/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:18:56,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:18:56,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:18:57,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:18:57,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:18:57,007 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:18:57,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:18:57,021 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:18:57,022 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:18:57,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:18:57,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:18:57,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:18:57,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:18:57,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:18:57,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:18:57,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:18:57,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:18:57,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:18:57,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:18:57,045 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:18:57,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:18:57,052 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:18:57,053 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:18:57,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:18:57,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:18:57,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:18:57,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:18:57,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:18:57,075 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 02:18:57,104 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:18:57,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:18:57,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:18:57,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:18:57,106 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:18:57,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:18:57,106 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:18:57,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:18:57,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:18:57,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:18:57,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:18:57,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:18:57,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:18:57,108 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:18:57,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:18:57,108 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:18:57,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:18:57,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:18:57,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:18:57,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:18:57,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:18:57,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:18:57,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:18:57,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:18:57,110 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:18:57,110 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:18:57,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:57,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:18:57,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:18:57,110 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 -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 02:18:57,447 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:18:57,464 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:18:57,467 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:18:57,472 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:18:57,475 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:18:57,476 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 02:18:57,542 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41c1fe16e/dac39d468994449381f0e9a1b62bece0/FLAGb9e31b1d7 [2020-07-21 02:18:58,479 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:18:58,480 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 02:18:58,511 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41c1fe16e/dac39d468994449381f0e9a1b62bece0/FLAGb9e31b1d7 [2020-07-21 02:18:58,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41c1fe16e/dac39d468994449381f0e9a1b62bece0 [2020-07-21 02:18:58,966 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:18:58,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:18:58,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:18:58,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:18:58,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:18:58,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:18:58" (1/1) ... [2020-07-21 02:18:58,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2897f06a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:58, skipping insertion in model container [2020-07-21 02:18:58,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:18:58" (1/1) ... [2020-07-21 02:18:58,983 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:18:59,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:19:01,317 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:19:01,337 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:19:02,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:19:02,948 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:19:02,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:19:02 WrapperNode [2020-07-21 02:19:02,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:19:02,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:19:02,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:19:02,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:19:02,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:19:02" (1/1) ... [2020-07-21 02:19:02,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:19:02" (1/1) ... [2020-07-21 02:19:03,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:19:02" (1/1) ... [2020-07-21 02:19:03,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:19:02" (1/1) ... [2020-07-21 02:19:03,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:19:02" (1/1) ... [2020-07-21 02:19:03,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:19:02" (1/1) ... [2020-07-21 02:19:03,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:19:02" (1/1) ... [2020-07-21 02:19:03,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:19:03,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:19:03,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:19:03,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:19:03,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:19:02" (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 02:19:03,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:19:03,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:19:03,345 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:19:03,345 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:19:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:19:03,346 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:19:03,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:19:03,347 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:19:03,347 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:19:03,347 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:19:03,348 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:19:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:19:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:19:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:19:03,349 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:19:03,350 