/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:27:51,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:27:51,539 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:27:51,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:27:51,552 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:27:51,553 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:27:51,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:27:51,556 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:27:51,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:27:51,559 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:27:51,560 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:27:51,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:27:51,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:27:51,562 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:27:51,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:27:51,565 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:27:51,565 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:27:51,566 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:27:51,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:27:51,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:27:51,572 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:27:51,573 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:27:51,574 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:27:51,575 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:27:51,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 17:27:51,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:27:51,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:27:51,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:27:51,588 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 17:27:51,603 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:27:51,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:27:51,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:27:51,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:27:51,607 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:27:51,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:27:51,608 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:27:51,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:27:51,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:27:51,609 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:27:51,609 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:27:51,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:27:51,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:27:51,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:27:51,610 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:27:51,610 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:27:51,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:27:51,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:27:51,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:27:51,611 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:27:51,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:27:51,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:27:51,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:27:51,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:27:51,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:27:51,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:27:51,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:51,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:27:51,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:27:51,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 17:27:51,969 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:27:51,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:27:51,996 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:27:51,998 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:27:51,998 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:27:52,002 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 17:27:52,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27d2524f4/3784d5b1669e4f368b625f9eb0c33b4e/FLAGcade31bca [2020-07-21 17:27:52,767 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:27:52,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 17:27:52,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27d2524f4/3784d5b1669e4f368b625f9eb0c33b4e/FLAGcade31bca [2020-07-21 17:27:52,918 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27d2524f4/3784d5b1669e4f368b625f9eb0c33b4e [2020-07-21 17:27:52,928 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:27:52,932 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:27:52,933 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:27:52,933 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:27:52,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:27:52,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:27:52" (1/1) ... [2020-07-21 17:27:52,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79a47a31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:52, skipping insertion in model container [2020-07-21 17:27:52,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:27:52" (1/1) ... [2020-07-21 17:27:52,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:27:53,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:27:54,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:27:54,170 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:27:54,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:27:54,592 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:27:54,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:54 WrapperNode [2020-07-21 17:27:54,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:27:54,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:27:54,594 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:27:54,594 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:27:54,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:54" (1/1) ... [2020-07-21 17:27:54,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:54" (1/1) ... [2020-07-21 17:27:54,644 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:54" (1/1) ... [2020-07-21 17:27:54,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:54" (1/1) ... [2020-07-21 17:27:54,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:54" (1/1) ... [2020-07-21 17:27:54,792 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:54" (1/1) ... [2020-07-21 17:27:54,801 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:54" (1/1) ... [2020-07-21 17:27:54,815 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:27:54,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:27:54,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:27:54,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:27:54,817 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:27:54,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:27:54,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:27:54,906 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:27:54,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:27:54,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:27:54,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 17:27:54,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 17:27:54,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 17:27:54,907 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 17:27:54,908 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:27:54,908 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:27:54,908 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 17:27:54,908 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 17:27:54,908 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 17:27:54,909 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 17:27:54,909 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 17:27:54,909 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 17:27:54,909 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 17:27:54,910 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 17:27:54,910 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:27:54,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:27:54,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:27:57,809 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:27:57,809 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:27:57,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:27:57 BoogieIcfgContainer [2020-07-21 17:27:57,826 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:27:57,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:27:57,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:27:57,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:27:57,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:27:52" (1/3) ... [2020-07-21 17:27:57,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aaeb067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:27:57, skipping insertion in model container [2020-07-21 17:27:57,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:27:54" (2/3) ... [2020-07-21 17:27:57,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aaeb067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:27:57, skipping insertion in model container [2020-07-21 17:27:57,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:27:57" (3/3) ... [2020-07-21 17:27:57,840 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 17:27:57,852 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:27:57,868 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:27:57,884 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:27:57,924 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:27:57,924 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:27:57,924 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:27:57,924 