/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:33:21,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:33:21,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:33:21,586 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:33:21,587 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:33:21,588 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:33:21,589 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:33:21,591 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:33:21,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:33:21,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:33:21,594 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:33:21,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:33:21,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:33:21,596 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:33:21,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:33:21,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:33:21,599 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:33:21,600 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:33:21,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:33:21,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:33:21,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:33:21,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:33:21,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:33:21,608 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:33:21,610 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 18:33:21,613 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 18:33:21,614 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 18:33:21,615 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 18:33:21,616 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 18:33:21,617 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 18:33:21,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 18:33:21,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 18:33:21,618 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 18:33:21,618 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:33:21,619 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:33:21,619 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:33:21,620 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 18:33:21,635 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:33:21,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:33:21,636 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:33:21,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:33:21,637 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:33:21,637 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:33:21,637 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:33:21,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:33:21,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:33:21,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:33:21,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:33:21,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:33:21,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:33:21,638 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:33:21,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:33:21,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:33:21,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:33:21,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:33:21,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:33:21,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:33:21,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:33:21,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:33:21,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:33:21,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:33:21,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:33:21,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:33:21,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:21,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:33:21,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:33:21,641 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 18:33:21,911 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:33:21,924 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:33:21,928 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:33:21,929 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:33:21,930 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:33:21,930 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 18:33:22,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efd2b9a21/c92bdffb785e4f3d81036157170a1e16/FLAG2c77445ca [2020-07-20 18:33:22,653 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:33:22,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 18:33:22,679 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efd2b9a21/c92bdffb785e4f3d81036157170a1e16/FLAG2c77445ca [2020-07-20 18:33:22,835 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/efd2b9a21/c92bdffb785e4f3d81036157170a1e16 [2020-07-20 18:33:22,844 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:33:22,848 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:33:22,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:33:22,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:33:22,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:33:22,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:33:22" (1/1) ... [2020-07-20 18:33:22,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cf4f017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:22, skipping insertion in model container [2020-07-20 18:33:22,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:33:22" (1/1) ... [2020-07-20 18:33:22,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:33:22,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:33:23,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:33:23,998 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:33:24,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:33:24,496 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:33:24,496 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:24 WrapperNode [2020-07-20 18:33:24,497 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:33:24,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:33:24,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:33:24,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:33:24,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:24" (1/1) ... [2020-07-20 18:33:24,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:24" (1/1) ... [2020-07-20 18:33:24,541 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:24" (1/1) ... [2020-07-20 18:33:24,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:24" (1/1) ... [2020-07-20 18:33:24,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:24" (1/1) ... [2020-07-20 18:33:24,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:24" (1/1) ... [2020-07-20 18:33:24,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:24" (1/1) ... [2020-07-20 18:33:24,721 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:33:24,721 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:33:24,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:33:24,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:33:24,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:33:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:33:24,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:33:24,808 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:33:24,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:33:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:33:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 18:33:24,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 18:33:24,810 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 18:33:24,810 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:33:24,810 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:33:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 18:33:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 18:33:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 18:33:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 18:33:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 18:33:24,812 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 18:33:24,812 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 18:33:24,813 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 18:33:24,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:33:24,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:33:24,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:33:27,241 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:33:27,241 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 18:33:27,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:33:27 BoogieIcfgContainer [2020-07-20 18:33:27,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:33:27,252 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:33:27,252 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:33:27,255 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:33:27,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:33:22" (1/3) ... [2020-07-20 18:33:27,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105bfa38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:33:27, skipping insertion in model container [2020-07-20 18:33:27,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:33:24" (2/3) ... [2020-07-20 18:33:27,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105bfa38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:33:27, skipping insertion in model container [2020-07-20 18:33:27,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:33:27" (3/3) ... [2020-07-20 18:33:27,259 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-07-20 18:33:27,269 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:33:27,277 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 18:33:27,291 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 18:33:27,317 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:33:27,317 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:33:27,318 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:33:27,318 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:33:27,318 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:33:27,318 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:33:27,318 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:33:27,318 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:33:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-07-20 18:33:27,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-07-20 18:33:27,390 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:27,391 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] [2020-07-20 18:33:27,392 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:27,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:27,398 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-07-20 18:33:27,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:27,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259194844] [2020-07-20 18:33:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:28,060 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:33:28,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:28,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 