/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:41:09,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:41:09,433 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:41:09,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:41:09,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:41:09,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:41:09,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:41:09,450 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:41:09,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:41:09,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:41:09,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:41:09,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:41:09,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:41:09,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:41:09,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:41:09,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:41:09,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:41:09,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:41:09,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:41:09,463 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:41:09,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:41:09,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:41:09,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:41:09,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:41:09,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 14:41:09,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 14:41:09,478 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 14:41:09,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 14:41:09,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 14:41:09,480 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 14:41:09,480 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 14:41:09,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 14:41:09,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 14:41:09,483 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 14:41:09,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 14:41:09,488 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 14:41:09,489 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 14:41:09,489 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 14:41:09,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:41:09,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:41:09,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:41:09,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 14:41:09,515 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:41:09,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:41:09,518 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:41:09,518 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:41:09,518 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:41:09,518 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:41:09,519 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:41:09,519 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:41:09,519 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:41:09,519 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:41:09,520 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:41:09,520 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:41:09,521 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:41:09,521 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:41:09,521 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:41:09,521 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:41:09,522 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:41:09,522 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:41:09,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:41:09,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:41:09,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:41:09,523 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:41:09,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:41:09,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:41:09,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:41:09,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:41:09,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:09,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:41:09,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:41:09,524 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:41:09,802 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:41:09,818 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:41:09,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:41:09,824 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:41:09,825 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:41:09,825 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 14:41:09,893 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a95da812/214742c75339424c91b990f6c8ef180e/FLAG5e3b3ceaa [2020-07-21 14:41:10,596 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:41:10,598 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 14:41:10,627 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a95da812/214742c75339424c91b990f6c8ef180e/FLAG5e3b3ceaa [2020-07-21 14:41:10,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a95da812/214742c75339424c91b990f6c8ef180e [2020-07-21 14:41:10,754 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:41:10,758 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:41:10,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:41:10,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:41:10,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:41:10,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:41:10" (1/1) ... [2020-07-21 14:41:10,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@234a323e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:10, skipping insertion in model container [2020-07-21 14:41:10,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:41:10" (1/1) ... [2020-07-21 14:41:10,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:41:10,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:41:12,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:41:12,387 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:41:13,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:41:13,881 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:41:13,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:13 WrapperNode [2020-07-21 14:41:13,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:41:13,884 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:41:13,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:41:13,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:41:13,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:13" (1/1) ... [2020-07-21 14:41:13,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:13" (1/1) ... [2020-07-21 14:41:13,985 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:13" (1/1) ... [2020-07-21 14:41:13,985 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:13" (1/1) ... [2020-07-21 14:41:14,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:13" (1/1) ... [2020-07-21 14:41:14,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:13" (1/1) ... [2020-07-21 14:41:14,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:13" (1/1) ... [2020-07-21 14:41:14,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:41:14,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:41:14,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:41:14,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:41:14,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:41:14,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:41:14,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:41:14,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:41:14,274 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:41:14,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:41:14,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:41:14,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:41:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:41:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:41:14,276 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:41:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:41:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:41:14,277 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:41:14,278 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:41:14,278 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:41:14,279 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:41:14,279 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 14:41:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:41:14,280 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:41:14,281 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:41:14,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:41:14,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:41:18,782 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:41:18,783 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:41:18,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:41:18 BoogieIcfgContainer [2020-07-21 14:41:18,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:41:18,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:41:18,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:41:18,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:41:18,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:41:10" (1/3) ... [2020-07-21 14:41:18,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516625d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:41:18, skipping insertion in model container [2020-07-21 14:41:18,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:41:13" (2/3) ... [2020-07-21 14:41:18,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@516625d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:41:18, skipping insertion in model container [2020-07-21 14:41:18,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:41:18" (3/3) ... [2020-07-21 14:41:18,803 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 14:41:18,850 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:41:18,862 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 14:41:18,879 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 