/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 14:43:24,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:43:24,424 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:43:24,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:43:24,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:43:24,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:43:24,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:43:24,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:43:24,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:43:24,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:43:24,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:43:24,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:43:24,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:43:24,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:43:24,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:43:24,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:43:24,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:43:24,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:43:24,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:43:24,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:43:24,489 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:43:24,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:43:24,495 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:43:24,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:43:24,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:43:24,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:43:24,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:43:24,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:43:24,513 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 14:43:24,549 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:43:24,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:43:24,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:43:24,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:43:24,555 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:43:24,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:43:24,555 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:43:24,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:43:24,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:43:24,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:43:24,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:43:24,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:43:24,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:43:24,557 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:43:24,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:43:24,557 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:43:24,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:43:24,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:43:24,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:43:24,558 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:43:24,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:43:24,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:43:24,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:43:24,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:43:24,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:43:24,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:43:24,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:24,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:43:24,561 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:43:24,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:43:24,836 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:43:24,850 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:43:24,853 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:43:24,855 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:43:24,855 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:43:24,856 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 14:43:24,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7093f42c8/0b160d0523f941b2956fb6c5f367dc73/FLAG6217b8d6c [2020-07-21 14:43:25,814 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:43:25,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 14:43:25,846 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7093f42c8/0b160d0523f941b2956fb6c5f367dc73/FLAG6217b8d6c [2020-07-21 14:43:26,264 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7093f42c8/0b160d0523f941b2956fb6c5f367dc73 [2020-07-21 14:43:26,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:43:26,276 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:43:26,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:43:26,277 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:43:26,281 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:43:26,282 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:43:26" (1/1) ... [2020-07-21 14:43:26,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769d466a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:26, skipping insertion in model container [2020-07-21 14:43:26,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:43:26" (1/1) ... [2020-07-21 14:43:26,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:43:26,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:43:28,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:43:28,684 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:43:30,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:43:30,684 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:43:30,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:30 WrapperNode [2020-07-21 14:43:30,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:43:30,686 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:43:30,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:43:30,687 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:43:30,703 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:30" (1/1) ... [2020-07-21 14:43:30,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:30" (1/1) ... [2020-07-21 14:43:30,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:30" (1/1) ... [2020-07-21 14:43:30,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:30" (1/1) ... [2020-07-21 14:43:30,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:30" (1/1) ... [2020-07-21 14:43:30,915 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:30" (1/1) ... [2020-07-21 14:43:30,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:30" (1/1) ... [2020-07-21 14:43:30,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:43:30,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:43:30,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:43:30,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:43:30,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:43:31,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:43:31,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:43:31,050 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:43:31,051 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:43:31,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:43:31,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:43:31,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:43:31,052 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:43:31,052 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:43:31,052 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:43:31,052 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:43:31,053 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:43:31,053 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:43:31,053 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:43:31,053 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:43:31,054 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:43:31,054 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 14:43:31,054 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:43:31,054 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:43:31,055 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:43:31,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:43:31,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:43:37,001 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:43:37,002 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:43:37,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:43:37 BoogieIcfgContainer [2020-07-21 14:43:37,021 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:43:37,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:43:37,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:43:37,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:43:37,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:43:26" (1/3) ... [2020-07-21 14:43:37,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c9a395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:43:37, skipping insertion in model container [2020-07-21 14:43:37,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:30" (2/3) ... [2020-07-21 14:43:37,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45c9a395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:43:37, skipping insertion in model container [2020-07-21 14:43:37,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:43:37" (3/3) ... [2020-07-21 14:43:37,030 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 14:43:37,041 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:43:37,051 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 14:43:37,066 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 14:43:37,100 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:43:37,100 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:43:37,100 