1959 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:33:28,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:28,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:28,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259194844] [2020-07-20 18:33:28,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:28,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:33:28,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304686386] [2020-07-20 18:33:28,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:33:28,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:28,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:33:28,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:33:28,414 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2020-07-20 18:33:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:28,700 INFO L93 Difference]: Finished difference Result 2291 states and 4069 transitions. [2020-07-20 18:33:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:33:28,702 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-07-20 18:33:28,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:28,726 INFO L225 Difference]: With dead ends: 2291 [2020-07-20 18:33:28,727 INFO L226 Difference]: Without dead ends: 1541 [2020-07-20 18:33:28,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:33:28,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2020-07-20 18:33:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1539. [2020-07-20 18:33:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1539 states. [2020-07-20 18:33:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 2393 transitions. [2020-07-20 18:33:28,863 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 2393 transitions. Word has length 324 [2020-07-20 18:33:28,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:28,864 INFO L479 AbstractCegarLoop]: Abstraction has 1539 states and 2393 transitions. [2020-07-20 18:33:28,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:33:28,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 2393 transitions. [2020-07-20 18:33:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 18:33:28,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:28,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:33:29,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:29,090 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:29,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:29,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1433426969, now seen corresponding path program 1 times [2020-07-20 18:33:29,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:29,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206415911] [2020-07-20 18:33:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:29,588 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:33:29,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:29,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1963 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:33:29,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:29,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:29,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206415911] [2020-07-20 18:33:29,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:29,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:33:29,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781348492] [2020-07-20 18:33:29,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:33:29,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:29,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:33:29,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:29,775 INFO L87 Difference]: Start difference. First operand 1539 states and 2393 transitions. Second operand 3 states. [2020-07-20 18:33:30,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:30,003 INFO L93 Difference]: Finished difference Result 4345 states and 6703 transitions. [2020-07-20 18:33:30,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:33:30,004 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 18:33:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:30,021 INFO L225 Difference]: With dead ends: 4345 [2020-07-20 18:33:30,022 INFO L226 Difference]: Without dead ends: 2935 [2020-07-20 18:33:30,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:30,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2935 states. [2020-07-20 18:33:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2935 to 2933. [2020-07-20 18:33:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2933 states. [2020-07-20 18:33:30,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2933 states to 2933 states and 4515 transitions. [2020-07-20 18:33:30,150 INFO L78 Accepts]: Start accepts. Automaton has 2933 states and 4515 transitions. Word has length 326 [2020-07-20 18:33:30,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:30,153 INFO L479 AbstractCegarLoop]: Abstraction has 2933 states and 4515 transitions. [2020-07-20 18:33:30,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:33:30,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2933 states and 4515 transitions. [2020-07-20 18:33:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-07-20 18:33:30,166 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:30,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:33:30,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:30,383 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:30,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:30,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2025202658, now seen corresponding path program 1 times [2020-07-20 18:33:30,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:30,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544730309] [2020-07-20 18:33:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:30,705 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:33:30,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:30,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:33:30,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:30,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:30,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544730309] [2020-07-20 18:33:30,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:30,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:33:30,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295099089] [2020-07-20 18:33:30,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:33:30,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:30,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:33:30,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:30,838 INFO L87 Difference]: Start difference. First operand 2933 states and 4515 transitions. Second operand 3 states. [2020-07-20 18:33:31,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:31,015 INFO L93 Difference]: Finished difference Result 8477 states and 12976 transitions. [2020-07-20 18:33:31,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:33:31,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 326 [2020-07-20 18:33:31,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:31,043 INFO L225 Difference]: With dead ends: 8477 [2020-07-20 18:33:31,043 INFO L226 Difference]: Without dead ends: 5709 [2020-07-20 18:33:31,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5709 states. [2020-07-20 18:33:31,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5709 to 2955. [2020-07-20 18:33:31,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2955 states. [2020-07-20 18:33:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4542 transitions. [2020-07-20 18:33:31,195 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4542 transitions. Word has length 326 [2020-07-20 18:33:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:31,195 INFO L479 AbstractCegarLoop]: Abstraction has 2955 states and 4542 transitions. [2020-07-20 18:33:31,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:33:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4542 transitions. [2020-07-20 18:33:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 18:33:31,204 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:31,205 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] [2020-07-20 18:33:31,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:31,419 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash 833893240, now seen corresponding path program 1 times [2020-07-20 18:33:31,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:31,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433120918] [2020-07-20 18:33:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:31,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:33:31,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:31,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:33:31,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:31,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:31,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433120918] [2020-07-20 18:33:31,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:31,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:33:31,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141135035] [2020-07-20 18:33:31,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:33:31,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:31,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:33:31,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:31,983 INFO L87 Difference]: Start difference. First operand 2955 states and 4542 transitions. Second operand 3 states. [2020-07-20 18:33:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:32,198 INFO L93 Difference]: Finished difference Result 8520 states and 13033 transitions. [2020-07-20 18:33:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:33:32,199 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 327 [2020-07-20 18:33:32,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:32,225 INFO L225 Difference]: With dead ends: 8520 [2020-07-20 18:33:32,225 INFO L226 Difference]: Without dead ends: 5744 [2020-07-20 18:33:32,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:32,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5744 states. [2020-07-20 18:33:32,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5744 to 2984. [2020-07-20 18:33:32,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2984 states. [2020-07-20 18:33:32,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 4579 transitions. [2020-07-20 18:33:32,401 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 4579 transitions. Word has length 327 [2020-07-20 18:33:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:32,402 INFO L479 AbstractCegarLoop]: Abstraction has 2984 states and 4579 transitions. [2020-07-20 18:33:32,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:33:32,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 4579 transitions. [2020-07-20 18:33:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 18:33:32,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:32,415 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] [2020-07-20 18:33:32,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:32,630 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:32,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:32,631 