/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 21:13:24,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 21:13:24,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 21:13:24,806 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 21:13:24,806 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 21:13:24,809 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 21:13:24,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 21:13:24,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 21:13:24,825 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 21:13:24,828 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 21:13:24,830 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 21:13:24,831 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 21:13:24,831 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 21:13:24,833 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 21:13:24,834 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 21:13:24,836 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 21:13:24,837 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 21:13:24,838 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 21:13:24,839 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 21:13:24,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 21:13:24,848 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 21:13:24,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 21:13:24,852 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 21:13:24,852 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 21:13:24,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 21:13:24,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 21:13:24,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 21:13:24,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 21:13:24,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 21:13:24,904 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 21:13:24,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 21:13:24,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 21:13:24,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 21:13:24,907 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 21:13:24,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 21:13:24,907 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 21:13:24,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 21:13:24,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 21:13:24,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 21:13:24,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 21:13:24,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 21:13:24,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 21:13:24,912 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 21:13:24,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 21:13:24,913 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 21:13:24,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 21:13:24,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 21:13:24,913 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 21:13:24,913 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 21:13:24,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 21:13:24,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:13:24,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 21:13:24,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 21:13:24,916 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 21:13:24,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 21:13:24,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:24,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 21:13:24,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 21:13:24,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 21:13:25,188 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 21:13:25,200 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 21:13:25,204 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 21:13:25,205 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 21:13:25,205 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 21:13:25,206 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 21:13:25,271 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f56337c/66fd74fb456c497a9a04d4be187e98f1/FLAG871c9f42d [2020-07-21 21:13:25,971 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 21:13:25,972 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 21:13:26,005 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f56337c/66fd74fb456c497a9a04d4be187e98f1/FLAG871c9f42d [2020-07-21 21:13:26,128 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45f56337c/66fd74fb456c497a9a04d4be187e98f1 [2020-07-21 21:13:26,137 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 21:13:26,140 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 21:13:26,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 21:13:26,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 21:13:26,145 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 21:13:26,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:13:26" (1/1) ... [2020-07-21 21:13:26,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52ab4010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:26, skipping insertion in model container [2020-07-21 21:13:26,148 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:13:26" (1/1) ... [2020-07-21 21:13:26,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 21:13:26,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 21:13:29,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:13:29,036 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 21:13:30,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:13:30,957 INFO L208 MainTranslator]: Completed translation [2020-07-21 21:13:30,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:30 WrapperNode [2020-07-21 21:13:30,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 21:13:30,959 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 21:13:30,959 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 21:13:30,959 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 21:13:30,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:30" (1/1) ... [2020-07-21 21:13:30,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:30" (1/1) ... [2020-07-21 21:13:31,060 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:30" (1/1) ... [2020-07-21 21:13:31,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:30" (1/1) ... [2020-07-21 21:13:31,146 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:30" (1/1) ... [2020-07-21 21:13:31,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:30" (1/1) ... [2020-07-21 21:13:31,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:30" (1/1) ... [2020-07-21 21:13:31,322 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 21:13:31,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 21:13:31,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 21:13:31,323 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 21:13:31,324 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:13:31,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 21:13:31,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 21:13:31,389 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 21:13:31,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 21:13:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 21:13:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 21:13:31,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 21:13:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 21:13:31,391 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 21:13:31,392 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 21:13:31,392 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 21:13:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 21:13:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 21:13:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 21:13:31,393 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 21:13:31,394 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 21:13:31,394 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 21:13:31,394 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 21:13:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 21:13:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 21:13:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 21:13:31,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 21:13:37,663 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 21:13:37,664 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 21:13:37,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:13:37 BoogieIcfgContainer [2020-07-21 21:13:37,681 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 21:13:37,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 21:13:37,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 21:13:37,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 21:13:37,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:13:26" (1/3) ... [2020-07-21 21:13:37,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab998bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:13:37, skipping insertion in model container [2020-07-21 21:13:37,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:13:30" (2/3) ... [2020-07-21 21:13:37,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ab998bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:13:37, skipping insertion in model container [2020-07-21 21:13:37,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:13:37" (3/3) ... [2020-07-21 21:13:37,692 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 21:13:37,703 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 21:13:37,712 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 21:13:37,727 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 21:13:37,759 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 21:13:37,760 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 21:13:37,760 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 21:13:37,760 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 21:13:37,760 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 21:13:37,760 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 21:13:37,761 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 21:13:37,761 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 21:13:37,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2515 states. [2020-07-21 21:13:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 21:13:37,860 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:37,862 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] [2020-07-21 21:13:37,863 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:37,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1936618047, now seen corresponding path program 1 times [2020-07-21 21:13:37,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:37,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891968807] [2020-07-21 21:13:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:38,513 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:38,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:38,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 