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:43:37,101 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:43:37,101 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:43:37,101 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:43:37,101 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:43:37,101 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:43:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2020-07-21 14:43:37,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-07-21 14:43:37,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:37,202 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 14:43:37,202 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:37,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:37,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2040294362, now seen corresponding path program 1 times [2020-07-21 14:43:37,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:37,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327415984] [2020-07-21 14:43:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:37,739 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:37,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:37,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:43:37,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:37,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:37,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327415984] [2020-07-21 14:43:37,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:37,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:37,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088102187] [2020-07-21 14:43:37,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:37,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:38,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:38,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:38,014 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 4 states. [2020-07-21 14:43:38,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:38,264 INFO L93 Difference]: Finished difference Result 3578 states and 6234 transitions. [2020-07-21 14:43:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:38,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 290 [2020-07-21 14:43:38,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:38,301 INFO L225 Difference]: With dead ends: 3578 [2020-07-21 14:43:38,302 INFO L226 Difference]: Without dead ends: 2245 [2020-07-21 14:43:38,314 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 14:43:38,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-21 14:43:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-21 14:43:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 14:43:38,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3921 transitions. [2020-07-21 14:43:38,475 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3921 transitions. Word has length 290 [2020-07-21 14:43:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:38,478 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3921 transitions. [2020-07-21 14:43:38,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:38,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3921 transitions. [2020-07-21 14:43:38,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 14:43:38,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:38,491 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] [2020-07-21 14:43:38,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:38,705 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:38,707 INFO L82 PathProgramCache]: Analyzing trace with hash -694396288, now seen corresponding path program 1 times [2020-07-21 14:43:38,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:38,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836190067] [2020-07-21 14:43:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:39,108 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:39,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:43:39,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:39,213 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 14:43:39,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:39,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836190067] [2020-07-21 14:43:39,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:39,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:39,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714337553] [2020-07-21 14:43:39,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:39,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:39,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:39,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:39,223 INFO L87 Difference]: Start difference. First operand 2245 states and 3921 transitions. Second operand 4 states. [2020-07-21 14:43:39,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:39,342 INFO L93 Difference]: Finished difference Result 3004 states and 5216 transitions. [2020-07-21 14:43:39,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:39,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 299 [2020-07-21 14:43:39,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:39,361 INFO L225 Difference]: With dead ends: 3004 [2020-07-21 14:43:39,362 INFO L226 Difference]: Without dead ends: 2245 [2020-07-21 14:43:39,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 296 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 14:43:39,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-21 14:43:39,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-21 14:43:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 14:43:39,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3911 transitions. [2020-07-21 14:43:39,437 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3911 transitions. Word has length 299 [2020-07-21 14:43:39,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:39,439 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3911 transitions. [2020-07-21 14:43:39,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:39,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3911 transitions. [2020-07-21 14:43:39,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-07-21 14:43:39,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:39,450 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] [2020-07-21 14:43:39,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:39,664 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:39,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:39,665 INFO L82 PathProgramCache]: Analyzing trace with hash -61763353, now seen corresponding path program 1 times [2020-07-21 14:43:39,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:39,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883478116] [2020-07-21 14:43:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:40,058 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:40,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1622 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 14:43:40,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:40,138 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 14:43:40,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:40,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883478116] [2020-07-21 14:43:40,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:40,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:40,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576576742] [2020-07-21 14:43:40,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:40,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:40,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:40,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:40,142 INFO L87 Difference]: Start difference. First operand 2245 states and 3911 transitions. Second operand 4 states. [2020-07-21 14:43:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:40,349 INFO L93 Difference]: Finished difference Result 3944 states and 6796 transitions. [2020-07-21 14:43:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:43:40,350 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 308 [2020-07-21 14:43:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:40,362 INFO L225 Difference]: With dead ends: 3944 [2020-07-21 14:43:40,363 INFO L226 Difference]: Without dead ends: 2245 [2020-07-21 14:43:40,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 305 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 14:43:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-21 14:43:40,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-21 14:43:40,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 14:43:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3851 transitions. [2020-07-21 14:43:40,432 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3851 transitions. Word has length 308 [2020-07-21 14:43:40,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:40,433 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3851 transitions. [2020-07-21 14:43:40,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:40,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3851 transitions. [2020-07-21 14:43:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-21 14:43:40,444 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:40,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:40,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:40,660 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:40,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:40,661 INFO L82 PathProgramCache]: Analyzing trace with hash -972603693, now seen corresponding path program 1 times [2020-07-21 