INFO L82 PathProgramCache]: Analyzing trace with hash 137960468, now seen corresponding path program 1 times [2020-07-20 18:33:32,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:32,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96178922] [2020-07-20 18:33:32,633 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:33,123 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:33:33,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:33:33,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:33,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:33,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96178922] [2020-07-20 18:33:33,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:33,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:33:33,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264180032] [2020-07-20 18:33:33,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:33:33,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:33,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:33:33,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:33,236 INFO L87 Difference]: Start difference. First operand 2984 states and 4579 transitions. Second operand 3 states. [2020-07-20 18:33:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:33,501 INFO L93 Difference]: Finished difference Result 8577 states and 13116 transitions. [2020-07-20 18:33:33,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:33:33,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 328 [2020-07-20 18:33:33,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:33,530 INFO L225 Difference]: With dead ends: 8577 [2020-07-20 18:33:33,531 INFO L226 Difference]: Without dead ends: 5808 [2020-07-20 18:33:33,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:33,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2020-07-20 18:33:33,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5806. [2020-07-20 18:33:33,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5806 states. [2020-07-20 18:33:33,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5806 states to 5806 states and 8845 transitions. [2020-07-20 18:33:33,819 INFO L78 Accepts]: Start accepts. Automaton has 5806 states and 8845 transitions. Word has length 328 [2020-07-20 18:33:33,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:33,819 INFO L479 AbstractCegarLoop]: Abstraction has 5806 states and 8845 transitions. [2020-07-20 18:33:33,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:33:33,820 INFO L276 IsEmpty]: Start isEmpty. Operand 5806 states and 8845 transitions. [2020-07-20 18:33:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-07-20 18:33:33,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:33,834 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] [2020-07-20 18:33:34,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:34,049 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:34,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:34,049 INFO L82 PathProgramCache]: Analyzing trace with hash -498918543, now seen corresponding path program 1 times [2020-07-20 18:33:34,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:34,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153408004] [2020-07-20 18:33:34,050 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:34,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:33:34,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:34,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 968 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:33:34,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:34,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:34,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:34,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153408004] [2020-07-20 18:33:34,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:34,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:33:34,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844399029] [2020-07-20 18:33:34,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:33:34,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:34,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:33:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:33:34,463 INFO L87 Difference]: Start difference. First operand 5806 states and 8845 transitions. Second operand 4 states. [2020-07-20 18:33:34,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:34,827 INFO L93 Difference]: Finished difference Result 12235 states and 18590 transitions. [2020-07-20 18:33:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:33:34,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-07-20 18:33:34,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:34,867 INFO L225 Difference]: With dead ends: 12235 [2020-07-20 18:33:34,868 INFO L226 Difference]: Without dead ends: 6550 [2020-07-20 18:33:34,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 325 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:33:34,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6550 states. [2020-07-20 18:33:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6550 to 5802. [2020-07-20 18:33:35,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5802 states. [2020-07-20 18:33:35,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5802 states to 5802 states and 8828 transitions. [2020-07-20 18:33:35,086 INFO L78 Accepts]: Start accepts. Automaton has 5802 states and 8828 transitions. Word has length 328 [2020-07-20 18:33:35,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:35,086 INFO L479 AbstractCegarLoop]: Abstraction has 5802 states and 8828 transitions. [2020-07-20 18:33:35,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:33:35,087 INFO L276 IsEmpty]: Start isEmpty. Operand 5802 states and 8828 transitions. [2020-07-20 18:33:35,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 18:33:35,099 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:35,099 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] [2020-07-20 18:33:35,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:35,315 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:35,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:35,315 INFO L82 PathProgramCache]: Analyzing trace with hash -382737804, now seen corresponding path program 1 times [2020-07-20 18:33:35,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:35,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848630350] [2020-07-20 18:33:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:35,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:33:35,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:35,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 972 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:33:35,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:35,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:35,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848630350] [2020-07-20 18:33:35,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:35,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:33:35,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614103124] [2020-07-20 18:33:35,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:33:35,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:35,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:33:35,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:35,700 INFO L87 Difference]: Start difference. First operand 5802 states and 8828 transitions. Second operand 3 states. [2020-07-20 18:33:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:36,131 INFO L93 Difference]: Finished difference Result 17020 states and 25827 transitions. [2020-07-20 18:33:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:33:36,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-20 18:33:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:36,156 INFO L225 Difference]: With dead ends: 17020 [2020-07-20 18:33:36,157 INFO L226 Difference]: Without dead ends: 11417 [2020-07-20 18:33:36,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11417 states. [2020-07-20 18:33:36,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11417 to 5828. [2020-07-20 18:33:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5828 states. [2020-07-20 18:33:36,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5828 states to 5828 states and 8860 transitions. [2020-07-20 18:33:36,404 INFO L78 Accepts]: Start accepts. Automaton has 5828 states and 8860 transitions. Word has length 330 [2020-07-20 18:33:36,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:36,404 INFO L479 AbstractCegarLoop]: Abstraction has 5828 states and 8860 transitions. [2020-07-20 18:33:36,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:33:36,404 INFO L276 IsEmpty]: Start isEmpty. Operand 5828 states and 8860 transitions. [2020-07-20 18:33:36,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-07-20 18:33:36,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:36,416 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] [2020-07-20 18:33:36,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:36,631 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:36,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1368283841, now seen corresponding path program 1 times [2020-07-20 18:33:36,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:36,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713299634] [2020-07-20 18:33:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:36,961 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:33:36,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:36,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:33:36,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:37,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:37,039 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:37,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713299634] [2020-07-20 18:33:37,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:37,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:33:37,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276088259] [2020-07-20 18:33:37,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:33:37,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:37,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:33:37,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:33:37,042 INFO L87 Difference]: Start difference. First operand 5828 states and 8860 transitions. Second operand 4 states. [2020-07-20 18:33:37,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:37,474 INFO L93 Difference]: Finished difference Result 15781 states and 23840 transitions. [2020-07-20 18:33:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:33:37,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 331 [2020-07-20 18:33:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:37,502 INFO L225 Difference]: With dead ends: 15781 [2020-07-20 18:33:37,503 INFO L226 Difference]: Without dead ends: 10683 [2020-07-20 18:33:37,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:33:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10683 states. [2020-07-20 18:33:37,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10683 to 6291. [2020-07-20 18:33:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6291 