14:41:18,917 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:41:18,917 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:41:18,917 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:41:18,917 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:41:18,917 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:41:18,918 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:41:18,918 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:41:18,918 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:41:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states. [2020-07-21 14:41:19,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 14:41:19,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:19,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:19,007 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:19,014 INFO L82 PathProgramCache]: Analyzing trace with hash -856462850, now seen corresponding path program 1 times [2020-07-21 14:41:19,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:19,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257004465] [2020-07-21 14:41:19,026 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:19,634 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:19,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:19,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:41:19,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:20,074 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:20,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257004465] [2020-07-21 14:41:20,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:20,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:41:20,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934439920] [2020-07-21 14:41:20,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:41:20,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:20,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:41:20,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:41:20,096 INFO L87 Difference]: Start difference. First operand 1371 states. Second operand 4 states. [2020-07-21 14:41:20,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:20,595 INFO L93 Difference]: Finished difference Result 3964 states and 7171 transitions. [2020-07-21 14:41:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:41:20,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 464 [2020-07-21 14:41:20,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:20,632 INFO L225 Difference]: With dead ends: 3964 [2020-07-21 14:41:20,632 INFO L226 Difference]: Without dead ends: 2660 [2020-07-21 14:41:20,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:41:20,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2660 states. [2020-07-21 14:41:20,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2660 to 2607. [2020-07-21 14:41:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2607 states. [2020-07-21 14:41:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 4273 transitions. [2020-07-21 14:41:20,830 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 4273 transitions. Word has length 464 [2020-07-21 14:41:20,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:20,832 INFO L479 AbstractCegarLoop]: Abstraction has 2607 states and 4273 transitions. [2020-07-21 14:41:20,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:41:20,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 4273 transitions. [2020-07-21 14:41:20,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-07-21 14:41:20,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:20,847 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:21,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:21,061 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:21,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:21,062 INFO L82 PathProgramCache]: Analyzing trace with hash 873395850, now seen corresponding path program 1 times [2020-07-21 14:41:21,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:21,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236192676] [2020-07-21 14:41:21,063 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:21,463 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:21,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:21,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 1628 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:41:21,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:21,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:21,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236192676] [2020-07-21 14:41:21,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:21,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:41:21,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475020555] [2020-07-21 14:41:21,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:41:21,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:21,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:41:21,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:21,738 INFO L87 Difference]: Start difference. First operand 2607 states and 4273 transitions. Second operand 3 states. [2020-07-21 14:41:22,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:22,058 INFO L93 Difference]: Finished difference Result 7506 states and 12254 transitions. [2020-07-21 14:41:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:41:22,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 466 [2020-07-21 14:41:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:22,088 INFO L225 Difference]: With dead ends: 7506 [2020-07-21 14:41:22,088 INFO L226 Difference]: Without dead ends: 5065 [2020-07-21 14:41:22,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:22,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5065 states. [2020-07-21 14:41:22,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5065 to 5012. [2020-07-21 14:41:22,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5012 states. [2020-07-21 14:41:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5012 states to 5012 states and 8169 transitions. [2020-07-21 14:41:22,301 INFO L78 Accepts]: Start accepts. Automaton has 5012 states and 8169 transitions. Word has length 466 [2020-07-21 14:41:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:22,302 INFO L479 AbstractCegarLoop]: Abstraction has 5012 states and 8169 transitions. [2020-07-21 14:41:22,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:41:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5012 states and 8169 transitions. [2020-07-21 14:41:22,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-21 14:41:22,320 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:22,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:22,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:22,535 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:22,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1147643277, now seen corresponding path program 1 times [2020-07-21 14:41:22,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:22,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38498724] [2020-07-21 14:41:22,537 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:22,932 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:22,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:22,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:41:22,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:23,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:23,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:23,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38498724] [2020-07-21 14:41:23,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:23,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:41:23,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599942667] [2020-07-21 14:41:23,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:41:23,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:23,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:41:23,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:23,065 INFO L87 Difference]: Start difference. First operand 5012 states and 8169 transitions. Second operand 3 states. [2020-07-21 14:41:23,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:23,444 INFO L93 Difference]: Finished difference Result 14520 states and 23565 transitions. [2020-07-21 14:41:23,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:41:23,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2020-07-21 14:41:23,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:23,496 INFO L225 Difference]: With dead ends: 14520 [2020-07-21 14:41:23,497 INFO L226 Difference]: Without dead ends: 9769 [2020-07-21 14:41:23,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9769 states. [2020-07-21 14:41:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9769 to 5064. [2020-07-21 14:41:23,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5064 states. [2020-07-21 14:41:23,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5064 states to 5064 states and 8249 transitions. [2020-07-21 14:41:23,840 INFO L78 Accepts]: Start accepts. Automaton has 5064 states and 8249 transitions. Word has length 467 [2020-07-21 14:41:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:23,841 INFO L479 AbstractCegarLoop]: Abstraction has 5064 states and 8249 transitions. [2020-07-21 14:41:23,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:41:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 5064 states and 8249 transitions. [2020-07-21 14:41:23,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-21 14:41:23,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:23,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:24,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:24,080 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:24,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:24,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1639148901, now seen corresponding path program 1 times [2020-07-21 14:41:24,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:24,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077011233] [2020-07-21 14:41:24,081 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:24,446 