14:43:40,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:40,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803967723] [2020-07-21 14:43:40,663 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:41,278 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:41,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:41,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:43:41,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:41,536 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 14:43:41,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:41,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803967723] [2020-07-21 14:43:41,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:41,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:41,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19171592] [2020-07-21 14:43:41,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:41,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:41,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:41,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:41,539 INFO L87 Difference]: Start difference. First operand 2245 states and 3851 transitions. Second operand 4 states. [2020-07-21 14:43:41,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:41,627 INFO L93 Difference]: Finished difference Result 2628 states and 4502 transitions. [2020-07-21 14:43:41,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:41,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 367 [2020-07-21 14:43:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:41,643 INFO L225 Difference]: With dead ends: 2628 [2020-07-21 14:43:41,644 INFO L226 Difference]: Without dead ends: 2245 [2020-07-21 14:43:41,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 364 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 14:43:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-21 14:43:41,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-21 14:43:41,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 14:43:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3841 transitions. [2020-07-21 14:43:41,738 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3841 transitions. Word has length 367 [2020-07-21 14:43:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:41,739 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3841 transitions. [2020-07-21 14:43:41,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:41,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3841 transitions. [2020-07-21 14:43:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2020-07-21 14:43:41,753 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:41,753 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] [2020-07-21 14:43:41,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:41,968 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:41,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1785192810, now seen corresponding path program 1 times [2020-07-21 14:43:41,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:41,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357871598] [2020-07-21 14:43:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:42,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:42,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:42,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:43:42,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:42,488 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 14:43:42,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:42,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357871598] [2020-07-21 14:43:42,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:42,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:42,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419141630] [2020-07-21 14:43:42,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:42,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:42,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:42,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:42,491 INFO L87 Difference]: Start difference. First operand 2245 states and 3841 transitions. Second operand 4 states. [2020-07-21 14:43:42,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:42,586 INFO L93 Difference]: Finished difference Result 3756 states and 6394 transitions. [2020-07-21 14:43:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:42,586 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 376 [2020-07-21 14:43:42,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:42,600 INFO L225 Difference]: With dead ends: 3756 [2020-07-21 14:43:42,601 INFO L226 Difference]: Without dead ends: 2245 [2020-07-21 14:43:42,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 373 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 14:43:42,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-21 14:43:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-21 14:43:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 14:43:42,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3831 transitions. [2020-07-21 14:43:42,749 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3831 transitions. Word has length 376 [2020-07-21 14:43:42,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:42,750 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3831 transitions. [2020-07-21 14:43:42,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:42,750 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3831 transitions. [2020-07-21 14:43:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2020-07-21 14:43:42,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:42,763 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 14:43:42,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:42,977 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:42,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1198795533, now seen corresponding path program 1 times [2020-07-21 14:43:42,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:42,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596574165] [2020-07-21 14:43:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:43,326 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:43,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:43,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:43:43,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:43,440 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 14:43:43,444 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:43,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596574165] [2020-07-21 14:43:43,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:43,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:43,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578973469] [2020-07-21 14:43:43,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:43,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:43,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:43,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:43,450 INFO L87 Difference]: Start difference. First operand 2245 states and 3831 transitions. Second operand 4 states. [2020-07-21 14:43:43,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:43,539 INFO L93 Difference]: Finished difference Result 2816 states and 4794 transitions. [2020-07-21 14:43:43,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:43,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 385 [2020-07-21 14:43:43,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:43,552 INFO L225 Difference]: With dead ends: 2816 [2020-07-21 14:43:43,552 INFO L226 Difference]: Without dead ends: 2245 [2020-07-21 14:43:43,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 382 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 14:43:43,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-21 14:43:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-21 14:43:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 14:43:43,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3821 transitions. [2020-07-21 14:43:43,620 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3821 transitions. Word has length 385 [2020-07-21 14:43:43,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:43,621 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3821 transitions. [2020-07-21 14:43:43,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:43,621 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3821 transitions. [2020-07-21 14:43:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 14:43:43,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:43,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:43,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:43,850 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:43,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:43,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1285912565, now seen corresponding path program 1 times [2020-07-21 14:43:43,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:43,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969533319] [2020-07-21 14:43:43,851 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:44,236 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:44,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:44,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 1677 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:43:44,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:44,421 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 14:43:44,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:44,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969533319] [2020-07-21 