states. [2020-07-20 18:33:37,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6291 states to 6291 states and 9631 transitions. [2020-07-20 18:33:37,809 INFO L78 Accepts]: Start accepts. Automaton has 6291 states and 9631 transitions. Word has length 331 [2020-07-20 18:33:37,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:37,810 INFO L479 AbstractCegarLoop]: Abstraction has 6291 states and 9631 transitions. [2020-07-20 18:33:37,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:33:37,810 INFO L276 IsEmpty]: Start isEmpty. Operand 6291 states and 9631 transitions. [2020-07-20 18:33:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 18:33:37,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:37,826 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] [2020-07-20 18:33:38,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:38,042 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:38,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1642260365, now seen corresponding path program 1 times [2020-07-20 18:33:38,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:38,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970368041] [2020-07-20 18:33:38,044 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:38,373 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:33:38,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:38,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:33:38,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:38,624 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:38,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970368041] [2020-07-20 18:33:38,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:38,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:33:38,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524168846] [2020-07-20 18:33:38,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:33:38,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:33:38,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:33:38,629 INFO L87 Difference]: Start difference. First operand 6291 states and 9631 transitions. Second operand 4 states. [2020-07-20 18:33:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:39,289 INFO L93 Difference]: Finished difference Result 10997 states and 17035 transitions. [2020-07-20 18:33:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:33:39,290 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-07-20 18:33:39,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:39,314 INFO L225 Difference]: With dead ends: 10997 [2020-07-20 18:33:39,314 INFO L226 Difference]: Without dead ends: 9655 [2020-07-20 18:33:39,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:33:39,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9655 states. [2020-07-20 18:33:39,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9655 to 9653. [2020-07-20 18:33:39,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9653 states. [2020-07-20 18:33:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9653 states to 9653 states and 14794 transitions. [2020-07-20 18:33:39,752 INFO L78 Accepts]: Start accepts. Automaton has 9653 states and 14794 transitions. Word has length 333 [2020-07-20 18:33:39,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:39,752 INFO L479 AbstractCegarLoop]: Abstraction has 9653 states and 14794 transitions. [2020-07-20 18:33:39,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:33:39,753 INFO L276 IsEmpty]: Start isEmpty. Operand 9653 states and 14794 transitions. [2020-07-20 18:33:39,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 18:33:39,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:39,769 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] [2020-07-20 18:33:39,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:39,983 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:39,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:39,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1838346794, now seen corresponding path program 1 times [2020-07-20 18:33:39,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:39,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1826729257] [2020-07-20 18:33:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:40,471 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:33:40,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:40,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 1984 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 18:33:40,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:40,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:40,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:40,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1826729257] [2020-07-20 18:33:40,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:40,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 18:33:40,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183008914] [2020-07-20 18:33:40,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 18:33:40,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:40,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 18:33:40,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 18:33:40,670 INFO L87 Difference]: Start difference. First operand 9653 states and 14794 transitions. Second operand 8 states. [2020-07-20 18:33:42,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:42,622 INFO L93 Difference]: Finished difference Result 24342 states and 37356 transitions. [2020-07-20 18:33:42,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 18:33:42,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 333 [2020-07-20 18:33:42,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:42,653 INFO L225 Difference]: With dead ends: 24342 [2020-07-20 18:33:42,653 INFO L226 Difference]: Without dead ends: 16734 [2020-07-20 18:33:42,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 18:33:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16734 states. [2020-07-20 18:33:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16734 to 10862. [2020-07-20 18:33:43,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10862 states. [2020-07-20 18:33:43,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10862 states to 10862 states and 16419 transitions. [2020-07-20 18:33:43,458 INFO L78 Accepts]: Start accepts. Automaton has 10862 states and 16419 transitions. Word has length 333 [2020-07-20 18:33:43,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:43,458 INFO L479 AbstractCegarLoop]: Abstraction has 10862 states and 16419 transitions. [2020-07-20 18:33:43,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 18:33:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 10862 states and 16419 transitions. [2020-07-20 18:33:43,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-20 18:33:43,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:43,475 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] [2020-07-20 18:33:43,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:43,689 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:43,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:43,690 INFO L82 PathProgramCache]: Analyzing trace with hash -161595438, now seen corresponding path program 1 times [2020-07-20 18:33:43,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:43,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631589369] [2020-07-20 18:33:43,691 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:44,121 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:33:44,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 1981 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:33:44,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:44,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:44,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:44,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631589369] [2020-07-20 18:33:44,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:44,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:33:44,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521403701] [2020-07-20 18:33:44,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:33:44,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:44,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:33:44,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:44,178 INFO L87 Difference]: Start difference. First operand 10862 states and 16419 transitions. Second operand 3 states. [2020-07-20 18:33:45,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:45,017 INFO L93 Difference]: Finished difference Result 32053 states and 48361 transitions. [2020-07-20 18:33:45,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:33:45,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-20 18:33:45,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:45,046 INFO L225 Difference]: With dead ends: 32053 [2020-07-20 18:33:45,046 INFO L226 Difference]: Without dead ends: 21361 [2020-07-20 18:33:45,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:33:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21361 states. [2020-07-20 18:33:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21361 to 10893. [2020-07-20 18:33:45,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10893 states. [2020-07-20 18:33:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10893 states to 10893 states and 16457 transitions. [2020-07-20 18:33:45,643 INFO L78 Accepts]: Start accepts. Automaton has 10893 states and 16457 transitions. Word has length 333 [2020-07-20 18:33:45,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:45,643 INFO L479 AbstractCegarLoop]: Abstraction has 10893 states and 16457 transitions. [2020-07-20 18:33:45,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:33:45,643 INFO L276 IsEmpty]: Start isEmpty. Operand 10893 states and 16457 transitions. [2020-07-20 18:33:45,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 18:33:45,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:45,656 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] [2020-07-20 18:33:45,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:45,857 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:45,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:45,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1155626763, now seen corresponding path program 1 times [2020-07-20 18:33:45,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:45,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424042229] [2020-07-20 18:33:45,859 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:46,142 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:33:46,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:46,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 18:33:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:46,452 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:46,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424042229] [2020-07-20 18:33:46,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:46,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 18:33:46,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558171801] [2020-07-20 18:33:46,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 18:33:46,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:46,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 