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:24,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:24,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:41:24,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:24,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:24,677 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:24,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077011233] [2020-07-21 14:41:24,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:24,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:41:24,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023238475] [2020-07-21 14:41:24,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:41:24,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:24,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:41:24,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:24,680 INFO L87 Difference]: Start difference. First operand 5064 states and 8249 transitions. Second operand 3 states. [2020-07-21 14:41:25,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:25,150 INFO L93 Difference]: Finished difference Result 14749 states and 23964 transitions. [2020-07-21 14:41:25,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:41:25,151 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 468 [2020-07-21 14:41:25,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:25,199 INFO L225 Difference]: With dead ends: 14749 [2020-07-21 14:41:25,199 INFO L226 Difference]: Without dead ends: 9945 [2020-07-21 14:41:25,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:25,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9945 states. [2020-07-21 14:41:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9945 to 9892. [2020-07-21 14:41:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9892 states. [2020-07-21 14:41:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9892 states to 9892 states and 16038 transitions. [2020-07-21 14:41:25,580 INFO L78 Accepts]: Start accepts. Automaton has 9892 states and 16038 transitions. Word has length 468 [2020-07-21 14:41:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:25,581 INFO L479 AbstractCegarLoop]: Abstraction has 9892 states and 16038 transitions. [2020-07-21 14:41:25,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:41:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 9892 states and 16038 transitions. [2020-07-21 14:41:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-21 14:41:25,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:25,609 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:25,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:25,824 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:25,824 INFO L82 PathProgramCache]: Analyzing trace with hash -731002774, now seen corresponding path program 1 times [2020-07-21 14:41:25,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:25,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654245783] [2020-07-21 14:41:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:26,221 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:26,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:26,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:41:26,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:26,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:26,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654245783] [2020-07-21 14:41:26,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:26,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:41:26,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541117814] [2020-07-21 14:41:26,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:41:26,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:26,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:41:26,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:26,435 INFO L87 Difference]: Start difference. First operand 9892 states and 16038 transitions. Second operand 3 states. [2020-07-21 14:41:26,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:26,926 INFO L93 Difference]: Finished difference Result 28692 states and 46338 transitions. [2020-07-21 14:41:26,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:41:26,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 468 [2020-07-21 14:41:26,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:26,980 INFO L225 Difference]: With dead ends: 28692 [2020-07-21 14:41:26,981 INFO L226 Difference]: Without dead ends: 19293 [2020-07-21 14:41:27,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:27,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19293 states. [2020-07-21 14:41:28,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19293 to 10032. [2020-07-21 14:41:28,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10032 states. [2020-07-21 14:41:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10032 states to 10032 states and 16234 transitions. [2020-07-21 14:41:28,092 INFO L78 Accepts]: Start accepts. Automaton has 10032 states and 16234 transitions. Word has length 468 [2020-07-21 14:41:28,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:28,093 INFO L479 AbstractCegarLoop]: Abstraction has 10032 states and 16234 transitions. [2020-07-21 14:41:28,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:41:28,093 INFO L276 IsEmpty]: Start isEmpty. Operand 10032 states and 16234 transitions. [2020-07-21 14:41:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-21 14:41:28,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:28,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:28,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:28,332 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:28,333 INFO L82 PathProgramCache]: Analyzing trace with hash -2054955244, now seen corresponding path program 1 times [2020-07-21 14:41:28,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:28,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868436683] [2020-07-21 14:41:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:28,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:28,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:28,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:41:28,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:28,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:28,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868436683] [2020-07-21 14:41:28,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:28,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:41:28,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367257249] [2020-07-21 14:41:28,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:41:28,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:28,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:41:28,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:28,883 INFO L87 Difference]: Start difference. First operand 10032 states and 16234 transitions. Second operand 3 states. [2020-07-21 14:41:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:29,561 INFO L93 Difference]: Finished difference Result 28986 states and 46750 transitions. [2020-07-21 14:41:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:41:29,561 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 469 [2020-07-21 14:41:29,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:29,612 INFO L225 Difference]: With dead ends: 28986 [2020-07-21 14:41:29,613 INFO L226 Difference]: Without dead ends: 19501 [2020-07-21 14:41:29,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19501 states. [2020-07-21 14:41:30,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19501 to 10240. [2020-07-21 14:41:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10240 states. [2020-07-21 14:41:30,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10240 states to 10240 states and 16518 transitions. [2020-07-21 14:41:30,104 INFO L78 Accepts]: Start accepts. Automaton has 10240 states and 16518 transitions. Word has length 469 [2020-07-21 14:41:30,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:30,104 INFO L479 AbstractCegarLoop]: Abstraction has 10240 states and 16518 transitions. [2020-07-21 14:41:30,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:41:30,105 INFO L276 IsEmpty]: Start isEmpty. Operand 10240 states and 16518 transitions. [2020-07-21 14:41:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 14:41:30,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:30,127 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:30,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:30,340 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:30,341 INFO L82 PathProgramCache]: Analyzing trace with hash -607749024, now seen corresponding path program 1 times [2020-07-21 14:41:30,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:30,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022128524] [2020-07-21 14:41:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:30,707 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:30,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:30,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 1632 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:41:30,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:31,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:31,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022128524] [2020-07-21 14:41:31,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:31,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:41:31,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189584460] [2020-07-21 14:41:31,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:41:31,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:31,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:41:31,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:31,083 INFO L87 Difference]: Start difference. First operand 10240 states and 16518 transitions. Second operand 3 states. [2020-07-21 14:41:31,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:31,640 INFO L93 Difference]: Finished difference Result 29817 states and 48022 transitions. [2020-07-21 14:41:31,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:41:31,640 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2020-07-21 14:41:31,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:31,687 INFO L225 Difference]: With dead ends: 29817 [2020-07-21 14:41:31,688 INFO L226 Difference]: Without dead ends: 20110 [2020-07-21 