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:19:03,350 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 02:19:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:19:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:19:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:19:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:19:03,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:19:09,103 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:19:09,103 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:19:09,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:19:09 BoogieIcfgContainer [2020-07-21 02:19:09,123 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:19:09,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:19:09,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:19:09,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:19:09,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:18:58" (1/3) ... [2020-07-21 02:19:09,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de4d6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:19:09, skipping insertion in model container [2020-07-21 02:19:09,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:19:02" (2/3) ... [2020-07-21 02:19:09,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@de4d6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:19:09, skipping insertion in model container [2020-07-21 02:19:09,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:19:09" (3/3) ... [2020-07-21 02:19:09,135 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 02:19:09,146 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:19:09,160 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 02:19:09,176 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 02:19:09,215 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:19:09,216 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:19:09,216 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:19:09,216 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:19:09,216 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:19:09,216 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:19:09,216 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:19:09,217 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:19:09,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2020-07-21 02:19:09,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-07-21 02:19:09,325 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:09,326 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] [2020-07-21 02:19:09,327 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:09,334 INFO L82 PathProgramCache]: Analyzing trace with hash -2040294362, now seen corresponding path program 1 times [2020-07-21 02:19:09,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:09,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518284388] [2020-07-21 02:19:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:09,978 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:09,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:09,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 1923 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 02:19:10,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:10,167 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 02:19:10,167 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:10,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518284388] [2020-07-21 02:19:10,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:10,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:10,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560342283] [2020-07-21 02:19:10,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:10,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:10,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:10,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:10,195 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 4 states. [2020-07-21 02:19:10,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:10,614 INFO L93 Difference]: Finished difference Result 3956 states and 6884 transitions. [2020-07-21 02:19:10,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:19:10,616 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 290 [2020-07-21 02:19:10,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:10,663 INFO L225 Difference]: With dead ends: 3956 [2020-07-21 02:19:10,664 INFO L226 Difference]: Without dead ends: 2245 [2020-07-21 02:19:10,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 287 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 02:19:10,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-21 02:19:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-21 02:19:10,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 02:19:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3871 transitions. [2020-07-21 02:19:10,864 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3871 transitions. Word has length 290 [2020-07-21 02:19:10,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:10,867 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3871 transitions. [2020-07-21 02:19:10,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:19:10,867 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3871 transitions. [2020-07-21 02:19:10,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-07-21 02:19:10,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:10,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:11,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:11,097 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:11,098 INFO L82 PathProgramCache]: Analyzing trace with hash -875879150, now seen corresponding path program 1 times [2020-07-21 02:19:11,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:11,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202869128] [2020-07-21 02:19:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:11,582 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:19:11,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:11,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 2292 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:11,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:11,716 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 02:19:11,717 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:11,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202869128] [2020-07-21 02:19:11,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:11,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:11,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827552429] [2020-07-21 02:19:11,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:11,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:11,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:11,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:11,722 INFO L87 Difference]: Start difference. First operand 2245 states and 3871 transitions. Second operand 3 states. [2020-07-21 02:19:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:12,198 INFO L93 Difference]: Finished difference Result 5464 states and 9356 transitions. [2020-07-21 02:19:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:12,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 349 [2020-07-21 02:19:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:12,220 INFO L225 Difference]: With dead ends: 5464 [2020-07-21 02:19:12,221 INFO L226 Difference]: Without dead ends: 3801 [2020-07-21 02:19:12,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 347 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 02:19:12,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2020-07-21 02:19:12,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3797. [2020-07-21 02:19:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3797 states. [2020-07-21 