/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 15:03:42,363 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 15:03:42,365 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 15:03:42,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-20 15:03:42,409 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 15:03:42,411 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 15:03:42,413 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 15:03:42,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 15:03:42,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 15:03:42,416 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 15:03:42,418 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 15:03:42,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 15:03:42,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 15:03:42,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 15:03:42,435 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 15:03:42,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 15:03:42,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 15:03:42,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 15:03:42,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 15:03:42,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 15:03:42,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 15:03:42,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 15:03:42,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 15:03:42,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 15:03:42,494 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 15:03:42,494 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 15:03:42,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 15:03:42,499 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 15:03:42,499 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 15:03:42,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 15:03:42,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 15:03:42,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 15:03:42,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 15:03:42,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 15:03:42,500 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 15:03:42,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 15:03:42,500 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 15:03:42,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 15:03:42,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 15:03:42,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 15:03:42,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 15:03:42,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 15:03:42,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:03:42,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 15:03:42,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 15:03:42,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 15:03:42,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 15:03:42,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:42,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 15:03:42,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 15:03:42,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 15:03:42,811 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 15:03:42,824 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 15:03:42,827 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 15:03:42,829 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 15:03:42,829 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 15:03:42,830 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 15:03:42,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a97dcd9/43d15b9b7df3426b97ed5dee98dc1807/FLAGf0379a761 [2020-07-20 15:03:43,656 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 15:03:43,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 15:03:43,688 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a97dcd9/43d15b9b7df3426b97ed5dee98dc1807/FLAGf0379a761 [2020-07-20 15:03:43,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55a97dcd9/43d15b9b7df3426b97ed5dee98dc1807 [2020-07-20 15:03:43,782 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 15:03:43,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 15:03:43,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 15:03:43,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 15:03:43,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 15:03:43,792 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:03:43" (1/1) ... [2020-07-20 15:03:43,795 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5da7f1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:03:43, skipping insertion in model container [2020-07-20 15:03:43,795 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:03:43" (1/1) ... [2020-07-20 15:03:43,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 15:03:44,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 15:03:46,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:03:46,378 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 15:03:48,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:03:48,353 INFO L208 MainTranslator]: Completed translation [2020-07-20 15:03:48,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:03:48 WrapperNode [2020-07-20 15:03:48,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 15:03:48,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 15:03:48,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 15:03:48,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 15:03:48,368 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:03:48" (1/1) ... [2020-07-20 15:03:48,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:03:48" (1/1) ... [2020-07-20 15:03:48,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:03:48" (1/1) ... [2020-07-20 15:03:48,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:03:48" (1/1) ... [2020-07-20 15:03:48,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:03:48" (1/1) ... [2020-07-20 15:03:48,598 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:03:48" (1/1) ... [2020-07-20 15:03:48,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:03:48" (1/1) ... [2020-07-20 15:03:48,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 15:03:48,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 15:03:48,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 15:03:48,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 15:03:48,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:03:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:03:48,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 15:03:48,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 15:03:48,741 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 15:03:48,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 15:03:48,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 15:03:48,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 15:03:48,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 15:03:48,744 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 15:03:48,744 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 15:03:48,744 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 15:03:48,745 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 15:03:48,746 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 15:03:48,746 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 15:03:48,747 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 15:03:48,747 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 15:03:48,748 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 15:03:48,749 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 15:03:48,749 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 15:03:48,750 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 15:03:48,750 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 15:03:48,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 15:03:48,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 15:03:55,503 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 15:03:55,504 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 15:03:55,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:03:55 BoogieIcfgContainer [2020-07-20 15:03:55,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 15:03:55,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 15:03:55,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 15:03:55,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 15:03:55,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:03:43" (1/3) ... [2020-07-20 15:03:55,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72695087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:03:55, skipping insertion in model container [2020-07-20 15:03:55,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:03:48" (2/3) ... [2020-07-20 15:03:55,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72695087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:03:55, skipping insertion in model container [2020-07-20 15:03:55,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:03:55" (3/3) ... [2020-07-20 15:03:55,527 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-20 