14:43:44,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:44,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:44,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623794195] [2020-07-21 14:43:44,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:44,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:44,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:44,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:44,424 INFO L87 Difference]: Start difference. First operand 2245 states and 3821 transitions. Second operand 4 states. [2020-07-21 14:43:44,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:44,499 INFO L93 Difference]: Finished difference Result 3192 states and 5408 transitions. [2020-07-21 14:43:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:44,499 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 394 [2020-07-21 14:43:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:44,513 INFO L225 Difference]: With dead ends: 3192 [2020-07-21 14:43:44,513 INFO L226 Difference]: Without dead ends: 2245 [2020-07-21 14:43:44,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 391 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 14:43:44,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-21 14:43:44,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-21 14:43:44,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-21 14:43:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3811 transitions. [2020-07-21 14:43:44,575 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3811 transitions. Word has length 394 [2020-07-21 14:43:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:44,576 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3811 transitions. [2020-07-21 14:43:44,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:44,576 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3811 transitions. [2020-07-21 14:43:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2020-07-21 14:43:44,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:44,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:43:44,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:44,798 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:44,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:44,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1000349747, now seen corresponding path program 1 times [2020-07-21 14:43:44,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:44,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876586558] [2020-07-21 14:43:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:45,155 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:45,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:45,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 1683 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:45,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:45,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:45,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876586558] [2020-07-21 14:43:45,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:45,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:45,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283131362] [2020-07-21 14:43:45,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:45,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:45,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:45,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:45,292 INFO L87 Difference]: Start difference. First operand 2245 states and 3811 transitions. Second operand 3 states. [2020-07-21 14:43:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:45,600 INFO L93 Difference]: Finished difference Result 4571 states and 7720 transitions. [2020-07-21 14:43:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:45,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 403 [2020-07-21 14:43:45,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:45,619 INFO L225 Difference]: With dead ends: 4571 [2020-07-21 14:43:45,619 INFO L226 Difference]: Without dead ends: 3436 [2020-07-21 14:43:45,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 401 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 14:43:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2020-07-21 14:43:45,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2701. [2020-07-21 14:43:45,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2701 states. [2020-07-21 14:43:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 4581 transitions. [2020-07-21 14:43:45,710 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 4581 transitions. Word has length 403 [2020-07-21 14:43:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:45,711 INFO L479 AbstractCegarLoop]: Abstraction has 2701 states and 4581 transitions. [2020-07-21 14:43:45,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 4581 transitions. [2020-07-21 14:43:45,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2020-07-21 14:43:45,719 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:45,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:45,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:45,933 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:45,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:45,933 INFO L82 PathProgramCache]: Analyzing trace with hash 182866038, now seen corresponding path program 1 times [2020-07-21 14:43:45,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:45,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267329189] [2020-07-21 14:43:45,934 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:46,292 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:46,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:46,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1684 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:46,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:46,461 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:46,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267329189] [2020-07-21 14:43:46,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:46,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:46,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725337790] [2020-07-21 14:43:46,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:46,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:46,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:46,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:46,464 INFO L87 Difference]: Start difference. First operand 2701 states and 4581 transitions. Second operand 3 states. [2020-07-21 14:43:46,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:46,724 INFO L93 Difference]: Finished difference Result 5740 states and 9690 transitions. [2020-07-21 14:43:46,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:46,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 405 [2020-07-21 14:43:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:46,747 INFO L225 Difference]: With dead ends: 5740 [2020-07-21 14:43:46,748 INFO L226 Difference]: Without dead ends: 4288 [2020-07-21 14:43:46,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 403 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 14:43:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2020-07-21 14:43:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3546. [2020-07-21 14:43:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3546 states. [2020-07-21 14:43:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 6007 transitions. [2020-07-21 14:43:46,864 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 6007 transitions. Word has length 405 [2020-07-21 14:43:46,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:46,865 INFO L479 AbstractCegarLoop]: Abstraction has 3546 states and 6007 transitions. [2020-07-21 14:43:46,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 6007 transitions. [2020-07-21 14:43:46,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-21 14:43:46,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:46,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:47,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:47,089 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:47,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:47,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1543479455, now seen corresponding path program 1 times [2020-07-21 14:43:47,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:47,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847707915] [2020-07-21 14:43:47,093 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:47,451 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:47,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:47,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 1685 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:47,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:47,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:47,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:47,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847707915] [2020-07-21 14:43:47,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:47,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:47,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643457958] [2020-07-21 14:43:47,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:47,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:47,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:47,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:47,591 INFO L87 Difference]: Start difference. First operand 3546 states and 6007 transitions. Second operand 3 states. [2020-07-21 14:43:47,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:47,944 INFO L93 Difference]: Finished difference Result 7698 