18:33:46,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 18:33:46,455 INFO L87 Difference]: Start difference. First operand 10893 states and 16457 transitions. Second operand 9 states. [2020-07-20 18:33:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:53,801 INFO L93 Difference]: Finished difference Result 48927 states and 75733 transitions. [2020-07-20 18:33:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 18:33:53,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 334 [2020-07-20 18:33:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:53,845 INFO L225 Difference]: With dead ends: 48927 [2020-07-20 18:33:53,846 INFO L226 Difference]: Without dead ends: 47424 [2020-07-20 18:33:53,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 18:33:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47424 states. [2020-07-20 18:33:55,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47424 to 22191. [2020-07-20 18:33:55,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22191 states. [2020-07-20 18:33:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22191 states to 22191 states and 33701 transitions. [2020-07-20 18:33:55,071 INFO L78 Accepts]: Start accepts. Automaton has 22191 states and 33701 transitions. Word has length 334 [2020-07-20 18:33:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:55,071 INFO L479 AbstractCegarLoop]: Abstraction has 22191 states and 33701 transitions. [2020-07-20 18:33:55,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 18:33:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 22191 states and 33701 transitions. [2020-07-20 18:33:55,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 18:33:55,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:55,090 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] [2020-07-20 18:33:55,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:55,291 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:55,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:55,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1418429232, now seen corresponding path program 1 times [2020-07-20 18:33:55,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:55,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751850652] [2020-07-20 18:33:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:55,730 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:33:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:55,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1984 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 18:33:55,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:55,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:55,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751850652] [2020-07-20 18:33:55,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:55,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 18:33:55,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004153781] [2020-07-20 18:33:55,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 18:33:55,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:55,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 18:33:55,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 18:33:55,988 INFO L87 Difference]: Start difference. First operand 22191 states and 33701 transitions. Second operand 8 states. [2020-07-20 18:33:59,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:33:59,504 INFO L93 Difference]: Finished difference Result 37986 states and 58493 transitions. [2020-07-20 18:33:59,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 18:33:59,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 334 [2020-07-20 18:33:59,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:33:59,536 INFO L225 Difference]: With dead ends: 37986 [2020-07-20 18:33:59,536 INFO L226 Difference]: Without dead ends: 33882 [2020-07-20 18:33:59,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 18:33:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33882 states. [2020-07-20 18:34:00,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33882 to 14931. [2020-07-20 18:34:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14931 states. [2020-07-20 18:34:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14931 states to 14931 states and 22575 transitions. [2020-07-20 18:34:00,399 INFO L78 Accepts]: Start accepts. Automaton has 14931 states and 22575 transitions. Word has length 334 [2020-07-20 18:34:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:34:00,399 INFO L479 AbstractCegarLoop]: Abstraction has 14931 states and 22575 transitions. [2020-07-20 18:34:00,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 18:34:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 14931 states and 22575 transitions. [2020-07-20 18:34:00,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 18:34:00,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:34:00,409 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] [2020-07-20 18:34:00,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:00,618 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:34:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:34:00,619 INFO L82 PathProgramCache]: Analyzing trace with hash 320862614, now seen corresponding path program 1 times [2020-07-20 18:34:00,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:34:00,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629374545] [2020-07-20 18:34:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:01,047 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:34:01,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:34:01,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1981 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:34:01,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:34:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:34:01,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:34:01,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629374545] [2020-07-20 18:34:01,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:34:01,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:34:01,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957454814] [2020-07-20 18:34:01,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:34:01,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:34:01,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:34:01,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:34:01,254 INFO L87 Difference]: Start difference. First operand 14931 states and 22575 transitions. Second operand 3 states. [2020-07-20 18:34:02,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:34:02,321 INFO L93 Difference]: Finished difference Result 32596 states and 49389 transitions. [2020-07-20 18:34:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:34:02,322 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 18:34:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:34:02,342 INFO L225 Difference]: With dead ends: 32596 [2020-07-20 18:34:02,342 INFO L226 Difference]: Without dead ends: 19637 [2020-07-20 18:34:02,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:34:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19637 states. [2020-07-20 18:34:03,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19637 to 16609. [2020-07-20 18:34:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16609 states. [2020-07-20 18:34:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16609 states to 16609 states and 25271 transitions. [2020-07-20 18:34:03,984 INFO L78 Accepts]: Start accepts. Automaton has 16609 states and 25271 transitions. Word has length 334 [2020-07-20 18:34:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:34:03,985 INFO L479 AbstractCegarLoop]: Abstraction has 16609 states and 25271 transitions. [2020-07-20 18:34:03,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:34:03,985 INFO L276 IsEmpty]: Start isEmpty. Operand 16609 states and 25271 transitions. [2020-07-20 18:34:03,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 18:34:03,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:34:03,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:34:04,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:04,195 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:34:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:34:04,196 INFO L82 PathProgramCache]: Analyzing trace with hash -319301350, now seen corresponding path program 1 times [2020-07-20 18:34:04,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:34:04,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778377265] [2020-07-20 18:34:04,197 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:04,639 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:34:04,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:34:04,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1981 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:34:04,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:34:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:34:04,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:34:04,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778377265] [2020-07-20 18:34:04,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:34:04,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:34:04,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531137786] [2020-07-20 18:34:04,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:34:04,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:34:04,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:34:04,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:34:04,706 INFO L87 Difference]: Start difference. First operand 16609 states and 25271 transitions. Second operand 3 states. [2020-07-20 18:34:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:34:06,185 INFO L93 Difference]: Finished difference Result 37528 states and 57444 transitions. [2020-07-20 18:34:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:34:06,186 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 18:34:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:34:06,206 INFO L225 Difference]: With dead ends: 37528 [2020-07-20 18:34:06,206 INFO L226 Difference]: Without dead ends: 23327 [2020-07-20 18:34:06,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:34:06,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23327 states. [2020-07-20 18:34:07,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23327 to 21075. [2020-07-20 18:34:07,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21075 states. [2020-07-20 18:34:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21075 states to 21075 states and 32387 transitions. [2020-07-20 18:34:07,467 INFO L78 Accepts]: Start accepts. Automaton has 21075 states and 32387 transitions. Word has length 334 [2020-07-20 18:34:07,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:34:07,468 INFO L479 AbstractCegarLoop]: Abstraction has 21075 states and 32387 transitions. [2020-07-20 18:34:07,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:34:07,468 INFO L276 IsEmpty]: Start isEmpty. Operand 21075 states and 32387 transitions. [2020-07-20 18:34:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 18:34:07,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:34:07,480 