14:41:31,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:31,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20110 states. [2020-07-21 14:41:32,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20110 to 20057. [2020-07-21 14:41:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20057 states. [2020-07-21 14:41:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20057 states to 20057 states and 32203 transitions. [2020-07-21 14:41:32,514 INFO L78 Accepts]: Start accepts. Automaton has 20057 states and 32203 transitions. Word has length 470 [2020-07-21 14:41:32,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:32,514 INFO L479 AbstractCegarLoop]: Abstraction has 20057 states and 32203 transitions. [2020-07-21 14:41:32,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:41:32,514 INFO L276 IsEmpty]: Start isEmpty. Operand 20057 states and 32203 transitions. [2020-07-21 14:41:32,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 14:41:32,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:32,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:32,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:32,767 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:32,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:32,768 INFO L82 PathProgramCache]: Analyzing trace with hash 427491005, now seen corresponding path program 1 times [2020-07-21 14:41:32,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:32,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954634626] [2020-07-21 14:41:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:33,145 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:33,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:33,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:41:33,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:33,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:33,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954634626] [2020-07-21 14:41:33,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:33,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:41:33,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985808860] [2020-07-21 14:41:33,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:41:33,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:33,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:41:33,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:41:33,257 INFO L87 Difference]: Start difference. First operand 20057 states and 32203 transitions. Second operand 4 states. [2020-07-21 14:41:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:34,632 INFO L93 Difference]: Finished difference Result 53708 states and 85614 transitions. [2020-07-21 14:41:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:41:34,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2020-07-21 14:41:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:34,691 INFO L225 Difference]: With dead ends: 53708 [2020-07-21 14:41:34,692 INFO L226 Difference]: Without dead ends: 37575 [2020-07-21 14:41:34,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:41:34,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37575 states. [2020-07-21 14:41:35,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37575 to 22707. [2020-07-21 14:41:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22707 states. [2020-07-21 14:41:35,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22707 states to 22707 states and 36841 transitions. [2020-07-21 14:41:35,709 INFO L78 Accepts]: Start accepts. Automaton has 22707 states and 36841 transitions. Word has length 470 [2020-07-21 14:41:35,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:35,709 INFO L479 AbstractCegarLoop]: Abstraction has 22707 states and 36841 transitions. [2020-07-21 14:41:35,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:41:35,710 INFO L276 IsEmpty]: Start isEmpty. Operand 22707 states and 36841 transitions. [2020-07-21 14:41:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 14:41:35,743 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:35,743 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:35,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:35,944 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:35,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:35,945 INFO L82 PathProgramCache]: Analyzing trace with hash 45153927, now seen corresponding path program 1 times [2020-07-21 14:41:35,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:35,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830720518] [2020-07-21 14:41:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:36,323 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:36,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:36,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1639 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:41:36,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:36,486 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:36,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830720518] [2020-07-21 14:41:36,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:36,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:41:36,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21307773] [2020-07-21 14:41:36,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:41:36,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:41:36,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:36,489 INFO L87 Difference]: Start difference. First operand 22707 states and 36841 transitions. Second operand 3 states. [2020-07-21 14:41:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:37,623 INFO L93 Difference]: Finished difference Result 55104 states and 87786 transitions. [2020-07-21 14:41:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:41:37,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 473 [2020-07-21 14:41:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:37,683 INFO L225 Difference]: With dead ends: 55104 [2020-07-21 14:41:37,684 INFO L226 Difference]: Without dead ends: 38920 [2020-07-21 14:41:37,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38920 states. [2020-07-21 14:41:38,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38920 to 23171. [2020-07-21 14:41:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23171 states. [2020-07-21 14:41:38,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23171 states to 23171 states and 37551 transitions. [2020-07-21 14:41:38,562 INFO L78 Accepts]: Start accepts. Automaton has 23171 states and 37551 transitions. Word has length 473 [2020-07-21 14:41:38,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:38,563 INFO L479 AbstractCegarLoop]: Abstraction has 23171 states and 37551 transitions. [2020-07-21 14:41:38,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:41:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 23171 states and 37551 transitions. [2020-07-21 14:41:38,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 14:41:38,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:38,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:38,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:38,796 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:38,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:38,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1849938264, now seen corresponding path program 1 times [2020-07-21 14:41:38,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:38,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996450966] [2020-07-21 14:41:38,798 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:39,153 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:39,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:39,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 1639 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:41:39,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:39,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:39,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:39,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996450966] [2020-07-21 14:41:39,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:39,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:41:39,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433092428] [2020-07-21 14:41:39,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:41:39,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:39,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:41:39,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:39,360 INFO L87 Difference]: Start difference. First operand 23171 states and 37551 transitions. Second operand 3 states. [2020-07-21 14:41:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:40,777 INFO L93 Difference]: Finished difference Result 55973 states and 89035 transitions. [2020-07-21 14:41:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:41:40,777 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 474 [2020-07-21 14:41:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:40,827 INFO L225 Difference]: With dead ends: 55973 [2020-07-21 14:41:40,828 INFO L226 Difference]: Without dead ends: 39557 [2020-07-21 14:41:40,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39557 states. [2020-07-21 14:41:42,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39557 to 23776. [2020-07-21 14:41:42,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23776 states. [2020-07-21 14:41:42,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23776 states to 23776 states and 38365 transitions. [2020-07-21 14:41:42,732 INFO L78 Accepts]: Start accepts. Automaton has 23776 states and 38365 transitions. Word has length 474 [2020-07-21 14:41:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:42,733 INFO L479 AbstractCegarLoop]: Abstraction has 23776 states and 38365 transitions. [2020-07-21 14:41:42,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:41:42,733 INFO L276 IsEmpty]: Start isEmpty. Operand 23776 states and 38365 transitions. [2020-07-21 14:41:42,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 14:41:42,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:42,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:42,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:42,974 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:42,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:42,975 INFO L82 PathProgramCache]: