, now seen corresponding path program 1 times [2020-07-20 15:12:25,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:25,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519908646] [2020-07-20 15:12:25,010 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:12:25,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:12:25,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:25,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:12:25,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:25,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:25,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519908646] [2020-07-20 15:12:25,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:25,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:12:25,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265563425] [2020-07-20 15:12:25,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:12:25,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:25,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:12:25,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:12:25,659 INFO L87 Difference]: Start difference. First operand 41272 states and 66951 transitions. Second operand 3 states. [2020-07-20 15:12:30,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:30,519 INFO L93 Difference]: Finished difference Result 120637 states and 195504 transitions. [2020-07-20 15:12:30,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:12:30,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-20 15:12:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:30,609 INFO L225 Difference]: With dead ends: 120637 [2020-07-20 15:12:30,610 INFO L226 Difference]: Without dead ends: 80909 [2020-07-20 15:12:30,645 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 [2020-07-20 15:12:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80909 states. [2020-07-20 15:12:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80909 to 80868. [2020-07-20 15:12:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80868 states. [2020-07-20 15:12:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80868 states to 80868 states and 130735 transitions. [2020-07-20 15:12:34,116 INFO L78 Accepts]: Start accepts. Automaton has 80868 states and 130735 transitions. Word has length 501 [2020-07-20 15:12:34,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:34,117 INFO L479 AbstractCegarLoop]: Abstraction has 80868 states and 130735 transitions. [2020-07-20 15:12:34,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 80868 states and 130735 transitions. [2020-07-20 15:12:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 15:12:34,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:34,152 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] [2020-07-20 15:12:34,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:34,353 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:34,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:34,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1880531176, now seen corresponding path program 1 times [2020-07-20 15:12:34,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:34,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856462666] [2020-07-20 15:12:34,356 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:12:34,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:12:34,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:34,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 1919 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:12:34,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:34,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:34,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:34,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856462666] [2020-07-20 15:12:34,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:34,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:12:34,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380383677] [2020-07-20 15:12:34,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:12:34,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:34,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:12:34,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:12:34,957 INFO L87 Difference]: Start difference. First operand 80868 states and 130735 transitions. Second operand 4 states. [2020-07-20 15:12:43,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:12:43,644 INFO L93 Difference]: Finished difference Result 238294 states and 385211 transitions. [2020-07-20 15:12:43,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:12:43,645 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-20 15:12:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:12:43,828 INFO L225 Difference]: With dead ends: 238294 [2020-07-20 15:12:43,828 INFO L226 Difference]: Without dead ends: 159132 [2020-07-20 15:12:43,895 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 [2020-07-20 15:12:44,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159132 states. [2020-07-20 15:12:51,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159132 to 158850. [2020-07-20 15:12:51,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158850 states. [2020-07-20 15:12:51,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158850 states to 158850 states and 256035 transitions. [2020-07-20 15:12:51,325 INFO L78 Accepts]: Start accepts. Automaton has 158850 states and 256035 transitions. Word has length 502 [2020-07-20 15:12:51,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:51,326 INFO L479 AbstractCegarLoop]: Abstraction has 158850 states and 256035 transitions. [2020-07-20 15:12:51,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:12:51,326 INFO L276 IsEmpty]: Start isEmpty. Operand 158850 states and 256035 transitions. [2020-07-20 15:12:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-20 15:12:51,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:51,397 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] [2020-07-20 15:12:53,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:53,921 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:53,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:53,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1646646296, now seen corresponding path program 1 times [2020-07-20 15:12:53,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:53,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286371694] [2020-07-20 15:12:53,923 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:12:54,286 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:12:54,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:54,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:12:54,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:54,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:54,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286371694] [2020-07-20 15:12:54,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:54,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:12:54,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87154314] [2020-07-20 15:12:54,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:12:54,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:54,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:12:54,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:12:54,452 INFO L87 Difference]: Start difference. First operand 158850 states and 256035 transitions. Second operand 4 states. [2020-07-20 15:13:02,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:13:02,881 INFO L93 Difference]: Finished difference Result 340567 states and 549897 transitions. [2020-07-20 15:13:02,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:13:02,882 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 503 [2020-07-20 15:13:02,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:13:03,081 INFO L225 Difference]: With dead ends: 340567 [2020-07-20 15:13:03,081 INFO L226 Difference]: Without dead ends: 172171 [2020-07-20 15:13:03,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:13:03,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172171 