states and 12985 transitions. [2020-07-21 14:43:47,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:47,945 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 407 [2020-07-21 14:43:47,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:47,963 INFO L225 Difference]: With dead ends: 7698 [2020-07-21 14:43:47,963 INFO L226 Difference]: Without dead ends: 5646 [2020-07-21 14:43:47,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 405 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 14:43:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2020-07-21 14:43:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 5033. [2020-07-21 14:43:48,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5033 states. [2020-07-21 14:43:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5033 states to 5033 states and 8513 transitions. [2020-07-21 14:43:48,213 INFO L78 Accepts]: Start accepts. Automaton has 5033 states and 8513 transitions. Word has length 407 [2020-07-21 14:43:48,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:48,214 INFO L479 AbstractCegarLoop]: Abstraction has 5033 states and 8513 transitions. [2020-07-21 14:43:48,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5033 states and 8513 transitions. [2020-07-21 14:43:48,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 14:43:48,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:48,226 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, 1, 1, 1, 1, 1, 1, 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 14:43:48,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:48,440 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:48,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:48,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1685446582, now seen corresponding path program 1 times [2020-07-21 14:43:48,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:48,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108725723] [2020-07-21 14:43:48,441 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:48,805 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:48,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:48,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 1686 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:48,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:48,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:48,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108725723] [2020-07-21 14:43:48,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:48,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:48,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955975014] [2020-07-21 14:43:48,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:48,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:48,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:48,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:48,911 INFO L87 Difference]: Start difference. First operand 5033 states and 8513 transitions. Second operand 3 states. [2020-07-21 14:43:49,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:49,251 INFO L93 Difference]: Finished difference Result 11166 states and 18814 transitions. [2020-07-21 14:43:49,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:49,252 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 409 [2020-07-21 14:43:49,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:49,272 INFO L225 Difference]: With dead ends: 11166 [2020-07-21 14:43:49,272 INFO L226 Difference]: Without dead ends: 8016 [2020-07-21 14:43:49,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 407 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 14:43:49,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8016 states. [2020-07-21 14:43:49,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8016 to 7530. [2020-07-21 14:43:49,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7530 states. [2020-07-21 14:43:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7530 states to 7530 states and 12711 transitions. [2020-07-21 14:43:49,556 INFO L78 Accepts]: Start accepts. Automaton has 7530 states and 12711 transitions. Word has length 409 [2020-07-21 14:43:49,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:49,556 INFO L479 AbstractCegarLoop]: Abstraction has 7530 states and 12711 transitions. [2020-07-21 14:43:49,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:49,557 INFO L276 IsEmpty]: Start isEmpty. Operand 7530 states and 12711 transitions. [2020-07-21 14:43:49,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-07-21 14:43:49,572 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:49,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:49,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:49,786 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1963946767, now seen corresponding path program 1 times [2020-07-21 14:43:49,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:49,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553141653] [2020-07-21 14:43:49,787 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:50,152 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:50,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:50,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:50,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:50,349 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 14:43:50,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:50,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553141653] [2020-07-21 14:43:50,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:50,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:50,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664355474] [2020-07-21 14:43:50,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:50,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:50,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:50,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:50,353 INFO L87 Difference]: Start difference. First operand 7530 states and 12711 transitions. Second operand 3 states. [2020-07-21 14:43:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:50,793 INFO L93 Difference]: Finished difference Result 16968 states and 28539 transitions. [2020-07-21 14:43:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:50,794 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 411 [2020-07-21 14:43:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:50,824 INFO L225 Difference]: With dead ends: 16968 [2020-07-21 14:43:50,825 INFO L226 Difference]: Without dead ends: 11862 [2020-07-21 14:43:50,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 409 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 14:43:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11862 states. [2020-07-21 14:43:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11862 to 11499. [2020-07-21 14:43:51,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11499 states. [2020-07-21 14:43:51,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11499 states to 11499 states and 19357 transitions. [2020-07-21 14:43:51,178 INFO L78 Accepts]: Start accepts. Automaton has 11499 states and 19357 transitions. Word has length 411 [2020-07-21 14:43:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:51,179 INFO L479 AbstractCegarLoop]: Abstraction has 11499 states and 19357 transitions. [2020-07-21 14:43:51,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 11499 states and 19357 transitions. [2020-07-21 14:43:51,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-07-21 14:43:51,195 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:51,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:51,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:51,412 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:51,412 INFO L82 PathProgramCache]: Analyzing trace with hash -215742900, now seen corresponding path program 1 times [2020-07-21 14:43:51,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:51,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449214117] [2020-07-21 14:43:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:51,803 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:51,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:51,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 1698 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:43:51,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:51,865 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:43:53,217 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 14:43:53,218 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:53,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449214117] [2020-07-21 14:43:53,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:53,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:43:53,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058924450] [2020-07-21 14:43:53,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:43:53,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:53,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:43:53,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:43:53,223 INFO L87 Difference]: Start difference. First operand 11499 states and 19357 transitions. Second operand 5 states. [2020-07-21 14:43:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:55,223 INFO L93 Difference]: Finished difference Result 42541 states and 71433 transitions. [2020-07-21 14:43:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:43:55,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 413 [2020-07-21 14:43:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:55,318 INFO L225 Difference]: With dead ends: 42541 [2020-07-21 14:43:55,318 INFO