15:03:55,539 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 15:03:55,549 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 15:03:55,566 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 15:03:55,602 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 15:03:55,602 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 15:03:55,603 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 15:03:55,603 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 15:03:55,603 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 15:03:55,603 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 15:03:55,603 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 15:03:55,603 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 15:03:55,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2020-07-20 15:03:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-07-20 15:03:55,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:03:55,695 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] [2020-07-20 15:03:55,695 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:03:55,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:03:55,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2040294362, now seen corresponding path program 1 times [2020-07-20 15:03:55,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:03:55,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122082728] [2020-07-20 15:03:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:56,317 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:03:56,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:03:56,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:03:56,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:03:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:03:56,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:03:56,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122082728] [2020-07-20 15:03:56,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:03:56,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:03:56,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409281740] [2020-07-20 15:03:56,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:03:56,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:03:56,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:03:56,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:03:56,558 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 4 states. [2020-07-20 15:03:56,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:03:56,807 INFO L93 Difference]: Finished difference Result 3766 states and 6558 transitions. [2020-07-20 15:03:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:03:56,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 290 [2020-07-20 15:03:56,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:03:56,852 INFO L225 Difference]: With dead ends: 3766 [2020-07-20 15:03:56,852 INFO L226 Difference]: Without dead ends: 2245 [2020-07-20 15:03:56,868 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 [2020-07-20 15:03:56,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-20 15:03:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-20 15:03:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-20 15:03:57,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3921 transitions. [2020-07-20 15:03:57,039 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3921 transitions. Word has length 290 [2020-07-20 15:03:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:03:57,043 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3921 transitions. [2020-07-20 15:03:57,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:03:57,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3921 transitions. [2020-07-20 15:03:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-20 15:03:57,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:03:57,058 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] [2020-07-20 15:03:57,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:57,272 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:03:57,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:03:57,273 INFO L82 PathProgramCache]: Analyzing trace with hash 337011349, now seen corresponding path program 1 times [2020-07-20 15:03:57,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:03:57,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011297397] [2020-07-20 15:03:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:57,694 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:03:57,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:03:57,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1611 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:03:57,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:03:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:03:57,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:03:57,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011297397] [2020-07-20 15:03:57,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:03:57,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:03:57,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501394883] [2020-07-20 15:03:57,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:03:57,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:03:57,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:03:57,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:03:57,842 INFO L87 Difference]: Start difference. First operand 2245 states and 3921 transitions. Second operand 4 states. [2020-07-20 15:03:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:03:57,958 INFO L93 Difference]: Finished difference Result 3568 states and 6182 transitions. [2020-07-20 15:03:57,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:03:57,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 299 [2020-07-20 15:03:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:03:57,974 INFO L225 Difference]: With dead ends: 3568 [2020-07-20 15:03:57,975 INFO L226 Difference]: Without dead ends: 2245 [2020-07-20 15:03:57,979 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 [2020-07-20 15:03:57,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-20 15:03:58,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-20 15:03:58,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-20 15:03:58,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3911 transitions. [2020-07-20 15:03:58,051 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3911 transitions. Word has length 299 [2020-07-20 15:03:58,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:03:58,056 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3911 transitions. [2020-07-20 15:03:58,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:03:58,057 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3911 transitions. [2020-07-20 15:03:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-07-20 15:03:58,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:03:58,067 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] [2020-07-20 15:03:58,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:58,281 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:03:58,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:03:58,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1777772303, now seen corresponding path program 1 times [2020-07-20 15:03:58,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:03:58,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354355800] [2020-07-20 15:03:58,282 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:58,669 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:03:58,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:03:58,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1622 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:03:58,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:03:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:03:58,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:03:58,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354355800] [2020-07-20 15:03:58,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:03:58,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:03:58,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934505630] [2020-07-20 15:03:58,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:03:58,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:03:58,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:03:58,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:03:58,765 INFO L87 Difference]: Start difference. First operand 2245 states and 3911 transitions. Second operand 4 states. [2020-07-20 15:03:58,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:03:58,880 INFO L93 Difference]: Finished difference Result 3004 states and 5206 transitions. [2020-07-20 15:03:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:03:58,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 308 [2020-07-20 15:03:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:03:58,894 INFO L225 Difference]: With dead ends: 3004 [2020-07-20 15:03:58,895 INFO L226 Difference]: Without dead ends: 2245 [2020-07-20 15:03:58,897 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 [2020-07-20 15:03:58,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-20 15:03:58,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-20 15:03:58,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-20 15:03:58,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3901 transitions. [2020-07-20 15:03:58,972 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3901 transitions. Word has length 308 [2020-07-20 15:03:58,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:03:58,973 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3901 transitions. [2020-07-20 15:03:58,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:03:58,973 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3901 transitions. [2020-07-20 15:03:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-07-20 15:03:58,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:03:58,983 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] [2020-07-20 15:03:59,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:59,199 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:03:59,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:03:59,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1995619946, now seen corresponding path program 1 times [2020-07-20 15:03:59,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:03:59,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498610102] [2020-07-20 15:03:59,201 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:03:59,640 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:03:59,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:03:59,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 1634 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:03:59,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:03:59,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:03:59,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:03:59,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498610102] [2020-07-20 15:03:59,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:03:59,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:03:59,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264634375] [2020-07-20 15:03:59,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:03:59,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:03:59,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:03:59,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:03:59,730 INFO L87 Difference]: Start difference. First operand 2245 states and 3901 transitions. Second operand 4 states. [2020-07-20 15:03:59,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:03:59,812 INFO L93 Difference]: Finished difference Result 2628 states and 4552 transitions. [2020-07-20 15:03:59,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:03:59,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 317 [2020-07-20 15:03:59,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:03:59,824 INFO L225 Difference]: With dead ends: 2628 [2020-07-20 15:03:59,825 INFO L226 Difference]: Without dead ends: 2245 [2020-07-20 15:03:59,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:03:59,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-20 15:03:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-20 15:03:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-20 15:03:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3891 transitions. [2020-07-20 15:03:59,888 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3891 transitions. Word has length 317 [2020-07-20 15:03:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:03:59,889 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3891 transitions. [2020-07-20 15:03:59,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:03:59,890 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3891 transitions. [2020-07-20 15:03:59,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 15:03:59,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:03:59,900 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] [2020-07-20 15:04:00,112 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:00,113 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:00,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:00,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1425361415, now seen corresponding path program 1 times [2020-07-20 15:04:00,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:00,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961207302] [2020-07-20 15:04:00,115 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:00,522 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:04:00,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:00,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:04:00,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:00,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:00,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961207302] [2020-07-20 15:04:00,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:00,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:04:00,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098985579] [2020-07-20 15:04:00,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:04:00,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:00,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:04:00,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:04:00,680 INFO L87 Difference]: Start difference. First operand 2245 states and 3891 transitions. Second operand 4 states. [2020-07-20 15:04:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:00,763 INFO L93 Difference]: Finished difference Result 3380 states and 5810 transitions. [2020-07-20 15:04:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:04:00,764 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-07-20 15:04:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:00,775 INFO L225 Difference]: With dead ends: 3380 [2020-07-20 15:04:00,776 INFO L226 Difference]: Without dead ends: 2245 [2020-07-20 15:04:00,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:04:00,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2020-07-20 15:04:00,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2020-07-20 15:04:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2020-07-20 15:04:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3881 transitions. [2020-07-20 15:04:00,837 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3881 transitions. Word has length 326 [2020-07-20 15:04:00,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:00,838 INFO L479 AbstractCegarLoop]: Abstraction has 2245 states and 3881 transitions. [2020-07-20 15:04:00,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:04:00,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3881 transitions. [2020-07-20 15:04:00,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 15:04:00,844 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:00,845 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] [2020-07-20 15:04:01,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:01,061 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:01,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash 296536054, now seen corresponding path program 1 times [2020-07-20 15:04:01,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:01,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606445441] [2020-07-20 15:04:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:01,454 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:04:01,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:01,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 1645 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:04:01,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:01,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:01,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606445441] [2020-07-20 15:04:01,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:01,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:04:01,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860016451] [2020-07-20 15:04:01,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:04:01,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:01,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:04:01,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:01,559 INFO L87 Difference]: Start difference. First operand 2245 states and 3881 transitions. Second operand 3 states. [2020-07-20 15:04:01,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:01,989 INFO L93 Difference]: Finished difference Result 4419 states and 7549 transitions. [2020-07-20 15:04:01,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:04:01,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 335 [2020-07-20 15:04:01,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:02,008 INFO L225 Difference]: With dead ends: 4419 [2020-07-20 15:04:02,009 INFO L226 Difference]: Without dead ends: 3472 [2020-07-20 15:04:02,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:02,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3472 states. [2020-07-20 15:04:02,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3472 to 2840. [2020-07-20 15:04:02,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2840 