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] [2020-07-20 18:34:07,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:07,681 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:34:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:34:07,683 INFO L82 PathProgramCache]: Analyzing trace with hash -588727258, now seen corresponding path program 1 times [2020-07-20 18:34:07,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:34:07,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247625868] [2020-07-20 18:34:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:08,036 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:34:08,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:34:08,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:34:08,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:34:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:34:08,266 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:34:08,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247625868] [2020-07-20 18:34:08,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:34:08,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:34:08,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589910487] [2020-07-20 18:34:08,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:34:08,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:34:08,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:34:08,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:34:08,271 INFO L87 Difference]: Start difference. First operand 21075 states and 32387 transitions. Second operand 3 states. [2020-07-20 18:34:10,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:34:10,764 INFO L93 Difference]: Finished difference Result 60739 states and 93000 transitions. [2020-07-20 18:34:10,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:34:10,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 18:34:10,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:34:10,801 INFO L225 Difference]: With dead ends: 60739 [2020-07-20 18:34:10,801 INFO L226 Difference]: Without dead ends: 40911 [2020-07-20 18:34:10,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:34:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40911 states. [2020-07-20 18:34:12,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40911 to 21180. [2020-07-20 18:34:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21180 states. [2020-07-20 18:34:12,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21180 states to 21180 states and 32521 transitions. [2020-07-20 18:34:12,208 INFO L78 Accepts]: Start accepts. Automaton has 21180 states and 32521 transitions. Word has length 334 [2020-07-20 18:34:12,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:34:12,209 INFO L479 AbstractCegarLoop]: Abstraction has 21180 states and 32521 transitions. [2020-07-20 18:34:12,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:34:12,209 INFO L276 IsEmpty]: Start isEmpty. Operand 21180 states and 32521 transitions. [2020-07-20 18:34:12,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 18:34:12,221 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:34:12,222 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] [2020-07-20 18:34:12,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:12,438 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:34:12,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:34:12,439 INFO L82 PathProgramCache]: Analyzing trace with hash -768123922, now seen corresponding path program 1 times [2020-07-20 18:34:12,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:34:12,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527822817] [2020-07-20 18:34:12,440 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:12,784 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:34:12,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:34:12,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 18:34:12,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:34:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:34:12,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:34:12,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527822817] [2020-07-20 18:34:12,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:34:12,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 18:34:12,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295321780] [2020-07-20 18:34:12,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 18:34:12,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:34:12,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 18:34:12,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 18:34:12,971 INFO L87 Difference]: Start difference. First operand 21180 states and 32521 transitions. Second operand 9 states. [2020-07-20 18:34:24,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:34:24,889 INFO L93 Difference]: Finished difference Result 105349 states and 164760 transitions. [2020-07-20 18:34:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 18:34:24,889 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 334 [2020-07-20 18:34:24,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:34:24,989 INFO L225 Difference]: With dead ends: 105349 [2020-07-20 18:34:24,989 INFO L226 Difference]: Without dead ends: 101470 [2020-07-20 18:34:25,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2020-07-20 18:34:25,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101470 states. [2020-07-20 18:34:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101470 to 42092. [2020-07-20 18:34:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42092 states. [2020-07-20 18:34:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42092 states to 42092 states and 64973 transitions. [2020-07-20 18:34:28,458 INFO L78 Accepts]: Start accepts. Automaton has 42092 states and 64973 transitions. Word has length 334 [2020-07-20 18:34:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:34:28,459 INFO L479 AbstractCegarLoop]: Abstraction has 42092 states and 64973 transitions. [2020-07-20 18:34:28,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 18:34:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 42092 states and 64973 transitions. [2020-07-20 18:34:28,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 18:34:28,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:34:28,479 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] [2020-07-20 18:34:28,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:28,692 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:34:28,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:34:28,693 INFO L82 PathProgramCache]: Analyzing trace with hash 551259435, now seen corresponding path program 1 times [2020-07-20 18:34:28,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:34:28,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297983648] [2020-07-20 18:34:28,694 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:29,128 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:34:29,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:34:29,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 1981 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:34:29,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:34:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:34:29,185 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:34:29,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297983648] [2020-07-20 18:34:29,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:34:29,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:34:29,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978351328] [2020-07-20 18:34:29,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:34:29,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:34:29,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:34:29,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:34:29,187 INFO L87 Difference]: Start difference. First operand 42092 states and 64973 transitions. Second operand 3 states. [2020-07-20 18:34:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:34:35,312 INFO L93 Difference]: Finished difference Result 105758 states and 164125 transitions. [2020-07-20 18:34:35,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:34:35,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 334 [2020-07-20 18:34:35,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:34:35,377 INFO L225 Difference]: With dead ends: 105758 [2020-07-20 18:34:35,378 INFO L226 Difference]: Without dead ends: 66031 [2020-07-20 18:34:35,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:34:35,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66031 states. [2020-07-20 18:34:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66031 to 59420. [2020-07-20 18:34:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59420 states. [2020-07-20 18:34:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59420 states to 59420 states and 92527 transitions. [2020-07-20 18:34:40,070 INFO L78 Accepts]: Start accepts. Automaton has 59420 states and 92527 transitions. Word has length 334 [2020-07-20 18:34:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:34:40,070 INFO L479 AbstractCegarLoop]: Abstraction has 59420 states and 92527 transitions. [2020-07-20 18:34:40,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:34:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 59420 states and 92527 transitions. [2020-07-20 18:34:40,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-07-20 18:34:40,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:34:40,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:34:40,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:40,290 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:34:40,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:34:40,291 INFO L82 PathProgramCache]: Analyzing trace with hash 824269883, now seen corresponding path program 1 times [2020-07-20 18:34:40,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:34:40,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362897568] [2020-07-20 18:34:40,291 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:40,615 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:34:40,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:34:40,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:34:40,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:34:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:34:40,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:34:40,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362897568] [2020-07-20 18:34:40,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:34:40,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:34:40,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823753250] [2020-07-20 18:34:40,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:34:40,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:34:40,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:34:40,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:34:40,684 INFO L87 Difference]: Start difference. First operand 59420 states and 92527 transitions. Second operand 4 states. [2020-07-20 18:34:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:34:50,991 INFO L93 Difference]: Finished difference Result 173509 states and 269965 transitions. [2020-07-20 