21:13:38,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:38,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:38,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891968807] [2020-07-21 21:13:38,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:38,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:13:38,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303663384] [2020-07-21 21:13:38,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:13:38,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:38,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:13:38,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:13:38,756 INFO L87 Difference]: Start difference. First operand 2515 states. Second operand 4 states. [2020-07-21 21:13:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:39,070 INFO L93 Difference]: Finished difference Result 4047 states and 7028 transitions. [2020-07-21 21:13:39,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:13:39,072 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 322 [2020-07-21 21:13:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:39,117 INFO L225 Difference]: With dead ends: 4047 [2020-07-21 21:13:39,117 INFO L226 Difference]: Without dead ends: 2511 [2020-07-21 21:13:39,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:13:39,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2020-07-21 21:13:39,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2511. [2020-07-21 21:13:39,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2511 states. [2020-07-21 21:13:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2511 states to 2511 states and 4372 transitions. [2020-07-21 21:13:39,306 INFO L78 Accepts]: Start accepts. Automaton has 2511 states and 4372 transitions. Word has length 322 [2020-07-21 21:13:39,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:39,308 INFO L479 AbstractCegarLoop]: Abstraction has 2511 states and 4372 transitions. [2020-07-21 21:13:39,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:13:39,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2511 states and 4372 transitions. [2020-07-21 21:13:39,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-21 21:13:39,322 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:39,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:39,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:39,537 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:39,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:39,538 INFO L82 PathProgramCache]: Analyzing trace with hash 237230463, now seen corresponding path program 1 times [2020-07-21 21:13:39,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:39,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945324553] [2020-07-21 21:13:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:39,996 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:39,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:40,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 1675 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:40,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:40,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:40,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945324553] [2020-07-21 21:13:40,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:40,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:40,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845079963] [2020-07-21 21:13:40,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:40,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:40,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:40,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:40,202 INFO L87 Difference]: Start difference. First operand 2511 states and 4372 transitions. Second operand 3 states. [2020-07-21 21:13:40,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:40,678 INFO L93 Difference]: Finished difference Result 5485 states and 9414 transitions. [2020-07-21 21:13:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:40,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 331 [2020-07-21 21:13:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:40,705 INFO L225 Difference]: With dead ends: 5485 [2020-07-21 21:13:40,706 INFO L226 Difference]: Without dead ends: 3917 [2020-07-21 21:13:40,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2020-07-21 21:13:40,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3913. [2020-07-21 21:13:40,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3913 states. [2020-07-21 21:13:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 6736 transitions. [2020-07-21 21:13:40,888 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 6736 transitions. Word has length 331 [2020-07-21 21:13:40,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:40,893 INFO L479 AbstractCegarLoop]: Abstraction has 3913 states and 6736 transitions. [2020-07-21 21:13:40,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:40,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 6736 transitions. [2020-07-21 21:13:40,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 21:13:40,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:40,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:13:41,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:41,126 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:41,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:41,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1663160899, now seen corresponding path program 1 times [2020-07-21 21:13:41,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:41,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103160363] [2020-07-21 21:13:41,129 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:41,582 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:41,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:41,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 1674 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:41,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:41,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:41,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103160363] [2020-07-21 21:13:41,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:41,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:41,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893160439] [2020-07-21 21:13:41,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:41,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:41,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:41,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:41,786 INFO L87 Difference]: Start difference. First operand 3913 states and 6736 transitions. Second operand 3 states. [2020-07-21 21:13:42,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:42,321 INFO L93 Difference]: Finished difference Result 7716 states and 13178 transitions. [2020-07-21 21:13:42,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:42,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 21:13:42,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:42,357 INFO L225 Difference]: With dead ends: 7716 [2020-07-21 21:13:42,357 INFO L226 Difference]: Without dead ends: 5221 [2020-07-21 21:13:42,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:42,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5221 states. [2020-07-21 21:13:42,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5221 to 5054. [2020-07-21 21:13:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5054 states. [2020-07-21 21:13:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5054 states to 5054 states and 8661 transitions. [2020-07-21 21:13:42,605 INFO L78 Accepts]: Start accepts. Automaton has 5054 states and 8661 transitions. Word has length 332 [2020-07-21 21:13:42,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:42,606 INFO L479 AbstractCegarLoop]: Abstraction has 5054 states and 8661 transitions. [2020-07-21 21:13:42,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:42,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5054 states and 8661 transitions. [2020-07-21 21:13:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 21:13:42,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:42,634 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] [2020-07-21 21:13:42,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:42,850 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:42,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:42,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1738401562, now seen corresponding path program 1 times [2020-07-21 21:13:42,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:42,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097125132] [2020-07-21 21:13:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:43,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:43,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:43,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 21:13:43,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:43,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:43,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097125132] [2020-07-21 21:13:43,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:43,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:13:43,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956074015] [2020-07-21 21:13:43,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:13:43,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:43,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:13:43,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:13:43,472 INFO L87 Difference]: Start difference. First operand 5054 states and 8661 transitions. Second operand 4 states. [2020-07-21 21:13:43,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:43,623 INFO L93 Difference]: Finished difference Result 6028 states and 10309 transitions. [2020-07-21 21:13:43,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:13:43,623 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 21:13:43,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:43,648 INFO L225 Difference]: With dead ends: 6028 [2020-07-21 21:13:43,649 INFO L226 Difference]: Without dead ends: 4821 [2020-07-21 21:13:43,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:13:43,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4821 states. [2020-07-21 21:13:43,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4821 to 4658. [2020-07-21 21:13:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4658 states. [2020-07-21 21:13:43,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 7983 transitions. [2020-07-21 21:13:43,814 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 7983 transitions. Word has length 338 [2020-07-21 21:13:43,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:43,815 INFO L479 AbstractCegarLoop]: Abstraction has 4658 states and 7983 transitions. [2020-07-21 21:13:43,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:13:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 7983 transitions. [2020-07-21 21:13:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 21:13:43,831 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:43,831 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] [2020-07-21 