states. [2020-07-20 15:04:02,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4886 transitions. [2020-07-20 15:04:02,145 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4886 transitions. Word has length 335 [2020-07-20 15:04:02,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:02,145 INFO L479 AbstractCegarLoop]: Abstraction has 2840 states and 4886 transitions. [2020-07-20 15:04:02,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:04:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4886 transitions. [2020-07-20 15:04:02,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 15:04:02,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:02,155 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:04:02,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:02,368 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:02,369 INFO L82 PathProgramCache]: Analyzing trace with hash -67757891, now seen corresponding path program 1 times [2020-07-20 15:04:02,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:02,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438088700] [2020-07-20 15:04:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:02,832 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:04:02,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:02,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1647 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:04:02,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:02,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:02,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438088700] [2020-07-20 15:04:02,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:02,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:04:02,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700660217] [2020-07-20 15:04:02,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:04:02,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:02,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:04:02,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:02,964 INFO L87 Difference]: Start difference. First operand 2840 states and 4886 transitions. Second operand 3 states. [2020-07-20 15:04:03,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:03,280 INFO L93 Difference]: Finished difference Result 5971 states and 10167 transitions. [2020-07-20 15:04:03,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:04:03,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-20 15:04:03,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:03,304 INFO L225 Difference]: With dead ends: 5971 [2020-07-20 15:04:03,304 INFO L226 Difference]: Without dead ends: 4568 [2020-07-20 15:04:03,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:03,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4568 states. [2020-07-20 15:04:03,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4568 to 3930. [2020-07-20 15:04:03,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3930 states. [2020-07-20 15:04:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 6726 transitions. [2020-07-20 15:04:03,437 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 6726 transitions. Word has length 338 [2020-07-20 15:04:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:03,438 INFO L479 AbstractCegarLoop]: Abstraction has 3930 states and 6726 transitions. [2020-07-20 15:04:03,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:04:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 6726 transitions. [2020-07-20 15:04:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 15:04:03,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:03,449 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:04:03,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:03,663 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:03,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:03,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1413288515, now seen corresponding path program 1 times [2020-07-20 15:04:03,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:03,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336108313] [2020-07-20 15:04:03,666 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:04,053 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:04:04,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:04,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:04:04,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:04,216 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:04,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336108313] [2020-07-20 15:04:04,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:04,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:04:04,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746346610] [2020-07-20 15:04:04,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:04:04,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:04,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:04:04,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:04,218 INFO L87 Difference]: Start difference. First operand 3930 states and 6726 transitions. Second operand 3 states. [2020-07-20 15:04:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:04,551 INFO L93 Difference]: Finished difference Result 8630 states and 14647 transitions. [2020-07-20 15:04:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:04:04,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-20 15:04:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:04,583 INFO L225 Difference]: With dead ends: 8630 [2020-07-20 15:04:04,583 INFO L226 Difference]: Without dead ends: 6382 [2020-07-20 15:04:04,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:04,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6382 states. [2020-07-20 15:04:04,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6382 to 5806. [2020-07-20 15:04:04,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5806 states. [2020-07-20 15:04:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5806 states to 5806 states and 9888 transitions. [2020-07-20 15:04:04,777 INFO L78 Accepts]: Start accepts. Automaton has 5806 states and 9888 transitions. Word has length 341 [2020-07-20 15:04:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:04,778 INFO L479 AbstractCegarLoop]: Abstraction has 5806 states and 9888 transitions. [2020-07-20 15:04:04,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:04:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5806 states and 9888 transitions. [2020-07-20 15:04:04,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-20 15:04:04,789 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:04,790 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] [2020-07-20 15:04:05,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:05,005 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:05,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:05,006 INFO L82 PathProgramCache]: Analyzing trace with hash 885044882, now seen corresponding path program 1 times [2020-07-20 15:04:05,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:05,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744343808] [2020-07-20 15:04:05,007 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:05,377 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:04:05,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:05,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:04:05,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:05,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:05,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744343808] [2020-07-20 15:04:05,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:05,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:04:05,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918026948] [2020-07-20 15:04:05,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:04:05,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:05,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:04:05,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:05,524 INFO L87 Difference]: Start difference. First operand 5806 states and 9888 transitions. Second operand 3 states. [2020-07-20 15:04:06,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:06,005 INFO L93 Difference]: Finished difference Result 13095 states and 22155 transitions. [2020-07-20 15:04:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:04:06,006 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 344 [2020-07-20 15:04:06,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:06,046 INFO L225 Difference]: With dead ends: 13095 [2020-07-20 15:04:06,046 INFO L226 Difference]: Without dead ends: 9360 [2020-07-20 15:04:06,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9360 states. [2020-07-20 15:04:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9360 to 8844. [2020-07-20 15:04:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8844 states. [2020-07-20 15:04:06,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8844 states to 8844 states and 14994 transitions. [2020-07-20 15:04:06,326 INFO L78 Accepts]: Start accepts. Automaton has 8844 states and 14994 transitions. Word has length 344 [2020-07-20 