states. [2020-07-20 15:13:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172171 to 172001. [2020-07-20 15:13:14,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172001 states. [2020-07-20 15:13:15,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172001 states to 172001 states and 276986 transitions. [2020-07-20 15:13:15,079 INFO L78 Accepts]: Start accepts. Automaton has 172001 states and 276986 transitions. Word has length 503 [2020-07-20 15:13:15,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:13:15,080 INFO L479 AbstractCegarLoop]: Abstraction has 172001 states and 276986 transitions. [2020-07-20 15:13:15,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:13:15,080 INFO L276 IsEmpty]: Start isEmpty. Operand 172001 states and 276986 transitions. [2020-07-20 15:13:15,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 15:13:15,157 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:13:15,157 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] [2020-07-20 15:13:15,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:13:15,358 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:13:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:13:15,359 INFO L82 PathProgramCache]: Analyzing trace with hash 746858481, now seen corresponding path program 1 times [2020-07-20 15:13:15,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:13:15,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599931357] [2020-07-20 15:13:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:13:15,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:13:15,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:13:15,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 1918 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:13:15,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:13:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:13:16,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:13:16,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599931357] [2020-07-20 15:13:16,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:13:16,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:13:16,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083487987] [2020-07-20 15:13:16,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:13:16,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:13:16,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:13:16,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:13:16,332 INFO L87 Difference]: Start difference. First operand 172001 states and 276986 transitions. Second operand 3 states. [2020-07-20 15:13:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:13:34,413 INFO L93 Difference]: Finished difference Result 499799 states and 803364 transitions. [2020-07-20 15:13:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:13:34,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-20 15:13:34,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:13:34,914 INFO L225 Difference]: With dead ends: 499799 [2020-07-20 15:13:34,914 INFO L226 Difference]: Without dead ends: 334851 [2020-07-20 15:13:35,041 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 [2020-07-20 15:13:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334851 states. [2020-07-20 15:13:57,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334851 to 334633. [2020-07-20 15:13:57,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334633 states. [2020-07-20 15:13:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334633 states to 334633 states and 536475 transitions. [2020-07-20 15:13:58,035 INFO L78 Accepts]: Start accepts. Automaton has 334633 states and 536475 transitions. Word has length 504 [2020-07-20 15:13:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:13:58,036 INFO L479 AbstractCegarLoop]: Abstraction has 334633 states and 536475 transitions. [2020-07-20 15:13:58,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:13:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 334633 states and 536475 transitions. [2020-07-20 15:13:58,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 15:13:58,219 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:13:58,219 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] [2020-07-20 15:13:58,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:13:58,420 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:13:58,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:13:58,422 INFO L82 PathProgramCache]: Analyzing trace with hash 691299168, now seen corresponding path program 1 times [2020-07-20 15:13:58,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:13:58,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066244997] [2020-07-20 15:13:58,423 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:13:58,807 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:13:58,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:13:58,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1910 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:13:58,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:13:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:13:59,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:13:59,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066244997] [2020-07-20 15:13:59,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:13:59,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:13:59,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994380604] [2020-07-20 15:13:59,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:13:59,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:13:59,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:13:59,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:13:59,020 INFO L87 Difference]: Start difference. First operand 334633 states and 536475 transitions. Second operand 3 states. [2020-07-20 15:14:36,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:14:36,324 INFO L93 Difference]: Finished difference Result 986842 states and 1580762 transitions. [2020-07-20 15:14:36,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:14:36,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 505 [2020-07-20 15:14:36,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:14:43,554 INFO L225 Difference]: With dead ends: 986842 [2020-07-20 15:14:43,554 INFO L226 Difference]: Without dead ends: 658998 [2020-07-20 15:14:43,807 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 [2020-07-20 15:14:44,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658998 states. [2020-07-20 15:15:26,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658998 to 658860. [2020-07-20 15:15:26,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658860 states. [2020-07-20 15:15:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658860 states to 658860 states and 1052277 transitions. [2020-07-20 15:15:28,313 INFO L78 Accepts]: Start accepts. Automaton has 658860 states and 1052277 transitions. Word has length 505 [2020-07-20 15:15:28,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:15:28,314 INFO L479 AbstractCegarLoop]: Abstraction has 658860 states and 1052277 transitions. [2020-07-20 15:15:28,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:15:28,314 INFO L276 IsEmpty]: Start isEmpty. Operand 658860 states and 1052277 transitions. [2020-07-20 15:15:28,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 15:15:28,689 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:15:28,689 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] [2020-07-20 15:15:28,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:15:28,891 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:15:28,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:15:28,892 INFO L82 PathProgramCache]: Analyzing trace with hash 392015395, now seen corresponding path program 1 times [2020-07-20 15:15:28,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:15:28,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801509142] [2020-07-20 15:15:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:15:29,209 