21:13:44,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:44,046 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:44,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1928852562, now seen corresponding path program 1 times [2020-07-21 21:13:44,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:44,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637769930] [2020-07-21 21:13:44,048 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:44,411 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:44,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 21:13:44,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:44,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:44,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637769930] [2020-07-21 21:13:44,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:44,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:13:44,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325078789] [2020-07-21 21:13:44,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:13:44,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:44,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:13:44,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:13:44,509 INFO L87 Difference]: Start difference. First operand 4658 states and 7983 transitions. Second operand 4 states. [2020-07-21 21:13:44,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:44,646 INFO L93 Difference]: Finished difference Result 6404 states and 10933 transitions. [2020-07-21 21:13:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:13:44,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 346 [2020-07-21 21:13:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:44,671 INFO L225 Difference]: With dead ends: 6404 [2020-07-21 21:13:44,671 INFO L226 Difference]: Without dead ends: 4425 [2020-07-21 21:13:44,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:13:44,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4425 states. [2020-07-21 21:13:44,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4425 to 4262. [2020-07-21 21:13:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4262 states. [2020-07-21 21:13:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4262 states to 4262 states and 7305 transitions. [2020-07-21 21:13:44,844 INFO L78 Accepts]: Start accepts. Automaton has 4262 states and 7305 transitions. Word has length 346 [2020-07-21 21:13:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:44,845 INFO L479 AbstractCegarLoop]: Abstraction has 4262 states and 7305 transitions. [2020-07-21 21:13:44,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:13:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 4262 states and 7305 transitions. [2020-07-21 21:13:44,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-21 21:13:44,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:44,864 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] [2020-07-21 21:13:45,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:45,079 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:45,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:45,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1478628417, now seen corresponding path program 1 times [2020-07-21 21:13:45,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:45,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832438770] [2020-07-21 21:13:45,081 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:45,560 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:45,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:45,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 21:13:45,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:45,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:45,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832438770] [2020-07-21 21:13:45,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:45,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:13:45,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001912861] [2020-07-21 21:13:45,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:13:45,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:45,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:13:45,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:13:45,660 INFO L87 Difference]: Start difference. First operand 4262 states and 7305 transitions. Second operand 4 states. [2020-07-21 21:13:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:45,906 INFO L93 Difference]: Finished difference Result 7973 states and 13574 transitions. [2020-07-21 21:13:45,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:13:45,906 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 354 [2020-07-21 21:13:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:45,945 INFO L225 Difference]: With dead ends: 7973 [2020-07-21 21:13:45,945 INFO L226 Difference]: Without dead ends: 4262 [2020-07-21 21:13:45,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 351 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:13:45,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4262 states. [2020-07-21 21:13:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4262 to 4262. [2020-07-21 21:13:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4262 states. [2020-07-21 21:13:46,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4262 states to 4262 states and 7240 transitions. [2020-07-21 21:13:46,122 INFO L78 Accepts]: Start accepts. Automaton has 4262 states and 7240 transitions. Word has length 354 [2020-07-21 21:13:46,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:46,123 INFO L479 AbstractCegarLoop]: Abstraction has 4262 states and 7240 transitions. [2020-07-21 21:13:46,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:13:46,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4262 states and 7240 transitions. [2020-07-21 21:13:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-21 21:13:46,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:46,149 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] [2020-07-21 21:13:46,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:46,363 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:46,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:46,365 INFO L82 PathProgramCache]: Analyzing trace with hash -539721894, now seen corresponding path program 1 times [2020-07-21 21:13:46,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:46,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014013871] [2020-07-21 21:13:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:46,819 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:46,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:46,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 21:13:46,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:46,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:46,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014013871] [2020-07-21 21:13:46,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:46,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:13:46,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048420321] [2020-07-21 21:13:46,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:13:46,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:13:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:13:46,992 INFO L87 Difference]: Start difference. First operand 4262 states and 7240 transitions. Second operand 4 states. [2020-07-21 21:13:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:47,125 INFO L93 Difference]: Finished difference Result 5453 states and 9249 transitions. [2020-07-21 21:13:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:13:47,126 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-07-21 21:13:47,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:47,142 INFO L225 Difference]: With dead ends: 5453 [2020-07-21 21:13:47,143 INFO L226 Difference]: Without dead ends: 4087 [2020-07-21 21:13:47,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:13:47,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4087 states. [2020-07-21 21:13:47,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4087 to 3924. [2020-07-21 21:13:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3924 states. [2020-07-21 21:13:47,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 6660 transitions. [2020-07-21 21:13:47,294 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 6660 transitions. Word has length 418 [2020-07-21 21:13:47,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:47,295 INFO L479 AbstractCegarLoop]: Abstraction has 3924 states and 6660 transitions. [2020-07-21 21:13:47,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:13:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 6660 transitions. [2020-07-21 21:13:47,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-07-21 21:13:47,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:47,314 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] [2020-07-21 21:13:47,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:47,527 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:47,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:47,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1682790088, now seen corresponding path program 1 times [2020-07-21 21:13:47,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:47,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682210447] [2020-07-21 21:13:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:47,915 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:47,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:47,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1735 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:47,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:48,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:48,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:48,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682210447] [2020-07-21 21:13:48,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:48,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:48,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855921573] [2020-07-21 21:13:48,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:48,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:48,039 INFO L87 Difference]: Start difference. First operand 3924 states and 6660 transitions. Second operand 3 states. [2020-07-21 21:13:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:48,321 INFO L93 Difference]: Finished difference Result 8153 states and 13784 transitions. [2020-07-21 21:13:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:48,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 426 [2020-07-21 21:13:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:48,341 INFO L225 Difference]: With dead ends: 8153 [2020-07-21 21:13:48,341 INFO L226 Difference]: Without dead ends: 4837 [2020-07-21 21:13:48,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:48,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4837 states. [2020-07-21 21:13:48,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4837 to 4827. [2020-07-21 21:13:48,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4827 states. [2020-07-21 