/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:43:12,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:43:12,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:43:12,466 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:43:12,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:43:12,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:43:12,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:43:12,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:43:12,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:43:12,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:43:12,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:43:12,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:43:12,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:43:12,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:43:12,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:43:12,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:43:12,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:43:12,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:43:12,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:43:12,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:43:12,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:43:12,487 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:43:12,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:43:12,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:43:12,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 14:43:12,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 14:43:12,494 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 14:43:12,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 14:43:12,497 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 14:43:12,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 14:43:12,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 14:43:12,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 14:43:12,501 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 14:43:12,502 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 14:43:12,506 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 14:43:12,507 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 14:43:12,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 14:43:12,510 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 14:43:12,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:43:12,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:43:12,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:43:12,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 14:43:12,542 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:43:12,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:43:12,544 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:43:12,544 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:43:12,544 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:43:12,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:43:12,545 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:43:12,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:43:12,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:43:12,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:43:12,547 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:43:12,547 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:43:12,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:43:12,548 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:43:12,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:43:12,548 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:43:12,549 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:43:12,549 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:43:12,549 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:43:12,549 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:43:12,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:43:12,550 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:43:12,550 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:43:12,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:43:12,550 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:43:12,550 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:43:12,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:12,551 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:43:12,551 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:43:12,551 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:43:12,826 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:43:12,849 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:43:12,852 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:43:12,853 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:43:12,854 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:43:12,854 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 14:43:12,924 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52bb8fc31/d7dd61d3fbbf49acbe4702259641256b/FLAG89e87584e [2020-07-21 14:43:13,616 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:43:13,617 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 14:43:13,647 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52bb8fc31/d7dd61d3fbbf49acbe4702259641256b/FLAG89e87584e [2020-07-21 14:43:13,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52bb8fc31/d7dd61d3fbbf49acbe4702259641256b [2020-07-21 14:43:13,772 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:43:13,775 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:43:13,776 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:43:13,776 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:43:13,780 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:43:13,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:43:13" (1/1) ... [2020-07-21 14:43:13,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51833862 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:13, skipping insertion in model container [2020-07-21 14:43:13,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:43:13" (1/1) ... [2020-07-21 14:43:13,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:43:13,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:43:15,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:43:15,469 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:43:16,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:43:16,594 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:43:16,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:16 WrapperNode [2020-07-21 14:43:16,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:43:16,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:43:16,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:43:16,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:43:16,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:16" (1/1) ... [2020-07-21 14:43:16,614 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:16" (1/1) ... [2020-07-21 14:43:16,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:16" (1/1) ... [2020-07-21 14:43:16,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:16" (1/1) ... [2020-07-21 14:43:16,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:16" (1/1) ... [2020-07-21 14:43:16,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:16" (1/1) ... [2020-07-21 14:43:16,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:16" (1/1) ... [2020-07-21 14:43:16,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:43:16,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:43:16,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:43:16,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:43:16,854 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:43:16,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:43:16,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:43:16,944 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:43:16,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:43:16,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:43:16,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:43:16,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 14:43:16,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:43:16,946 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:43:16,946 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:43:16,947 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:43:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:43:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:43:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:43:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:43:16,949 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:43:16,949 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:43:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 14:43:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:43:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:43:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:43:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:43:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:43:21,511 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:43:21,511 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:43:21,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:43:21 BoogieIcfgContainer [2020-07-21 14:43:21,523 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:43:21,524 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:43:21,524 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:43:21,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:43:21,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:43:13" (1/3) ... [2020-07-21 14:43:21,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce51db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:43:21, skipping insertion in model container [2020-07-21 14:43:21,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:43:16" (2/3) ... [2020-07-21 14:43:21,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce51db0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:43:21, skipping insertion in model container [2020-07-21 14:43:21,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:43:21" (3/3) ... [2020-07-21 14:43:21,531 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 14:43:21,542 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:43:21,551 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:43:21,564 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:43:21,593 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:43:21,593 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:43:21,594 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:43:21,594 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:43:21,594 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:43:21,594 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:43:21,594 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:43:21,594 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:43:21,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2020-07-21 14:43:21,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 14:43:21,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:21,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:21,680 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:21,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:21,686 