18:34:50,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:34:50,992 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 335 [2020-07-20 18:34:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:34:51,130 INFO L225 Difference]: With dead ends: 173509 [2020-07-20 18:34:51,130 INFO L226 Difference]: Without dead ends: 115562 [2020-07-20 18:34:51,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:34:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115562 states. [2020-07-20 18:34:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115562 to 60119. [2020-07-20 18:34:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60119 states. [2020-07-20 18:34:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60119 states to 60119 states and 93701 transitions. [2020-07-20 18:34:56,647 INFO L78 Accepts]: Start accepts. Automaton has 60119 states and 93701 transitions. Word has length 335 [2020-07-20 18:34:56,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:34:56,647 INFO L479 AbstractCegarLoop]: Abstraction has 60119 states and 93701 transitions. [2020-07-20 18:34:56,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:34:56,647 INFO L276 IsEmpty]: Start isEmpty. Operand 60119 states and 93701 transitions. [2020-07-20 18:34:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 18:34:56,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:34:56,662 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] [2020-07-20 18:34:56,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:56,872 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:34:56,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:34:56,873 INFO L82 PathProgramCache]: Analyzing trace with hash -690379219, now seen corresponding path program 1 times [2020-07-20 18:34:56,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:34:56,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783433084] [2020-07-20 18:34:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:34:57,318 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:34:57,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:34:57,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1990 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:34:57,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:34:57,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:34:57,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:34:57,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783433084] [2020-07-20 18:34:57,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:34:57,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:34:57,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683809036] [2020-07-20 18:34:57,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:34:57,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:34:57,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:34:57,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:34:57,448 INFO L87 Difference]: Start difference. First operand 60119 states and 93701 transitions. Second operand 4 states. [2020-07-20 18:35:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:08,685 INFO L93 Difference]: Finished difference Result 178147 states and 277688 transitions. [2020-07-20 18:35:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:35:08,686 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 18:35:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:08,820 INFO L225 Difference]: With dead ends: 178147 [2020-07-20 18:35:08,820 INFO L226 Difference]: Without dead ends: 118105 [2020-07-20 18:35:08,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:35:08,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118105 states. [2020-07-20 18:35:21,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118105 to 118103. [2020-07-20 18:35:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118103 states. [2020-07-20 18:35:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118103 states to 118103 states and 183332 transitions. [2020-07-20 18:35:21,644 INFO L78 Accepts]: Start accepts. Automaton has 118103 states and 183332 transitions. Word has length 337 [2020-07-20 18:35:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:21,645 INFO L479 AbstractCegarLoop]: Abstraction has 118103 states and 183332 transitions. [2020-07-20 18:35:21,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:35:21,645 INFO L276 IsEmpty]: Start isEmpty. Operand 118103 states and 183332 transitions. [2020-07-20 18:35:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 18:35:21,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:21,674 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] [2020-07-20 18:35:21,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:21,875 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:21,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1692215587, now seen corresponding path program 1 times [2020-07-20 18:35:21,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:21,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852102433] [2020-07-20 18:35:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:22,307 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:22,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:22,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1989 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:35:22,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:35:22,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:22,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852102433] [2020-07-20 18:35:22,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:22,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:35:22,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747229721] [2020-07-20 18:35:22,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:35:22,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:22,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:35:22,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:22,402 INFO L87 Difference]: Start difference. First operand 118103 states and 183332 transitions. Second operand 3 states. [2020-07-20 18:35:44,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:44,393 INFO L93 Difference]: Finished difference Result 350004 states and 543055 transitions. [2020-07-20 18:35:44,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:35:44,394 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-20 18:35:44,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:44,664 INFO L225 Difference]: With dead ends: 350004 [2020-07-20 18:35:44,665 INFO L226 Difference]: Without dead ends: 232632 [2020-07-20 18:35:44,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:44,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232632 states. [2020-07-20 18:36:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232632 to 232630. [2020-07-20 18:36:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232630 states. [2020-07-20 18:36:09,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232630 states to 232630 states and 359134 transitions. [2020-07-20 18:36:09,584 INFO L78 Accepts]: Start accepts. Automaton has 232630 states and 359134 transitions. Word has length 339 [2020-07-20 18:36:09,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:09,585 INFO L479 AbstractCegarLoop]: Abstraction has 232630 states and 359134 transitions. [2020-07-20 18:36:09,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:09,585 INFO L276 IsEmpty]: Start isEmpty. Operand 232630 states and 359134 transitions. [2020-07-20 18:36:09,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-20 18:36:09,642 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:09,643 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] [2020-07-20 18:36:09,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:09,844 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:09,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:09,844 INFO L82 PathProgramCache]: Analyzing trace with hash 187223550, now seen corresponding path program 1 times [2020-07-20 18:36:09,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:09,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608335752] [2020-07-20 18:36:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 18:36:10,130 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:36:10,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:10,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 986 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:10,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:10,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:10,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:10,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608335752] [2020-07-20 18:36:10,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:10,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:10,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105508136] [2020-07-20 18:36:10,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:10,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:10,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:10,207 INFO L87 Difference]: Start difference. First operand 232630 states and 359134 transitions. Second operand 3 states. [2020-07-20 18:36:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:56,228 INFO L93 Difference]: Finished difference Result 697595 states and 1076878 transitions. [2020-07-20 18:36:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:56,229 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-20 18:36:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:56,928 INFO L225 Difference]: With dead ends: 697595 [2020-07-20 18:36:56,928 INFO L226 Difference]: Without dead ends: 465114 [2020-07-20 18:36:57,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465114 states. [2020-07-20 18:37:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465114 to 232672. [2020-07-20 18:37:27,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232672 states. [2020-07-20 18:37:27,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232672 states to 232672 states and 359185 transitions. [2020-07-20 18:37:27,579 INFO L78 Accepts]: Start accepts. Automaton has 232672 states and 359185 transitions. Word has length 339 [2020-07-20 18:37:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:37:27,579 INFO L479 AbstractCegarLoop]: Abstraction has 232672 states and 359185 transitions. [2020-07-20 18:37:27,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:37:27,579 INFO L276 IsEmpty]: Start isEmpty. Operand 232672 states and 359185 transitions. [2020-07-20 18:37:27,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 18:37:27,660 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:37:27,660 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] [2020-07-20 18:37:28,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:37:28,281 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:37:28,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:37:28,281 INFO L82 PathProgramCache]: Analyzing trace with hash -454176992, now seen corresponding path program 1 times [2020-07-20 18:37:28,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:37:28,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802519161] [2020-07-20 18:37:28,282 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 