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:27:57,924 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:27:57,924 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:27:57,925 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:27:57,925 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:27:57,964 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-07-21 17:27:58,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:27:58,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:58,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:58,011 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:58,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:58,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-07-21 17:27:58,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:58,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389170845] [2020-07-21 17:27:58,028 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:58,488 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:58,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:58,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 1478 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:27:58,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:27:58,747 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:58,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389170845] [2020-07-21 17:27:58,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:58,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:58,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434357685] [2020-07-21 17:27:58,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:58,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:58,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:58,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:58,775 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 3 states. [2020-07-21 17:27:59,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:27:59,046 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-07-21 17:27:59,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:27:59,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 17:27:59,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:27:59,076 INFO L225 Difference]: With dead ends: 1527 [2020-07-21 17:27:59,076 INFO L226 Difference]: Without dead ends: 1311 [2020-07-21 17:27:59,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:59,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-07-21 17:27:59,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-07-21 17:27:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-07-21 17:27:59,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-07-21 17:27:59,227 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-07-21 17:27:59,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:27:59,233 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-07-21 17:27:59,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:27:59,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-07-21 17:27:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:27:59,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:27:59,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:27:59,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:59,458 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:27:59,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:27:59,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-07-21 17:27:59,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:27:59,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579676727] [2020-07-21 17:27:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:27:59,762 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:27:59,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:27:59,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:27:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:27:59,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:27:59,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:27:59,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579676727] [2020-07-21 17:27:59,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:27:59,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:27:59,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561356282] [2020-07-21 17:27:59,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:27:59,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:27:59,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:27:59,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:27:59,918 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 3 states. [2020-07-21 17:28:00,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:00,134 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-07-21 17:28:00,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:00,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 17:28:00,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:00,148 INFO L225 Difference]: With dead ends: 2683 [2020-07-21 17:28:00,149 INFO L226 Difference]: Without dead ends: 2301 [2020-07-21 17:28:00,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:00,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-07-21 17:28:00,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-07-21 17:28:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-07-21 17:28:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-07-21 17:28:00,233 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-07-21 17:28:00,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:00,234 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-07-21 17:28:00,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:00,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-07-21 17:28:00,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:28:00,243 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:00,243 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:00,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:00,458 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:00,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:00,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-07-21 17:28:00,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:00,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382627843] [2020-07-21 17:28:00,460 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:00,798 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:28:00,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:00,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 1480 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:28:00,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:00,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:00,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382627843] [2020-07-21 17:28:00,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:00,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:00,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869491957] [2020-07-21 17:28:00,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:00,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:00,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:00,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:00,912 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 3 states. [2020-07-21 17:28:01,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:01,215 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-07-21 17:28:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:01,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 17:28:01,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:01,238 INFO L225 Difference]: With dead ends: 4867 [2020-07-21 17:28:01,238 INFO L226 Difference]: Without dead ends: 4201 [2020-07-21 17:28:01,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:01,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-07-21 17:28:01,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-07-21 17:28:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-07-21 17:28:01,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-07-21 17:28:01,444 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-07-21 17:28:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:01,444 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-07-21 17:28:01,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-07-21 17:28:01,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 17:28:01,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:01,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:01,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:01,664 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:01,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-07-21 17:28:01,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:01,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1879270434] [2020-07-21 17:28:01,666 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:02,038 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:02,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:02,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:28:02,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:02,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:02,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1879270434] [2020-07-21 17:28:02,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:02,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:28:02,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265657139] [2020-07-21 17:28:02,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:28:02,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:02,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:28:02,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:28:02,286 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 