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:15:29,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:15:29,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:15:29,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:15:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:15:29,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:15:29,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801509142] [2020-07-20 15:15:29,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:15:29,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:15:29,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047458383] [2020-07-20 15:15:29,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:15:29,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:15:29,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:15:29,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:15:29,323 INFO L87 Difference]: Start difference. First operand 658860 states and 1052277 transitions. Second operand 4 states. [2020-07-20 15:17:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:17:00,340 INFO L93 Difference]: Finished difference Result 1879632 states and 2996402 transitions. [2020-07-20 15:17:00,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:17:00,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-20 15:17:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:17:02,081 INFO L225 Difference]: With dead ends: 1879632 [2020-07-20 15:17:02,081 INFO L226 Difference]: Without dead ends: 1242550 [2020-07-20 15:17:02,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:17:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242550 states. [2020-07-20 15:17:59,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242550 to 672586. [2020-07-20 15:17:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672586 states. [2020-07-20 15:18:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672586 states to 672586 states and 1075328 transitions. [2020-07-20 15:18:00,981 INFO L78 Accepts]: Start accepts. Automaton has 672586 states and 1075328 transitions. Word has length 505 [2020-07-20 15:18:00,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:18:00,981 INFO L479 AbstractCegarLoop]: Abstraction has 672586 states and 1075328 transitions. [2020-07-20 15:18:00,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:18:00,981 INFO L276 IsEmpty]: Start isEmpty. Operand 672586 states and 1075328 transitions. [2020-07-20 15:18:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-20 15:18:01,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:18:01,313 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] [2020-07-20 15:18:01,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:18:01,514 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:18:01,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:18:01,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2108167364, now seen corresponding path program 1 times [2020-07-20 15:18:01,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:18:01,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666850585] [2020-07-20 15:18:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:18:01,876 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:18:01,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:18:01,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:18:01,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:18:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:18:02,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:18:02,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666850585] [2020-07-20 15:18:02,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:18:02,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:18:02,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582393967] [2020-07-20 15:18:02,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:18:02,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:18:02,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:18:02,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:18:02,008 INFO L87 Difference]: Start difference. First operand 672586 states and 1075328 transitions. Second operand 4 states. [2020-07-20 15:19:08,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:19:08,528 INFO L93 Difference]: Finished difference Result 1476167 states and 2364730 transitions. [2020-07-20 15:19:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:19:08,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 507 [2020-07-20 15:19:08,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:19:09,562 INFO L225 Difference]: With dead ends: 1476167 [2020-07-20 15:19:09,562 INFO L226 Difference]: Without dead ends: 753712 [2020-07-20 15:19:10,024 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 [2020-07-20 15:19:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753712 states. [2020-07-20 15:20:09,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753712 to 753671. [2020-07-20 15:20:09,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 753671 states. [2020-07-20 15:20:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753671 states to 753671 states and 1204839 transitions. [2020-07-20 15:20:10,287 INFO L78 Accepts]: Start accepts. Automaton has 753671 states and 1204839 transitions. Word has length 507 [2020-07-20 15:20:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:20:10,288 INFO L479 AbstractCegarLoop]: Abstraction has 753671 states and 1204839 transitions. [2020-07-20 15:20:10,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:20:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 753671 states and 1204839 transitions. [2020-07-20 15:20:12,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-20 15:20:12,012 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:20:12,013 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] [2020-07-20 15:20:12,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:20:12,214 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:20:12,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:20:12,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2115440435, now seen corresponding path program 1 times [2020-07-20 15:20:12,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:20:12,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455468487] [2020-07-20 15:20:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 [2020-07-20 15:20:12,529 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:20:12,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:20:12,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 1471 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:20:12,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:20:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:20:12,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:20:12,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455468487] [2020-07-20 15:20:12,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:20:12,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:20:12,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970811630] [2020-07-20 15:20:12,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:20:12,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:20:12,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:20:12,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:20:12,676 INFO L87 Difference]: Start difference. First operand 753671 states and 1204839 transitions. Second operand 3 states. [2020-07-20 15:22:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:22:02,649 INFO L93 Difference]: Finished difference Result 2163465 states and 3447357 transitions. [2020-07-20 15:22:02,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:22:02,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 508 [2020-07-20 15:22:02,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:22:05,341 INFO L225 Difference]: With dead ends: 2163465 [2020-07-20 15:22:05,341 INFO L226 Difference]: Without dead ends: 1458927 [2020-07-20 15:22:05,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:22:06,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458927 states.