/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 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:33:07,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:33:07,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:33:07,546 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:33:07,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:33:07,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:33:07,548 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:33:07,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:33:07,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:33:07,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:33:07,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:33:07,555 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:33:07,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:33:07,556 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:33:07,557 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:33:07,558 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:33:07,559 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:33:07,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:33:07,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:33:07,563 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:33:07,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:33:07,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:33:07,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:33:07,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:33:07,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 17:33:07,571 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 17:33:07,571 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 17:33:07,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 17:33:07,572 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 17:33:07,573 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 17:33:07,573 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 17:33:07,574 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 17:33:07,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 17:33:07,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 17:33:07,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 17:33:07,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 17:33:07,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 17:33:07,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 17:33:07,578 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:33:07,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:33:07,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:33:07,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 17:33:07,610 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:33:07,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:33:07,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:33:07,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:33:07,612 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:33:07,613 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:33:07,613 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 17:33:07,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:33:07,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 17:33:07,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:33:07,615 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:33:07,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:33:07,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:33:07,615 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 17:33:07,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:33:07,616 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:33:07,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:33:07,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:33:07,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:33:07,617 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:33:07,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:33:07,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:33:07,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:33:07,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:33:07,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:33:07,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:33:07,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:07,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:33:07,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:33:07,618 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 -> 2 [2020-07-21 17:33:07,918 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:33:07,931 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:33:07,934 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:33:07,936 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:33:07,936 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:33:07,937 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 17:33:07,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dcafed34/46bef4e76d70460aa83bb057fd025bf0/FLAG5ef5e62f0 [2020-07-21 17:33:08,725 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:33:08,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 17:33:08,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dcafed34/46bef4e76d70460aa83bb057fd025bf0/FLAG5ef5e62f0 [2020-07-21 17:33:08,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7dcafed34/46bef4e76d70460aa83bb057fd025bf0 [2020-07-21 17:33:08,816 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:33:08,819 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:33:08,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:33:08,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:33:08,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:33:08,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:33:08" (1/1) ... [2020-07-21 17:33:08,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@662b6655 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:33:08, skipping insertion in model container [2020-07-21 17:33:08,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:33:08" (1/1) ... [2020-07-21 17:33:08,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:33:09,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:33:10,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:33:10,661 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:33:11,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:33:11,923 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:33:11,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:33:11 WrapperNode [2020-07-21 17:33:11,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:33:11,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:33:11,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:33:11,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:33:11,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:33:11" (1/1) ... [2020-07-21 17:33:11,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:33:11" (1/1) ... [2020-07-21 17:33:11,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:33:11" (1/1) ... [2020-07-21 17:33:11,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:33:11" (1/1) ... [2020-07-21 17:33:12,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:33:11" (1/1) ... [2020-07-21 17:33:12,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:33:11" (1/1) ... [2020-07-21 17:33:12,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:33:11" (1/1) ... [2020-07-21 17:33:12,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:33:12,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:33:12,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:33:12,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:33:12,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:33:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:33:12,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:33:12,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:33:12,253 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 17:33:12,254 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:33:12,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:33:12,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 17:33:12,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 17:33:12,255 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 17:33:12,255 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 17:33:12,255 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 17:33:12,255 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 17:33:12,256 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 17:33:12,256 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 17:33:12,256 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 17:33:12,256 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 17:33:12,257 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 17:33:12,257 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 17:33:12,257 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 17:33:12,257 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 17:33:12,258 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:33:12,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:33:12,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:33:16,535 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:33:16,537 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 17:33:16,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:33:16 BoogieIcfgContainer [2020-07-21 17:33:16,554 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:33:16,555 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:33:16,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:33:16,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:33:16,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:33:08" (1/3) ... [2020-07-21 17:33:16,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce39704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:33:16, skipping insertion in model container [2020-07-21 17:33:16,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:33:11" (2/3) ... [2020-07-21 17:33:16,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ce39704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:33:16, skipping insertion in model container [2020-07-21 