4 states. [2020-07-21 17:28:02,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:02,820 INFO L93 Difference]: Finished difference Result 12414 states and 19245 transitions. [2020-07-21 17:28:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:28:02,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 17:28:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:02,877 INFO L225 Difference]: With dead ends: 12414 [2020-07-21 17:28:02,877 INFO L226 Difference]: Without dead ends: 8230 [2020-07-21 17:28:02,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:28:02,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2020-07-21 17:28:03,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228. [2020-07-21 17:28:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8228 states. [2020-07-21 17:28:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions. [2020-07-21 17:28:03,397 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330 [2020-07-21 17:28:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:03,398 INFO L479 AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions. [2020-07-21 17:28:03,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:28:03,398 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions. [2020-07-21 17:28:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:28:03,433 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:03,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:03,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:03,649 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:03,650 INFO L82 PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times [2020-07-21 17:28:03,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:03,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367013515] [2020-07-21 17:28:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:04,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:04,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:04,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 2058 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:28:04,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:04,553 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:04,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367013515] [2020-07-21 17:28:04,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:04,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:04,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709821827] [2020-07-21 17:28:04,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:04,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:04,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:04,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:04,557 INFO L87 Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 3 states. [2020-07-21 17:28:05,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:05,208 INFO L93 Difference]: Finished difference Result 24233 states and 37318 transitions. [2020-07-21 17:28:05,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:05,209 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 17:28:05,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:05,288 INFO L225 Difference]: With dead ends: 24233 [2020-07-21 17:28:05,288 INFO L226 Difference]: Without dead ends: 16134 [2020-07-21 17:28:05,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:05,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2020-07-21 17:28:06,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132. [2020-07-21 17:28:06,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16132 states. [2020-07-21 17:28:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions. [2020-07-21 17:28:06,093 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332 [2020-07-21 17:28:06,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:06,094 INFO L479 AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions. [2020-07-21 17:28:06,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:06,094 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions. [2020-07-21 17:28:06,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 17:28:06,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:06,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:06,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:06,342 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:06,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:06,342 INFO L82 PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times [2020-07-21 17:28:06,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:06,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658090627] [2020-07-21 17:28:06,343 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:06,790 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:28:06,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:06,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 1787 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:28:06,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:06,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:06,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658090627] [2020-07-21 17:28:06,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:06,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:06,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130506635] [2020-07-21 17:28:06,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:06,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:06,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:06,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:06,881 INFO L87 Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 3 states. [2020-07-21 17:28:07,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:07,880 INFO L93 Difference]: Finished difference Result 48319 states and 74093 transitions. [2020-07-21 17:28:07,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:07,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 17:28:07,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:07,961 INFO L225 Difference]: With dead ends: 48319 [2020-07-21 17:28:07,961 INFO L226 Difference]: Without dead ends: 32226 [2020-07-21 17:28:08,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:08,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32226 states. [2020-07-21 17:28:08,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32226 to 16146. [2020-07-21 17:28:08,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16146 states. [2020-07-21 17:28:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16146 states to 16146 states and 24758 transitions. [2020-07-21 17:28:08,891 INFO L78 Accepts]: Start accepts. Automaton has 16146 states and 24758 transitions. Word has length 332 [2020-07-21 17:28:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:08,892 INFO L479 AbstractCegarLoop]: Abstraction has 16146 states and 24758 transitions. [2020-07-21 17:28:08,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:08,892 INFO L276 IsEmpty]: Start isEmpty. Operand 16146 states and 24758 transitions. [2020-07-21 17:28:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 17:28:08,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:08,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:09,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:09,139 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:09,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:09,140 INFO L82 PathProgramCache]: Analyzing trace with hash -2080345228, now seen corresponding path program 1 times [2020-07-21 17:28:09,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:09,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377197033] [2020-07-21 17:28:09,141 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:09,611 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:09,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:09,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 2060 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:28:09,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:09,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:09,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377197033] [2020-07-21 17:28:09,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:09,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:09,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184115151] [2020-07-21 17:28:09,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:09,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:09,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:09,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:09,696 INFO L87 Difference]: Start difference. First operand 16146 states and 24758 transitions. Second operand 3 states. [2020-07-21 17:28:10,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:10,522 INFO L93 Difference]: Finished difference Result 48341 states and 74123 transitions. [2020-07-21 17:28:10,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:10,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 17:28:10,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:10,594 INFO L225 Difference]: With dead ends: 48341 [2020-07-21 17:28:10,594 INFO L226 Difference]: Without dead ends: 32249 [2020-07-21 17:28:10,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32249 states. [2020-07-21 17:28:12,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32249 to 16169. [2020-07-21 17:28:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16169 states. [2020-07-21 17:28:12,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16169 states to 16169 states and 24790 transitions. [2020-07-21 17:28:12,314 INFO L78 Accepts]: Start accepts. Automaton has 16169 states and 24790 transitions. Word has length 333 [2020-07-21 17:28:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:12,314 INFO L479 