21:13:48,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 8177 transitions. [2020-07-21 21:13:48,571 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 8177 transitions. Word has length 426 [2020-07-21 21:13:48,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:48,572 INFO L479 AbstractCegarLoop]: Abstraction has 4827 states and 8177 transitions. [2020-07-21 21:13:48,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 8177 transitions. [2020-07-21 21:13:48,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-07-21 21:13:48,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:48,640 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] [2020-07-21 21:13:48,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:48,841 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:48,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:48,841 INFO L82 PathProgramCache]: Analyzing trace with hash -317366695, now seen corresponding path program 1 times [2020-07-21 21:13:48,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:48,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528705777] [2020-07-21 21:13:48,842 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:49,227 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:49,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:49,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:49,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:49,412 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:49,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528705777] [2020-07-21 21:13:49,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:49,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:49,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168021283] [2020-07-21 21:13:49,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:49,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:49,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:49,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:49,415 INFO L87 Difference]: Start difference. First operand 4827 states and 8177 transitions. Second operand 3 states. [2020-07-21 21:13:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:49,732 INFO L93 Difference]: Finished difference Result 10254 states and 17319 transitions. [2020-07-21 21:13:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:49,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 429 [2020-07-21 21:13:49,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:49,751 INFO L225 Difference]: With dead ends: 10254 [2020-07-21 21:13:49,751 INFO L226 Difference]: Without dead ends: 7225 [2020-07-21 21:13:49,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:49,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7225 states. [2020-07-21 21:13:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7225 to 6355. [2020-07-21 21:13:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6355 states. [2020-07-21 21:13:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 10756 transitions. [2020-07-21 21:13:49,933 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 10756 transitions. Word has length 429 [2020-07-21 21:13:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:49,934 INFO L479 AbstractCegarLoop]: Abstraction has 6355 states and 10756 transitions. [2020-07-21 21:13:49,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 10756 transitions. [2020-07-21 21:13:49,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2020-07-21 21:13:49,948 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:49,949 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] [2020-07-21 21:13:50,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:50,163 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:50,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:50,164 INFO L82 PathProgramCache]: Analyzing trace with hash 2142943132, now seen corresponding path program 1 times [2020-07-21 21:13:50,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:50,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260631088] [2020-07-21 21:13:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:50,626 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:50,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:50,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1737 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:50,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:50,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:50,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260631088] [2020-07-21 21:13:50,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:50,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:50,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968995331] [2020-07-21 21:13:50,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:50,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:50,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:50,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:50,744 INFO L87 Difference]: Start difference. First operand 6355 states and 10756 transitions. Second operand 3 states. [2020-07-21 21:13:51,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:51,099 INFO L93 Difference]: Finished difference Result 14288 states and 24122 transitions. [2020-07-21 21:13:51,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:51,100 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 430 [2020-07-21 21:13:51,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:51,128 INFO L225 Difference]: With dead ends: 14288 [2020-07-21 21:13:51,129 INFO L226 Difference]: Without dead ends: 8674 [2020-07-21 21:13:51,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:51,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8674 states. [2020-07-21 21:13:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8674 to 8657. [2020-07-21 21:13:51,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8657 states. [2020-07-21 21:13:51,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8657 states to 8657 states and 14630 transitions. [2020-07-21 21:13:51,363 INFO L78 Accepts]: Start accepts. Automaton has 8657 states and 14630 transitions. Word has length 430 [2020-07-21 21:13:51,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:51,363 INFO L479 AbstractCegarLoop]: Abstraction has 8657 states and 14630 transitions. [2020-07-21 21:13:51,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 8657 states and 14630 transitions. [2020-07-21 21:13:51,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-07-21 21:13:51,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:51,377 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] [2020-07-21 21:13:51,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:51,593 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:51,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:51,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1353624916, now seen corresponding path program 1 times [2020-07-21 21:13:51,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:51,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666102104] [2020-07-21 21:13:51,595 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:51,972 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:51,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:51,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:51,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:52,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:52,433 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:52,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666102104] [2020-07-21 21:13:52,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:52,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:52,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262473054] [2020-07-21 21:13:52,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:52,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:52,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:52,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:52,436 INFO L87 Difference]: Start difference. First operand 8657 states and 14630 transitions. Second operand 3 states. [2020-07-21 21:13:52,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:52,959 INFO L93 Difference]: Finished difference Result 18887 states and 31856 transitions. [2020-07-21 21:13:52,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:52,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 433 [2020-07-21 21:13:52,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:53,011 INFO L225 Difference]: With dead ends: 18887 [2020-07-21 21:13:53,011 INFO L226 Difference]: Without dead ends: 13002 [2020-07-21 21:13:53,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13002 states. [2020-07-21 21:13:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13002 to 11899. [2020-07-21 21:13:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11899 states. [2020-07-21 21:13:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11899 states to 11899 states and 20096 transitions. [2020-07-21 21:13:53,368 INFO L78 Accepts]: Start accepts. Automaton has 11899 states and 20096 transitions. Word has length 433 [2020-07-21 21:13:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:53,369 INFO L479 AbstractCegarLoop]: Abstraction has 11899 states and 20096 transitions. [2020-07-21 21:13:53,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 11899 states and 20096 transitions. [2020-07-21 21:13:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-07-21 21:13:53,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:53,385 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] [2020-07-21 21:13:53,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:53,598 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:53,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:53,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1886333752, now seen corresponding path program 1 times [2020-07-21 21:13:53,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:53,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763015293] [2020-07-21 21:13:53,600 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:53,972 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:53,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:53,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 1739 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:53,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:54,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:54,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763015293] [2020-07-21 21:13:54,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:54,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:54,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720595897] [2020-07-21 21:13:54,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:54,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:54,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:54,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:54,075 INFO L87 Difference]: Start difference. First operand 11899 states and 20096 transitions. Second operand 3 states. [2020-07-21 21:13:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:54,518 INFO L93 Difference]: Finished difference Result 28696 states and 48394 