15:04:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:06,327 INFO L479 AbstractCegarLoop]: Abstraction has 8844 states and 14994 transitions. [2020-07-20 15:04:06,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:04:06,327 INFO L276 IsEmpty]: Start isEmpty. Operand 8844 states and 14994 transitions. [2020-07-20 15:04:06,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-20 15:04:06,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:06,341 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] [2020-07-20 15:04:06,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:06,557 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:06,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:06,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1159896068, now seen corresponding path program 1 times [2020-07-20 15:04:06,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:06,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84425387] [2020-07-20 15:04:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:06,919 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:04:06,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:06,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 1479 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:04:06,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:07,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:07,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84425387] [2020-07-20 15:04:07,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:07,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:04:07,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783504344] [2020-07-20 15:04:07,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:04:07,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:07,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:04:07,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:04:07,008 INFO L87 Difference]: Start difference. First operand 8844 states and 14994 transitions. Second operand 4 states. [2020-07-20 15:04:07,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:07,235 INFO L93 Difference]: Finished difference Result 15076 states and 25491 transitions. [2020-07-20 15:04:07,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:04:07,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 347 [2020-07-20 15:04:07,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:07,261 INFO L225 Difference]: With dead ends: 15076 [2020-07-20 15:04:07,261 INFO L226 Difference]: Without dead ends: 8844 [2020-07-20 15:04:07,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:04:07,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8844 states. [2020-07-20 15:04:07,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8844 to 7530. [2020-07-20 15:04:07,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7530 states. [2020-07-20 15:04:07,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7530 states to 7530 states and 12771 transitions. [2020-07-20 15:04:07,502 INFO L78 Accepts]: Start accepts. Automaton has 7530 states and 12771 transitions. Word has length 347 [2020-07-20 15:04:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:07,503 INFO L479 AbstractCegarLoop]: Abstraction has 7530 states and 12771 transitions. [2020-07-20 15:04:07,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:04:07,503 INFO L276 IsEmpty]: Start isEmpty. Operand 7530 states and 12771 transitions. [2020-07-20 15:04:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-07-20 15:04:07,514 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:07,514 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] [2020-07-20 15:04:07,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:07,729 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:07,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:07,730 INFO L82 PathProgramCache]: Analyzing trace with hash 937230866, now seen corresponding path program 1 times [2020-07-20 15:04:07,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:07,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162014233] [2020-07-20 15:04:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:08,674 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:04:08,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:08,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1482 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-20 15:04:08,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:08,759 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:08,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162014233] [2020-07-20 15:04:08,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:08,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:04:08,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064151900] [2020-07-20 15:04:08,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:04:08,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:08,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:04:08,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:04:08,761 INFO L87 Difference]: Start difference. First operand 7530 states and 12771 transitions. Second operand 4 states. [2020-07-20 15:04:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:08,946 INFO L93 Difference]: Finished difference Result 12072 states and 20421 transitions. [2020-07-20 15:04:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:04:08,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 352 [2020-07-20 15:04:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:08,974 INFO L225 Difference]: With dead ends: 12072 [2020-07-20 15:04:08,974 INFO L226 Difference]: Without dead ends: 7530 [2020-07-20 15:04:08,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:04:09,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7530 states. [2020-07-20 15:04:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7530 to 6216. [2020-07-20 15:04:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6216 states. [2020-07-20 15:04:09,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6216 states to 6216 states and 10548 transitions. [2020-07-20 15:04:09,228 INFO L78 Accepts]: Start accepts. Automaton has 6216 states and 10548 transitions. Word has length 352 [2020-07-20 15:04:09,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:09,229 INFO L479 AbstractCegarLoop]: Abstraction has 6216 states and 10548 transitions. [2020-07-20 15:04:09,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:04:09,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6216 states and 10548 transitions. [2020-07-20 15:04:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-07-20 15:04:09,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:09,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:04:09,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:09,457 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:09,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:09,457 INFO L82 PathProgramCache]: Analyzing trace with hash 395724612, now seen corresponding path program 1 times [2020-07-20 15:04:09,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:09,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291624160] [2020-07-20 15:04:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:09,823 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:04:09,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:09,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:04:09,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:10,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:10,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291624160] [2020-07-20 15:04:10,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:10,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:04:10,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168809706] [2020-07-20 15:04:10,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:04:10,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:10,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:04:10,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:10,030 INFO L87 Difference]: Start difference. First operand 6216 states and 10548 transitions. Second operand 3 states. [2020-07-20 15:04:10,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:10,305 INFO L93 Difference]: Finished difference Result 12700 states and 21430 transitions. [2020-07-20 15:04:10,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:04:10,306 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 357 [2020-07-20 15:04:10,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:10,326 INFO L225 Difference]: With dead ends: 12700 [2020-07-20 15:04:10,326 INFO L226 Difference]: Without dead ends: 9878 [2020-07-20 15:04:10,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:10,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9878 states. [2020-07-20 15:04:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9878 to 9612. [2020-07-20 15:04:10,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9612 states. [2020-07-20 15:04:10,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9612 states to 9612 states and 16246 transitions. [2020-07-20 15:04:10,641 INFO L78 Accepts]: Start accepts. Automaton has 9612 states and 16246 