AbstractCegarLoop]: Abstraction has 16169 states and 24790 transitions. [2020-07-21 17:28:12,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:12,315 INFO L276 IsEmpty]: Start isEmpty. Operand 16169 states and 24790 transitions. [2020-07-21 17:28:12,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:28:12,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:12,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:12,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:12,561 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:12,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1155788840, now seen corresponding path program 1 times [2020-07-21 17:28:12,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:12,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245156010] [2020-07-21 17:28:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:12,905 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:12,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:12,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 2061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:28:12,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:13,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:13,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245156010] [2020-07-21 17:28:13,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:13,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:13,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777709591] [2020-07-21 17:28:13,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:13,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:13,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:13,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:13,124 INFO L87 Difference]: Start difference. First operand 16169 states and 24790 transitions. Second operand 3 states. [2020-07-21 17:28:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:13,754 INFO L93 Difference]: Finished difference Result 45818 states and 70099 transitions. [2020-07-21 17:28:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:13,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-21 17:28:13,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:13,813 INFO L225 Difference]: With dead ends: 45818 [2020-07-21 17:28:13,813 INFO L226 Difference]: Without dead ends: 29894 [2020-07-21 17:28:13,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29894 states. [2020-07-21 17:28:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29894 to 29892. [2020-07-21 17:28:14,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29892 states. [2020-07-21 17:28:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29892 states to 29892 states and 45506 transitions. [2020-07-21 17:28:14,986 INFO L78 Accepts]: Start accepts. Automaton has 29892 states and 45506 transitions. Word has length 334 [2020-07-21 17:28:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:14,987 INFO L479 AbstractCegarLoop]: Abstraction has 29892 states and 45506 transitions. [2020-07-21 17:28:14,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 29892 states and 45506 transitions. [2020-07-21 17:28:15,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 17:28:15,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:15,049 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] [2020-07-21 17:28:15,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:15,262 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:15,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:15,263 INFO L82 PathProgramCache]: Analyzing trace with hash -942652091, now seen corresponding path program 1 times [2020-07-21 17:28:15,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:15,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973524428] [2020-07-21 17:28:15,265 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:15,566 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:28:15,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:15,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 1789 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:28:15,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:15,659 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:15,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973524428] [2020-07-21 17:28:15,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:15,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:28:15,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906983790] [2020-07-21 17:28:15,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:28:15,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:15,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:28:15,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:28:15,661 INFO L87 Difference]: Start difference. First operand 29892 states and 45506 transitions. Second operand 4 states. [2020-07-21 17:28:16,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:16,974 INFO L93 Difference]: Finished difference Result 86824 states and 131975 transitions. [2020-07-21 17:28:16,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:28:16,975 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 17:28:16,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:17,056 INFO L225 Difference]: With dead ends: 86824 [2020-07-21 17:28:17,057 INFO L226 Difference]: Without dead ends: 57472 [2020-07-21 17:28:17,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:28:17,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57472 states. [2020-07-21 17:28:19,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57472 to 30127. [2020-07-21 17:28:19,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30127 states. [2020-07-21 17:28:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30127 states to 30127 states and 45894 transitions. [2020-07-21 17:28:19,227 INFO L78 Accepts]: Start accepts. Automaton has 30127 states and 45894 transitions. Word has length 334 [2020-07-21 17:28:19,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:19,227 INFO L479 AbstractCegarLoop]: Abstraction has 30127 states and 45894 transitions. [2020-07-21 17:28:19,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:28:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 30127 states and 45894 transitions. [2020-07-21 17:28:19,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 17:28:19,251 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:19,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:19,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:19,463 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:19,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1599465463, now seen corresponding path program 1 times [2020-07-21 17:28:19,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:19,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434129897] [2020-07-21 17:28:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:19,768 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:28:19,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:19,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 1791 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:28:19,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:20,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:20,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434129897] [2020-07-21 17:28:20,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:20,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:20,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178725117] [2020-07-21 17:28:20,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:20,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:20,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:20,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:20,009 INFO L87 Difference]: Start difference. First operand 30127 states and 45894 transitions. Second operand 3 states. [2020-07-21 17:28:21,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:21,483 INFO L93 Difference]: Finished difference Result 88819 states and 134983 transitions. [2020-07-21 17:28:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:21,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 17:28:21,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:21,550 INFO L225 Difference]: With dead ends: 88819 [2020-07-21 17:28:21,550 INFO L226 Difference]: Without dead ends: 59480 [2020-07-21 17:28:21,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:21,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59480 states. [2020-07-21 17:28:22,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59480 to 30224. [2020-07-21 17:28:22,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30224 states. [2020-07-21 17:28:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30224 states to 30224 states and 46020 transitions. [2020-07-21 17:28:22,647 INFO L78 Accepts]: Start accepts. Automaton has 30224 states and 46020 transitions. Word has length 336 [2020-07-21 17:28:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:22,647 INFO L479 AbstractCegarLoop]: Abstraction has 30224 states and 46020 transitions. [2020-07-21 17:28:22,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 30224 states and 46020 transitions. [2020-07-21 17:28:22,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 17:28:22,675 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:22,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:22,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:22,891 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:22,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:22,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1523242626, now seen corresponding path program 1 times [2020-07-21 17:28:22,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:22,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839738869] [2020-07-21 