/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:35:42,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:35:42,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:35:42,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:35:42,585 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:35:42,587 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:35:42,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:35:42,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:35:42,604 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:35:42,609 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:35:42,612 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:35:42,614 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:35:42,614 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:35:42,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:35:42,620 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:35:42,621 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:35:42,623 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:35:42,624 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:35:42,625 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:35:42,627 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:35:42,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:35:42,629 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:35:42,630 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:35:42,631 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:35:42,633 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 18:35:42,634 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 18:35:42,634 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 18:35:42,635 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 18:35:42,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 18:35:42,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 18:35:42,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 18:35:42,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 18:35:42,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 18:35:42,638 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 18:35:42,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 18:35:42,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 18:35:42,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 18:35:42,640 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 18:35:42,640 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:35:42,641 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:35:42,642 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:35:42,642 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 18:35:42,656 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:35:42,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:35:42,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:35:42,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:35:42,658 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:35:42,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:35:42,659 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:35:42,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:35:42,659 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:35:42,659 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:35:42,659 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:35:42,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:35:42,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:35:42,660 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:35:42,660 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:35:42,660 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:35:42,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:35:42,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:35:42,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:35:42,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:35:42,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:35:42,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:35:42,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:35:42,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:35:42,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:35:42,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:35:42,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:42,663 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:35:42,663 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:35:42,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 18:35:42,933 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:35:42,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:35:42,956 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:35:42,957 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:35:42,958 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:35:42,958 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 18:35:43,035 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a00fa6eb/b2f316cb9f564623b34bfbd8f7fcb0ed/FLAGb071b3137 [2020-07-20 18:35:43,757 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:35:43,758 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 18:35:43,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a00fa6eb/b2f316cb9f564623b34bfbd8f7fcb0ed/FLAGb071b3137 [2020-07-20 18:35:43,877 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a00fa6eb/b2f316cb9f564623b34bfbd8f7fcb0ed [2020-07-20 18:35:43,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:35:43,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:35:43,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:35:43,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:35:43,894 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:35:43,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:35:43" (1/1) ... [2020-07-20 18:35:43,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e2af008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:43, skipping insertion in model container [2020-07-20 18:35:43,899 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:35:43" (1/1) ... [2020-07-20 18:35:43,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:35:44,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:35:45,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:35:45,812 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:35:47,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:35:47,483 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:35:47,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:47 WrapperNode [2020-07-20 18:35:47,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:35:47,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:35:47,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:35:47,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:35:47,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:47" (1/1) ... [2020-07-20 18:35:47,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:47" (1/1) ... [2020-07-20 18:35:47,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:47" (1/1) ... [2020-07-20 18:35:47,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:47" (1/1) ... [2020-07-20 18:35:47,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:47" (1/1) ... [2020-07-20 18:35:47,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:47" (1/1) ... [2020-07-20 18:35:47,747 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:47" (1/1) ... [2020-07-20 18:35:47,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:35:47,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:35:47,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:35:47,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:35:47,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:35:47,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:35:47,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:35:47,875 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:35:47,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:35:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:35:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 18:35:47,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 18:35:47,877 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 18:35:47,877 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 18:35:47,877 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:35:47,878 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:35:47,878 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 18:35:47,878 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 18:35:47,878 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 18:35:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 18:35:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 18:35:47,879 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 18:35:47,880 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 18:35:47,880 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 18:35:47,880 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 18:35:47,881 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:35:47,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:35:47,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:35:52,066 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:35:52,067 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 18:35:52,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:35:52 