INFO L82 PathProgramCache]: Analyzing trace with hash -866812329, now seen corresponding path program 1 times [2020-07-21 14:43:21,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:21,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085350167] [2020-07-21 14:43:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:22,304 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:22,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:22,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:43:22,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:22,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:22,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085350167] [2020-07-21 14:43:22,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:22,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:22,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516268201] [2020-07-21 14:43:22,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:22,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:22,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:22,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:22,779 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 4 states. [2020-07-21 14:43:23,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:23,247 INFO L93 Difference]: Finished difference Result 3967 states and 7151 transitions. [2020-07-21 14:43:23,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:43:23,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-21 14:43:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:23,282 INFO L225 Difference]: With dead ends: 3967 [2020-07-21 14:43:23,282 INFO L226 Difference]: Without dead ends: 2636 [2020-07-21 14:43:23,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:43:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2020-07-21 14:43:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2634. [2020-07-21 14:43:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2634 states. [2020-07-21 14:43:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 4315 transitions. [2020-07-21 14:43:23,487 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 4315 transitions. Word has length 476 [2020-07-21 14:43:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:23,488 INFO L479 AbstractCegarLoop]: Abstraction has 2634 states and 4315 transitions. [2020-07-21 14:43:23,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:23,489 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 4315 transitions. [2020-07-21 14:43:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 14:43:23,503 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:23,504 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:23,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:23,719 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:23,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:23,720 INFO L82 PathProgramCache]: Analyzing trace with hash 47179568, now seen corresponding path program 1 times [2020-07-21 14:43:23,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:23,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461424864] [2020-07-21 14:43:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:24,274 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:43:24,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:24,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 2903 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:43:24,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:24,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:24,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461424864] [2020-07-21 14:43:24,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:24,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:24,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278356565] [2020-07-21 14:43:24,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:24,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:24,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:24,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:24,512 INFO L87 Difference]: Start difference. First operand 2634 states and 4315 transitions. Second operand 3 states. [2020-07-21 14:43:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:24,846 INFO L93 Difference]: Finished difference Result 4436 states and 7197 transitions. [2020-07-21 14:43:24,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:24,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 14:43:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:24,869 INFO L225 Difference]: With dead ends: 4436 [2020-07-21 14:43:24,869 INFO L226 Difference]: Without dead ends: 3930 [2020-07-21 14:43:24,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:24,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2020-07-21 14:43:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2020-07-21 14:43:25,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2020-07-21 14:43:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6348 transitions. [2020-07-21 14:43:25,020 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6348 transitions. Word has length 478 [2020-07-21 14:43:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:25,021 INFO L479 AbstractCegarLoop]: Abstraction has 3928 states and 6348 transitions. [2020-07-21 14:43:25,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:25,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6348 transitions. [2020-07-21 14:43:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 14:43:25,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:25,038 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:25,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:25,252 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:25,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:25,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1082038238, now seen corresponding path program 1 times [2020-07-21 14:43:25,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:25,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336333868] [2020-07-21 14:43:25,254 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:25,820 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:43:25,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:25,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 2904 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:25,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:26,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:26,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336333868] [2020-07-21 14:43:26,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:26,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:26,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320347766] [2020-07-21 14:43:26,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:26,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:26,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:26,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:26,100 INFO L87 Difference]: Start difference. First operand 3928 states and 6348 transitions. Second operand 3 states. [2020-07-21 14:43:26,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:26,557 INFO L93 Difference]: Finished difference Result 11482 states and 18513 transitions. [2020-07-21 14:43:26,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:26,558 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 14:43:26,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:26,610 INFO L225 Difference]: With dead ends: 11482 [2020-07-21 14:43:26,610 INFO L226 Difference]: Without dead ends: 7768 [2020-07-21 14:43:26,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:26,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2020-07-21 14:43:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7766. [2020-07-21 14:43:27,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7766 states. [2020-07-21 14:43:27,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 12509 transitions. [2020-07-21 14:43:27,067 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 12509 transitions. Word has length 478 [2020-07-21 14:43:27,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:27,068 INFO L479 AbstractCegarLoop]: Abstraction has 7766 states and 12509 transitions. [2020-07-21 14:43:27,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:27,068 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 12509 transitions. [2020-07-21 14:43:27,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 14:43:27,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:27,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:27,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:27,310 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:27,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2101540850, now seen corresponding path program 1 times [2020-07-21 14:43:27,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:27,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191299400] [2020-07-21 14:43:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:27,680 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:27,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:27,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1577 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:27,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:27,868 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:27,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191299400] [2020-07-21 14:43:27,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:27,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:27,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223356575] [2020-07-21 14:43:27,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:27,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:27,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:27,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:27,872 INFO L87 Difference]: Start difference. First operand 7766 states and 12509 transitions. Second operand 3 states. [2020-07-21 14:43:28,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:28,372 INFO L93 Difference]: Finished difference Result 23201 states and 37359 transitions. [2020-07-21 14:43:28,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:28,373 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-21 14:43:28,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:28,456 INFO L225 Difference]: With dead ends: 23201 [2020-07-21 14:43:28,457 INFO L226 Difference]: Without dead ends: 15487 [2020-07-21 14:43:28,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:28,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15487 states. [2020-07-21 14:43:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15487 to 7813. [2020-07-21 14:43:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7813 states. [2020-07-21 14:43:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7813 states to 7813 states and 12583 transitions. [2020-07-21 14:43:28,913 INFO L78 Accepts]: Start accepts. Automaton has 7813 states and 12583 transitions. Word has length 479 [2020-07-21 14:43:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:28,913 INFO L479 AbstractCegarLoop]: Abstraction has 7813 states and 12583 transitions. [2020-07-21 14:43:28,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 