Analyzing trace with hash 2028001190, now seen corresponding path program 1 times [2020-07-21 14:41:42,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:42,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734768540] [2020-07-21 14:41:42,976 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:43,338 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:43,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:43,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1640 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:41:43,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:43,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:43,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:43,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734768540] [2020-07-21 14:41:43,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:43,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:41:43,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703987954] [2020-07-21 14:41:43,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:41:43,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:43,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:41:43,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:43,481 INFO L87 Difference]: Start difference. First operand 23776 states and 38365 transitions. Second operand 3 states. [2020-07-21 14:41:44,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:44,860 INFO L93 Difference]: Finished difference Result 56995 states and 90342 transitions. [2020-07-21 14:41:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:41:44,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-21 14:41:44,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:44,901 INFO L225 Difference]: With dead ends: 56995 [2020-07-21 14:41:44,901 INFO L226 Difference]: Without dead ends: 40404 [2020-07-21 14:41:44,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40404 states. [2020-07-21 14:41:45,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40404 to 24655. [2020-07-21 14:41:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24655 states. [2020-07-21 14:41:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24655 states to 24655 states and 39518 transitions. [2020-07-21 14:41:45,764 INFO L78 Accepts]: Start accepts. Automaton has 24655 states and 39518 transitions. Word has length 475 [2020-07-21 14:41:45,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:45,764 INFO L479 AbstractCegarLoop]: Abstraction has 24655 states and 39518 transitions. [2020-07-21 14:41:45,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:41:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 24655 states and 39518 transitions. [2020-07-21 14:41:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 14:41:45,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:45,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:46,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:46,004 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:46,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:46,005 INFO L82 PathProgramCache]: Analyzing trace with hash -2011339830, now seen corresponding path program 1 times [2020-07-21 14:41:46,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:46,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945539876] [2020-07-21 14:41:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:46,389 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:46,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:46,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:41:46,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:46,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:46,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:46,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945539876] [2020-07-21 14:41:46,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:46,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:41:46,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198091469] [2020-07-21 14:41:46,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:41:46,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:46,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:41:46,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:41:46,592 INFO L87 Difference]: Start difference. First operand 24655 states and 39518 transitions. Second operand 4 states. [2020-07-21 14:41:48,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:48,454 INFO L93 Difference]: Finished difference Result 73471 states and 117724 transitions. [2020-07-21 14:41:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:41:48,455 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-21 14:41:48,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:48,519 INFO L225 Difference]: With dead ends: 73471 [2020-07-21 14:41:48,520 INFO L226 Difference]: Without dead ends: 48871 [2020-07-21 14:41:48,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:41:48,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48871 states. [2020-07-21 14:41:50,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48871 to 48843. [2020-07-21 14:41:50,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48843 states. [2020-07-21 14:41:50,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48843 states to 48843 states and 77956 transitions. [2020-07-21 14:41:50,548 INFO L78 Accepts]: Start accepts. Automaton has 48843 states and 77956 transitions. Word has length 476 [2020-07-21 14:41:50,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:50,549 INFO L479 AbstractCegarLoop]: Abstraction has 48843 states and 77956 transitions. [2020-07-21 14:41:50,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:41:50,549 INFO L276 IsEmpty]: Start isEmpty. Operand 48843 states and 77956 transitions. [2020-07-21 14:41:50,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 14:41:50,612 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:50,612 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:41:50,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:50,813 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:41:50,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:41:50,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2091753818, now seen corresponding path program 1 times [2020-07-21 14:41:50,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:41:50,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545805166] [2020-07-21 14:41:50,815 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:41:51,191 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:41:51,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:41:51,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:41:51,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:41:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:41:51,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:41:51,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545805166] [2020-07-21 14:41:51,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:41:51,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:41:51,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312161799] [2020-07-21 14:41:51,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:41:51,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:41:51,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:41:51,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:51,408 INFO L87 Difference]: Start difference. First operand 48843 states and 77956 transitions. Second operand 3 states. [2020-07-21 14:41:55,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:41:55,938 INFO L93 Difference]: Finished difference Result 145169 states and 231554 transitions. [2020-07-21 14:41:55,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:41:55,938 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 14:41:55,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:41:56,058 INFO L225 Difference]: With dead ends: 145169 [2020-07-21 14:41:56,059 INFO L226 Difference]: Without dead ends: 96846 [2020-07-21 14:41:56,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:41:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96846 states. [2020-07-21 14:41:59,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96846 to 96815. [2020-07-21 14:41:59,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96815 states. [2020-07-21 14:41:59,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96815 states to 96815 states and 153901 transitions. [2020-07-21 14:41:59,730 INFO L78 Accepts]: Start accepts. Automaton has 96815 states and 153901 transitions. Word has length 478 [2020-07-21 14:41:59,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:41:59,730 INFO L479 AbstractCegarLoop]: Abstraction has 96815 states and 153901 transitions. [2020-07-21 14:41:59,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:41:59,731 INFO L276 IsEmpty]: Start isEmpty. Operand 96815 states and 153901 transitions. [2020-07-21 14:41:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 14:41:59,815 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:41:59,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:42:00,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:00,017 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:42:00,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:42:00,018 INFO L82 PathProgramCache]: Analyzing trace with hash -134186925, now seen corresponding path program 1 times [2020-07-21 14:42:00,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:42:00,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135643995] [2020-07-21 14:42:00,019 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:00,387 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:42:00,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:42:00,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:42:00,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:42:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:42:00,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:42:00,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135643995] [2020-07-21 14:42:00,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:42:00,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:42:00,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791811930] [2020-07-21 