BoogieIcfgContainer [2020-07-20 18:35:52,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:35:52,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:35:52,085 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:35:52,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:35:52,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:35:43" (1/3) ... [2020-07-20 18:35:52,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114b0931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:35:52, skipping insertion in model container [2020-07-20 18:35:52,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:47" (2/3) ... [2020-07-20 18:35:52,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@114b0931 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:35:52, skipping insertion in model container [2020-07-20 18:35:52,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:35:52" (3/3) ... [2020-07-20 18:35:52,095 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 18:35:52,105 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:35:52,119 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 18:35:52,133 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 18:35:52,164 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:35:52,165 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:35:52,165 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:35:52,165 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:35:52,165 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:35:52,165 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:35:52,165 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:35:52,166 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:35:52,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-07-20 18:35:52,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 18:35:52,259 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:52,261 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, 1, 1, 1, 1, 1] [2020-07-20 18:35:52,262 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:52,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:52,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-07-20 18:35:52,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:52,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195477316] [2020-07-20 18:35:52,278 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:52,996 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:52,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:53,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 2854 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:35:53,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:35:53,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:53,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195477316] [2020-07-20 18:35:53,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:53,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:35:53,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746324754] [2020-07-20 18:35:53,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:35:53,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:53,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:35:53,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:35:53,488 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 4 states. [2020-07-20 18:35:54,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:54,062 INFO L93 Difference]: Finished difference Result 4460 states and 8053 transitions. [2020-07-20 18:35:54,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:35:54,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-20 18:35:54,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:54,111 INFO L225 Difference]: With dead ends: 4460 [2020-07-20 18:35:54,112 INFO L226 Difference]: Without dead ends: 2963 [2020-07-20 18:35:54,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:35:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2020-07-20 18:35:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906. [2020-07-20 18:35:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2906 states. [2020-07-20 18:35:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4772 transitions. [2020-07-20 18:35:54,362 INFO L78 Accepts]: Start accepts. Automaton has 2906 states and 4772 transitions. Word has length 493 [2020-07-20 18:35:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:54,366 INFO L479 AbstractCegarLoop]: Abstraction has 2906 states and 4772 transitions. [2020-07-20 18:35:54,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:35:54,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2906 states and 4772 transitions. [2020-07-20 18:35:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-20 18:35:54,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:54,386 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, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:35:54,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:54,601 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:54,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:54,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1236769392, now seen corresponding path program 1 times [2020-07-20 18:35:54,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:54,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097746056] [2020-07-20 18:35:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:55,165 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:55,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:55,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 2854 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:35:55,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:35:55,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:55,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097746056] [2020-07-20 18:35:55,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:55,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:35:55,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929139113] [2020-07-20 18:35:55,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:35:55,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:55,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:35:55,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:55,453 INFO L87 Difference]: Start difference. First operand 2906 states and 4772 transitions. Second operand 3 states. [2020-07-20 18:35:55,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:55,874 INFO L93 Difference]: Finished difference Result 8439 states and 13819 transitions. [2020-07-20 18:35:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:35:55,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-20 18:35:55,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:55,917 INFO L225 Difference]: With dead ends: 8439 [2020-07-20 18:35:55,918 INFO L226 Difference]: Without dead ends: 5747 [2020-07-20 18:35:55,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5747 states. [2020-07-20 18:35:56,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5692. [2020-07-20 18:35:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5692 states. [2020-07-20 18:35:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9324 transitions. [2020-07-20 18:35:56,246 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 9324 transitions. Word has length 495 [2020-07-20 18:35:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:56,251 INFO L479 AbstractCegarLoop]: Abstraction has 5692 states and 9324 transitions. [2020-07-20 18:35:56,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:35:56,252 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 9324 transitions. [2020-07-20 18:35:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 18:35:56,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:56,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:35:56,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:56,487 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:56,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:56,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1780546784, now seen corresponding path program 1 times [2020-07-20 18:35:56,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:56,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663094945] [2020-07-20 18:35:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:56,978 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:56,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:56,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 2855 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:35:56,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:35:57,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:57,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663094945] [2020-07-20 18:35:57,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:57,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:35:57,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153372146] [2020-07-20 18:35:57,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:35:57,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:57,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:35:57,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:57,200 INFO L87 Difference]: Start difference. First operand 5692 states