7813 states and 12583 transitions. [2020-07-21 14:43:28,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 14:43:28,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:28,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:29,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:29,152 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1016409383, now seen corresponding path program 1 times [2020-07-21 14:43:29,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:29,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600270014] [2020-07-21 14:43:29,153 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:29,548 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:29,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:29,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1577 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:43:29,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:29,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:29,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600270014] [2020-07-21 14:43:29,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:29,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:29,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363205493] [2020-07-21 14:43:29,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:29,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:29,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:29,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:29,769 INFO L87 Difference]: Start difference. First operand 7813 states and 12583 transitions. Second operand 4 states. [2020-07-21 14:43:30,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:30,251 INFO L93 Difference]: Finished difference Result 17504 states and 28374 transitions. [2020-07-21 14:43:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:30,252 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-21 14:43:30,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:30,273 INFO L225 Difference]: With dead ends: 17504 [2020-07-21 14:43:30,278 INFO L226 Difference]: Without dead ends: 8956 [2020-07-21 14:43:30,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:43:30,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8956 states. [2020-07-21 14:43:30,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8956 to 8954. [2020-07-21 14:43:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8954 states. [2020-07-21 14:43:30,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8954 states to 8954 states and 14497 transitions. [2020-07-21 14:43:30,642 INFO L78 Accepts]: Start accepts. Automaton has 8954 states and 14497 transitions. Word has length 480 [2020-07-21 14:43:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:30,643 INFO L479 AbstractCegarLoop]: Abstraction has 8954 states and 14497 transitions. [2020-07-21 14:43:30,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:30,643 INFO L276 IsEmpty]: Start isEmpty. Operand 8954 states and 14497 transitions. [2020-07-21 14:43:30,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 14:43:30,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:30,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:30,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:30,884 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:30,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:30,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1586761466, now seen corresponding path program 1 times [2020-07-21 14:43:30,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:30,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408616397] [2020-07-21 14:43:30,885 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:31,444 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:43:31,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:31,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 2911 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:31,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:31,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:31,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:31,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408616397] [2020-07-21 14:43:31,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:31,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:31,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309920711] [2020-07-21 14:43:31,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:31,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:31,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:31,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:31,651 INFO L87 Difference]: Start difference. First operand 8954 states and 14497 transitions. Second operand 3 states. [2020-07-21 14:43:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:32,324 INFO L93 Difference]: Finished difference Result 25767 states and 41558 transitions. [2020-07-21 14:43:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:32,324 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 14:43:32,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:32,364 INFO L225 Difference]: With dead ends: 25767 [2020-07-21 14:43:32,365 INFO L226 Difference]: Without dead ends: 17521 [2020-07-21 14:43:32,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17521 states. [2020-07-21 14:43:32,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17521 to 17519. [2020-07-21 14:43:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17519 states. [2020-07-21 14:43:32,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17519 states to 17519 states and 28229 transitions. [2020-07-21 14:43:32,968 INFO L78 Accepts]: Start accepts. Automaton has 17519 states and 28229 transitions. Word has length 482 [2020-07-21 14:43:32,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:32,969 INFO L479 AbstractCegarLoop]: Abstraction has 17519 states and 28229 transitions. [2020-07-21 14:43:32,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:32,969 INFO L276 IsEmpty]: Start isEmpty. Operand 17519 states and 28229 transitions. [2020-07-21 14:43:33,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 14:43:33,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:33,006 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:33,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:33,221 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:33,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:33,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1235675745, now seen corresponding path program 1 times [2020-07-21 14:43:33,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:33,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550280020] [2020-07-21 14:43:33,222 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:33,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:33,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:33,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:33,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:33,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:33,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550280020] [2020-07-21 14:43:33,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:33,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:33,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692636327] [2020-07-21 14:43:33,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:33,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:33,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:33,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:33,772 INFO L87 Difference]: Start difference. First operand 17519 states and 28229 transitions. Second operand 3 states. [2020-07-21 14:43:34,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:34,320 INFO L93 Difference]: Finished difference Result 52204 states and 84059 transitions. [2020-07-21 14:43:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:34,321 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 14:43:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:34,400 INFO L225 Difference]: With dead ends: 52204 [2020-07-21 14:43:34,401 INFO L226 Difference]: Without dead ends: 34864 [2020-07-21 14:43:34,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34864 states. [2020-07-21 14:43:35,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34864 to 17638. [2020-07-21 14:43:35,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17638 states. [2020-07-21 14:43:35,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17638 states to 17638 states and 28388 transitions. [2020-07-21 14:43:35,450 INFO L78 Accepts]: Start accepts. Automaton has 17638 states and 28388 transitions. Word has length 482 [2020-07-21 14:43:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:35,450 INFO L479 AbstractCegarLoop]: Abstraction has 17638 states and 28388 transitions. [2020-07-21 14:43:35,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 17638 states and 28388 transitions. [2020-07-21 14:43:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 14:43:35,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:35,480 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] [2020-07-21 14:43:35,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:35,696 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:35,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2045457908, now seen corresponding path program 1 times [2020-07-21 14:43:35,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:35,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718400175] [2020-07-21 14:43:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:36,034 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:36,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:36,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:36,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:36,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:36,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718400175] [2020-07-21 14:43:36,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:36,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:36,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148098164] [2020-07-21 14:43:36,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:36,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:36,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:36,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:36,140 INFO L87 Difference]: Start difference. First operand 17638 states and 28388 transitions. Second operand 3 states. [2020-07-21 14:43:37,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:37,334 INFO L93 Difference]: Finished difference Result 52456 states and 84408 transitions. [2020-07-21 14:43:37,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:37,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 14:43:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:37,451 INFO L225 Difference]: With dead ends: 52456 [2020-07-21 14:43:37,451 INFO L226 Difference]: Without dead ends: 35067 [2020-07-21 14:43:37,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35067 states. [2020-07-21 14:43:38,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35067 to 17841. [2020-07-21 14:43:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17841 states. [2020-07-21 