14:42:00,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:42:00,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:42:00,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:42:00,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:42:00,504 INFO L87 Difference]: Start difference. First operand 96815 states and 153901 transitions. Second operand 3 states. [2020-07-21 14:42:08,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:42:08,834 INFO L93 Difference]: Finished difference Result 289821 states and 460590 transitions. [2020-07-21 14:42:08,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:42:08,835 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 14:42:08,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:42:09,056 INFO L225 Difference]: With dead ends: 289821 [2020-07-21 14:42:09,056 INFO L226 Difference]: Without dead ends: 193146 [2020-07-21 14:42:09,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:42:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193146 states. [2020-07-21 14:42:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193146 to 96896. [2020-07-21 14:42:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96896 states. [2020-07-21 14:42:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96896 states to 96896 states and 154024 transitions. [2020-07-21 14:42:16,321 INFO L78 Accepts]: Start accepts. Automaton has 96896 states and 154024 transitions. Word has length 479 [2020-07-21 14:42:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:42:16,322 INFO L479 AbstractCegarLoop]: Abstraction has 96896 states and 154024 transitions. [2020-07-21 14:42:16,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:42:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 96896 states and 154024 transitions. [2020-07-21 14:42:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 14:42:16,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:42:16,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:42:16,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:16,607 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:42:16,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:42:16,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1040766527, now seen corresponding path program 1 times [2020-07-21 14:42:16,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:42:16,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049317338] [2020-07-21 14:42:16,609 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:16,973 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:42:16,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:42:16,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:42:16,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:42:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:42:17,160 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:42:17,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049317338] [2020-07-21 14:42:17,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:42:17,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:42:17,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385741835] [2020-07-21 14:42:17,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:42:17,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:42:17,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:42:17,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:42:17,162 INFO L87 Difference]: Start difference. First operand 96896 states and 154024 transitions. Second operand 3 states. [2020-07-21 14:42:27,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:42:27,166 INFO L93 Difference]: Finished difference Result 288686 states and 458764 transitions. [2020-07-21 14:42:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:42:27,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 14:42:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:42:27,402 INFO L225 Difference]: With dead ends: 288686 [2020-07-21 14:42:27,403 INFO L226 Difference]: Without dead ends: 192460 [2020-07-21 14:42:27,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:42:27,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192460 states. [2020-07-21 14:42:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192460 to 192434. [2020-07-21 14:42:38,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192434 states. [2020-07-21 14:42:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192434 states to 192434 states and 304731 transitions. [2020-07-21 14:42:39,257 INFO L78 Accepts]: Start accepts. Automaton has 192434 states and 304731 transitions. Word has length 480 [2020-07-21 14:42:39,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:42:39,258 INFO L479 AbstractCegarLoop]: Abstraction has 192434 states and 304731 transitions. [2020-07-21 14:42:39,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:42:39,258 INFO L276 IsEmpty]: Start isEmpty. Operand 192434 states and 304731 transitions. [2020-07-21 14:42:39,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 14:42:39,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:42:39,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:42:39,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:39,657 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:42:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:42:39,658 INFO L82 PathProgramCache]: Analyzing trace with hash -419297850, now seen corresponding path program 1 times [2020-07-21 14:42:39,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:42:39,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678994647] [2020-07-21 14:42:39,659 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:42:39,999 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:42:40,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:42:40,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:42:40,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:42:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:42:40,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:42:40,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678994647] [2020-07-21 14:42:40,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:42:40,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:42:40,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549571875] [2020-07-21 14:42:40,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:42:40,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:42:40,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:42:40,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:42:40,129 INFO L87 Difference]: Start difference. First operand 192434 states and 304731 transitions. Second operand 3 states. [2020-07-21 14:43:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:00,625 INFO L93 Difference]: Finished difference Result 575970 states and 911859 transitions. [2020-07-21 14:43:00,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:00,626 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 14:43:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:01,110 INFO L225 Difference]: With dead ends: 575970 [2020-07-21 14:43:01,110 INFO L226 Difference]: Without dead ends: 384159 [2020-07-21 14:43:01,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:01,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384159 states. [2020-07-21 14:43:12,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384159 to 192648. [2020-07-21 14:43:12,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192648 states. [2020-07-21 14:43:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192648 states to 192648 states and 305007 transitions. [2020-07-21 14:43:12,600 INFO L78 Accepts]: Start accepts. Automaton has 192648 states and 305007 transitions. Word has length 480 [2020-07-21 14:43:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:12,600 INFO L479 AbstractCegarLoop]: Abstraction has 192648 states and 305007 transitions. [2020-07-21 14:43:12,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 192648 states and 305007 transitions. [2020-07-21 14:43:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 14:43:12,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:12,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:13,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:13,001 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:13,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1033404314, now seen corresponding path program 1 times [2020-07-21 14:43:13,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:13,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778992010] [2020-07-21 14:43:13,003 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:13,377 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:13,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:13,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 1658 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:13,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:14,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:14,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778992010] [2020-07-21 14:43:14,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:14,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:14,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232859518] [2020-07-21 14:43:14,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:14,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:14,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:14,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:14,121 INFO L87 Difference]: Start difference. First operand 192648 states and 305007 transitions. Second operand 3 states. [2020-07-21 14:43:34,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:34,126 INFO L93 Difference]: Finished difference Result 573111 states and 907408 transitions. [2020-07-21 14:43:34,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:34,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 14:43:34,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:34,633 INFO L225 Difference]: With dead ends: 573111 [2020-07-21 14:43:34,633 INFO L226 Difference]: Without dead ends: 380584 [2020-07-21 14:43:34,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380584 states. [2020-07-21 14:43:52,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380584 to 192769. [2020-07-21 14:43:52,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192769 states. [2020-07-21 