and 9324 transitions. Second operand 3 states. [2020-07-20 18:35:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:57,574 INFO L93 Difference]: Finished difference Result 16979 states and 27804 transitions. [2020-07-20 18:35:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:35:57,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-20 18:35:57,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:57,647 INFO L225 Difference]: With dead ends: 16979 [2020-07-20 18:35:57,647 INFO L226 Difference]: Without dead ends: 11339 [2020-07-20 18:35:57,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:57,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11339 states. [2020-07-20 18:35:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11339 to 5739. [2020-07-20 18:35:58,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5739 states. [2020-07-20 18:35:58,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 9398 transitions. [2020-07-20 18:35:58,036 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 9398 transitions. Word has length 496 [2020-07-20 18:35:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:58,036 INFO L479 AbstractCegarLoop]: Abstraction has 5739 states and 9398 transitions. [2020-07-20 18:35:58,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:35:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 9398 transitions. [2020-07-20 18:35:58,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 18:35:58,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:58,052 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:35:58,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:58,266 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:58,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1430972427, now seen corresponding path program 1 times [2020-07-20 18:35:58,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:58,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172055699] [2020-07-20 18:35:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:58,887 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:58,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:58,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 2859 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:35:58,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:35:59,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:59,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172055699] [2020-07-20 18:35:59,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:59,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:35:59,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550354787] [2020-07-20 18:35:59,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:35:59,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:59,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:35:59,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:59,123 INFO L87 Difference]: Start difference. First operand 5739 states and 9398 transitions. Second operand 3 states. [2020-07-20 18:35:59,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:59,587 INFO L93 Difference]: Finished difference Result 16541 states and 26991 transitions. [2020-07-20 18:35:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:35:59,588 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-20 18:35:59,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:59,647 INFO L225 Difference]: With dead ends: 16541 [2020-07-20 18:35:59,647 INFO L226 Difference]: Without dead ends: 11201 [2020-07-20 18:35:59,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11201 states. [2020-07-20 18:36:00,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11201 to 11148. [2020-07-20 18:36:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11148 states. [2020-07-20 18:36:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11148 states to 11148 states and 18172 transitions. [2020-07-20 18:36:00,776 INFO L78 Accepts]: Start accepts. Automaton has 11148 states and 18172 transitions. Word has length 497 [2020-07-20 18:36:00,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:00,777 INFO L479 AbstractCegarLoop]: Abstraction has 11148 states and 18172 transitions. [2020-07-20 18:36:00,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 11148 states and 18172 transitions. [2020-07-20 18:36:00,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 18:36:00,818 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:00,820 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:01,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:01,037 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:01,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:01,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1060694512, now seen corresponding path program 1 times [2020-07-20 18:36:01,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:01,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635009337] [2020-07-20 18:36:01,041 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:01,498 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:36:01,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:01,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 1424 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:01,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:01,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:01,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635009337] [2020-07-20 18:36:01,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:01,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:01,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735547422] [2020-07-20 18:36:01,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:01,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:01,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:01,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:01,692 INFO L87 Difference]: Start difference. First operand 11148 states and 18172 transitions. Second operand 3 states. [2020-07-20 18:36:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:02,319 INFO L93 Difference]: Finished difference Result 33174 states and 54040 transitions. [2020-07-20 18:36:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:02,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-20 18:36:02,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:02,378 INFO L225 Difference]: With dead ends: 33174 [2020-07-20 18:36:02,379 INFO L226 Difference]: Without dead ends: 22165 [2020-07-20 18:36:02,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:02,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22165 states. [2020-07-20 18:36:02,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22165 to 11227. [2020-07-20 18:36:02,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11227 states. [2020-07-20 18:36:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11227 states to 11227 states and 18277 transitions. [2020-07-20 18:36:02,884 INFO L78 Accepts]: Start accepts. Automaton has 11227 states and 18277 transitions. Word has length 497 [2020-07-20 18:36:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:02,884 INFO L479 AbstractCegarLoop]: Abstraction has 11227 states and 18277 transitions. [2020-07-20 18:36:02,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 11227 states and 18277 transitions. [2020-07-20 18:36:02,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 18:36:02,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:02,913 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:03,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:03,123 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:03,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:03,124 INFO L82 PathProgramCache]: Analyzing trace with hash 101246361, now seen corresponding path program 1 times [2020-07-20 18:36:03,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:03,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768662622] [2020-07-20 18:36:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:03,648 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:03,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:03,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 2859 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:03,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:03,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:03,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768662622] [2020-07-20 18:36:03,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:03,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:03,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699373115] [2020-07-20 18:36:03,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:03,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:03,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:03,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:03,996 INFO L87 Difference]: Start difference. First operand 11227 states and 18277 transitions. Second operand 3 states. [2020-07-20 18:36:04,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:04,762 INFO L93 Difference]: Finished difference Result 33334 states and 54261 transitions. [2020-07-20 18:36:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:04,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-20 