14:43:38,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17841 states to 17841 states and 28670 transitions. [2020-07-21 14:43:38,406 INFO L78 Accepts]: Start accepts. Automaton has 17841 states and 28670 transitions. Word has length 483 [2020-07-21 14:43:38,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:38,406 INFO L479 AbstractCegarLoop]: Abstraction has 17841 states and 28670 transitions. [2020-07-21 14:43:38,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:38,406 INFO L276 IsEmpty]: Start isEmpty. Operand 17841 states and 28670 transitions. [2020-07-21 14:43:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 14:43:38,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:38,426 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] [2020-07-21 14:43:38,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:38,632 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:38,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:38,634 INFO L82 PathProgramCache]: Analyzing trace with hash 103152971, now seen corresponding path program 1 times [2020-07-21 14:43:38,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:38,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117492362] [2020-07-21 14:43:38,635 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:38,993 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:38,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:38,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 1580 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:43:39,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:39,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:39,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:39,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117492362] [2020-07-21 14:43:39,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:39,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:43:39,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280204400] [2020-07-21 14:43:39,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:43:39,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:39,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:43:39,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:43:39,153 INFO L87 Difference]: Start difference. First operand 17841 states and 28670 transitions. Second operand 4 states. [2020-07-21 14:43:40,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:40,761 INFO L93 Difference]: Finished difference Result 40734 states and 65893 transitions. [2020-07-21 14:43:40,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:43:40,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-21 14:43:40,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:40,802 INFO L225 Difference]: With dead ends: 40734 [2020-07-21 14:43:40,802 INFO L226 Difference]: Without dead ends: 21146 [2020-07-21 14:43:40,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:43:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21146 states. [2020-07-21 14:43:41,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21146 to 21144. [2020-07-21 14:43:41,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21144 states. [2020-07-21 14:43:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21144 states to 21144 states and 34132 transitions. [2020-07-21 14:43:41,479 INFO L78 Accepts]: Start accepts. Automaton has 21144 states and 34132 transitions. Word has length 484 [2020-07-21 14:43:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:41,479 INFO L479 AbstractCegarLoop]: Abstraction has 21144 states and 34132 transitions. [2020-07-21 14:43:41,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:43:41,480 INFO L276 IsEmpty]: Start isEmpty. Operand 21144 states and 34132 transitions. [2020-07-21 14:43:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 14:43:41,498 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:41,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:41,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:41,699 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:41,700 INFO L82 PathProgramCache]: Analyzing trace with hash -645989766, now seen corresponding path program 1 times [2020-07-21 14:43:41,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:41,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171966540] [2020-07-21 14:43:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:42,047 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:42,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:42,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:42,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:42,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:42,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171966540] [2020-07-21 14:43:42,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:42,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:42,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588889292] [2020-07-21 14:43:42,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:42,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:42,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:42,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:42,160 INFO L87 Difference]: Start difference. First operand 21144 states and 34132 transitions. Second operand 3 states. [2020-07-21 14:43:43,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:43,286 INFO L93 Difference]: Finished difference Result 59784 states and 96219 transitions. [2020-07-21 14:43:43,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:43,286 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 14:43:43,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:43,353 INFO L225 Difference]: With dead ends: 59784 [2020-07-21 14:43:43,354 INFO L226 Difference]: Without dead ends: 40474 [2020-07-21 14:43:43,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:43,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40474 states. [2020-07-21 14:43:44,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40474 to 21344. [2020-07-21 14:43:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21344 states. [2020-07-21 14:43:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21344 states to 21344 states and 34419 transitions. [2020-07-21 14:43:44,198 INFO L78 Accepts]: Start accepts. Automaton has 21344 states and 34419 transitions. Word has length 487 [2020-07-21 14:43:44,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:44,198 INFO L479 AbstractCegarLoop]: Abstraction has 21344 states and 34419 transitions. [2020-07-21 14:43:44,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 21344 states and 34419 transitions. [2020-07-21 14:43:44,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 14:43:44,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:44,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:45,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:45,085 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:45,086 INFO L82 PathProgramCache]: Analyzing trace with hash -959203455, now seen corresponding path program 1 times [2020-07-21 14:43:45,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:45,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818062139] [2020-07-21 14:43:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:45,431 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:45,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:45,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:43:45,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:45,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:45,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818062139] [2020-07-21 14:43:45,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:45,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:45,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87299836] [2020-07-21 14:43:45,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:45,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:45,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:45,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:45,541 INFO L87 Difference]: Start difference. First operand 21344 states and 34419 transitions. Second operand 3 states. [2020-07-21 14:43:46,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:46,618 INFO L93 Difference]: Finished difference Result 61200 states and 98512 transitions. [2020-07-21 14:43:46,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:43:46,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 14:43:46,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:46,666 INFO L225 Difference]: With dead ends: 61200 [2020-07-21 14:43:46,666 INFO L226 Difference]: Without dead ends: 41280 [2020-07-21 14:43:46,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41280 states. [2020-07-21 14:43:47,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41280 to 21522. [2020-07-21 14:43:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21522 states. [2020-07-21 14:43:47,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21522 states to 21522 states and 34676 transitions. [2020-07-21 14:43:47,657 INFO L78 Accepts]: Start accepts. Automaton has 21522 states and 34676 transitions. Word has length 487 [2020-07-21 14:43:47,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:47,657 INFO L479 AbstractCegarLoop]: Abstraction has 21522 states and 34676 transitions. [2020-07-21 14:43:47,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:43:47,657 INFO L276 IsEmpty]: Start isEmpty. Operand 21522 states and 34676 transitions. [2020-07-21 14:43:47,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:43:47,681 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:47,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:47,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:47,897 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:47,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:47,898 INFO L82 PathProgramCache]: Analyzing trace with hash -509137109, now seen corresponding path program 1 times [2020-07-21 14:43:47,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:47,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817945200] [2020-07-21 14:43:47,899 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:48,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:43:48,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 14:43:48,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:48,439 INFO L320 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 2, 1] term [2020-07-21 14:43:48,439 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:43:48,605 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:48,667 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:48,720 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:48,723 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:48,723 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:48,726 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:43:49,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:49,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:49,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817945200] [2020-07-21 14:43:49,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:49,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-21 14:43:49,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570581034] [2020-07-21 