17:28:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:23,235 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:23,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:23,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:28:23,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:23,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:23,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839738869] [2020-07-21 17:28:23,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:23,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 17:28:23,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633532016] [2020-07-21 17:28:23,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 17:28:23,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:23,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 17:28:23,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 17:28:23,539 INFO L87 Difference]: Start difference. First operand 30224 states and 46020 transitions. Second operand 8 states. [2020-07-21 17:28:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:28,375 INFO L93 Difference]: Finished difference Result 98226 states and 151920 transitions. [2020-07-21 17:28:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 17:28:28,376 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 336 [2020-07-21 17:28:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:28,450 INFO L225 Difference]: With dead ends: 98226 [2020-07-21 17:28:28,450 INFO L226 Difference]: Without dead ends: 69982 [2020-07-21 17:28:28,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 17:28:28,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69982 states. [2020-07-21 17:28:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69982 to 42812. [2020-07-21 17:28:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42812 states. [2020-07-21 17:28:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42812 states to 42812 states and 64632 transitions. [2020-07-21 17:28:30,225 INFO L78 Accepts]: Start accepts. Automaton has 42812 states and 64632 transitions. Word has length 336 [2020-07-21 17:28:30,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:30,225 INFO L479 AbstractCegarLoop]: Abstraction has 42812 states and 64632 transitions. [2020-07-21 17:28:30,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 17:28:30,225 INFO L276 IsEmpty]: Start isEmpty. Operand 42812 states and 64632 transitions. [2020-07-21 17:28:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 17:28:30,258 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:30,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:30,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:30,471 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:30,472 INFO L82 PathProgramCache]: Analyzing trace with hash 487374232, now seen corresponding path program 1 times [2020-07-21 17:28:30,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:30,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763216713] [2020-07-21 17:28:30,473 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:30,830 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:30,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:28:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:30,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:30,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:30,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763216713] [2020-07-21 17:28:30,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:30,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:30,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412722525] [2020-07-21 17:28:30,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:30,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:30,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:30,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:30,945 INFO L87 Difference]: Start difference. First operand 42812 states and 64632 transitions. Second operand 3 states. [2020-07-21 17:28:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:34,904 INFO L93 Difference]: Finished difference Result 100782 states and 152550 transitions. [2020-07-21 17:28:34,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:34,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 17:28:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:34,958 INFO L225 Difference]: With dead ends: 100782 [2020-07-21 17:28:34,958 INFO L226 Difference]: Without dead ends: 59846 [2020-07-21 17:28:34,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59846 states. [2020-07-21 17:28:37,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59846 to 49664. [2020-07-21 17:28:37,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49664 states. [2020-07-21 17:28:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49664 states to 49664 states and 75478 transitions. [2020-07-21 17:28:37,183 INFO L78 Accepts]: Start accepts. Automaton has 49664 states and 75478 transitions. Word has length 336 [2020-07-21 17:28:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:37,183 INFO L479 AbstractCegarLoop]: Abstraction has 49664 states and 75478 transitions. [2020-07-21 17:28:37,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 49664 states and 75478 transitions. [2020-07-21 17:28:37,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 17:28:37,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:37,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:37,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:37,432 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:37,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:37,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1371179646, now seen corresponding path program 1 times [2020-07-21 17:28:37,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:37,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121517893] [2020-07-21 17:28:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:37,751 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:28:37,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:37,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 1793 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:28:37,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:37,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:37,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:37,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121517893] [2020-07-21 17:28:37,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:37,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:28:37,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11219386] [2020-07-21 17:28:37,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:28:37,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:37,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:28:37,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:28:37,851 INFO L87 Difference]: Start difference. First operand 49664 states and 75478 transitions. Second operand 4 states. [2020-07-21 17:28:40,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:40,197 INFO L93 Difference]: Finished difference Result 100745 states and 153035 transitions. [2020-07-21 17:28:40,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:28:40,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-21 17:28:40,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:40,248 INFO L225 Difference]: With dead ends: 100745 [2020-07-21 17:28:40,248 INFO L226 Difference]: Without dead ends: 50588 [2020-07-21 17:28:40,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:28:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50588 states. [2020-07-21 17:28:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50588 to 50586. [2020-07-21 17:28:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50586 states. [2020-07-21 17:28:44,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50586 states to 50586 states and 76541 transitions. [2020-07-21 17:28:44,057 INFO L78 Accepts]: Start accepts. Automaton has 50586 states and 76541 transitions. Word has length 337 [2020-07-21 17:28:44,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:44,058 INFO L479 AbstractCegarLoop]: Abstraction has 50586 states and 76541 transitions. [2020-07-21 17:28:44,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:28:44,058 INFO L276 IsEmpty]: Start isEmpty. Operand 50586 states and 76541 transitions. [2020-07-21 17:28:44,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 17:28:44,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:44,082 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 17:28:44,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:44,283 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:44,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:44,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1011511093, now seen corresponding path program 1 times [2020-07-21 17:28:44,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:44,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50958049] [2020-07-21 17:28:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:44,624 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:28:44,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:44,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:28:44,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:44,710 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:44,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50958049] [2020-07-21 17:28:44,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:44,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:44,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014126588] [2020-07-21 