L226 Difference]: Without dead ends: 31769 [2020-07-21 14:43:55,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 409 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 14:43:55,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31769 states. [2020-07-21 14:43:56,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31769 to 31757. [2020-07-21 14:43:56,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31757 states. [2020-07-21 14:43:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31757 states to 31757 states and 53172 transitions. [2020-07-21 14:43:56,748 INFO L78 Accepts]: Start accepts. Automaton has 31757 states and 53172 transitions. Word has length 413 [2020-07-21 14:43:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:56,749 INFO L479 AbstractCegarLoop]: Abstraction has 31757 states and 53172 transitions. [2020-07-21 14:43:56,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:43:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 31757 states and 53172 transitions. [2020-07-21 14:43:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-07-21 14:43:56,782 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:56,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:56,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:56,998 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:56,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:56,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1248689044, now seen corresponding path program 1 times [2020-07-21 14:43:56,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:56,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705996700] [2020-07-21 14:43:56,999 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:57,393 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:57,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:57,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 1709 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 14:43:57,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:57,530 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 14:43:57,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:57,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705996700] [2020-07-21 14:43:57,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:57,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:57,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449919538] [2020-07-21 14:43:57,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:57,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:57,533 INFO L87 Difference]: Start difference. First operand 31757 states and 53172 transitions. Second operand 4 states. [2020-07-21 14:43:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:59,121 INFO L93 Difference]: Finished difference Result 56855 states and 95181 transitions. [2020-07-21 14:43:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:59,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 425 [2020-07-21 14:43:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:59,222 INFO L225 Difference]: With dead ends: 56855 [2020-07-21 14:43:59,222 INFO L226 Difference]: Without dead ends: 31752 [2020-07-21 14:43:59,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 422 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 14:43:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31752 states. [2020-07-21 14:44:00,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31752 to 27432. [2020-07-21 14:44:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27432 states. [2020-07-21 14:44:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27432 states to 27432 states and 45928 transitions. [2020-07-21 14:44:00,049 INFO L78 Accepts]: Start accepts. Automaton has 27432 states and 45928 transitions. Word has length 425 [2020-07-21 14:44:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:00,050 INFO L479 AbstractCegarLoop]: Abstraction has 27432 states and 45928 transitions. [2020-07-21 14:44:00,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:44:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 27432 states and 45928 transitions. [2020-07-21 14:44:00,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-07-21 14:44:00,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:00,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:00,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:00,269 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:00,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:00,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1837564182, now seen corresponding path program 1 times [2020-07-21 14:44:00,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:00,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014155638] [2020-07-21 14:44:00,271 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:00,788 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:44:00,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:00,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 2979 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:44:00,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:01,079 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 14:44:01,079 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:01,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014155638] [2020-07-21 14:44:01,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:01,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:44:01,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294412034] [2020-07-21 14:44:01,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:44:01,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:01,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:44:01,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:01,082 INFO L87 Difference]: Start difference. First operand 27432 states and 45928 transitions. Second operand 3 states. [2020-07-21 14:44:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:02,077 INFO L93 Difference]: Finished difference Result 58518 states and 97885 transitions. [2020-07-21 14:44:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:44:02,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 431 [2020-07-21 14:44:02,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:02,149 INFO L225 Difference]: With dead ends: 58518 [2020-07-21 14:44:02,149 INFO L226 Difference]: Without dead ends: 31989 [2020-07-21 14:44:02,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 429 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 14:44:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31989 states. [2020-07-21 14:44:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31989 to 31985. [2020-07-21 14:44:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31985 states. [2020-07-21 14:44:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31985 states to 31985 states and 53452 transitions. [2020-07-21 14:44:03,478 INFO L78 Accepts]: Start accepts. Automaton has 31985 states and 53452 transitions. Word has length 431 [2020-07-21 14:44:03,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:03,478 INFO L479 AbstractCegarLoop]: Abstraction has 31985 states and 53452 transitions. [2020-07-21 14:44:03,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:44:03,479 INFO L276 IsEmpty]: Start isEmpty. Operand 31985 states and 53452 transitions. [2020-07-21 14:44:03,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 14:44:03,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:03,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:03,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:03,702 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:03,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:03,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1946259062, now seen corresponding path program 1 times [2020-07-21 14:44:03,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:03,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279062487] [2020-07-21 14:44:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:04,081 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:04,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:04,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1719 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:44:04,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:04,192 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 14:44:04,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:04,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279062487] [2020-07-21 14:44:04,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:04,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:44:04,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344089853] [2020-07-21 14:44:04,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:44:04,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:04,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:44:04,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:04,195 INFO L87 Difference]: Start difference. First operand 31985 states and 53452 transitions. Second operand 3 states. [2020-07-21 14:44:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:05,216 INFO L93 Difference]: Finished difference Result 68966 states and 115380 transitions. [2020-07-21 14:44:05,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:44:05,217 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 435 [2020-07-21 14:44:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:05,312 INFO L225 Difference]: With dead ends: 68966 [2020-07-21 14:44:05,312 INFO L226 Difference]: Without dead ends: 43056 [2020-07-21 14:44:05,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 433 