14:43:49,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 14:43:49,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:49,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 14:43:49,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:43:49,535 INFO L87 Difference]: Start difference. First operand 21522 states and 34676 transitions. Second operand 12 states. [2020-07-21 14:43:49,704 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-07-21 14:43:51,859 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-07-21 14:43:52,892 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-07-21 14:43:55,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:43:55,807 INFO L93 Difference]: Finished difference Result 33097 states and 52582 transitions. [2020-07-21 14:43:55,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 14:43:55,807 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 488 [2020-07-21 14:43:55,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:43:55,853 INFO L225 Difference]: With dead ends: 33097 [2020-07-21 14:43:55,853 INFO L226 Difference]: Without dead ends: 30319 [2020-07-21 14:43:55,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 476 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2020-07-21 14:43:55,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30319 states. [2020-07-21 14:43:57,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30319 to 23096. [2020-07-21 14:43:57,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23096 states. [2020-07-21 14:43:57,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23096 states to 23096 states and 37003 transitions. [2020-07-21 14:43:57,646 INFO L78 Accepts]: Start accepts. Automaton has 23096 states and 37003 transitions. Word has length 488 [2020-07-21 14:43:57,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:43:57,647 INFO L479 AbstractCegarLoop]: Abstraction has 23096 states and 37003 transitions. [2020-07-21 14:43:57,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 14:43:57,647 INFO L276 IsEmpty]: Start isEmpty. Operand 23096 states and 37003 transitions. [2020-07-21 14:43:57,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:43:57,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:43:57,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:43:57,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:57,866 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:43:57,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:43:57,867 INFO L82 PathProgramCache]: Analyzing trace with hash 404011213, now seen corresponding path program 1 times [2020-07-21 14:43:57,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:43:57,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106246395] [2020-07-21 14:43:57,869 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:43:58,386 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:43:58,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:43:58,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 2934 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:43:58,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:43:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:43:58,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:43:58,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106246395] [2020-07-21 14:43:58,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:43:58,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:43:58,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655950974] [2020-07-21 14:43:58,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:43:58,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:43:58,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:43:58,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:43:58,540 INFO L87 Difference]: Start difference. First operand 23096 states and 37003 transitions. Second operand 3 states. [2020-07-21 14:44:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:01,121 INFO L93 Difference]: Finished difference Result 47017 states and 73587 transitions. [2020-07-21 14:44:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:44:01,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 14:44:01,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:01,159 INFO L225 Difference]: With dead ends: 47017 [2020-07-21 14:44:01,160 INFO L226 Difference]: Without dead ends: 33958 [2020-07-21 14:44:01,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:01,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33958 states. [2020-07-21 14:44:03,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33958 to 33956. [2020-07-21 14:44:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33956 states. [2020-07-21 14:44:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33956 states to 33956 states and 53361 transitions. [2020-07-21 14:44:03,775 INFO L78 Accepts]: Start accepts. Automaton has 33956 states and 53361 transitions. Word has length 488 [2020-07-21 14:44:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:03,775 INFO L479 AbstractCegarLoop]: Abstraction has 33956 states and 53361 transitions. [2020-07-21 14:44:03,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:44:03,776 INFO L276 IsEmpty]: Start isEmpty. Operand 33956 states and 53361 transitions. [2020-07-21 14:44:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:44:03,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:03,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:04,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:04,001 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:04,002 INFO L82 PathProgramCache]: Analyzing trace with hash -2023298158, now seen corresponding path program 1 times [2020-07-21 14:44:04,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:04,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462418465] [2020-07-21 14:44:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:04,372 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:04,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:04,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1601 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 14:44:04,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:04,464 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:44:04,494 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:44:04,520 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:44:04,679 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:44:04,731 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 14:44:04,732 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 14:44:04,733 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 14:44:04,982 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:44:05,047 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 14:44:05,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:44:05,904 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:05,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462418465] [2020-07-21 14:44:05,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:05,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-21 14:44:05,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980195565] [2020-07-21 14:44:05,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 14:44:05,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:05,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 14:44:05,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-21 14:44:05,906 INFO L87 Difference]: Start difference. First operand 33956 states and 53361 transitions. Second operand 13 states. [2020-07-21 14:44:06,101 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-07-21 14:44:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:14,160 INFO L93 Difference]: Finished difference Result 51379 states and 80914 transitions. [2020-07-21 14:44:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 14:44:14,160 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 488 [2020-07-21 14:44:14,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:14,208 INFO L225 Difference]: With dead ends: 51379 [2020-07-21 14:44:14,209 INFO L226 Difference]: Without dead ends: 47709 [2020-07-21 14:44:14,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 473 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=489, Unknown=0, NotChecked=0, Total=650 [2020-07-21 14:44:14,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47709 states. [2020-07-21 14:44:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47709 to 35560. [2020-07-21 14:44:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35560 states. [2020-07-21 14:44:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35560 states to 35560 states and 55685 transitions. [2020-07-21 14:44:16,210 INFO L78 Accepts]: Start accepts. Automaton has 35560 states and 55685 transitions. Word has length 488 [2020-07-21 14:44:16,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:16,211 INFO L479 AbstractCegarLoop]: Abstraction has 35560 states and 55685 transitions. [2020-07-21 14:44:16,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 14:44:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 35560 states and 55685 transitions. [2020-07-21 14:44:16,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:44:16,237 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:16,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:16,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:16,438 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:16,439 INFO L82 PathProgramCache]: Analyzing trace with hash 149190520, now seen corresponding path program 1 times [2020-07-21 14:44:16,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:16,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560936410] [2020-07-21 14:44:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:16,971 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:44:16,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:16,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 2933 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:44:16,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:44:17,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:17,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560936410] [2020-07-21 14:44:17,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:17,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:44:17,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376771285] [2020-07-21 14:44:17,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:44:17,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:17,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:44:17,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:44:17,205 INFO L87 Difference]: Start difference. First operand 35560 states and 55685 transitions. Second operand 4 states. [2020-07-21 14:44:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:20,814 INFO L93 Difference]: Finished difference Result 103502 states and 162015 transitions. [2020-07-21 14:44:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:44:20,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 14:44:20,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:20,886 INFO L225 Difference]: With dead ends: 103502 [2020-07-21 14:44:20,886 INFO L226 Difference]: Without dead