transitions. Word has length 357 [2020-07-20 15:04:10,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:10,642 INFO L479 AbstractCegarLoop]: Abstraction has 9612 states and 16246 transitions. [2020-07-20 15:04:10,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:04:10,643 INFO L276 IsEmpty]: Start isEmpty. Operand 9612 states and 16246 transitions. [2020-07-20 15:04:10,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-07-20 15:04:10,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:10,651 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:04:10,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:10,865 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:10,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:10,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1923570902, now seen corresponding path program 1 times [2020-07-20 15:04:10,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:10,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164345027] [2020-07-20 15:04:10,866 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:11,259 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:04:11,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:11,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 15:04:11,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:11,360 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:11,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164345027] [2020-07-20 15:04:11,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:11,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:04:11,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973469580] [2020-07-20 15:04:11,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:04:11,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:11,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:04:11,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:04:11,364 INFO L87 Difference]: Start difference. First operand 9612 states and 16246 transitions. Second operand 4 states. [2020-07-20 15:04:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:11,883 INFO L93 Difference]: Finished difference Result 18678 states and 31466 transitions. [2020-07-20 15:04:11,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:04:11,884 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 358 [2020-07-20 15:04:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:11,911 INFO L225 Difference]: With dead ends: 18678 [2020-07-20 15:04:11,911 INFO L226 Difference]: Without dead ends: 9612 [2020-07-20 15:04:12,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:04:12,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9612 states. [2020-07-20 15:04:12,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9612 to 9612. [2020-07-20 15:04:12,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9612 states. [2020-07-20 15:04:12,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9612 states to 9612 states and 16186 transitions. [2020-07-20 15:04:12,332 INFO L78 Accepts]: Start accepts. Automaton has 9612 states and 16186 transitions. Word has length 358 [2020-07-20 15:04:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:12,333 INFO L479 AbstractCegarLoop]: Abstraction has 9612 states and 16186 transitions. [2020-07-20 15:04:12,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:04:12,333 INFO L276 IsEmpty]: Start isEmpty. Operand 9612 states and 16186 transitions. [2020-07-20 15:04:12,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-20 15:04:12,341 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:12,342 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] [2020-07-20 15:04:12,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:12,556 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:12,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:12,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1730706966, now seen corresponding path program 1 times [2020-07-20 15:04:12,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:12,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423865790] [2020-07-20 15:04:12,558 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:12,981 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:04:12,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:04:12,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:13,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:13,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423865790] [2020-07-20 15:04:13,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:13,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:04:13,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488860254] [2020-07-20 15:04:13,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:04:13,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:04:13,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:04:13,298 INFO L87 Difference]: Start difference. First operand 9612 states and 16186 transitions. Second operand 4 states. [2020-07-20 15:04:14,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:14,078 INFO L93 Difference]: Finished difference Result 28515 states and 48028 transitions. [2020-07-20 15:04:14,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:04:14,080 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2020-07-20 15:04:14,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:14,114 INFO L225 Difference]: With dead ends: 28515 [2020-07-20 15:04:14,114 INFO L226 Difference]: Without dead ends: 18976 [2020-07-20 15:04:14,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:04:14,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18976 states. [2020-07-20 15:04:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18976 to 18972. [2020-07-20 15:04:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18972 states. [2020-07-20 15:04:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18972 states to 18972 states and 31872 transitions. [2020-07-20 15:04:14,738 INFO L78 Accepts]: Start accepts. Automaton has 18972 states and 31872 transitions. Word has length 417 [2020-07-20 15:04:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:14,738 INFO L479 AbstractCegarLoop]: Abstraction has 18972 states and 31872 transitions. [2020-07-20 15:04:14,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:04:14,739 INFO L276 IsEmpty]: Start isEmpty. Operand 18972 states and 31872 transitions. [2020-07-20 15:04:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-20 15:04:14,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:14,752 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] [2020-07-20 15:04:14,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:14,958 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:14,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:14,959 INFO L82 PathProgramCache]: Analyzing trace with hash -568340488, now seen corresponding path program 1 times [2020-07-20 15:04:14,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:14,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429508806] [2020-07-20 15:04:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:15,402 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:04:15,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:15,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:04:15,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:15,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:15,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429508806] [2020-07-20 15:04:15,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:15,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:04:15,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48837033] [2020-07-20 15:04:15,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:04:15,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:15,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:04:15,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:04:15,875 INFO L87 Difference]: Start difference. First operand 18972 states and 31872 transitions. Second operand 4 states. [2020-07-20 15:04:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:16,869 INFO L93 Difference]: Finished difference Result 56372 states and 94718 transitions. [2020-07-20 15:04:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:04:16,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2020-07-20 15:04:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:16,920 INFO L225 Difference]: With dead ends: 56372 [2020-07-20 15:04:16,920 INFO L226 Difference]: Without dead ends: 37469 [2020-07-20 15:04:16,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:04:17,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37469 states. [2020-07-20 15:04:18,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37469 to 37465. [2020-07-20 15:04:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37465 states. [2020-07-20 15:04:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37465 states to 37465 states and 62768 transitions. [2020-07-20 15:04:18,397 INFO L78 Accepts]: Start accepts. Automaton has 37465 states and 62768 transitions. Word has length 417 [2020-07-20 15:04:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:18,398 INFO L479 AbstractCegarLoop]: Abstraction has 