02:19:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6464 transitions. [2020-07-21 02:19:12,349 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6464 transitions. Word has length 349 [2020-07-21 02:19:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:12,350 INFO L479 AbstractCegarLoop]: Abstraction has 3797 states and 6464 transitions. [2020-07-21 02:19:12,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6464 transitions. [2020-07-21 02:19:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-07-21 02:19:12,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:12,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:12,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:12,579 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:12,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:12,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1287553668, now seen corresponding path program 1 times [2020-07-21 02:19:12,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:12,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402748804] [2020-07-21 02:19:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:13,051 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:19:13,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:13,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 2299 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:13,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:13,168 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 02:19:13,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:13,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402748804] [2020-07-21 02:19:13,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:13,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:13,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199042535] [2020-07-21 02:19:13,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:13,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:13,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:13,172 INFO L87 Difference]: Start difference. First operand 3797 states and 6464 transitions. Second operand 3 states. [2020-07-21 02:19:13,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:13,593 INFO L93 Difference]: Finished difference Result 9915 states and 16774 transitions. [2020-07-21 02:19:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:13,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 353 [2020-07-21 02:19:13,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:13,726 INFO L225 Difference]: With dead ends: 9915 [2020-07-21 02:19:13,727 INFO L226 Difference]: Without dead ends: 6767 [2020-07-21 02:19:13,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 351 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 02:19:13,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6767 states. [2020-07-21 02:19:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6767 to 6763. [2020-07-21 02:19:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6763 states. [2020-07-21 02:19:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 11430 transitions. [2020-07-21 02:19:14,048 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 11430 transitions. Word has length 353 [2020-07-21 02:19:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:14,050 INFO L479 AbstractCegarLoop]: Abstraction has 6763 states and 11430 transitions. [2020-07-21 02:19:14,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 11430 transitions. [2020-07-21 02:19:14,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-07-21 02:19:14,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:14,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:14,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:14,285 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:14,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1865003386, now seen corresponding path program 1 times [2020-07-21 02:19:14,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:14,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365657822] [2020-07-21 02:19:14,287 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:14,837 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:19:14,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:14,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 2307 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:14,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:14,940 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 02:19:14,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:14,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365657822] [2020-07-21 02:19:14,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:14,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:14,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281518381] [2020-07-21 02:19:14,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:14,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:14,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:14,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:14,943 INFO L87 Difference]: Start difference. First operand 6763 states and 11430 transitions. Second operand 3 states. [2020-07-21 02:19:15,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:15,443 INFO L93 Difference]: Finished difference Result 18367 states and 30878 transitions. [2020-07-21 02:19:15,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:15,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 357 [2020-07-21 02:19:15,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:15,530 INFO L225 Difference]: With dead ends: 18367 [2020-07-21 02:19:15,531 INFO L226 Difference]: Without dead ends: 12387 [2020-07-21 02:19:15,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 355 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 02:19:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12387 states. [2020-07-21 02:19:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12387 to 12383. [2020-07-21 02:19:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12383 states. [2020-07-21 02:19:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12383 states to 12383 states and 20778 transitions. [2020-07-21 02:19:16,021 INFO L78 Accepts]: Start accepts. Automaton has 12383 states and 20778 transitions. Word has length 357 [2020-07-21 02:19:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:16,022 INFO L479 AbstractCegarLoop]: Abstraction has 12383 states and 20778 transitions. [2020-07-21 02:19:16,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 12383 states and 20778 transitions. [2020-07-21 02:19:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-07-21 02:19:16,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:16,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:16,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:16,276 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:16,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:16,277 INFO L82 PathProgramCache]: Analyzing trace with hash 358005276, now seen corresponding path program 1 times [2020-07-21 02:19:16,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:16,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3291762] [2020-07-21 02:19:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:16,805 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:19:16,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:16,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 2314 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:16,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:16,922 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 02:19:16,923 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:16,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3291762] [2020-07-21 