ends: 68827 [2020-07-21 14:44:20,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:44:20,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68827 states. [2020-07-21 14:44:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68827 to 68825. [2020-07-21 14:44:25,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68825 states. [2020-07-21 14:44:25,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68825 states to 68825 states and 107333 transitions. [2020-07-21 14:44:25,823 INFO L78 Accepts]: Start accepts. Automaton has 68825 states and 107333 transitions. Word has length 488 [2020-07-21 14:44:25,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:25,823 INFO L479 AbstractCegarLoop]: Abstraction has 68825 states and 107333 transitions. [2020-07-21 14:44:25,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:44:25,824 INFO L276 IsEmpty]: Start isEmpty. Operand 68825 states and 107333 transitions. [2020-07-21 14:44:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:44:25,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:25,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:26,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:26,087 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:26,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:26,088 INFO L82 PathProgramCache]: Analyzing trace with hash 14643502, now seen corresponding path program 1 times [2020-07-21 14:44:26,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:26,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1213655342] [2020-07-21 14:44:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:26,436 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:44:26,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:26,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:44:26,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:44:26,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:26,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1213655342] [2020-07-21 14:44:26,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:26,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:44:26,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265268149] [2020-07-21 14:44:26,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:44:26,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:26,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:44:26,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:26,541 INFO L87 Difference]: Start difference. First operand 68825 states and 107333 transitions. Second operand 3 states. [2020-07-21 14:44:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:34,990 INFO L93 Difference]: Finished difference Result 201154 states and 313144 transitions. [2020-07-21 14:44:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:44:34,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 14:44:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:35,119 INFO L225 Difference]: With dead ends: 201154 [2020-07-21 14:44:35,119 INFO L226 Difference]: Without dead ends: 134997 [2020-07-21 14:44:35,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134997 states. [2020-07-21 14:44:39,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134997 to 69278. [2020-07-21 14:44:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69278 states. [2020-07-21 14:44:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69278 states to 69278 states and 107942 transitions. [2020-07-21 14:44:39,469 INFO L78 Accepts]: Start accepts. Automaton has 69278 states and 107942 transitions. Word has length 488 [2020-07-21 14:44:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:39,469 INFO L479 AbstractCegarLoop]: Abstraction has 69278 states and 107942 transitions. [2020-07-21 14:44:39,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:44:39,469 INFO L276 IsEmpty]: Start isEmpty. Operand 69278 states and 107942 transitions. [2020-07-21 14:44:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:44:39,517 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:39,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:44:39,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:39,719 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:44:39,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:44:39,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1665949070, now seen corresponding path program 1 times [2020-07-21 14:44:39,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:44:39,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455976708] [2020-07-21 14:44:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:44:40,253 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:44:40,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:44:40,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 2922 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:44:40,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:44:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:44:40,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:44:40,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455976708] [2020-07-21 14:44:40,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:44:40,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:44:40,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288434133] [2020-07-21 14:44:40,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:44:40,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:44:40,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:44:40,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:40,440 INFO L87 Difference]: Start difference. First operand 69278 states and 107942 transitions. Second operand 3 states. [2020-07-21 14:44:49,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:44:49,378 INFO L93 Difference]: Finished difference Result 201233 states and 312905 transitions. [2020-07-21 14:44:49,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:44:49,378 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 14:44:49,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:44:49,516 INFO L225 Difference]: With dead ends: 201233 [2020-07-21 14:44:49,516 INFO L226 Difference]: Without dead ends: 135904 [2020-07-21 14:44:49,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:44:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135904 states. [2020-07-21 14:44:59,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135904 to 135902. [2020-07-21 14:44:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135902 states. [2020-07-21 14:44:59,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135902 states to 135902 states and 210818 transitions. [2020-07-21 14:44:59,790 INFO L78 Accepts]: Start accepts. Automaton has 135902 states and 210818 transitions. Word has length 488 [2020-07-21 14:44:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:44:59,791 INFO L479 AbstractCegarLoop]: Abstraction has 135902 states and 210818 transitions. [2020-07-21 14:44:59,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:44:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 135902 states and 210818 transitions. [2020-07-21 14:44:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 14:44:59,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:44:59,896 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:45:00,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:00,105 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:45:00,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:45:00,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1305704341, now seen corresponding path program 1 times [2020-07-21 14:45:00,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:45:00,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999533536] [2020-07-21 14:45:00,107 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:00,455 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:45:00,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:45:00,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:45:00,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:45:00,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:45:00,574 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:45:00,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999533536] [2020-07-21 14:45:00,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:45:00,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:45:00,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040253075] [2020-07-21 14:45:00,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:45:00,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:45:00,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:45:00,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:45:00,576 INFO L87 Difference]: Start difference. First operand 135902 states and 210818 transitions. Second operand 4 states. [2020-07-21 14:45:16,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:45:16,130 INFO L93 Difference]: Finished difference Result 380845 states and 588638 transitions. [2020-07-21 14:45:16,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:45:16,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 14:45:16,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:45:16,396 INFO L225 Difference]: With dead ends: 380845 [2020-07-21 14:45:16,396 INFO L226 Difference]: Without dead ends: 253937 [2020-07-21 14:45:16,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:45:16,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253937 states. [2020-07-21 14:45:29,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253937 to 140069. [2020-07-21 14:45:29,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140069 states. [2020-07-21 14:45:29,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140069 states to 140069 states and 217608 transitions. [2020-07-21 14:45:29,424 INFO L78 Accepts]: Start accepts. Automaton has 140069 states and 217608 transitions. Word has length 488 [2020-07-21 14:45:29,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:45:29,424 INFO L479 AbstractCegarLoop]: Abstraction has 140069 states and 217608 transitions. [2020-07-21 14:45:29,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:45:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 140069 states and 217608 transitions. [2020-07-21 14:45:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 14:45:29,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:45:29,534 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] [2020-07-21 14:45:29,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:29,744 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:45:29,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:45:29,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1237468505, now seen corresponding path program 1 times [2020-07-21 14:45:29,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:45:29,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079750835] [2020-07-21 14:45:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:45:30,272 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:45:30,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:45:30,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 2936 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:45:30,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:45:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:45:30,442 