37465 states and 62768 transitions. [2020-07-20 15:04:18,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:04:18,398 INFO L276 IsEmpty]: Start isEmpty. Operand 37465 states and 62768 transitions. [2020-07-20 15:04:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-20 15:04:18,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:18,419 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] [2020-07-20 15:04:18,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:18,631 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:18,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:18,632 INFO L82 PathProgramCache]: Analyzing trace with hash -958965930, now seen corresponding path program 1 times [2020-07-20 15:04:18,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:18,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097125132] [2020-07-20 15:04:18,633 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:19,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:04:19,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:19,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:04:19,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:19,312 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:19,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097125132] [2020-07-20 15:04:19,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:19,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:04:19,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956074015] [2020-07-20 15:04:19,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:04:19,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:19,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:04:19,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:04:19,315 INFO L87 Difference]: Start difference. First operand 37465 states and 62768 transitions. Second operand 4 states. [2020-07-20 15:04:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:22,048 INFO L93 Difference]: Finished difference Result 110789 states and 185698 transitions. [2020-07-20 15:04:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:04:22,049 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2020-07-20 15:04:22,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:22,145 INFO L225 Difference]: With dead ends: 110789 [2020-07-20 15:04:22,146 INFO L226 Difference]: Without dead ends: 73497 [2020-07-20 15:04:22,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:04:22,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73497 states. [2020-07-20 15:04:24,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73497 to 73493. [2020-07-20 15:04:24,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73493 states. [2020-07-20 15:04:24,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73493 states to 73493 states and 122696 transitions. [2020-07-20 15:04:24,426 INFO L78 Accepts]: Start accepts. Automaton has 73493 states and 122696 transitions. Word has length 417 [2020-07-20 15:04:24,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:24,426 INFO L479 AbstractCegarLoop]: Abstraction has 73493 states and 122696 transitions. [2020-07-20 15:04:24,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:04:24,426 INFO L276 IsEmpty]: Start isEmpty. Operand 73493 states and 122696 transitions. [2020-07-20 15:04:24,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-20 15:04:24,452 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:24,452 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] [2020-07-20 15:04:24,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:24,653 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:24,654 INFO L82 PathProgramCache]: Analyzing trace with hash -2050629003, now seen corresponding path program 1 times [2020-07-20 15:04:24,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:24,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [41365363] [2020-07-20 15:04:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:25,065 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:04:25,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:25,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:04:25,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:25,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:25,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:25,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [41365363] [2020-07-20 15:04:25,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:25,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:04:25,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112417899] [2020-07-20 15:04:25,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:04:25,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:25,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:04:25,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:25,324 INFO L87 Difference]: Start difference. First operand 73493 states and 122696 transitions. Second operand 3 states. [2020-07-20 15:04:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:29,545 INFO L93 Difference]: Finished difference Result 159881 states and 266364 transitions. [2020-07-20 15:04:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:04:29,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 417 [2020-07-20 15:04:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:29,722 INFO L225 Difference]: With dead ends: 159881 [2020-07-20 15:04:29,723 INFO L226 Difference]: Without dead ends: 116925 [2020-07-20 15:04:29,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:04:29,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116925 states. [2020-07-20 15:04:35,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116925 to 116289. [2020-07-20 15:04:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116289 states. [2020-07-20 15:04:35,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116289 states to 116289 states and 193640 transitions. [2020-07-20 15:04:35,851 INFO L78 Accepts]: Start accepts. Automaton has 116289 states and 193640 transitions. Word has length 417 [2020-07-20 15:04:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:35,852 INFO L479 AbstractCegarLoop]: Abstraction has 116289 states and 193640 transitions. [2020-07-20 15:04:35,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:04:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 116289 states and 193640 transitions. [2020-07-20 15:04:35,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-20 15:04:35,875 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:35,875 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:04:36,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:36,081 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:36,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:36,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2136326472, now seen corresponding path program 1 times [2020-07-20 15:04:36,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:36,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657681256] [2020-07-20 15:04:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:36,495 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:04:36,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:04:36,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1838 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:04:36,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:04:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:04:36,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:04:36,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657681256] [2020-07-20 15:04:36,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:04:36,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:04:36,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505254930] [2020-07-20 15:04:36,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:04:36,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:04:36,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:04:36,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:04:36,820 INFO L87 Difference]: Start difference. First operand 116289 states and 193640 transitions. Second operand 4 states. [2020-07-20 15:04:46,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:04:46,560 INFO L93 Difference]: Finished difference Result 345533 states and 575437 transitions. [2020-07-20 15:04:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:04:46,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2020-07-20 15:04:46,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:04:46,943 INFO L225 Difference]: With dead ends: 345533 [2020-07-20 15:04:46,943 INFO L226 Difference]: Without dead ends: 229305 [2020-07-20 15:04:47,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:04:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229305 states. [2020-07-20 15:04:58,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229305 to 229301. [2020-07-20 15:04:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229301 states. [2020-07-20 15:04:58,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229301 states to 229301 states and 380442 transitions. [2020-07-20 15:04:58,825 INFO L78 Accepts]: Start accepts. Automaton has 229301 states and 380442 transitions. Word