17:28:44,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:44,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:44,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:44,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:44,712 INFO L87 Difference]: Start difference. First operand 50586 states and 76541 transitions. Second operand 3 states. [2020-07-21 17:28:48,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:48,077 INFO L93 Difference]: Finished difference Result 128612 states and 195615 transitions. [2020-07-21 17:28:48,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:48,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 17:28:48,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:48,167 INFO L225 Difference]: With dead ends: 128612 [2020-07-21 17:28:48,167 INFO L226 Difference]: Without dead ends: 81108 [2020-07-21 17:28:48,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:48,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81108 states. [2020-07-21 17:28:51,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81108 to 69410. [2020-07-21 17:28:51,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69410 states. [2020-07-21 17:28:51,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69410 states to 69410 states and 106263 transitions. [2020-07-21 17:28:51,489 INFO L78 Accepts]: Start accepts. Automaton has 69410 states and 106263 transitions. Word has length 338 [2020-07-21 17:28:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:28:51,490 INFO L479 AbstractCegarLoop]: Abstraction has 69410 states and 106263 transitions. [2020-07-21 17:28:51,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:28:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 69410 states and 106263 transitions. [2020-07-21 17:28:51,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 17:28:51,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:28:51,519 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:28:51,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:51,725 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:28:51,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:28:51,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1519948111, now seen corresponding path program 1 times [2020-07-21 17:28:51,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:28:51,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099073131] [2020-07-21 17:28:51,727 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:28:52,039 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:28:52,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:28:52,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:28:52,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:28:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:28:52,119 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:28:52,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099073131] [2020-07-21 17:28:52,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:28:52,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:28:52,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458857228] [2020-07-21 17:28:52,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:28:52,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:28:52,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:28:52,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:52,121 INFO L87 Difference]: Start difference. First operand 69410 states and 106263 transitions. Second operand 3 states. [2020-07-21 17:28:59,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:28:59,207 INFO L93 Difference]: Finished difference Result 207217 states and 317065 transitions. [2020-07-21 17:28:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:28:59,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 17:28:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:28:59,368 INFO L225 Difference]: With dead ends: 207217 [2020-07-21 17:28:59,368 INFO L226 Difference]: Without dead ends: 138325 [2020-07-21 17:28:59,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:28:59,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138325 states. [2020-07-21 17:29:03,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138325 to 69473. [2020-07-21 17:29:03,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69473 states. [2020-07-21 17:29:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69473 states to 69473 states and 106338 transitions. [2020-07-21 17:29:03,259 INFO L78 Accepts]: Start accepts. Automaton has 69473 states and 106338 transitions. Word has length 339 [2020-07-21 17:29:03,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:03,259 INFO L479 AbstractCegarLoop]: Abstraction has 69473 states and 106338 transitions. [2020-07-21 17:29:03,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:29:03,260 INFO L276 IsEmpty]: Start isEmpty. Operand 69473 states and 106338 transitions. [2020-07-21 17:29:03,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 17:29:03,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:03,284 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:03,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:03,485 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:03,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1900936775, now seen corresponding path program 1 times [2020-07-21 17:29:03,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:03,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716138548] [2020-07-21 17:29:03,487 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:03,802 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:03,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:03,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 1795 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:29:03,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:03,882 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:03,882 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716138548] [2020-07-21 17:29:03,882 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:03,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:29:03,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561228721] [2020-07-21 17:29:03,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:29:03,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:03,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:29:03,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:29:03,884 INFO L87 Difference]: Start difference. First operand 69473 states and 106338 transitions. Second operand 4 states. [2020-07-21 17:29:08,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:08,614 INFO L93 Difference]: Finished difference Result 140810 states and 215296 transitions. [2020-07-21 17:29:08,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:29:08,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 17:29:08,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:08,693 INFO L225 Difference]: With dead ends: 140810 [2020-07-21 17:29:08,693 INFO L226 Difference]: Without dead ends: 70816 [2020-07-21 17:29:08,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:29:08,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70816 states. [2020-07-21 17:29:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70816 to 70814. [2020-07-21 17:29:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70814 states. [2020-07-21 17:29:12,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70814 states to 70814 states and 107819 transitions. [2020-07-21 17:29:12,344 INFO L78 Accepts]: Start accepts. Automaton has 70814 states and 107819 transitions. Word has length 339 [2020-07-21 17:29:12,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:12,345 INFO L479 AbstractCegarLoop]: Abstraction has 70814 states and 107819 transitions. [2020-07-21 17:29:12,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:29:12,345 INFO L276 IsEmpty]: Start isEmpty. Operand 70814 states and 107819 transitions. [2020-07-21 17:29:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 17:29:12,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:12,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:12,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:12,575 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:12,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:12,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1239581682, now seen corresponding path program 1 times [2020-07-21 17:29:12,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:12,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994836577] [2020-07-21 17:29:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:12,886 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:29:12,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:12,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:29:12,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:12,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:12,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994836577] [2020-07-21 17:29:12,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:12,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:29:12,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648346057] [2020-07-21 17:29:12,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:29:12,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:12,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:29:12,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:29:12,993 INFO L87 Difference]: Start difference. First operand 70814 states and 107819 transitions. Second operand 4 states. [2020-07-21 17:29:21,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:21,664 INFO L93 Difference]: Finished difference Result 210663 states and 320603 transitions. [2020-07-21 17:29:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:29:21,664 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 