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:45:30,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079750835] [2020-07-21 14:45:30,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:45:30,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:45:30,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743524166] [2020-07-21 14:45:30,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:45:30,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:45:30,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:45:30,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:45:30,444 INFO L87 Difference]: Start difference. First operand 140069 states and 217608 transitions. Second operand 3 states. [2020-07-21 14:45:50,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:45:50,052 INFO L93 Difference]: Finished difference Result 404417 states and 627351 transitions. [2020-07-21 14:45:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:45:50,053 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 14:45:50,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:45:50,350 INFO L225 Difference]: With dead ends: 404417 [2020-07-21 14:45:50,350 INFO L226 Difference]: Without dead ends: 272995 [2020-07-21 14:45:50,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:45:50,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272995 states. [2020-07-21 14:46:13,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272995 to 272993. [2020-07-21 14:46:13,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272993 states. [2020-07-21 14:46:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272993 states to 272993 states and 422017 transitions. [2020-07-21 14:46:14,313 INFO L78 Accepts]: Start accepts. Automaton has 272993 states and 422017 transitions. Word has length 490 [2020-07-21 14:46:14,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:14,313 INFO L479 AbstractCegarLoop]: Abstraction has 272993 states and 422017 transitions. [2020-07-21 14:46:14,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:14,313 INFO L276 IsEmpty]: Start isEmpty. Operand 272993 states and 422017 transitions. [2020-07-21 14:46:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 14:46:14,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:14,545 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] [2020-07-21 14:46:14,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:14,759 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:14,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:14,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1503793535, now seen corresponding path program 1 times [2020-07-21 14:46:14,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:14,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228052864] [2020-07-21 14:46:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:15,084 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:15,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:15,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:15,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:15,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:15,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:15,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228052864] [2020-07-21 14:46:15,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:15,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:15,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889810459] [2020-07-21 14:46:15,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:15,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:15,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:15,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:15,190 INFO L87 Difference]: Start difference. First operand 272993 states and 422017 transitions. Second operand 3 states. [2020-07-21 14:46:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:56,673 INFO L93 Difference]: Finished difference Result 776137 states and 1194749 transitions. [2020-07-21 14:46:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:56,673 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 14:46:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:57,240 INFO L225 Difference]: With dead ends: 776137 [2020-07-21 14:46:57,240 INFO L226 Difference]: Without dead ends: 524687 [2020-07-21 14:46:57,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:57,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524687 states. [2020-07-21 14:47:25,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524687 to 276633. [2020-07-21 14:47:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276633 states. [2020-07-21 14:47:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276633 states to 276633 states and 427519 transitions. [2020-07-21 14:47:25,499 INFO L78 Accepts]: Start accepts. Automaton has 276633 states and 427519 transitions. Word has length 491 [2020-07-21 14:47:25,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:25,500 INFO L479 AbstractCegarLoop]: Abstraction has 276633 states and 427519 transitions. [2020-07-21 14:47:25,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:25,500 INFO L276 IsEmpty]: Start isEmpty. Operand 276633 states and 427519 transitions. [2020-07-21 14:47:25,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 14:47:25,738 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:25,738 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] [2020-07-21 14:47:25,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:25,939 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:25,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:25,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1741657524, now seen corresponding path program 1 times [2020-07-21 14:47:25,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:25,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631022949] [2020-07-21 14:47:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:26,305 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:26,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:26,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:47:26,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:26,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:26,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631022949] [2020-07-21 14:47:26,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:26,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:26,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744693056] [2020-07-21 14:47:26,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:26,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:26,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:26,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:26,424 INFO L87 Difference]: Start difference. First operand 276633 states and 427519 transitions. Second operand 4 states. [2020-07-21 14:47:54,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:54,810 INFO L93 Difference]: Finished difference Result 616341 states and 958260 transitions. [2020-07-21 14:47:54,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:54,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-21 14:47:54,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:55,167 INFO L225 Difference]: With dead ends: 616341 [2020-07-21 14:47:55,167 INFO L226 Difference]: Without dead ends: 317758 [2020-07-21 14:47:55,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:55,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317758 states. [2020-07-21 14:48:25,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317758 to 317756. [2020-07-21 14:48:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317756 states. [2020-07-21 14:48:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317756 states to 317756 states and 493298 transitions. [2020-07-21 14:48:25,505 INFO L78 Accepts]: Start accepts. Automaton has 317756 states and 493298 transitions. Word has length 492 [2020-07-21 14:48:25,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:25,505 INFO L479 AbstractCegarLoop]: Abstraction has 317756 states and 493298 transitions. [2020-07-21 14:48:25,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:48:25,506 INFO L276 IsEmpty]: Start isEmpty. Operand 317756 states and 493298 transitions. [2020-07-21 14:48:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 14:48:25,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:25,796 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] [2020-07-21 14:48:26,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:26,005 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:26,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1992250301, now seen corresponding path program 1 times [2020-07-21 14:48:26,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:26,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025421820] [2020-07-21 14:48:26,007 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:26,348 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:26,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:26,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:48:26,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:26,448 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:26,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025421820] [2020-07-21 14:48:26,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:26,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:48:26,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133129229] [2020-07-21 14:48:26,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:48:26,449 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:26,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:48:26,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:48:26,449 INFO L87 Difference]: Start difference. First operand 317756 states and 493298 transitions. Second operand 3 states. [2020-07-21 14:49:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:49:14,509 INFO L93 Difference]: Finished difference Result 880770 states and 1360166 transitions. [2020-07-21 14:49:14,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:49:14,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 14:49:14,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:49:15,257 INFO L225 Difference]: With dead ends: 880770 [2020-07-21 14:49:15,257 INFO L226 Difference]: Without dead ends: 595294 [2020-07-21 14:49:16,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:16,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595294 states. [2020-07-21 14:49:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595294 to 323354. [2020-07-21 14:49:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323354 states. [2020-07-21 14:49:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323354 states to 323354 states and 500439 transitions. [2020-07-21 14:49:49,830 INFO L78 Accepts]: Start accepts. Automaton has 323354 states and 500439 transitions. Word has length 492 [2020-07-21 14:49:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:49,830 INFO L479 AbstractCegarLoop]: Abstraction has 323354 states and 500439 transitions. [2020-07-21 14:49:49,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:49:49,830 INFO L276 IsEmpty]: Start isEmpty. Operand 323354 states and 500439 transitions. [2020-07-21 