02:19:16,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:16,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:16,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993414385] [2020-07-21 02:19:16,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:16,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:16,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:16,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:16,927 INFO L87 Difference]: Start difference. First operand 12383 states and 20778 transitions. Second operand 3 states. [2020-07-21 02:19:17,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:17,643 INFO L93 Difference]: Finished difference Result 34335 states and 57334 transitions. [2020-07-21 02:19:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:17,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 361 [2020-07-21 02:19:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:17,698 INFO L225 Difference]: With dead ends: 34335 [2020-07-21 02:19:17,699 INFO L226 Difference]: Without dead ends: 23003 [2020-07-21 02:19:17,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 359 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 02:19:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23003 states. [2020-07-21 02:19:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23003 to 22999. [2020-07-21 02:19:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22999 states. [2020-07-21 02:19:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22999 states to 22999 states and 38306 transitions. [2020-07-21 02:19:18,434 INFO L78 Accepts]: Start accepts. Automaton has 22999 states and 38306 transitions. Word has length 361 [2020-07-21 02:19:18,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:18,435 INFO L479 AbstractCegarLoop]: Abstraction has 22999 states and 38306 transitions. [2020-07-21 02:19:18,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:18,435 INFO L276 IsEmpty]: Start isEmpty. Operand 22999 states and 38306 transitions. [2020-07-21 02:19:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-07-21 02:19:18,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:18,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:18,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:18,693 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:18,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2100513250, now seen corresponding path program 1 times [2020-07-21 02:19:18,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:18,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113728879] [2020-07-21 02:19:18,695 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:19,155 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:19:19,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:19,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 2321 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:19,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:20,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:20,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113728879] [2020-07-21 02:19:20,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:20,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:20,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986237963] [2020-07-21 02:19:20,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:20,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:20,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:20,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:20,131 INFO L87 Difference]: Start difference. First operand 22999 states and 38306 transitions. Second operand 3 states. [2020-07-21 02:19:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:20,794 INFO L93 Difference]: Finished difference Result 64399 states and 106742 transitions. [2020-07-21 02:19:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:20,795 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 365 [2020-07-21 02:19:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:20,912 INFO L225 Difference]: With dead ends: 64399 [2020-07-21 02:19:20,912 INFO L226 Difference]: Without dead ends: 42987 [2020-07-21 02:19:20,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 363 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 02:19:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42987 states. [2020-07-21 02:19:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42987 to 42983. [2020-07-21 02:19:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42983 states. [2020-07-21 02:19:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42983 states to 42983 states and 71026 transitions. [2020-07-21 02:19:22,064 INFO L78 Accepts]: Start accepts. Automaton has 42983 states and 71026 transitions. Word has length 365 [2020-07-21 02:19:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:22,064 INFO L479 AbstractCegarLoop]: Abstraction has 42983 states and 71026 transitions. [2020-07-21 02:19:22,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:22,065 INFO L276 IsEmpty]: Start isEmpty. Operand 42983 states and 71026 transitions. [2020-07-21 02:19:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-07-21 02:19:22,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:22,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:22,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:22,350 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:22,350 INFO L82 PathProgramCache]: Analyzing trace with hash -217176652, now seen corresponding path program 1 times [2020-07-21 02:19:22,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:22,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254087268] [2020-07-21 02:19:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:22,774 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:19:22,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:22,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 2329 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:19:22,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:23,111 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 02:19:23,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:23,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254087268] [2020-07-21 02:19:23,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:23,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:19:23,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125851964] [2020-07-21 02:19:23,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:19:23,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:23,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:19:23,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:19:23,113 INFO L87 Difference]: Start difference. First operand 42983 states and 71026 transitions. Second operand 7 states. [2020-07-21 02:19:28,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:28,241 INFO L93 Difference]: Finished difference Result 192800 states and 319814 transitions. [2020-07-21 02:19:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:19:28,241 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 369 [2020-07-21 02:19:28,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:29,027 INFO L225 Difference]: With dead ends: 192800 [2020-07-21 02:19:29,027 INFO L226 Difference]: Without dead ends: 151804 [2020-07-21 02:19:29,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:19:29,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151804 states. [2020-07-21 02:19:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151804 to 84184. [2020-07-21 02:19:33,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84184 states. [2020-07-21 02:19:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84184 states to 84184 states and 138711 transitions. [2020-07-21 02:19:33,552 INFO L78 Accepts]: Start accepts. Automaton has 84184 states and 138711 transitions. Word has length 369 [2020-07-21 02:19:33,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:33,553 