18:36:04,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:04,818 INFO L225 Difference]: With dead ends: 33334 [2020-07-20 18:36:04,819 INFO L226 Difference]: Without dead ends: 22301 [2020-07-20 18:36:04,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:04,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22301 states. [2020-07-20 18:36:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22301 to 11363. [2020-07-20 18:36:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11363 states. [2020-07-20 18:36:05,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11363 states to 11363 states and 18469 transitions. [2020-07-20 18:36:05,348 INFO L78 Accepts]: Start accepts. Automaton has 11363 states and 18469 transitions. Word has length 498 [2020-07-20 18:36:05,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:05,348 INFO L479 AbstractCegarLoop]: Abstraction has 11363 states and 18469 transitions. [2020-07-20 18:36:05,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:05,348 INFO L276 IsEmpty]: Start isEmpty. Operand 11363 states and 18469 transitions. [2020-07-20 18:36:05,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 18:36:05,375 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:05,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:05,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:05,675 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:05,676 INFO L82 PathProgramCache]: Analyzing trace with hash -199707613, now seen corresponding path program 1 times [2020-07-20 18:36:05,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:05,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689201449] [2020-07-20 18:36:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:06,186 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:06,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:06,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 2871 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 18:36:06,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:06,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:06,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:06,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689201449] [2020-07-20 18:36:06,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:06,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 18:36:06,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024166302] [2020-07-20 18:36:06,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 18:36:06,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:06,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 18:36:06,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 18:36:06,475 INFO L87 Difference]: Start difference. First operand 11363 states and 18469 transitions. Second operand 8 states. [2020-07-20 18:36:09,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:09,989 INFO L93 Difference]: Finished difference Result 27045 states and 43423 transitions. [2020-07-20 18:36:09,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 18:36:09,989 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 499 [2020-07-20 18:36:09,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:10,045 INFO L225 Difference]: With dead ends: 27045 [2020-07-20 18:36:10,045 INFO L226 Difference]: Without dead ends: 20375 [2020-07-20 18:36:10,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 18:36:10,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20375 states. [2020-07-20 18:36:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20375 to 14279. [2020-07-20 18:36:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14279 states. [2020-07-20 18:36:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14279 states to 14279 states and 22877 transitions. [2020-07-20 18:36:10,679 INFO L78 Accepts]: Start accepts. Automaton has 14279 states and 22877 transitions. Word has length 499 [2020-07-20 18:36:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:10,680 INFO L479 AbstractCegarLoop]: Abstraction has 14279 states and 22877 transitions. [2020-07-20 18:36:10,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 18:36:10,680 INFO L276 IsEmpty]: Start isEmpty. Operand 14279 states and 22877 transitions. [2020-07-20 18:36:10,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 18:36:10,703 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:10,704 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:10,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:10,917 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:10,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:10,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1463165893, now seen corresponding path program 1 times [2020-07-20 18:36:10,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:10,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924308529] [2020-07-20 18:36:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:11,467 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:11,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:11,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 2867 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:11,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:11,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:11,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924308529] [2020-07-20 18:36:11,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:11,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:11,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549421132] [2020-07-20 18:36:11,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:11,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:11,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:11,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:11,601 INFO L87 Difference]: Start difference. First operand 14279 states and 22877 transitions. Second operand 3 states. [2020-07-20 18:36:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:12,199 INFO L93 Difference]: Finished difference Result 27083 states and 42882 transitions. [2020-07-20 18:36:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:12,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 18:36:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:12,247 INFO L225 Difference]: With dead ends: 27083 [2020-07-20 18:36:12,248 INFO L226 Difference]: Without dead ends: 17345 [2020-07-20 18:36:12,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17345 states. [2020-07-20 18:36:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17345 to 15207. [2020-07-20 18:36:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15207 states. [2020-07-20 18:36:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15207 states to 15207 states and 24413 transitions. [2020-07-20 18:36:13,597 INFO L78 Accepts]: Start accepts. Automaton has 15207 states and 24413 transitions. Word has length 499 [2020-07-20 18:36:13,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:13,597 INFO L479 AbstractCegarLoop]: Abstraction has 15207 states and 24413 transitions. [2020-07-20 18:36:13,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 15207 states and 24413 transitions. [2020-07-20 18:36:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 18:36:13,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:13,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:13,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:13,823 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:13,824 INFO L82 PathProgramCache]: Analyzing trace with hash 518385210, now seen corresponding path program 1 times [2020-07-20 18:36:13,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:13,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654472677] [2020-07-20 18:36:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:14,342 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:14,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:14,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 2859 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:14,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:14,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:14,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654472677] [2020-07-20 18:36:14,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:14,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:14,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296902968] [2020-07-20 18:36:14,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:14,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:14,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:14,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:14,638 INFO L87 Difference]: Start difference. First operand 15207 states and 24413 transitions. Second operand 3 states. [2020-07-20 18:36:15,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:15,726 INFO L93 Difference]: Finished difference Result 43793 states and 70136 transitions. [2020-07-20 18:36:15,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:15,726 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 18:36:15,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:15,835 INFO L225 Difference]: With dead ends: 43793 [2020-07-20 18:36:15,835 INFO L226 Difference]: Without dead ends: 29555 [2020-07-20 18:36:15,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29555 