transitions. [2020-07-21 21:13:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:54,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 434 [2020-07-21 21:13:54,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:54,565 INFO L225 Difference]: With dead ends: 28696 [2020-07-21 21:13:54,565 INFO L226 Difference]: Without dead ends: 17711 [2020-07-21 21:13:54,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 432 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:54,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17711 states. [2020-07-21 21:13:55,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17711 to 17674. [2020-07-21 21:13:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17674 states. [2020-07-21 21:13:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17674 states to 17674 states and 29815 transitions. [2020-07-21 21:13:55,047 INFO L78 Accepts]: Start accepts. Automaton has 17674 states and 29815 transitions. Word has length 434 [2020-07-21 21:13:55,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:55,048 INFO L479 AbstractCegarLoop]: Abstraction has 17674 states and 29815 transitions. [2020-07-21 21:13:55,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 17674 states and 29815 transitions. [2020-07-21 21:13:55,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-07-21 21:13:55,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:55,062 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] [2020-07-21 21:13:55,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:55,268 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:55,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:55,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1558023399, now seen corresponding path program 1 times [2020-07-21 21:13:55,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:55,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396541466] [2020-07-21 21:13:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:55,659 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:55,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:55,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:55,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:55,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:55,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396541466] [2020-07-21 21:13:55,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:55,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:55,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389655305] [2020-07-21 21:13:55,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:55,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:55,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:55,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:55,871 INFO L87 Difference]: Start difference. First operand 17674 states and 29815 transitions. Second operand 3 states. [2020-07-21 21:13:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:57,109 INFO L93 Difference]: Finished difference Result 39675 states and 66847 transitions. [2020-07-21 21:13:57,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:57,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 437 [2020-07-21 21:13:57,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:57,168 INFO L225 Difference]: With dead ends: 39675 [2020-07-21 21:13:57,169 INFO L226 Difference]: Without dead ends: 26719 [2020-07-21 21:13:57,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:57,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26719 states. [2020-07-21 21:13:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26719 to 25015. [2020-07-21 21:13:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25015 states. [2020-07-21 21:13:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25015 states to 25015 states and 42178 transitions. [2020-07-21 21:13:58,026 INFO L78 Accepts]: Start accepts. Automaton has 25015 states and 42178 transitions. Word has length 437 [2020-07-21 21:13:58,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:13:58,027 INFO L479 AbstractCegarLoop]: Abstraction has 25015 states and 42178 transitions. [2020-07-21 21:13:58,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:13:58,027 INFO L276 IsEmpty]: Start isEmpty. Operand 25015 states and 42178 transitions. [2020-07-21 21:13:58,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-07-21 21:13:58,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:13:58,052 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] [2020-07-21 21:13:58,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:58,268 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:13:58,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:13:58,269 INFO L82 PathProgramCache]: Analyzing trace with hash 159609948, now seen corresponding path program 1 times [2020-07-21 21:13:58,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:13:58,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561758963] [2020-07-21 21:13:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:13:58,648 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:13:58,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:13:58,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:13:58,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:13:58,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:13:58,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:13:58,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561758963] [2020-07-21 21:13:58,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:13:58,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:13:58,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227750056] [2020-07-21 21:13:58,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:13:58,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:13:58,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:13:58,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:58,946 INFO L87 Difference]: Start difference. First operand 25015 states and 42178 transitions. Second operand 3 states. [2020-07-21 21:13:59,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:13:59,658 INFO L93 Difference]: Finished difference Result 63999 states and 107822 transitions. [2020-07-21 21:13:59,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:13:59,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 438 [2020-07-21 21:13:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:13:59,749 INFO L225 Difference]: With dead ends: 63999 [2020-07-21 21:13:59,749 INFO L226 Difference]: Without dead ends: 40111 [2020-07-21 21:13:59,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:13:59,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40111 states. [2020-07-21 21:14:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40111 to 40016. [2020-07-21 21:14:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40016 states. [2020-07-21 21:14:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40016 states to 40016 states and 67406 transitions. [2020-07-21 21:14:02,031 INFO L78 Accepts]: Start accepts. Automaton has 40016 states and 67406 transitions. Word has length 438 [2020-07-21 21:14:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:14:02,032 INFO L479 AbstractCegarLoop]: Abstraction has 40016 states and 67406 transitions. [2020-07-21 21:14:02,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:14:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 40016 states and 67406 transitions. [2020-07-21 21:14:02,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2020-07-21 21:14:02,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:14:02,049 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] [2020-07-21 21:14:02,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:02,257 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:14:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:14:02,258 INFO L82 PathProgramCache]: Analyzing trace with hash 753923234, now seen corresponding path program 1 times [2020-07-21 21:14:02,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:14:02,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541309170] [2020-07-21 21:14:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:02,646 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:14:02,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:14:02,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:14:02,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:14:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:14:02,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:14:02,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541309170] [2020-07-21 21:14:02,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:14:02,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:14:02,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578232795] [2020-07-21 21:14:02,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:14:02,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:14:02,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:14:02,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:02,819 INFO L87 Difference]: Start difference. First operand 40016 states and 67406 transitions. Second operand 3 states. [2020-07-21 21:14:04,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:04,004 INFO L93 Difference]: Finished difference Result 92092 states and 155002 transitions. [2020-07-21 21:14:04,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:14:04,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 441 [2020-07-21 21:14:04,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:04,133 INFO L225 Difference]: With dead ends: 92092 [2020-07-21 21:14:04,134 INFO L226 Difference]: Without dead ends: 60573 [2020-07-21 21:14:04,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60573 states. [2020-07-21 21:14:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60573 to 57814. [2020-07-21 21:14:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57814 states. [2020-07-21 21:14:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57814 states to 57814 states and 97346 transitions. [2020-07-21 21:14:05,845 INFO L78 Accepts]: Start accepts. Automaton has 57814 states and 97346 transitions. Word has length 441 [2020-07-21 21:14:05,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:14:05,846 INFO L479 AbstractCegarLoop]: Abstraction has 57814 states and 97346 transitions. [2020-07-21 21:14:05,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:14:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 57814 states and 97346 transitions. [2020-07-21 21:14:05,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2020-07-21 21:14:05,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:14:05,866 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] [2020-07-21 21:14:06,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:06,067 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:14:06,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:14:06,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1006866632, now seen corresponding path program 1 times [2020-07-21 21:14:06,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:14:06,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729801814] [2020-07-21 21:14:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:06,452 