18:37:28,711 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:37:28,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:37:28,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1989 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:37:28,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:37:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:37:28,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:37:28,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802519161] [2020-07-20 18:37:28,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:37:28,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:37:28,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491649712] [2020-07-20 18:37:28,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:37:28,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:37:28,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:37:28,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:37:28,769 INFO L87 Difference]: Start difference. First operand 232672 states and 359185 transitions. Second operand 3 states. [2020-07-20 18:38:19,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:38:19,993 INFO L93 Difference]: Finished difference Result 697661 states and 1076968 transitions. [2020-07-20 18:38:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:38:19,993 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 340 [2020-07-20 18:38:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:38:20,661 INFO L225 Difference]: With dead ends: 697661 [2020-07-20 18:38:20,661 INFO L226 Difference]: Without dead ends: 465183 [2020-07-20 18:38:20,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:38:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465183 states. [2020-07-20 18:38:52,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465183 to 232741. [2020-07-20 18:38:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232741 states. [2020-07-20 18:38:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232741 states to 232741 states and 359281 transitions. [2020-07-20 18:38:52,908 INFO L78 Accepts]: Start accepts. Automaton has 232741 states and 359281 transitions. Word has length 340 [2020-07-20 18:38:52,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:38:52,908 INFO L479 AbstractCegarLoop]: Abstraction has 232741 states and 359281 transitions. [2020-07-20 18:38:52,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:38:52,908 INFO L276 IsEmpty]: Start isEmpty. Operand 232741 states and 359281 transitions. [2020-07-20 18:38:52,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 18:38:52,968 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:38:52,968 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:38:53,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:38:53,169 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:38:53,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:38:53,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1263838264, now seen corresponding path program 1 times [2020-07-20 18:38:53,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:38:53,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94902368] [2020-07-20 18:38:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 18:38:53,606 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:38:53,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:38:53,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 1994 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:38:53,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:38:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:38:53,706 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:38:53,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94902368] [2020-07-20 18:38:53,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:38:53,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:38:53,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852430387] [2020-07-20 18:38:53,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:38:53,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:38:53,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:38:53,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:38:53,707 INFO L87 Difference]: Start difference. First operand 232741 states and 359281 transitions. Second operand 3 states. [2020-07-20 18:39:45,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:39:45,565 INFO L93 Difference]: Finished difference Result 687488 states and 1060798 transitions. [2020-07-20 18:39:45,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:39:45,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-20 18:39:45,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:39:46,222 INFO L225 Difference]: With dead ends: 687488 [2020-07-20 18:39:46,223 INFO L226 Difference]: Without dead ends: 455758 [2020-07-20 18:39:46,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:39:46,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455758 states. [2020-07-20 18:40:43,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455758 to 455756. [2020-07-20 18:40:43,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455756 states. [2020-07-20 18:40:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455756 states to 455756 states and 699158 transitions. [2020-07-20 18:40:44,182 INFO L78 Accepts]: Start accepts. Automaton has 455756 states and 699158 transitions. Word has length 341 [2020-07-20 18:40:44,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:40:44,182 INFO L479 AbstractCegarLoop]: Abstraction has 455756 states and 699158 transitions. [2020-07-20 18:40:44,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:40:44,182 INFO L276 IsEmpty]: Start isEmpty. Operand 455756 states and 699158 transitions. [2020-07-20 18:40:44,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-20 18:40:44,306 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:40:44,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:40:44,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:40:44,507 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:40:44,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:40:44,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1890997685, now seen corresponding path program 1 times [2020-07-20 18:40:44,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:40:44,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209451770] [2020-07-20 18:40:44,509 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 18:40:44,790 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:40:44,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:40:44,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:40:44,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:40:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:40:44,859 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:40:44,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209451770] [2020-07-20 18:40:44,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:40:44,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:40:44,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874794916] [2020-07-20 18:40:44,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:40:44,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:40:44,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:40:44,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:40:44,860 INFO L87 Difference]: Start difference. First operand 455756 states and 699158 transitions. Second operand 4 states. [2020-07-20 18:41:42,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:41:42,151 INFO L93 Difference]: Finished difference Result 926897 states and 1421139 transitions. [2020-07-20 18:41:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:41:42,151 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 341 [2020-07-20 18:41:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:41:42,826 INFO L225 Difference]: With dead ends: 926897 [2020-07-20 18:41:42,827 INFO L226 Difference]: Without dead ends: 463492 [2020-07-20 18:41:43,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:41:43,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463492 states. [2020-07-20 18:42:43,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463492 to 463490. [2020-07-20 18:42:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 463490 states. [2020-07-20 18:42:43,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463490 states to 463490 states and 706594 transitions. [2020-07-20 18:42:43,776 INFO L78 Accepts]: Start accepts. Automaton has 463490 states and 706594 transitions. Word has length 341 [2020-07-20 18:42:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:42:43,777 INFO L479 AbstractCegarLoop]: Abstraction has 463490 states and 706594 transitions. [2020-07-20 18:42:43,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:42:43,777 INFO L276 IsEmpty]: Start isEmpty. Operand 463490 states and 706594 transitions. [2020-07-20 18:42:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 18:42:43,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:42:43,914 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] [2020-07-20 18:42:44,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:42:44,115 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:42:44,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:42:44,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2044990163, now seen corresponding path program 1 times [2020-07-20 18:42:44,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:42:44,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296022161] [2020-07-20 18:42:44,117 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 18:42:44,399 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:42:44,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:42:44,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:42:44,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:42:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:42:44,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:42:44,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296022161] [2020-07-20 18:42:44,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:42:44,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:42:44,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77530258] [2020-07-20 18:42:44,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:42:44,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:42:44,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:42:44,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:42:44,453 INFO L87 Difference]: Start difference. First operand 463490 states and 706594 transitions. Second operand 3 states. [2020-07-20 18:44:36,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:44:36,982 INFO L93 Difference]: Finished difference Result 1386256 states and 2112976 transitions. [2020-07-20 18:44:36,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:44:36,983 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-20 18:44:36,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:44:38,416 INFO L225 Difference]: With dead ends: 1386256 [2020-07-20 18:44:38,416 INFO L226 Difference]: Without dead ends: 923008 [2020-07-20 18:44:38,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:44:39,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923008 states.