INFO L479 AbstractCegarLoop]: Abstraction has 84184 states and 138711 transitions. [2020-07-21 02:19:33,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:19:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 84184 states and 138711 transitions. [2020-07-21 02:19:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 02:19:33,645 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:33,645 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:33,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:33,860 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:33,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1141436285, now seen corresponding path program 1 times [2020-07-21 02:19:33,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:33,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914672665] [2020-07-21 02:19:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:34,325 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:19:34,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:34,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 2332 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:19:34,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:34,488 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 02:19:34,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:34,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914672665] [2020-07-21 02:19:34,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:34,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:19:34,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150902401] [2020-07-21 02:19:34,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:19:34,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:34,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:19:34,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:19:34,491 INFO L87 Difference]: Start difference. First operand 84184 states and 138711 transitions. Second operand 7 states. [2020-07-21 02:19:40,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:40,569 INFO L93 Difference]: Finished difference Result 173104 states and 287430 transitions. [2020-07-21 02:19:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:19:40,571 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 370 [2020-07-21 02:19:40,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:40,764 INFO L225 Difference]: With dead ends: 173104 [2020-07-21 02:19:40,764 INFO L226 Difference]: Without dead ends: 151804 [2020-07-21 02:19:40,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:19:40,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151804 states. [2020-07-21 02:19:43,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151804 to 104928. [2020-07-21 02:19:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104928 states. [2020-07-21 02:19:44,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104928 states to 104928 states and 173420 transitions. [2020-07-21 02:19:44,123 INFO L78 Accepts]: Start accepts. Automaton has 104928 states and 173420 transitions. Word has length 370 [2020-07-21 02:19:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:44,124 INFO L479 AbstractCegarLoop]: Abstraction has 104928 states and 173420 transitions. [2020-07-21 02:19:44,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:19:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 104928 states and 173420 transitions. [2020-07-21 02:19:44,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 02:19:44,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:44,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:44,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:44,405 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:44,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1164348227, now seen corresponding path program 1 times [2020-07-21 02:19:44,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:44,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308187909] [2020-07-21 02:19:44,407 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:44,862 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:19:44,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:44,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 2332 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:19:44,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:45,020 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 02:19:45,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:45,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308187909] [2020-07-21 02:19:45,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:45,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:19:45,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821118720] [2020-07-21 02:19:45,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:19:45,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:45,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:19:45,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:19:45,023 INFO L87 Difference]: Start difference. First operand 104928 states and 173420 transitions. Second operand 7 states. [2020-07-21 02:19:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:51,795 INFO L93 Difference]: Finished difference Result 193720 states and 321627 transitions. [2020-07-21 02:19:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:19:51,796 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 370 [2020-07-21 02:19:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:51,993 INFO L225 Difference]: With dead ends: 193720 [2020-07-21 02:19:51,993 INFO L226 Difference]: Without dead ends: 172548 [2020-07-21 02:19:52,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:19:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172548 states. [2020-07-21 02:19:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172548 to 125513. [2020-07-21 02:19:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125513 states. [2020-07-21 02:19:56,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125513 states to 125513 states and 207569 transitions. [2020-07-21 02:19:56,401 INFO L78 Accepts]: Start accepts. Automaton has 125513 states and 207569 transitions. Word has length 370 [2020-07-21 02:19:56,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:56,401 INFO L479 AbstractCegarLoop]: Abstraction has 125513 states and 207569 transitions. [2020-07-21 02:19:56,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:19:56,402 INFO L276 IsEmpty]: Start isEmpty. Operand 125513 states and 207569 transitions. [2020-07-21 02:19:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 02:19:56,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:56,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:56,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:56,685 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:56,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:56,686 INFO L82 PathProgramCache]: Analyzing trace with hash -870147335, now seen corresponding path program 1 times [2020-07-21 02:19:56,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:56,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191479805] [2020-07-21 02:19:56,686 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:57,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:19:57,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:57,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 2332 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:19:57,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:57,339 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 02:19:57,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:57,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191479805] [2020-07-21 02:19:57,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:57,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:19:57,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122865138] [2020-07-21 