17:29:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:21,835 INFO L225 Difference]: With dead ends: 210663 [2020-07-21 17:29:21,835 INFO L226 Difference]: Without dead ends: 141194 [2020-07-21 17:29:21,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:29:21,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141194 states. [2020-07-21 17:29:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141194 to 72243. [2020-07-21 17:29:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72243 states. [2020-07-21 17:29:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72243 states to 72243 states and 110028 transitions. [2020-07-21 17:29:26,606 INFO L78 Accepts]: Start accepts. Automaton has 72243 states and 110028 transitions. Word has length 339 [2020-07-21 17:29:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:26,607 INFO L479 AbstractCegarLoop]: Abstraction has 72243 states and 110028 transitions. [2020-07-21 17:29:26,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:29:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 72243 states and 110028 transitions. [2020-07-21 17:29:26,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 17:29:26,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:26,634 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, 1] [2020-07-21 17:29:26,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:26,835 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:26,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:26,835 INFO L82 PathProgramCache]: Analyzing trace with hash 130285857, now seen corresponding path program 1 times [2020-07-21 17:29:26,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:26,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396487181] [2020-07-21 17:29:26,836 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:27,187 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:27,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:27,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 2078 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:29:27,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:27,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:27,491 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:27,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396487181] [2020-07-21 17:29:27,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:27,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:29:27,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53078731] [2020-07-21 17:29:27,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:29:27,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:27,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:29:27,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:29:27,493 INFO L87 Difference]: Start difference. First operand 72243 states and 110028 transitions. Second operand 5 states. [2020-07-21 17:29:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:29:38,217 INFO L93 Difference]: Finished difference Result 177886 states and 273987 transitions. [2020-07-21 17:29:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:29:38,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-07-21 17:29:38,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:29:38,364 INFO L225 Difference]: With dead ends: 177886 [2020-07-21 17:29:38,364 INFO L226 Difference]: Without dead ends: 136404 [2020-07-21 17:29:38,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:29:38,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136404 states. [2020-07-21 17:29:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136404 to 136402. [2020-07-21 17:29:46,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136402 states. [2020-07-21 17:29:46,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136402 states to 136402 states and 207814 transitions. [2020-07-21 17:29:46,535 INFO L78 Accepts]: Start accepts. Automaton has 136402 states and 207814 transitions. Word has length 339 [2020-07-21 17:29:46,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:29:46,536 INFO L479 AbstractCegarLoop]: Abstraction has 136402 states and 207814 transitions. [2020-07-21 17:29:46,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:29:46,536 INFO L276 IsEmpty]: Start isEmpty. Operand 136402 states and 207814 transitions. [2020-07-21 17:29:46,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 17:29:46,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:29:46,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:29:46,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:46,785 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:29:46,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:29:46,785 INFO L82 PathProgramCache]: Analyzing trace with hash 450094822, now seen corresponding path program 1 times [2020-07-21 17:29:46,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:29:46,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069545670] [2020-07-21 17:29:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:29:47,142 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:29:47,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:29:47,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 2079 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:29:47,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:29:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:29:47,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:29:47,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069545670] [2020-07-21 17:29:47,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:29:47,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:29:47,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714522646] [2020-07-21 17:29:47,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:29:47,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:29:47,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:29:47,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:29:47,234 INFO L87 Difference]: Start difference. First operand 136402 states and 207814 transitions. Second operand 4 states. [2020-07-21 17:30:05,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:30:05,384 INFO L93 Difference]: Finished difference Result 402182 states and 612830 transitions. [2020-07-21 17:30:05,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:30:05,385 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 17:30:05,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:30:05,728 INFO L225 Difference]: With dead ends: 402182 [2020-07-21 17:30:05,729 INFO L226 Difference]: Without dead ends: 266329 [2020-07-21 17:30:06,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:30:06,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266329 states. [2020-07-21 17:30:27,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266329 to 266327. [2020-07-21 17:30:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266327 states. [2020-07-21 17:30:28,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266327 states to 266327 states and 404024 transitions. [2020-07-21 17:30:28,259 INFO L78 Accepts]: Start accepts. Automaton has 266327 states and 404024 transitions. Word has length 339 [2020-07-21 17:30:28,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:30:28,259 INFO L479 AbstractCegarLoop]: Abstraction has 266327 states and 404024 transitions. [2020-07-21 17:30:28,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:30:28,260 INFO L276 IsEmpty]: Start isEmpty. Operand 266327 states and 404024 transitions. [2020-07-21 17:30:28,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 17:30:28,361 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:30:28,361 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] [2020-07-21 17:30:28,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:28,562 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:30:28,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:30:28,563 INFO L82 PathProgramCache]: Analyzing trace with hash 666111628, now seen corresponding path program 1 times [2020-07-21 17:30:28,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:30:28,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042245303] [2020-07-21 17:30:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:30:28,923 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:30:28,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:30:28,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:30:28,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:30:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:30:29,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:30:29,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042245303] [2020-07-21 17:30:29,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:30:29,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:30:29,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296498016] [2020-07-21 17:30:29,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:30:29,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:30:29,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:30:29,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:30:29,024 INFO L87 Difference]: Start difference. First operand 266327 states and 404024 transitions. Second operand 3 states. [2020-07-21 17:31:10,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:31:10,480 INFO L93 Difference]: Finished difference Result 783851 states and 1188472 transitions. [2020-07-21 17:31:10,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:31:10,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 17:31:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:31:11,168 INFO L225 Difference]: With dead ends: 783851 [2020-07-21 17:31:11,168 INFO L226 Difference]: Without dead ends: 521094 [2020-07-21 