14:43:52,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192769 states to 192769 states and 305147 transitions. [2020-07-21 14:43:52,345 INFO L78 Accepts]: Start accepts. Automaton has 192769 states and 305147 transitions. Word has length 481 [2020-07-21 14:43:52,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:52,346 INFO L479 AbstractCegarLoop]: Abstraction has 192769 states and 305147 transitions. [2020-07-21 14:43:52,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:52,346 INFO L276 IsEmpty]: Start isEmpty. Operand 192769 states and 305147 transitions. [2020-07-21 14:43:52,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 14:43:52,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:52,508 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:52,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:52,709 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:52,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1283710204, now seen corresponding path program 1 times [2020-07-21 14:43:52,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:52,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096932244] [2020-07-21 14:43:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:53,096 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:53,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:53,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:43:53,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:53,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:53,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096932244] [2020-07-21 14:43:53,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:53,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:53,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492249742] [2020-07-21 14:43:53,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:53,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:53,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:53,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:53,270 INFO L87 Difference]: Start difference. First operand 192769 states and 305147 transitions. Second operand 4 states. [2020-07-21 14:44:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:09,499 INFO L93 Difference]: Finished difference Result 438379 states and 696757 transitions. [2020-07-21 14:44:09,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:44:09,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2020-07-21 14:44:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:09,801 INFO L225 Difference]: With dead ends: 438379 [2020-07-21 14:44:09,801 INFO L226 Difference]: Without dead ends: 245629 [2020-07-21 14:44:09,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:44:10,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245629 states. [2020-07-21 14:44:27,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245629 to 193460. [2020-07-21 14:44:27,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193460 states. [2020-07-21 14:44:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193460 states to 193460 states and 306187 transitions. [2020-07-21 14:44:27,692 INFO L78 Accepts]: Start accepts. Automaton has 193460 states and 306187 transitions. Word has length 482 [2020-07-21 14:44:27,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:27,692 INFO L479 AbstractCegarLoop]: Abstraction has 193460 states and 306187 transitions. [2020-07-21 14:44:27,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:44:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 193460 states and 306187 transitions. [2020-07-21 14:44:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 14:44:27,884 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:27,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:28,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:28,086 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:28,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:28,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1877943046, now seen corresponding path program 1 times [2020-07-21 14:44:28,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:28,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561647661] [2020-07-21 14:44:28,088 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:28,459 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:28,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:28,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:44:28,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:44:28,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:28,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561647661] [2020-07-21 14:44:28,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:28,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:44:28,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441050225] [2020-07-21 14:44:28,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:44:28,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:28,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:44:28,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:28,558 INFO L87 Difference]: Start difference. First operand 193460 states and 306187 transitions. Second operand 3 states. [2020-07-21 14:44:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:50,835 INFO L93 Difference]: Finished difference Result 579985 states and 917954 transitions. [2020-07-21 14:44:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:44:50,837 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 485 [2020-07-21 14:44:50,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:51,328 INFO L225 Difference]: With dead ends: 579985 [2020-07-21 14:44:51,328 INFO L226 Difference]: Without dead ends: 386553 [2020-07-21 14:44:51,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:51,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386553 states. [2020-07-21 14:45:10,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386553 to 193490. [2020-07-21 14:45:10,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193490 states. [2020-07-21 14:45:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193490 states to 193490 states and 306230 transitions. [2020-07-21 14:45:11,204 INFO L78 Accepts]: Start accepts. Automaton has 193490 states and 306230 transitions. Word has length 485 [2020-07-21 14:45:11,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:45:11,204 INFO L479 AbstractCegarLoop]: Abstraction has 193490 states and 306230 transitions. [2020-07-21 14:45:11,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:45:11,205 INFO L276 IsEmpty]: Start isEmpty. Operand 193490 states and 306230 transitions. [2020-07-21 14:45:11,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 14:45:11,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:45:11,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:45:11,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:11,603 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:45:11,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:45:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash -702722313, now seen corresponding path program 1 times [2020-07-21 14:45:11,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:45:11,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729416477] [2020-07-21 14:45:11,605 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:11,967 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:45:11,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:45:11,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 1661 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:45:11,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:45:12,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:45:12,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:45:12,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729416477] [2020-07-21 14:45:12,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:45:12,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:45:12,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845541145] [2020-07-21 14:45:12,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:45:12,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:45:12,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:45:12,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:45:12,084 INFO L87 Difference]: Start difference. First operand 193490 states and 306230 transitions. Second operand 3 states. [2020-07-21 14:45:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:45:40,967 INFO L93 Difference]: Finished difference Result 574800 states and 909664 transitions. [2020-07-21 14:45:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:45:40,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 14:45:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:45:41,467 INFO L225 Difference]: With dead ends: 574800 [2020-07-21 14:45:41,467 INFO L226 Difference]: Without dead ends: 383642 [2020-07-21 14:45:41,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:45:41,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383642 states. [2020-07-21 14:46:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383642 to 383618. [2020-07-21 14:46:11,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383618 states. [2020-07-21 14:46:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383618 states to 383618 states and 604913 transitions. [2020-07-21 14:46:12,328 INFO L78 Accepts]: Start accepts. Automaton has 383618 states and 604913 transitions. Word has length 486 [2020-07-21 14:46:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:12,328 INFO L479 AbstractCegarLoop]: Abstraction has 383618 states and 604913 transitions. [2020-07-21 14:46:12,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:12,328 INFO L276 IsEmpty]: Start isEmpty. Operand 383618 states and 604913 transitions. [2020-07-21 14:46:12,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 14:46:12,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:12,736 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:12,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:12,942 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:12,943 INFO L82 PathProgramCache]: Analyzing trace with hash -998782380, now seen corresponding path program 1 times [2020-07-21 14:46:12,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:12,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613684177] [2020-07-21 