02:19:57,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:19:57,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:57,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:19:57,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:19:57,342 INFO L87 Difference]: Start difference. First operand 125513 states and 207569 transitions. Second operand 7 states. [2020-07-21 02:20:06,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:06,513 INFO L93 Difference]: Finished difference Result 210260 states and 349087 transitions. [2020-07-21 02:20:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:20:06,514 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 370 [2020-07-21 02:20:06,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:06,719 INFO L225 Difference]: With dead ends: 210260 [2020-07-21 02:20:06,720 INFO L226 Difference]: Without dead ends: 189088 [2020-07-21 02:20:06,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:20:06,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189088 states. [2020-07-21 02:20:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189088 to 145999. [2020-07-21 02:20:11,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145999 states. [2020-07-21 02:20:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145999 states to 145999 states and 241550 transitions. [2020-07-21 02:20:11,772 INFO L78 Accepts]: Start accepts. Automaton has 145999 states and 241550 transitions. Word has length 370 [2020-07-21 02:20:11,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:11,772 INFO L479 AbstractCegarLoop]: Abstraction has 145999 states and 241550 transitions. [2020-07-21 02:20:11,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:20:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 145999 states and 241550 transitions. [2020-07-21 02:20:11,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 02:20:11,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:11,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:12,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:12,068 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:12,069 INFO L82 PathProgramCache]: Analyzing trace with hash -116828669, now seen corresponding path program 1 times [2020-07-21 02:20:12,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:12,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309943479] [2020-07-21 02:20:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:12,532 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:20:12,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:12,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 2332 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:20:12,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:12,686 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 02:20:12,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:12,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309943479] [2020-07-21 02:20:12,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:12,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:20:12,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477081276] [2020-07-21 02:20:12,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:20:12,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:12,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:20:12,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:20:12,688 INFO L87 Difference]: Start difference. First operand 145999 states and 241550 transitions. Second operand 7 states. [2020-07-21 02:20:21,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:21,874 INFO L93 Difference]: Finished difference Result 221312 states and 367429 transitions. [2020-07-21 02:20:21,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:20:21,874 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 370 [2020-07-21 02:20:21,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:22,105 INFO L225 Difference]: With dead ends: 221312 [2020-07-21 02:20:22,106 INFO L226 Difference]: Without dead ends: 200140 [2020-07-21 02:20:22,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:20:22,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200140 states. [2020-07-21 02:20:27,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200140 to 166254. [2020-07-21 02:20:27,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166254 states. [2020-07-21 02:20:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166254 states to 166254 states and 275139 transitions. [2020-07-21 02:20:27,921 INFO L78 Accepts]: Start accepts. Automaton has 166254 states and 275139 transitions. Word has length 370 [2020-07-21 02:20:27,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:27,922 INFO L479 AbstractCegarLoop]: Abstraction has 166254 states and 275139 transitions. [2020-07-21 02:20:27,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:20:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 166254 states and 275139 transitions. [2020-07-21 02:20:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 02:20:28,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:28,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:28,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:28,238 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1040596409, now seen corresponding path program 1 times [2020-07-21 02:20:28,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:28,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594016884] [2020-07-21 02:20:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:28,704 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:20:28,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:28,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 2332 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 02:20:28,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:28,857 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 02:20:28,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:28,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594016884] [2020-07-21 02:20:28,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:28,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 02:20:28,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192485494] [2020-07-21 02:20:28,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 02:20:28,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:28,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 02:20:28,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:20:28,860 INFO L87 Difference]: Start difference. First operand 166254 states and 275139 transitions. Second operand 7 states. [2020-07-21 02:20:38,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:38,036 INFO L93 Difference]: Finished difference Result 240576 states and 399385 transitions. [2020-07-21 02:20:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 02:20:38,036 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 370 [2020-07-21 02:20:38,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:38,288 INFO L225 Difference]: With dead ends: 240576 [2020-07-21 02:20:38,288 INFO L226 Difference]: Without dead ends: 219404 [2020-07-21 02:20:38,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 02:20:38,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219404 states. [2020-07-21 02:20:45,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219404 to 186872. [2020-07-21 02:20:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186872 states. [2020-07-21 02:20:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186872 states to 186872 states and 309344 transitions. [2020-07-21 02:20:45,400 INFO L78 Accepts]: Start accepts. Automaton has 186872 states and 309344 transitions. Word has length 370 [2020-07-21 02:20:45,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:45,400 