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:14:06,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:14:06,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:14:06,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:14:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:14:06,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:14:06,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729801814] [2020-07-21 21:14:06,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:14:06,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:14:06,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859832220] [2020-07-21 21:14:06,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:14:06,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:14:06,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:14:06,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:06,578 INFO L87 Difference]: Start difference. First operand 57814 states and 97346 transitions. Second operand 3 states. [2020-07-21 21:14:09,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:09,853 INFO L93 Difference]: Finished difference Result 152690 states and 257010 transitions. [2020-07-21 21:14:09,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:14:09,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 442 [2020-07-21 21:14:09,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:10,035 INFO L225 Difference]: With dead ends: 152690 [2020-07-21 21:14:10,036 INFO L226 Difference]: Without dead ends: 96256 [2020-07-21 21:14:10,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:10,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96256 states. [2020-07-21 21:14:12,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96256 to 95968. [2020-07-21 21:14:12,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95968 states. [2020-07-21 21:14:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95968 states to 95968 states and 161483 transitions. [2020-07-21 21:14:12,456 INFO L78 Accepts]: Start accepts. Automaton has 95968 states and 161483 transitions. Word has length 442 [2020-07-21 21:14:12,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:14:12,457 INFO L479 AbstractCegarLoop]: Abstraction has 95968 states and 161483 transitions. [2020-07-21 21:14:12,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:14:12,457 INFO L276 IsEmpty]: Start isEmpty. Operand 95968 states and 161483 transitions. [2020-07-21 21:14:12,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 446 [2020-07-21 21:14:12,488 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:14:12,488 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] [2020-07-21 21:14:12,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:12,697 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:14:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:14:12,698 INFO L82 PathProgramCache]: Analyzing trace with hash -674535386, now seen corresponding path program 1 times [2020-07-21 21:14:12,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:14:12,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468016600] [2020-07-21 21:14:12,699 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:13,107 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:14:13,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:14:13,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 21:14:13,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:14:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:14:13,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:14:13,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468016600] [2020-07-21 21:14:13,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:14:13,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:14:13,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268256462] [2020-07-21 21:14:13,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:14:13,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:14:13,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:14:13,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:14:13,258 INFO L87 Difference]: Start difference. First operand 95968 states and 161483 transitions. Second operand 4 states. [2020-07-21 21:14:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:15,185 INFO L93 Difference]: Finished difference Result 175647 states and 295469 transitions. [2020-07-21 21:14:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:14:15,185 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 445 [2020-07-21 21:14:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:15,310 INFO L225 Difference]: With dead ends: 175647 [2020-07-21 21:14:15,310 INFO L226 Difference]: Without dead ends: 83725 [2020-07-21 21:14:15,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:14:15,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83725 states. [2020-07-21 21:14:19,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83725 to 81526. [2020-07-21 21:14:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81526 states. [2020-07-21 21:14:19,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81526 states to 81526 states and 137135 transitions. [2020-07-21 21:14:19,901 INFO L78 Accepts]: Start accepts. Automaton has 81526 states and 137135 transitions. Word has length 445 [2020-07-21 21:14:19,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:14:19,901 INFO L479 AbstractCegarLoop]: Abstraction has 81526 states and 137135 transitions. [2020-07-21 21:14:19,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:14:19,901 INFO L276 IsEmpty]: Start isEmpty. Operand 81526 states and 137135 transitions. [2020-07-21 21:14:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-21 21:14:19,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:14:19,911 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] [2020-07-21 21:14:20,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:20,126 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:14:20,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:14:20,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1936030092, now seen corresponding path program 1 times [2020-07-21 21:14:20,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:14:20,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189075439] [2020-07-21 21:14:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:20,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:14:20,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:14:20,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1760 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:14:20,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:14:20,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:14:20,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:14:20,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189075439] [2020-07-21 21:14:20,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:14:20,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:14:20,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670839197] [2020-07-21 21:14:20,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:14:20,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:14:20,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:14:20,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:20,644 INFO L87 Difference]: Start difference. First operand 81526 states and 137135 transitions. Second operand 3 states. [2020-07-21 21:14:22,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:22,957 INFO L93 Difference]: Finished difference Result 194276 states and 326661 transitions. [2020-07-21 21:14:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:14:22,958 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 449 [2020-07-21 21:14:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:23,126 INFO L225 Difference]: With dead ends: 194276 [2020-07-21 21:14:23,127 INFO L226 Difference]: Without dead ends: 117684 [2020-07-21 21:14:23,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:14:23,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117684 states. [2020-07-21 21:14:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117684 to 116636. [2020-07-21 21:14:28,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116636 states. [2020-07-21 21:14:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116636 states to 116636 states and 196051 transitions. [2020-07-21 21:14:28,304 INFO L78 Accepts]: Start accepts. Automaton has 116636 states and 196051 transitions. Word has length 449 [2020-07-21 21:14:28,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:14:28,305 INFO L479 AbstractCegarLoop]: Abstraction has 116636 states and 196051 transitions. [2020-07-21 21:14:28,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:14:28,305 INFO L276 IsEmpty]: Start isEmpty. Operand 116636 states and 196051 transitions. [2020-07-21 21:14:28,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 21:14:28,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:14:28,314 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] [2020-07-21 21:14:28,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:28,515 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:14:28,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:14:28,516 INFO L82 PathProgramCache]: Analyzing trace with hash -2074476586, now seen corresponding path program 1 times [2020-07-21 21:14:28,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:14:28,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120621908] [2020-07-21 21:14:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:28,907 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:14:28,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:14:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:14:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:14:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:14:29,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:14:29,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120621908] [2020-07-21 21:14:29,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:14:29,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:14:29,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726385378] [2020-07-21 21:14:29,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:14:29,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:14:29,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:14:29,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:14:29,133 INFO L87 Difference]: Start difference. First operand 116636 states and 196051 transitions. Second operand 5 states. [2020-07-21 21:14:39,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:39,268 INFO L93 Difference]: Finished difference Result 395470 states and 664489 transitions. [2020-07-21 21:14:39,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 21:14:39,269 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 450 [2020-07-21 21:14:39,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:39,635 INFO L225 Difference]: With dead ends: 395470 [2020-07-21 21:14:39,636 INFO L226 Difference]: Without dead ends: 283732 [2020-07-21 21:14:39,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-21 21:14:39,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283732 states. [2020-07-21 