states. [2020-07-20 18:36:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29555 to 29504. [2020-07-20 18:36:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29504 states. [2020-07-20 18:36:17,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29504 states to 29504 states and 47158 transitions. [2020-07-20 18:36:17,043 INFO L78 Accepts]: Start accepts. Automaton has 29504 states and 47158 transitions. Word has length 499 [2020-07-20 18:36:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:17,044 INFO L479 AbstractCegarLoop]: Abstraction has 29504 states and 47158 transitions. [2020-07-20 18:36:17,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 29504 states and 47158 transitions. [2020-07-20 18:36:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 18:36:17,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:17,071 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:17,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:17,273 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:17,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:17,274 INFO L82 PathProgramCache]: Analyzing trace with hash 2080091133, now seen corresponding path program 1 times [2020-07-20 18:36:17,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:17,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320333639] [2020-07-20 18:36:17,275 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:17,789 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:36:17,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:17,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1424 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:36:17,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:17,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:17,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320333639] [2020-07-20 18:36:17,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:17,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:36:17,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796805917] [2020-07-20 18:36:17,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:36:17,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:17,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:36:17,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:36:17,947 INFO L87 Difference]: Start difference. First operand 29504 states and 47158 transitions. Second operand 4 states. [2020-07-20 18:36:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:20,501 INFO L93 Difference]: Finished difference Result 83584 states and 133029 transitions. [2020-07-20 18:36:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:36:20,502 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-07-20 18:36:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:20,669 INFO L225 Difference]: With dead ends: 83584 [2020-07-20 18:36:20,669 INFO L226 Difference]: Without dead ends: 56360 [2020-07-20 18:36:20,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:36:20,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56360 states. [2020-07-20 18:36:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56360 to 30797. [2020-07-20 18:36:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30797 states. [2020-07-20 18:36:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30797 states to 30797 states and 49437 transitions. [2020-07-20 18:36:23,454 INFO L78 Accepts]: Start accepts. Automaton has 30797 states and 49437 transitions. Word has length 499 [2020-07-20 18:36:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:23,454 INFO L479 AbstractCegarLoop]: Abstraction has 30797 states and 49437 transitions. [2020-07-20 18:36:23,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:36:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 30797 states and 49437 transitions. [2020-07-20 18:36:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 18:36:23,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:23,478 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:23,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:23,693 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:23,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1992437422, now seen corresponding path program 1 times [2020-07-20 18:36:23,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:23,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440875903] [2020-07-20 18:36:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:24,036 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:36:24,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:24,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 18:36:24,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:24,237 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:24,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440875903] [2020-07-20 18:36:24,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:24,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 18:36:24,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686996539] [2020-07-20 18:36:24,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 18:36:24,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:24,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 18:36:24,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 18:36:24,239 INFO L87 Difference]: Start difference. First operand 30797 states and 49437 transitions. Second operand 9 states. [2020-07-20 18:36:35,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:35,030 INFO L93 Difference]: Finished difference Result 128026 states and 205311 transitions. [2020-07-20 18:36:35,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 18:36:35,030 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 501 [2020-07-20 18:36:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:35,226 INFO L225 Difference]: With dead ends: 128026 [2020-07-20 18:36:35,227 INFO L226 Difference]: Without dead ends: 120862 [2020-07-20 18:36:35,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 18:36:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120862 states. [2020-07-20 18:36:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120862 to 51473. [2020-07-20 18:36:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51473 states. [2020-07-20 18:36:40,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51473 states to 51473 states and 82101 transitions. [2020-07-20 18:36:40,228 INFO L78 Accepts]: Start accepts. Automaton has 51473 states and 82101 transitions. Word has length 501 [2020-07-20 18:36:40,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:40,229 INFO L479 AbstractCegarLoop]: Abstraction has 51473 states and 82101 transitions. [2020-07-20 18:36:40,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 18:36:40,229 INFO L276 IsEmpty]: Start isEmpty. Operand 51473 states and 82101 transitions. [2020-07-20 18:36:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 18:36:40,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:40,276 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:40,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:40,491 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:40,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:40,492 INFO L82 PathProgramCache]: Analyzing trace with hash -60010913, now seen corresponding path program 1 times [2020-07-20 18:36:40,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:40,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632248946] [2020-07-20 18:36:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:40,996 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:40,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:41,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 2875 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 18:36:41,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:41,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:41,288 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:41,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632248946] [2020-07-20 18:36:41,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:41,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 18:36:41,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828296461] [2020-07-20 18:36:41,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 18:36:41,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:41,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 18:36:41,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 18:36:41,290 INFO L87 Difference]: Start difference. First operand 51473 states and 82101 transitions. Second operand 8 states. [2020-07-20 18:36:47,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:47,900 INFO L93 Difference]: Finished difference Result 97513 states and 156138 transitions. [2020-07-20 18:36:47,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 18:36:47,901 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 501 [2020-07-20 18:36:47,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:48,039 INFO L225 Difference]: With dead ends: 97513 [2020-07-20 18:36:48,039 INFO L226 Difference]: Without dead ends: 81637 [2020-07-20 18:36:48,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 18:36:48,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81637 states. [2020-07-20 