INFO L479 AbstractCegarLoop]: Abstraction has 186872 states and 309344 transitions. [2020-07-21 02:20:45,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 02:20:45,401 INFO L276 IsEmpty]: Start isEmpty. Operand 186872 states and 309344 transitions. [2020-07-21 02:20:45,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-07-21 02:20:45,521 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:45,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:45,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:45,722 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:45,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:45,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1717896620, now seen corresponding path program 1 times [2020-07-21 02:20:45,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:45,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748245833] [2020-07-21 02:20:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:46,200 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:20:46,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:46,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 2335 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:46,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:46,336 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 02:20:46,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:46,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748245833] [2020-07-21 02:20:46,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:46,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:46,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315049818] [2020-07-21 02:20:46,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:46,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:46,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:46,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:46,338 INFO L87 Difference]: Start difference. First operand 186872 states and 309344 transitions. Second operand 3 states. [2020-07-21 02:20:56,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:56,030 INFO L93 Difference]: Finished difference Result 366015 states and 608985 transitions. [2020-07-21 02:20:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:56,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 371 [2020-07-21 02:20:56,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:56,314 INFO L225 Difference]: With dead ends: 366015 [2020-07-21 02:20:56,315 INFO L226 Difference]: Without dead ends: 256090 [2020-07-21 02:20:56,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 369 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 02:20:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256090 states. [2020-07-21 02:21:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256090 to 256086. [2020-07-21 02:21:08,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256086 states. [2020-07-21 02:21:08,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256086 states to 256086 states and 424250 transitions. [2020-07-21 02:21:08,364 INFO L78 Accepts]: Start accepts. Automaton has 256086 states and 424250 transitions. Word has length 371 [2020-07-21 02:21:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:08,365 INFO L479 AbstractCegarLoop]: Abstraction has 256086 states and 424250 transitions. [2020-07-21 02:21:08,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:21:08,365 INFO L276 IsEmpty]: Start isEmpty. Operand 256086 states and 424250 transitions. [2020-07-21 02:21:08,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-07-21 02:21:08,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:08,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:08,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:08,724 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:08,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:08,725 INFO L82 PathProgramCache]: Analyzing trace with hash 612666295, now seen corresponding path program 1 times [2020-07-21 02:21:08,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:08,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053632211] [2020-07-21 02:21:08,726 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:09,186 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:21:09,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:09,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:21:09,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:09,285 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 02:21:09,286 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:09,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053632211] [2020-07-21 02:21:09,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:09,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:21:09,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465405214] [2020-07-21 02:21:09,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:21:09,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:09,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:21:09,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:09,288 INFO L87 Difference]: Start difference. First operand 256086 states and 424250 transitions. Second operand 3 states. [2020-07-21 02:21:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:25,085 INFO L93 Difference]: Finished difference Result 505341 states and 838679 transitions. [2020-07-21 02:21:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:21:25,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 375 [2020-07-21 02:21:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:25,568 INFO L225 Difference]: With dead ends: 505341 [2020-07-21 02:21:25,568 INFO L226 Difference]: Without dead ends: 356153 [2020-07-21 02:21:25,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 373 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 02:21:25,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356153 states. [2020-07-21 02:21:44,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356153 to 356149. [2020-07-21 02:21:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356149 states. [2020-07-21 02:21:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356149 states to 356149 states and 589368 transitions. [2020-07-21 02:21:44,970 INFO L78 Accepts]: Start accepts. Automaton has 356149 states and 589368 transitions. Word has length 375 [2020-07-21 02:21:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:44,971 INFO L479 AbstractCegarLoop]: Abstraction has 356149 states and 589368 transitions. [2020-07-21 02:21:44,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:21:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 356149 states and 589368 transitions. [2020-07-21 02:21:45,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-07-21 02:21:45,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:45,226 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:45,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:45,439 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:45,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:45,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2018637674, now seen corresponding path program 1 times [2020-07-21 02:21:45,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:45,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821417154] [2020-07-21 02:21:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:45,901 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:21:45,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:45,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 2348 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:21:45,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:45,986 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 02:21:45,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:45,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821417154] [2020-07-21 