17:31:11,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:31:11,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521094 states. [2020-07-21 17:31:51,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521094 to 521092. [2020-07-21 17:31:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521092 states. [2020-07-21 17:31:53,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521092 states to 521092 states and 786460 transitions. [2020-07-21 17:31:53,111 INFO L78 Accepts]: Start accepts. Automaton has 521092 states and 786460 transitions. Word has length 341 [2020-07-21 17:31:53,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:31:53,112 INFO L479 AbstractCegarLoop]: Abstraction has 521092 states and 786460 transitions. [2020-07-21 17:31:53,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:31:53,112 INFO L276 IsEmpty]: Start isEmpty. Operand 521092 states and 786460 transitions. [2020-07-21 17:31:53,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 17:31:53,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:31:53,326 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] [2020-07-21 17:31:53,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:31:53,527 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:31:53,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:31:53,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1772742823, now seen corresponding path program 1 times [2020-07-21 17:31:53,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:31:53,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708839108] [2020-07-21 17:31:53,529 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:31:53,768 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:31:53,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:31:53,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 1143 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:31:53,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:31:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:31:53,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:31:53,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708839108] [2020-07-21 17:31:53,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:31:53,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:31:53,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475661230] [2020-07-21 17:31:53,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:31:53,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:31:53,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:31:53,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:31:53,826 INFO L87 Difference]: Start difference. First operand 521092 states and 786460 transitions. Second operand 3 states. [2020-07-21 17:33:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:15,371 INFO L93 Difference]: Finished difference Result 1560815 states and 2355122 transitions. [2020-07-21 17:33:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:33:15,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 17:33:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:16,932 INFO L225 Difference]: With dead ends: 1560815 [2020-07-21 17:33:16,932 INFO L226 Difference]: Without dead ends: 1040968 [2020-07-21 17:33:17,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:18,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040968 states. [2020-07-21 17:34:20,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040968 to 521498. [2020-07-21 17:34:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521498 states. [2020-07-21 17:34:21,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521498 states to 521498 states and 786953 transitions. [2020-07-21 17:34:21,457 INFO L78 Accepts]: Start accepts. Automaton has 521498 states and 786953 transitions. Word has length 341 [2020-07-21 17:34:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:34:21,458 INFO L479 AbstractCegarLoop]: Abstraction has 521498 states and 786953 transitions. [2020-07-21 17:34:21,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:34:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 521498 states and 786953 transitions. [2020-07-21 17:34:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 17:34:21,667 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:34:21,667 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] [2020-07-21 17:34:21,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:21,868 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:34:21,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:34:21,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2121253703, now seen corresponding path program 1 times [2020-07-21 17:34:21,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:34:21,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920051225] [2020-07-21 17:34:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:22,221 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:34:22,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:34:22,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 2084 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:34:22,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:34:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:34:22,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:34:22,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920051225] [2020-07-21 17:34:22,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:34:22,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:34:22,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432719065] [2020-07-21 17:34:22,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:34:22,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:34:22,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:34:22,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:34:22,298 INFO L87 Difference]: Start difference. First operand 521498 states and 786953 transitions. Second operand 3 states. [2020-07-21 17:35:47,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:35:47,762 INFO L93 Difference]: Finished difference Result 1561453 states and 2355992 transitions. [2020-07-21 17:35:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:35:47,763 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 17:35:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:35:49,228 INFO L225 Difference]: With dead ends: 1561453 [2020-07-21 17:35:49,229 INFO L226 Difference]: Without dead ends: 1041635 [2020-07-21 17:35:49,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:35:50,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041635 states. [2020-07-21 17:36:55,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041635 to 522165. [2020-07-21 17:36:55,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522165 states. [2020-07-21 17:36:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522165 states to 522165 states and 787881 transitions. [2020-07-21 17:36:56,046 INFO L78 Accepts]: Start accepts. Automaton has 522165 states and 787881 transitions. Word has length 342 [2020-07-21 17:36:56,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:56,047 INFO L479 AbstractCegarLoop]: Abstraction has 522165 states and 787881 transitions. [2020-07-21 17:36:56,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:36:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 522165 states and 787881 transitions. [2020-07-21 17:36:57,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 17:36:57,360 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:57,361 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] [2020-07-21 17:36:57,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:57,567 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:57,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:57,568 INFO L82 PathProgramCache]: Analyzing trace with hash 677550577, now seen corresponding path program 1 times [2020-07-21 17:36:57,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:57,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939791729] [2020-07-21 17:36:57,569 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:57,930 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:36:57,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:57,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 2085 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:36:57,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:58,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:58,063 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:58,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939791729] [2020-07-21 17:36:58,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:58,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:36:58,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858037484] [2020-07-21 17:36:58,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:36:58,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:58,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:36:58,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:36:58,065 INFO L87 Difference]: Start difference. First operand 522165 states and 787881 transitions. Second operand 3 states. [2020-07-21 17:38:20,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:38:20,922 INFO L93 Difference]: Finished difference Result 1478023 states and 2225999 transitions. [2020-07-21 17:38:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:38:20,922 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 343 [2020-07-21 17:38:20,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:38:22,269 INFO L225 Difference]: With dead ends: 1478023 [2020-07-21 17:38:22,269 INFO L226 Difference]: Without dead ends: 962335 [2020-07-21 17:38:22,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:38:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962335 states.