18:36:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81637 to 36865. [2020-07-20 18:36:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36865 states. [2020-07-20 18:36:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36865 states to 36865 states and 58969 transitions. [2020-07-20 18:36:50,430 INFO L78 Accepts]: Start accepts. Automaton has 36865 states and 58969 transitions. Word has length 501 [2020-07-20 18:36:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:50,430 INFO L479 AbstractCegarLoop]: Abstraction has 36865 states and 58969 transitions. [2020-07-20 18:36:50,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 18:36:50,431 INFO L276 IsEmpty]: Start isEmpty. Operand 36865 states and 58969 transitions. [2020-07-20 18:36:50,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 18:36:50,456 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:50,457 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:50,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:50,658 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:50,658 INFO L82 PathProgramCache]: Analyzing trace with hash -996775512, now seen corresponding path program 1 times [2020-07-20 18:36:50,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:50,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324627690] [2020-07-20 18:36:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:51,177 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:51,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:51,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 2871 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:51,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:51,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:51,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324627690] [2020-07-20 18:36:51,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:51,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:51,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71998477] [2020-07-20 18:36:51,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:51,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:51,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:51,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:51,313 INFO L87 Difference]: Start difference. First operand 36865 states and 58969 transitions. Second operand 3 states. [2020-07-20 18:36:55,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:55,020 INFO L93 Difference]: Finished difference Result 74849 states and 118778 transitions. [2020-07-20 18:36:55,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:55,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-20 18:36:55,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:55,073 INFO L225 Difference]: With dead ends: 74849 [2020-07-20 18:36:55,073 INFO L226 Difference]: Without dead ends: 48573 [2020-07-20 18:36:55,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:55,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48573 states. [2020-07-20 18:36:57,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48573 to 43649. [2020-07-20 18:36:57,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43649 states. [2020-07-20 18:36:57,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43649 states to 43649 states and 69949 transitions. [2020-07-20 18:36:57,651 INFO L78 Accepts]: Start accepts. Automaton has 43649 states and 69949 transitions. Word has length 501 [2020-07-20 18:36:57,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:57,652 INFO L479 AbstractCegarLoop]: Abstraction has 43649 states and 69949 transitions. [2020-07-20 18:36:57,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:57,653 INFO L276 IsEmpty]: Start isEmpty. Operand 43649 states and 69949 transitions. [2020-07-20 18:36:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 18:36:57,679 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:57,680 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:57,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:57,886 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:57,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:57,887 INFO L82 PathProgramCache]: Analyzing trace with hash -429274846, now seen corresponding path program 1 times [2020-07-20 18:36:57,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:57,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [101516739] [2020-07-20 18:36:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:58,390 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:58,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:58,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 2876 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:36:58,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:58,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:58,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [101516739] [2020-07-20 18:36:58,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:58,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 18:36:58,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157067050] [2020-07-20 18:36:58,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 18:36:58,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:58,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 18:36:58,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:36:58,793 INFO L87 Difference]: Start difference. First operand 43649 states and 69949 transitions. Second operand 5 states. [2020-07-20 18:37:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:37:04,961 INFO L93 Difference]: Finished difference Result 96379 states and 154086 transitions. [2020-07-20 18:37:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:37:04,962 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 502 [2020-07-20 18:37:04,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:37:05,043 INFO L225 Difference]: With dead ends: 96379 [2020-07-20 18:37:05,043 INFO L226 Difference]: Without dead ends: 77347 [2020-07-20 18:37:05,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 18:37:05,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77347 states. [2020-07-20 18:37:09,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77347 to 77345. [2020-07-20 18:37:09,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77345 states. [2020-07-20 18:37:09,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77345 states to 77345 states and 122817 transitions. [2020-07-20 18:37:09,879 INFO L78 Accepts]: Start accepts. Automaton has 77345 states and 122817 transitions. Word has length 502 [2020-07-20 18:37:09,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:37:09,880 INFO L479 AbstractCegarLoop]: Abstraction has 77345 states and 122817 transitions. [2020-07-20 18:37:09,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 18:37:09,881 INFO L276 IsEmpty]: Start isEmpty. Operand 77345 states and 122817 transitions. [2020-07-20 18:37:09,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 18:37:09,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:37:09,933 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:37:10,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:37:10,146 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:37:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:37:10,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1111657017, now seen corresponding path program 1 times [2020-07-20 18:37:10,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:37:10,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744438213] [2020-07-20 18:37:10,148 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:37:12,239 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:37:12,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:37:12,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 2877 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:37:12,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:37:12,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:37:12,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:37:12,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744438213] [2020-07-20 18:37:12,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:37:12,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:37:12,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292427184] [2020-07-20 18:37:12,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:37:12,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:37:12,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:37:12,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:37:12,453 INFO L87 Difference]: Start difference. First operand 77345 states and 122817 transitions. Second operand 4 states. [2020-07-20 18:37:22,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:37:22,130 INFO L93 Difference]: Finished difference Result 228875 states and 363464 transitions. [2020-07-20 18:37:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:37:22,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-20 18:37:22,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:37:22,324 INFO L225 Difference]: With dead ends: 228875 [2020-07-20 18:37:22,324 INFO L226 Difference]: Without dead ends: 151793 [2020-07-20 18:37:22,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:37:22,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151793 