02:21:45,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:45,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:21:45,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974625846] [2020-07-21 02:21:45,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:21:45,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:45,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:21:45,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:45,988 INFO L87 Difference]: Start difference. First operand 356149 states and 589368 transitions. Second operand 3 states. [2020-07-21 02:22:05,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:22:05,678 INFO L93 Difference]: Finished difference Result 704038 states and 1167281 transitions. [2020-07-21 02:22:05,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:22:05,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 379 [2020-07-21 02:22:05,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:22:06,314 INFO L225 Difference]: With dead ends: 704038 [2020-07-21 02:22:06,315 INFO L226 Difference]: Without dead ends: 497327 [2020-07-21 02:22:06,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 377 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 02:22:06,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497327 states. [2020-07-21 02:22:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497327 to 497323. [2020-07-21 02:22:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 497323 states. [2020-07-21 02:22:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497323 states to 497323 states and 821798 transitions. [2020-07-21 02:22:33,355 INFO L78 Accepts]: Start accepts. Automaton has 497323 states and 821798 transitions. Word has length 379 [2020-07-21 02:22:33,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:22:33,355 INFO L479 AbstractCegarLoop]: Abstraction has 497323 states and 821798 transitions. [2020-07-21 02:22:33,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:22:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 497323 states and 821798 transitions. [2020-07-21 02:22:34,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-07-21 02:22:34,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:22:34,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:22:34,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:34,812 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:22:34,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:22:34,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1478742443, now seen corresponding path program 1 times [2020-07-21 02:22:34,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:22:34,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590744830] [2020-07-21 02:22:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:35,218 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:22:35,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:22:35,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 1906 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:22:35,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:22:35,369 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 02:22:35,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:22:35,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590744830] [2020-07-21 02:22:35,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:22:35,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:22:35,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344957158] [2020-07-21 02:22:35,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:22:35,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:22:35,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:22:35,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:22:35,372 INFO L87 Difference]: Start difference. First operand 497323 states and 821798 transitions. Second operand 4 states. [2020-07-21 02:23:24,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:24,558 INFO L93 Difference]: Finished difference Result 1481920 states and 2449685 transitions. [2020-07-21 02:23:24,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:23:24,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 383 [2020-07-21 02:23:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:26,856 INFO L225 Difference]: With dead ends: 1481920 [2020-07-21 02:23:26,856 INFO L226 Difference]: Without dead ends: 984614 [2020-07-21 02:23:27,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 380 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 02:23:28,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984614 states. [2020-07-21 02:24:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984614 to 984610. [2020-07-21 02:24:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984610 states. [2020-07-21 02:24:35,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984610 states to 984610 states and 1624448 transitions. [2020-07-21 02:24:35,062 INFO L78 Accepts]: Start accepts. Automaton has 984610 states and 1624448 transitions. Word has length 383 [2020-07-21 02:24:35,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:35,062 INFO L479 AbstractCegarLoop]: Abstraction has 984610 states and 1624448 transitions. [2020-07-21 02:24:35,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:35,062 INFO L276 IsEmpty]: Start isEmpty. Operand 984610 states and 1624448 transitions. [2020-07-21 02:24:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-07-21 02:24:35,988 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:35,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:24:36,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:36,190 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:36,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:36,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1637288794, now seen corresponding path program 1 times [2020-07-21 02:24:36,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:36,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692645304] [2020-07-21 02:24:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:37,994 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 02:24:37,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:38,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 2359 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:38,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:38,082 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 02:24:38,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:38,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692645304] [2020-07-21 02:24:38,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:38,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:38,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429418706] [2020-07-21 02:24:38,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:38,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:38,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:38,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:38,085 INFO L87 Difference]: Start difference. First operand 984610 states and 1624448 transitions. Second operand 3 states. [2020-07-21 02:25:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:25:51,198 INFO L93 Difference]: Finished difference Result 1939627 states and 3206810 transitions. [2020-07-21 02:25:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:25:51,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 385 [2020-07-21 02:25:51,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:25:53,368 INFO L225 Difference]: With dead ends: 1939627 [2020-07-21 02:25:53,369 INFO L226 Difference]: Without dead ends: 1369491 [2020-07-21 02:25:53,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 383 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 02:25:55,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369491 states.