14:49:50,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 14:49:50,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:50,099 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] [2020-07-21 14:49:50,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:50,300 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:50,301 INFO L82 PathProgramCache]: Analyzing trace with hash 911288384, now seen corresponding path program 1 times [2020-07-21 14:49:50,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:50,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982272861] [2020-07-21 14:49:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:50,640 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:49:50,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:50,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1590 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:49:50,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:49:50,744 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:50,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982272861] [2020-07-21 14:49:50,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:50,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:49:50,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19091595] [2020-07-21 14:49:50,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:49:50,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:50,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:49:50,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:50,746 INFO L87 Difference]: Start difference. First operand 323354 states and 500439 transitions. Second operand 3 states. [2020-07-21 14:50:42,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:50:42,768 INFO L93 Difference]: Finished difference Result 890032 states and 1371346 transitions. [2020-07-21 14:50:42,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:50:42,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2020-07-21 14:50:42,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:50:43,441 INFO L225 Difference]: With dead ends: 890032 [2020-07-21 14:50:43,441 INFO L226 Difference]: Without dead ends: 602804 [2020-07-21 14:50:43,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:44,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602804 states. [2020-07-21 14:51:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602804 to 331420. [2020-07-21 14:51:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331420 states. [2020-07-21 14:51:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331420 states to 331420 states and 510693 transitions. [2020-07-21 14:51:17,748 INFO L78 Accepts]: Start accepts. Automaton has 331420 states and 510693 transitions. Word has length 493 [2020-07-21 14:51:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:51:17,749 INFO L479 AbstractCegarLoop]: Abstraction has 331420 states and 510693 transitions. [2020-07-21 14:51:17,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:51:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 331420 states and 510693 transitions. [2020-07-21 14:51:18,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 14:51:18,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:51:18,068 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] [2020-07-21 14:51:18,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:51:18,275 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:51:18,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:51:18,276 INFO L82 PathProgramCache]: Analyzing trace with hash -247374860, now seen corresponding path program 1 times [2020-07-21 14:51:18,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:51:18,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054789638] [2020-07-21 14:51:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:51:18,786 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:51:18,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:51:18,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 2940 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:51:18,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:51:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:51:19,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:51:19,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054789638] [2020-07-21 14:51:19,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:51:19,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:51:19,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701995453] [2020-07-21 14:51:19,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:51:19,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:51:19,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:51:19,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:51:19,024 INFO L87 Difference]: Start difference. First operand 331420 states and 510693 transitions. Second operand 5 states. [2020-07-21 14:51:52,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:51:52,351 INFO L93 Difference]: Finished difference Result 508878 states and 776278 transitions. [2020-07-21 14:51:52,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:51:52,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 494 [2020-07-21 14:51:52,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:51:52,683 INFO L225 Difference]: With dead ends: 508878 [2020-07-21 14:51:52,683 INFO L226 Difference]: Without dead ends: 331420 [2020-07-21 14:51:52,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:51:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331420 states. [2020-07-21 14:52:20,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331420 to 331420. [2020-07-21 14:52:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331420 states. [2020-07-21 14:52:20,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331420 states to 331420 states and 507029 transitions. [2020-07-21 14:52:20,549 INFO L78 Accepts]: Start accepts. Automaton has 331420 states and 507029 transitions. Word has length 494 [2020-07-21 14:52:20,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:52:20,549 INFO L479 AbstractCegarLoop]: Abstraction has 331420 states and 507029 transitions. [2020-07-21 14:52:20,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:52:20,550 INFO L276 IsEmpty]: Start isEmpty. Operand 331420 states and 507029 transitions. [2020-07-21 14:52:20,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 14:52:20,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:52:20,866 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] [2020-07-21 14:52:21,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:52:21,067 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:52:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:52:21,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1984525629, now seen corresponding path program 1 times [2020-07-21 14:52:21,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:52:21,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617908000] [2020-07-21 14:52:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:52:21,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:52:21,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:52:21,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 2943 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:52:21,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:52:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:52:22,326 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:52:22,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617908000] [2020-07-21 14:52:22,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:52:22,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:52:22,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554660483] [2020-07-21 14:52:22,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:52:22,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:52:22,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:52:22,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:52:22,328 INFO L87 Difference]: Start difference. First operand 331420 states and 507029 transitions. Second operand 3 states. [2020-07-21 14:53:18,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:53:18,633 INFO L93 Difference]: Finished difference Result 948414 states and 1448956 transitions. [2020-07-21 14:53:18,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:53:18,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 494 [2020-07-21 14:53:18,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:53:19,386 INFO L225 Difference]: With dead ends: 948414 [2020-07-21 14:53:19,386 INFO L226 Difference]: Without dead ends: 646184 [2020-07-21 14:53:19,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:53:20,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646184 states. [2020-07-21 14:54:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646184 to 646182. [2020-07-21 14:54:30,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 646182 states. [2020-07-21 14:54:31,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646182 states to 646182 states and 984431 transitions. [2020-07-21 14:54:31,187 INFO L78 Accepts]: Start accepts. Automaton has 646182 states and 984431 transitions. Word has length 494 [2020-07-21 14:54:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:54:31,187 INFO L479 AbstractCegarLoop]: Abstraction has 646182 states and 984431 transitions. [2020-07-21 14:54:31,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:54:31,187 INFO L276 IsEmpty]: Start isEmpty. Operand 646182 states and 984431 transitions. [2020-07-21 14:54:31,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 14:54:31,886 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:54:31,887 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] [2020-07-21 14:54:32,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:32,088 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:54:32,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:54:32,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1709273431, now seen corresponding path program 1 times [2020-07-21 14:54:32,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:54:32,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049549754] [2020-07-21 14:54:32,089 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:54:32,432 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:54:32,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:54:32,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:54:32,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:54:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:54:33,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:54:33,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049549754] [2020-07-21 14:54:33,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:54:33,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:54:33,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301115433] [2020-07-21 14:54:33,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:54:33,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:54:33,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:54:33,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:54:33,638 INFO L87 Difference]: Start difference. First operand 646182 states and 984431 transitions. Second operand 4 states.