21:14:45,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283732 to 224640. [2020-07-21 21:14:45,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224640 states. [2020-07-21 21:14:45,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224640 states to 224640 states and 377501 transitions. [2020-07-21 21:14:45,723 INFO L78 Accepts]: Start accepts. Automaton has 224640 states and 377501 transitions. Word has length 450 [2020-07-21 21:14:45,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:14:45,724 INFO L479 AbstractCegarLoop]: Abstraction has 224640 states and 377501 transitions. [2020-07-21 21:14:45,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:14:45,724 INFO L276 IsEmpty]: Start isEmpty. Operand 224640 states and 377501 transitions. [2020-07-21 21:14:45,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 21:14:45,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:14:45,738 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] [2020-07-21 21:14:45,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:45,939 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:14:45,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:14:45,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1823827838, now seen corresponding path program 1 times [2020-07-21 21:14:45,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:14:45,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812818918] [2020-07-21 21:14:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:14:46,348 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:14:46,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:14:46,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 1764 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 21:14:46,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:14:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:14:46,472 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:14:46,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812818918] [2020-07-21 21:14:46,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:14:46,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:14:46,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566939767] [2020-07-21 21:14:46,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:14:46,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:14:46,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:14:46,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:14:46,475 INFO L87 Difference]: Start difference. First operand 224640 states and 377501 transitions. Second operand 4 states. [2020-07-21 21:14:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:14:54,201 INFO L93 Difference]: Finished difference Result 439971 states and 739438 transitions. [2020-07-21 21:14:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:14:54,202 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 450 [2020-07-21 21:14:54,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:14:54,585 INFO L225 Difference]: With dead ends: 439971 [2020-07-21 21:14:54,585 INFO L226 Difference]: Without dead ends: 223350 [2020-07-21 21:14:55,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:14:55,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223350 states. [2020-07-21 21:15:06,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223350 to 218827. [2020-07-21 21:15:06,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218827 states. [2020-07-21 21:15:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218827 states to 218827 states and 367849 transitions. [2020-07-21 21:15:06,741 INFO L78 Accepts]: Start accepts. Automaton has 218827 states and 367849 transitions. Word has length 450 [2020-07-21 21:15:06,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:15:06,741 INFO L479 AbstractCegarLoop]: Abstraction has 218827 states and 367849 transitions. [2020-07-21 21:15:06,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:15:06,742 INFO L276 IsEmpty]: Start isEmpty. Operand 218827 states and 367849 transitions. [2020-07-21 21:15:06,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-07-21 21:15:06,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:15:06,751 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] [2020-07-21 21:15:06,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:06,952 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:15:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:15:06,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1490879813, now seen corresponding path program 1 times [2020-07-21 21:15:06,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:15:06,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401038966] [2020-07-21 21:15:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:07,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:15:07,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:15:07,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1766 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 21:15:07,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:15:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:15:07,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:15:07,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401038966] [2020-07-21 21:15:07,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:15:07,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:15:07,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85633601] [2020-07-21 21:15:07,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:15:07,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:15:07,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:15:07,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:15:07,466 INFO L87 Difference]: Start difference. First operand 218827 states and 367849 transitions. Second operand 4 states. [2020-07-21 21:15:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:15:16,433 INFO L93 Difference]: Finished difference Result 435460 states and 731952 transitions. [2020-07-21 21:15:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:15:16,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 452 [2020-07-21 21:15:16,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:15:16,765 INFO L225 Difference]: With dead ends: 435460 [2020-07-21 21:15:16,765 INFO L226 Difference]: Without dead ends: 217537 [2020-07-21 21:15:16,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:15:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217537 states. [2020-07-21 21:15:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217537 to 217537. [2020-07-21 21:15:22,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217537 states. [2020-07-21 21:15:22,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217537 states to 217537 states and 365659 transitions. [2020-07-21 21:15:22,661 INFO L78 Accepts]: Start accepts. Automaton has 217537 states and 365659 transitions. Word has length 452 [2020-07-21 21:15:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:15:22,662 INFO L479 AbstractCegarLoop]: Abstraction has 217537 states and 365659 transitions. [2020-07-21 21:15:22,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:15:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand 217537 states and 365659 transitions. [2020-07-21 21:15:22,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2020-07-21 21:15:22,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:15:22,670 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] [2020-07-21 21:15:22,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:22,871 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:15:22,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:15:22,872 INFO L82 PathProgramCache]: Analyzing trace with hash 197088704, now seen corresponding path program 1 times [2020-07-21 21:15:22,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:15:22,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923460625] [2020-07-21 21:15:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:23,404 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:15:23,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:15:23,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 3098 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:15:23,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:15:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:15:23,494 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:15:23,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923460625] [2020-07-21 21:15:23,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:15:23,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:15:23,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314467141] [2020-07-21 21:15:23,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:15:23,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:15:23,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:15:23,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:15:23,495 INFO L87 Difference]: Start difference. First operand 217537 states and 365659 transitions. Second operand 3 states. [2020-07-21 21:15:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:15:37,442 INFO L93 Difference]: Finished difference Result 581185 states and 975685 transitions. [2020-07-21 21:15:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:15:37,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 455 [2020-07-21 21:15:37,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:15:38,039 INFO L225 Difference]: With dead ends: 581185 [2020-07-21 21:15:38,039 INFO L226 Difference]: Without dead ends: 364538 [2020-07-21 21:15:38,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 453 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:15:38,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364538 states. [2020-07-21 21:15:50,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364538 to 364534. [2020-07-21 21:15:50,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 364534 states. [2020-07-21 21:15:51,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364534 states to 364534 states and 610824 transitions. [2020-07-21 21:15:51,203 INFO L78 Accepts]: Start accepts. Automaton has 364534 states and 610824 transitions. Word has length 455 [2020-07-21 21:15:51,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:15:51,204 INFO L479 AbstractCegarLoop]: Abstraction has 364534 states and 610824 transitions. [2020-07-21 21:15:51,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:15:51,204 INFO L276 IsEmpty]: Start isEmpty. Operand 364534 states and 610824 transitions. [2020-07-21 21:15:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-21 21:15:51,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:15:51,218 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] [2020-07-21 21:15:51,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:51,431 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:15:51,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:15:51,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1535114912, now seen corresponding path program 1 times [2020-07-21 21:15:51,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:15:51,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735865132] [2020-07-21 21:15:51,433 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:15:51,972 