has length 417 [2020-07-20 15:04:58,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:04:58,826 INFO L479 AbstractCegarLoop]: Abstraction has 229301 states and 380442 transitions. [2020-07-20 15:04:58,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:04:58,826 INFO L276 IsEmpty]: Start isEmpty. Operand 229301 states and 380442 transitions. [2020-07-20 15:04:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2020-07-20 15:04:58,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:04:58,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:04:59,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:04:59,095 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:04:59,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:04:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash 312799544, now seen corresponding path program 1 times [2020-07-20 15:04:59,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:04:59,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267790787] [2020-07-20 15:04:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:00,094 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:05:00,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:00,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1839 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:05:00,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:00,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:00,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:00,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267790787] [2020-07-20 15:05:00,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:00,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:05:00,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565674906] [2020-07-20 15:05:00,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:05:00,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:00,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:05:00,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:05:00,339 INFO L87 Difference]: Start difference. First operand 229301 states and 380442 transitions. Second operand 4 states. [2020-07-20 15:05:20,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:05:20,238 INFO L93 Difference]: Finished difference Result 680339 states and 1129138 transitions. [2020-07-20 15:05:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:05:20,239 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 417 [2020-07-20 15:05:20,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:05:20,986 INFO L225 Difference]: With dead ends: 680339 [2020-07-20 15:05:20,987 INFO L226 Difference]: Without dead ends: 451623 [2020-07-20 15:05:21,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:05:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451623 states. [2020-07-20 15:05:51,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451623 to 451619. [2020-07-20 15:05:51,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451619 states. [2020-07-20 15:05:52,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451619 states to 451619 states and 747030 transitions. [2020-07-20 15:05:52,493 INFO L78 Accepts]: Start accepts. Automaton has 451619 states and 747030 transitions. Word has length 417 [2020-07-20 15:05:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:05:52,494 INFO L479 AbstractCegarLoop]: Abstraction has 451619 states and 747030 transitions. [2020-07-20 15:05:52,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:05:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 451619 states and 747030 transitions. [2020-07-20 15:05:52,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-20 15:05:52,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:05:52,575 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:05:52,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:05:52,782 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:05:52,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:05:52,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1066817210, now seen corresponding path program 1 times [2020-07-20 15:05:52,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:05:52,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137403042] [2020-07-20 15:05:52,784 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 15:05:53,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:05:53,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:05:53,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1843 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:05:53,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:05:54,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:05:54,371 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:05:54,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137403042] [2020-07-20 15:05:54,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:05:54,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:05:54,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811044121] [2020-07-20 15:05:54,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:05:54,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:05:54,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:05:54,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:05:54,373 INFO L87 Difference]: Start difference. First operand 451619 states and 747030 transitions. Second operand 4 states. [2020-07-20 15:06:52,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:52,613 INFO L93 Difference]: Finished difference Result 1336857 states and 2212274 transitions. [2020-07-20 15:06:52,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:52,613 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-07-20 15:06:52,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:54,093 INFO L225 Difference]: With dead ends: 1336857 [2020-07-20 15:06:54,094 INFO L226 Difference]: Without dead ends: 886885 [2020-07-20 15:06:54,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:55,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 886885 states. [2020-07-20 15:07:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 886885 to 886881. [2020-07-20 15:07:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886881 states. [2020-07-20 15:08:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886881 states to 886881 states and 1462182 transitions. [2020-07-20 15:08:02,190 INFO L78 Accepts]: Start accepts. Automaton has 886881 states and 1462182 transitions. Word has length 418 [2020-07-20 15:08:02,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:02,190 INFO L479 AbstractCegarLoop]: Abstraction has 886881 states and 1462182 transitions. [2020-07-20 15:08:02,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:08:02,191 INFO L276 IsEmpty]: Start isEmpty. Operand 886881 states and 1462182 transitions. [2020-07-20 15:08:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-20 15:08:02,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:02,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:08:02,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:02,536 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:02,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:02,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1654145598, now seen corresponding path program 1 times [2020-07-20 15:08:02,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:02,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221088383] [2020-07-20 15:08:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 15:08:02,934 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:08:02,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:02,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1841 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:08:02,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:08:03,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:03,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221088383] [2020-07-20 15:08:03,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:03,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:08:03,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086433198] [2020-07-20 15:08:03,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:08:03,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:03,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:08:03,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:08:03,176 INFO L87 Difference]: Start difference. First operand 886881 states and 1462182 transitions. Second operand 4 states. [2020-07-20 15:10:06,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:10:06,396 INFO L93 Difference]: Finished difference Result 2627201 states and 4333290 transitions. [2020-07-20 15:10:06,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:10:06,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 418 [2020-07-20 15:10:06,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:10:09,619 INFO L225 Difference]: With dead ends: 2627201 [2020-07-20 15:10:09,619 INFO L226 Difference]: Without dead ends: 1742289 [2020-07-20 15:10:10,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 415 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:10:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742289 states.