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 14:44:05,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43056 states. [2020-07-21 14:44:07,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43056 to 42325. [2020-07-21 14:44:07,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42325 states. [2020-07-21 14:44:07,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42325 states to 42325 states and 70782 transitions. [2020-07-21 14:44:07,571 INFO L78 Accepts]: Start accepts. Automaton has 42325 states and 70782 transitions. Word has length 435 [2020-07-21 14:44:07,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:07,571 INFO L479 AbstractCegarLoop]: Abstraction has 42325 states and 70782 transitions. [2020-07-21 14:44:07,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:44:07,571 INFO L276 IsEmpty]: Start isEmpty. Operand 42325 states and 70782 transitions. [2020-07-21 14:44:07,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 14:44:07,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:07,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:07,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:07,783 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:07,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:07,784 INFO L82 PathProgramCache]: Analyzing trace with hash 855381512, now seen corresponding path program 1 times [2020-07-21 14:44:07,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:07,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909596045] [2020-07-21 14:44:07,785 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:08,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:08,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:08,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1712 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:44:08,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:08,267 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 14:44:08,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:08,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909596045] [2020-07-21 14:44:08,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:08,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:44:08,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447127035] [2020-07-21 14:44:08,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:44:08,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:08,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:44:08,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:08,270 INFO L87 Difference]: Start difference. First operand 42325 states and 70782 transitions. Second operand 3 states. [2020-07-21 14:44:09,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:09,623 INFO L93 Difference]: Finished difference Result 84954 states and 142115 transitions. [2020-07-21 14:44:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:44:09,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 435 [2020-07-21 14:44:09,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:09,687 INFO L225 Difference]: With dead ends: 84954 [2020-07-21 14:44:09,688 INFO L226 Difference]: Without dead ends: 48063 [2020-07-21 14:44:09,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 433 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 14:44:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48063 states. [2020-07-21 14:44:10,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48063 to 48059. [2020-07-21 14:44:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48059 states. [2020-07-21 14:44:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48059 states to 48059 states and 80295 transitions. [2020-07-21 14:44:11,379 INFO L78 Accepts]: Start accepts. Automaton has 48059 states and 80295 transitions. Word has length 435 [2020-07-21 14:44:11,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:11,379 INFO L479 AbstractCegarLoop]: Abstraction has 48059 states and 80295 transitions. [2020-07-21 14:44:11,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:44:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 48059 states and 80295 transitions. [2020-07-21 14:44:11,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2020-07-21 14:44:11,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:11,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:11,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:11,591 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:11,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1898192177, now seen corresponding path program 1 times [2020-07-21 14:44:11,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:11,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030979608] [2020-07-21 14:44:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:11,957 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:11,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:11,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:44:11,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:12,073 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 14:44:12,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:12,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030979608] [2020-07-21 14:44:12,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:12,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:44:12,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970693419] [2020-07-21 14:44:12,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:44:12,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:12,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:44:12,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:12,075 INFO L87 Difference]: Start difference. First operand 48059 states and 80295 transitions. Second operand 3 states. [2020-07-21 14:44:15,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:15,808 INFO L93 Difference]: Finished difference Result 128117 states and 214123 transitions. [2020-07-21 14:44:15,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:44:15,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 439 [2020-07-21 14:44:15,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:15,943 INFO L225 Difference]: With dead ends: 128117 [2020-07-21 14:44:15,943 INFO L226 Difference]: Without dead ends: 86582 [2020-07-21 14:44:16,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 437 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 14:44:16,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86582 states. [2020-07-21 14:44:18,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86582 to 84714. [2020-07-21 14:44:18,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84714 states. [2020-07-21 14:44:18,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84714 states to 84714 states and 141674 transitions. [2020-07-21 14:44:18,406 INFO L78 Accepts]: Start accepts. Automaton has 84714 states and 141674 transitions. Word has length 439 [2020-07-21 14:44:18,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:18,407 INFO L479 AbstractCegarLoop]: Abstraction has 84714 states and 141674 transitions. [2020-07-21 14:44:18,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:44:18,407 INFO L276 IsEmpty]: Start isEmpty. Operand 84714 states and 141674 transitions. [2020-07-21 14:44:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2020-07-21 14:44:18,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:18,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:18,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:18,622 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:18,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:18,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1334176463, now seen corresponding path program 1 times [2020-07-21 14:44:18,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:18,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290075443] [2020-07-21 14:44:18,623 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:19,015 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:19,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:19,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:44:19,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:19,196 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 14:44:19,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:19,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290075443] [2020-07-21 14:44:19,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:19,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:44:19,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637553786] [2020-07-21 14:44:19,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:44:19,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:44:19,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:44:19,198 INFO L87 Difference]: Start difference. First operand 84714 states and 141674 transitions. Second operand 4 states. [2020-07-21 14:44:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:26,389 INFO L93 Difference]: Finished difference Result 253174 states and 423319 transitions. [2020-07-21 14:44:26,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:44:26,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 439 [2020-07-21 14:44:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:26,643 INFO L225 Difference]: With dead ends: 253174 [2020-07-21 14:44:26,644 INFO L226 Difference]: Without dead ends: 168477 [2020-07-21 14:44:26,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 436 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 14:44:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168477 states. [2020-07-21 14:44:31,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168477 