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:15:51,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:15:51,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 3126 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:15:51,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:15:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:15:52,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:15:52,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735865132] [2020-07-21 21:15:52,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:15:52,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:15:52,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369775360] [2020-07-21 21:15:52,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:15:52,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:15:52,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:15:52,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:15:52,105 INFO L87 Difference]: Start difference. First operand 364534 states and 610824 transitions. Second operand 3 states. [2020-07-21 21:16:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:16:07,823 INFO L93 Difference]: Finished difference Result 789214 states and 1322048 transitions. [2020-07-21 21:16:07,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:16:07,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 469 [2020-07-21 21:16:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:16:08,471 INFO L225 Difference]: With dead ends: 789214 [2020-07-21 21:16:08,471 INFO L226 Difference]: Without dead ends: 425570 [2020-07-21 21:16:08,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:16:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425570 states. [2020-07-21 21:16:26,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425570 to 425566. [2020-07-21 21:16:26,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425566 states. [2020-07-21 21:16:28,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425566 states to 425566 states and 712465 transitions. [2020-07-21 21:16:28,613 INFO L78 Accepts]: Start accepts. Automaton has 425566 states and 712465 transitions. Word has length 469 [2020-07-21 21:16:28,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:16:28,613 INFO L479 AbstractCegarLoop]: Abstraction has 425566 states and 712465 transitions. [2020-07-21 21:16:28,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:16:28,613 INFO L276 IsEmpty]: Start isEmpty. Operand 425566 states and 712465 transitions. [2020-07-21 21:16:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 21:16:28,626 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:16:28,626 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] [2020-07-21 21:16:28,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:16:28,827 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:16:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:16:28,829 INFO L82 PathProgramCache]: Analyzing trace with hash -205147444, now seen corresponding path program 1 times [2020-07-21 21:16:28,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:16:28,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750682130] [2020-07-21 21:16:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:16:29,221 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:16:29,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:16:29,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:16:29,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:16:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:16:29,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:16:29,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750682130] [2020-07-21 21:16:29,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:16:29,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:16:29,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721435204] [2020-07-21 21:16:29,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:16:29,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:16:29,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:16:29,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:16:29,390 INFO L87 Difference]: Start difference. First operand 425566 states and 712465 transitions. Second operand 3 states. [2020-07-21 21:16:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:16:49,681 INFO L93 Difference]: Finished difference Result 972079 states and 1627730 transitions. [2020-07-21 21:16:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:16:49,682 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 474 [2020-07-21 21:16:49,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:16:50,654 INFO L225 Difference]: With dead ends: 972079 [2020-07-21 21:16:50,654 INFO L226 Difference]: Without dead ends: 608126 [2020-07-21 21:16:50,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:16:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608126 states. [2020-07-21 21:17:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608126 to 608122. [2020-07-21 21:17:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608122 states. [2020-07-21 21:17:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608122 states to 608122 states and 1016842 transitions. [2020-07-21 21:17:28,429 INFO L78 Accepts]: Start accepts. Automaton has 608122 states and 1016842 transitions. Word has length 474 [2020-07-21 21:17:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:17:28,430 INFO L479 AbstractCegarLoop]: Abstraction has 608122 states and 1016842 transitions. [2020-07-21 21:17:28,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:17:28,430 INFO L276 IsEmpty]: Start isEmpty. Operand 608122 states and 1016842 transitions. [2020-07-21 21:17:28,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 21:17:28,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:17:28,445 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] [2020-07-21 21:17:28,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:17:28,659 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:17:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:17:28,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1930462411, now seen corresponding path program 1 times [2020-07-21 21:17:28,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:17:28,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370961008] [2020-07-21 21:17:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:17:29,054 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:17:29,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:17:29,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:17:29,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:17:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:17:29,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:17:29,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370961008] [2020-07-21 21:17:29,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:17:29,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:17:29,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373535769] [2020-07-21 21:17:29,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:17:29,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:17:29,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:17:29,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:17:29,177 INFO L87 Difference]: Start difference. First operand 608122 states and 1016842 transitions. Second operand 3 states. [2020-07-21 21:18:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:18:12,000 INFO L93 Difference]: Finished difference Result 1520446 states and 2542669 transitions. [2020-07-21 21:18:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:18:12,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 21:18:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:18:13,609 INFO L225 Difference]: With dead ends: 1520446 [2020-07-21 21:18:13,609 INFO L226 Difference]: Without dead ends: 975671 [2020-07-21 21:18:14,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:18:14,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975671 states. [2020-07-21 21:18:58,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975671 to 974049. [2020-07-21 21:18:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 974049 states. [2020-07-21 21:19:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974049 states to 974049 states and 1628744 transitions. [2020-07-21 21:19:00,700 INFO L78 Accepts]: Start accepts. Automaton has 974049 states and 1628744 transitions. Word has length 478 [2020-07-21 21:19:00,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:19:00,700 INFO L479 AbstractCegarLoop]: Abstraction has 974049 states and 1628744 transitions. [2020-07-21 21:19:00,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:19:00,700 INFO L276 IsEmpty]: Start isEmpty. Operand 974049 states and 1628744 transitions. [2020-07-21 21:19:00,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 21:19:00,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:19:00,719 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] [2020-07-21 21:19:00,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:19:00,920 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:19:00,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:19:00,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2019935435, now seen corresponding path program 1 times [2020-07-21 21:19:00,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:19:00,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273505549] [2020-07-21 21:19:00,922 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:19:01,315 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:19:01,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:19:01,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:19:01,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:19:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 21:19:01,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:19:01,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273505549] [2020-07-21 21:19:01,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:19:01,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:19:01,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251671116] [2020-07-21 21:19:01,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:19:01,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:19:01,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:19:01,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:19:01,543 INFO L87 Difference]: Start difference. First operand 974049 states and 1628744 transitions. Second operand 4 states. [2020-07-21 21:20:25,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:20:25,165 INFO L93 Difference]: Finished difference Result 2890720 states and 4835476 transitions. [2020-07-21 21:20:25,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:20:25,165 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2020-07-21 21:20:25,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:20:28,430 INFO L225 Difference]: With dead ends: 2890720 [2020-07-21 21:20:28,430 INFO L226 Difference]: Without dead ends: 1916746 [2020-07-21 21:20:45,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:20:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916746 states.