14:46:12,944 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:13,322 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:13,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:13,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:13,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:14,201 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:14,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613684177] [2020-07-21 14:46:14,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:14,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:14,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136604278] [2020-07-21 14:46:14,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:14,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:14,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:14,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:14,203 INFO L87 Difference]: Start difference. First operand 383618 states and 604913 transitions. Second operand 3 states. [2020-07-21 14:47:09,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:09,188 INFO L93 Difference]: Finished difference Result 1150743 states and 1814565 transitions. [2020-07-21 14:47:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:09,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 14:47:09,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:10,287 INFO L225 Difference]: With dead ends: 1150743 [2020-07-21 14:47:10,287 INFO L226 Difference]: Without dead ends: 767162 [2020-07-21 14:47:10,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:11,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767162 states. [2020-07-21 14:47:48,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767162 to 383668. [2020-07-21 14:47:48,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383668 states. [2020-07-21 14:47:49,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383668 states to 383668 states and 604983 transitions. [2020-07-21 14:47:49,550 INFO L78 Accepts]: Start accepts. Automaton has 383668 states and 604983 transitions. Word has length 486 [2020-07-21 14:47:49,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:49,550 INFO L479 AbstractCegarLoop]: Abstraction has 383668 states and 604983 transitions. [2020-07-21 14:47:49,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:49,550 INFO L276 IsEmpty]: Start isEmpty. Operand 383668 states and 604983 transitions. [2020-07-21 14:47:49,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 14:47:49,958 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:49,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:50,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:50,167 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:50,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:50,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1513049922, now seen corresponding path program 1 times [2020-07-21 14:47:50,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:50,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163955534] [2020-07-21 14:47:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:50,518 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:50,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:50,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 1663 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:50,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:50,622 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:50,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163955534] [2020-07-21 14:47:50,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:50,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:50,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545501282] [2020-07-21 14:47:50,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:50,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:50,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:50,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:50,624 INFO L87 Difference]: Start difference. First operand 383668 states and 604983 transitions. Second operand 3 states. [2020-07-21 14:48:47,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:47,444 INFO L93 Difference]: Finished difference Result 1150156 states and 1813654 transitions. [2020-07-21 14:48:47,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:48:47,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 14:48:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:49,119 INFO L225 Difference]: With dead ends: 1150156 [2020-07-21 14:48:49,120 INFO L226 Difference]: Without dead ends: 766514 [2020-07-21 14:48:49,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:49,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766514 states. [2020-07-21 14:49:28,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766514 to 383744. [2020-07-21 14:49:28,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383744 states. [2020-07-21 14:49:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383744 states to 383744 states and 605089 transitions. [2020-07-21 14:49:28,846 INFO L78 Accepts]: Start accepts. Automaton has 383744 states and 605089 transitions. Word has length 487 [2020-07-21 14:49:28,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:28,846 INFO L479 AbstractCegarLoop]: Abstraction has 383744 states and 605089 transitions. [2020-07-21 14:49:28,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:49:28,847 INFO L276 IsEmpty]: Start isEmpty. Operand 383744 states and 605089 transitions. [2020-07-21 14:49:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:49:36,763 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:36,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:49:36,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:36,964 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:36,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1966709896, now seen corresponding path program 1 times [2020-07-21 14:49:36,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:36,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200069385] [2020-07-21 14:49:36,966 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:37,330 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:49:37,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:37,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1662 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:49:37,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:49:37,504 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:37,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200069385] [2020-07-21 14:49:37,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:37,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:49:37,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39779956] [2020-07-21 14:49:37,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:49:37,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:49:37,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:49:37,507 INFO L87 Difference]: Start difference. First operand 383744 states and 605089 transitions. Second operand 4 states. [2020-07-21 14:50:33,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:50:33,556 INFO L93 Difference]: Finished difference Result 1095708 states and 1724351 transitions. [2020-07-21 14:50:33,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:50:33,557 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 14:50:33,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:50:34,620 INFO L225 Difference]: With dead ends: 1095708 [2020-07-21 14:50:34,621 INFO L226 Difference]: Without dead ends: 763959 [2020-07-21 14:50:34,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:50:35,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763959 states. [2020-07-21 14:51:21,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763959 to 445602. [2020-07-21 14:51:21,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445602 states. [2020-07-21 14:51:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445602 states to 445602 states and 706341 transitions. [2020-07-21 14:51:21,746 INFO L78 Accepts]: Start accepts. Automaton has 445602 states and 706341 transitions. Word has length 488 [2020-07-21 14:51:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:51:21,746 INFO L479 AbstractCegarLoop]: Abstraction has 445602 states and 706341 transitions. [2020-07-21 14:51:21,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:51:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 445602 states and 706341 transitions. [2020-07-21 14:51:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:51:22,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:51:22,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:51:23,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:51:23,195 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:51:23,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:51:23,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1388163954, now seen corresponding path program 1 times [2020-07-21 14:51:23,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:51:23,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770092095] [2020-07-21 14:51:23,198 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:51:23,590 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:51:23,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:51:23,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 1660 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:51:23,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:51:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:51:23,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:51:23,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770092095] [2020-07-21 14:51:23,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:51:23,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:51:23,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187098222] [2020-07-21 14:51:23,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:51:23,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:51:23,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:51:23,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:51:23,782 INFO L87 Difference]: Start difference. First operand 445602 states and 706341 transitions. Second operand 4 states.