to 168473. [2020-07-21 14:44:31,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168473 states. [2020-07-21 14:44:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168473 states to 168473 states and 281053 transitions. [2020-07-21 14:44:32,242 INFO L78 Accepts]: Start accepts. Automaton has 168473 states and 281053 transitions. Word has length 439 [2020-07-21 14:44:32,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:32,242 INFO L479 AbstractCegarLoop]: Abstraction has 168473 states and 281053 transitions. [2020-07-21 14:44:32,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:44:32,243 INFO L276 IsEmpty]: Start isEmpty. Operand 168473 states and 281053 transitions. [2020-07-21 14:44:32,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 442 [2020-07-21 14:44:32,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:32,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:32,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:32,486 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:32,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:32,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1797289440, now seen corresponding path program 1 times [2020-07-21 14:44:32,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:32,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [158745016] [2020-07-21 14:44:32,488 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:32,874 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:32,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:32,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1719 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:44:32,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:33,049 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 14:44:33,050 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:33,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [158745016] [2020-07-21 14:44:33,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:33,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:44:33,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792717062] [2020-07-21 14:44:33,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:44:33,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:33,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:44:33,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:44:33,052 INFO L87 Difference]: Start difference. First operand 168473 states and 281053 transitions. Second operand 4 states. [2020-07-21 14:44:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:45,636 INFO L93 Difference]: Finished difference Result 503465 states and 839708 transitions. [2020-07-21 14:44:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:44:45,636 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 441 [2020-07-21 14:44:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:46,202 INFO L225 Difference]: With dead ends: 503465 [2020-07-21 14:44:46,202 INFO L226 Difference]: Without dead ends: 335010 [2020-07-21 14:44:46,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 438 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 14:44:46,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335010 states. [2020-07-21 14:45:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335010 to 335006. [2020-07-21 14:45:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335006 states. [2020-07-21 14:45:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335006 states to 335006 states and 557407 transitions. [2020-07-21 14:45:06,703 INFO L78 Accepts]: Start accepts. Automaton has 335006 states and 557407 transitions. Word has length 441 [2020-07-21 14:45:06,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:45:06,704 INFO L479 AbstractCegarLoop]: Abstraction has 335006 states and 557407 transitions. [2020-07-21 14:45:06,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:45:06,704 INFO L276 IsEmpty]: Start isEmpty. Operand 335006 states and 557407 transitions. [2020-07-21 14:45:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2020-07-21 14:45:06,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:45:06,770 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:45:06,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:06,971 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:45:06,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:45:06,972 INFO L82 PathProgramCache]: Analyzing trace with hash 851280521, now seen corresponding path program 1 times [2020-07-21 14:45:06,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:45:06,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375526777] [2020-07-21 14:45:06,973 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:07,351 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:45:07,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:45:07,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:45:07,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:45:07,510 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 14:45:07,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:45:07,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375526777] [2020-07-21 14:45:07,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:45:07,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:45:07,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919436963] [2020-07-21 14:45:07,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:45:07,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:45:07,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:45:07,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:45:07,512 INFO L87 Difference]: Start difference. First operand 335006 states and 557407 transitions. Second operand 4 states. [2020-07-21 14:45:36,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:45:36,896 INFO L93 Difference]: Finished difference Result 1000955 states and 1665002 transitions. [2020-07-21 14:45:36,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:45:36,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 444 [2020-07-21 14:45:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:45:38,121 INFO L225 Difference]: With dead ends: 1000955 [2020-07-21 14:45:38,121 INFO L226 Difference]: Without dead ends: 665984 [2020-07-21 14:45:38,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 441 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 14:45:46,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665984 states. [2020-07-21 14:46:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665984 to 665980. [2020-07-21 14:46:22,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665980 states. [2020-07-21 14:46:23,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665980 states to 665980 states and 1104940 transitions. [2020-07-21 14:46:23,607 INFO L78 Accepts]: Start accepts. Automaton has 665980 states and 1104940 transitions. Word has length 444 [2020-07-21 14:46:23,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:23,607 INFO L479 AbstractCegarLoop]: Abstraction has 665980 states and 1104940 transitions. [2020-07-21 14:46:23,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:23,607 INFO L276 IsEmpty]: Start isEmpty. Operand 665980 states and 1104940 transitions. [2020-07-21 14:46:32,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-07-21 14:46:32,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:32,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:32,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:32,649 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:32,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:32,650 INFO L82 PathProgramCache]: Analyzing trace with hash 219345117, now seen corresponding path program 1 times [2020-07-21 14:46:32,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:32,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064651993] [2020-07-21 14:46:32,651 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:33,049 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:33,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:33,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1721 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:33,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:33,271 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 14:46:33,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:33,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064651993] [2020-07-21 14:46:33,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:33,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:33,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138226529] [2020-07-21 14:46:33,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:33,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:33,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:33,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:33,273 INFO L87 Difference]: Start difference. First operand 665980 states and 1104940 transitions. Second operand 4 states. [2020-07-21 14:47:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:51,575 INFO L93 Difference]: Finished difference Result 1989137 states and 3299023 transitions. [2020-07-21 14:47:51,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:51,576 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 446 [2020-07-21 14:47:51,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:54,031 INFO L225 Difference]: With dead ends: 1989137 [2020-07-21 14:47:54,031 INFO L226 Difference]: Without dead ends: 1323223 [2020-07-21 14:47:54,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 443 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 14:47:55,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1323223 states.