states. [2020-07-20 18:37:34,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151793 to 151748. [2020-07-20 18:37:34,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151748 states. [2020-07-20 18:37:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151748 states to 151748 states and 240308 transitions. [2020-07-20 18:37:34,921 INFO L78 Accepts]: Start accepts. Automaton has 151748 states and 240308 transitions. Word has length 502 [2020-07-20 18:37:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:37:34,922 INFO L479 AbstractCegarLoop]: Abstraction has 151748 states and 240308 transitions. [2020-07-20 18:37:34,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:37:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 151748 states and 240308 transitions. [2020-07-20 18:37:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 18:37:34,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:37:34,994 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:37:35,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:37:35,195 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:37:35,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:37:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash -568171736, now seen corresponding path program 1 times [2020-07-20 18:37:35,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:37:35,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323446409] [2020-07-20 18:37:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:37:35,703 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:37:35,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:37:35,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 2878 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:37:35,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:37:35,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:37:35,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:37:35,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323446409] [2020-07-20 18:37:35,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:37:35,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:37:35,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509491390] [2020-07-20 18:37:35,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:37:35,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:37:35,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:37:35,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:37:35,958 INFO L87 Difference]: Start difference. First operand 151748 states and 240308 transitions. Second operand 3 states. [2020-07-20 18:37:58,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:37:58,088 INFO L93 Difference]: Finished difference Result 446747 states and 706889 transitions. [2020-07-20 18:37:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:37:58,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-20 18:37:58,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:37:58,436 INFO L225 Difference]: With dead ends: 446747 [2020-07-20 18:37:58,437 INFO L226 Difference]: Without dead ends: 298567 [2020-07-20 18:37:58,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:37:58,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298567 states. [2020-07-20 18:38:23,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298567 to 298524. [2020-07-20 18:38:23,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298524 states. [2020-07-20 18:38:23,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298524 states to 298524 states and 471639 transitions. [2020-07-20 18:38:23,788 INFO L78 Accepts]: Start accepts. Automaton has 298524 states and 471639 transitions. Word has length 504 [2020-07-20 18:38:23,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:38:23,788 INFO L479 AbstractCegarLoop]: Abstraction has 298524 states and 471639 transitions. [2020-07-20 18:38:23,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:38:23,788 INFO L276 IsEmpty]: Start isEmpty. Operand 298524 states and 471639 transitions. [2020-07-20 18:38:23,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 18:38:23,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:38:23,951 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:38:24,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:38:24,152 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:38:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:38:24,153 INFO L82 PathProgramCache]: Analyzing trace with hash -889590416, now seen corresponding path program 1 times [2020-07-20 18:38:24,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:38:24,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523420454] [2020-07-20 18:38:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:38:24,486 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:38:24,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:38:24,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:38:24,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:38:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:38:25,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:38:25,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523420454] [2020-07-20 18:38:25,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:38:25,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:38:25,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408014541] [2020-07-20 18:38:25,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:38:25,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:38:25,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:38:25,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:38:25,186 INFO L87 Difference]: Start difference. First operand 298524 states and 471639 transitions. Second operand 3 states. [2020-07-20 18:39:14,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:39:14,430 INFO L93 Difference]: Finished difference Result 874942 states and 1378284 transitions. [2020-07-20 18:39:14,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:39:14,431 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-20 18:39:14,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:39:15,253 INFO L225 Difference]: With dead ends: 874942 [2020-07-20 18:39:15,253 INFO L226 Difference]: Without dead ends: 586788 [2020-07-20 18:39:15,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:39:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586788 states. [2020-07-20 18:39:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586788 to 300348. [2020-07-20 18:39:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300348 states. [2020-07-20 18:39:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300348 states to 300348 states and 474398 transitions. [2020-07-20 18:39:47,704 INFO L78 Accepts]: Start accepts. Automaton has 300348 states and 474398 transitions. Word has length 504 [2020-07-20 18:39:47,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:39:47,704 INFO L479 AbstractCegarLoop]: Abstraction has 300348 states and 474398 transitions. [2020-07-20 18:39:47,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:39:47,704 INFO L276 IsEmpty]: Start isEmpty. Operand 300348 states and 474398 transitions. [2020-07-20 18:39:47,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 18:39:47,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:39:47,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:39:48,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:39:48,080 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:39:48,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:39:48,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1898786872, now seen corresponding path program 1 times [2020-07-20 18:39:48,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:39:48,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728177381] [2020-07-20 18:39:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:39:48,416 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:39:48,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:39:48,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1430 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:39:48,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:39:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:39:48,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:39:48,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728177381] [2020-07-20 18:39:48,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:39:48,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:39:48,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21934473] [2020-07-20 18:39:48,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:39:48,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:39:48,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:39:48,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:39:48,545 INFO L87 Difference]: Start difference. First operand 300348 states and 474398 transitions. Second operand 4 states. [2020-07-20 18:40:38,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:40:38,862 INFO L93 Difference]: Finished difference Result 854924 states and 1343795 transitions. [2020-07-20 18:40:38,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:40:38,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-20 18:40:38,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:40:39,739 INFO L225 Difference]: With dead ends: 854924 [2020-07-20 18:40:39,739 INFO L226 Difference]: Without dead ends: 577188 [2020-07-20 18:40:39,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:40:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577188 states. [2020-07-20 18:41:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577188 to 311750. [2020-07-20 18:41:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311750 states. [2020-07-20 18:41:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311750 states to 311750 states and 494435 transitions. [2020-07-20 18:41:14,207 INFO L78 Accepts]: Start accepts. Automaton has 311750 states and 494435 transitions. Word has length 505 [2020-07-20 18:41:14,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:41:14,207 INFO L479 AbstractCegarLoop]: Abstraction has 311750 states and 494435 transitions. [2020-07-20 18:41:14,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:41:14,207 INFO L276 IsEmpty]: Start isEmpty. Operand 311750 states and 494435 transitions. [2020-07-20 18:41:14,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 18:41:14,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:41:14,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:41:14,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:41:14,577 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:41:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:41:14,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1954941271, now seen corresponding path program 1 times [2020-07-20 18:41:14,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:41:14,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754511758] [2020-07-20 18:41:14,579 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:41:15,085 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:41:15,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:41:15,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 2877 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:41:15,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:41:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:41:15,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:41:15,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754511758] [2020-07-20 18:41:15,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:41:15,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:41:15,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006154018] [2020-07-20 18:41:15,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:41:15,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:41:15,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:41:15,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:41:15,256 INFO L87 Difference]: Start difference. First operand 311750 states and 494435 transitions. Second operand 3 states. [2020-07-20 18:42:02,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:42:02,179 INFO L93 Difference]: Finished difference Result 741886 states and 1176020 transitions. [2020-07-20 18:42:02,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:42:02,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 505 [2020-07-20 18:42:02,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:42:02,824 INFO L225 Difference]: With dead ends: 741886 [2020-07-20 18:42:02,824 INFO L226 Difference]: Without dead ends: 487846 [2020-07-20 18:42:03,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:42:03,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487846 states. [2020-07-20 18:42:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487846 to 439318. [2020-07-20 18:42:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439318 states. [2020-07-20 18:42:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439318 states to 439318 states and 699315 transitions. [2020-07-20 18:42:49,734 INFO L78 Accepts]: Start accepts. Automaton has 439318 states and 699315 transitions. Word has length 505 [2020-07-20 18:42:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:42:49,734 INFO L479 AbstractCegarLoop]: Abstraction has 439318 states and 699315 transitions. [2020-07-20 18:42:49,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:42:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 439318 states and 699315 transitions. [2020-07-20 18:42:49,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 18:42:49,887 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:42:49,887 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:42:50,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:42:50,088 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:42:50,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:42:50,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1059422141, now seen corresponding path program 1 times [2020-07-20 18:42:50,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:42:50,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613014134] [2020-07-20 18:42:50,090 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:42:50,610 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:42:50,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:42:50,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 2882 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:42:50,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:42:51,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:42:51,058 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:42:51,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613014134] [2020-07-20 18:42:51,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:42:51,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:42:51,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666505473] [2020-07-20 18:42:51,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:42:51,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:42:51,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:42:51,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:42:51,061 INFO L87 Difference]: Start difference. First operand 439318 states and 699315 transitions. Second operand 3 states. [2020-07-20 18:44:20,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:44:20,100 INFO L93 Difference]: Finished difference Result 1302839 states and 2073643 transitions. [2020-07-20 18:44:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:44:20,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 506 [2020-07-20 18:44:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:44:21,433 INFO L225 Difference]: With dead ends: 1302839 [2020-07-20 18:44:21,433 INFO L226 Difference]: Without dead ends: 867535 [2020-07-20 18:44:21,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:44:22,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 867535 states. [2020-07-20 18:46:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 867535 to 867494. [2020-07-20 18:46:02,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 867494 states. [2020-07-20 18:46:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867494 states to 867494 states and 1376452 transitions. [2020-07-20 18:46:04,394 INFO L78 Accepts]: Start accepts. Automaton has 867494 states and 1376452 transitions. Word has length 506 [2020-07-20 18:46:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:46:04,395 INFO L479 AbstractCegarLoop]: Abstraction has 867494 states and 1376452 transitions. [2020-07-20 18:46:04,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:46:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand 867494 states and 1376452 transitions. [2020-07-20 18:46:04,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-20 18:46:04,773 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:46:04,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:46:04,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:46:04,974 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:46:04,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:46:04,975 INFO L82 PathProgramCache]: Analyzing trace with hash -800189058, now seen corresponding path program 1 times [2020-07-20 18:46:04,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:46:04,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286295742] [2020-07-20 18:46:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:46:05,500 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:46:05,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:46:05,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 2882 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:46:05,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:46:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:46:05,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:46:05,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286295742] [2020-07-20 18:46:05,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:46:05,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:46:05,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044355039] [2020-07-20 18:46:05,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:46:05,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:46:05,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:46:05,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:46:05,702 INFO L87 Difference]: Start difference. First operand 867494 states and 1376452 transitions. Second operand 3 states.