17:33:16,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:33:16" (3/3) ... [2020-07-21 17:33:16,563 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 17:33:16,574 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:33:16,587 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:33:16,599 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:33:16,628 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:33:16,628 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:33:16,628 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:33:16,628 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:33:16,629 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:33:16,629 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:33:16,629 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:33:16,629 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:33:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2020-07-21 17:33:16,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 17:33:16,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:16,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:16,720 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:16,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:16,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times [2020-07-21 17:33:16,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:16,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189445497] [2020-07-21 17:33:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:17,491 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:33:17,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:17,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 3101 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:33:17,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:17,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:17,972 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:17,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189445497] [2020-07-21 17:33:17,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:17,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:33:17,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712333153] [2020-07-21 17:33:17,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:33:17,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:18,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:33:18,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:33:18,013 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 4 states. [2020-07-21 17:33:18,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:18,631 INFO L93 Difference]: Finished difference Result 4237 states and 7634 transitions. [2020-07-21 17:33:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:33:18,633 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-07-21 17:33:18,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:18,679 INFO L225 Difference]: With dead ends: 4237 [2020-07-21 17:33:18,680 INFO L226 Difference]: Without dead ends: 2813 [2020-07-21 17:33:18,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:33:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2020-07-21 17:33:18,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2811. [2020-07-21 17:33:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2811 states. [2020-07-21 17:33:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4637 transitions. [2020-07-21 17:33:18,942 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4637 transitions. Word has length 487 [2020-07-21 17:33:18,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:18,952 INFO L479 AbstractCegarLoop]: Abstraction has 2811 states and 4637 transitions. [2020-07-21 17:33:18,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:33:18,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4637 transitions. [2020-07-21 17:33:18,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 17:33:18,975 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:18,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:19,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:19,193 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:19,194 INFO L82 PathProgramCache]: Analyzing trace with hash -603864616, now seen corresponding path program 1 times [2020-07-21 17:33:19,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:19,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281012733] [2020-07-21 17:33:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:19,840 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:33:19,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:19,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 3104 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:33:19,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:20,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:20,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281012733] [2020-07-21 17:33:20,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:20,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:20,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600021495] [2020-07-21 17:33:20,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:20,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:20,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:20,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:20,257 INFO L87 Difference]: Start difference. First operand 2811 states and 4637 transitions. Second operand 3 states. [2020-07-21 17:33:20,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:20,553 INFO L93 Difference]: Finished difference Result 8124 states and 13359 transitions. [2020-07-21 17:33:20,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:33:20,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 17:33:20,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:20,583 INFO L225 Difference]: With dead ends: 8124 [2020-07-21 17:33:20,583 INFO L226 Difference]: Without dead ends: 5542 [2020-07-21 17:33:20,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:20,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2020-07-21 17:33:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 5540. [2020-07-21 17:33:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5540 states. [2020-07-21 17:33:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 9108 transitions. [2020-07-21 17:33:20,828 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 9108 transitions. Word has length 489 [2020-07-21 17:33:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:20,829 INFO L479 AbstractCegarLoop]: Abstraction has 5540 states and 9108 transitions. [2020-07-21 17:33:20,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:33:20,830 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 9108 transitions. [2020-07-21 17:33:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 17:33:20,850 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:20,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:21,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:21,066 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:21,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:21,067 INFO L82 PathProgramCache]: Analyzing trace with hash -522806972, now seen corresponding path program 1 times [2020-07-21 17:33:21,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:21,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542885010] [2020-07-21 17:33:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:21,661 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:33:21,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:21,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 3106 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:33:21,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:21,885 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:21,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542885010] [2020-07-21 17:33:21,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:21,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:21,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140478375] [2020-07-21 17:33:21,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:21,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:21,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:21,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:21,889 INFO L87 Difference]: Start difference. First operand 5540 states and 9108 transitions. Second operand 3 states. [2020-07-21 17:33:22,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:22,238 INFO L93 Difference]: Finished difference Result 16364 states and 26861 transitions. [2020-07-21 17:33:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:33:22,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 17:33:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:22,292 INFO L225 Difference]: With dead ends: 16364 [2020-07-21 17:33:22,292 INFO L226 Difference]: Without dead ends: 10855 [2020-07-21 17:33:22,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:22,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2020-07-21 17:33:22,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 5566. [2020-07-21 17:33:22,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5566 states. [2020-07-21 17:33:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5566 states to 5566 states and 9146 transitions. [2020-07-21 17:33:22,606 INFO L78 Accepts]: Start accepts. Automaton has 5566 states and 9146 transitions. Word has length 490 [2020-07-21 17:33:22,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:22,607 INFO L479 AbstractCegarLoop]: Abstraction has 5566 states and 9146 transitions. [2020-07-21 17:33:22,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:33:22,607 INFO L276 IsEmpty]: Start isEmpty. Operand 5566 states and 9146 transitions. [2020-07-21 17:33:22,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 17:33:22,623 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:22,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:22,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:22,838 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:22,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1278928061, now seen corresponding path program 1 times [2020-07-21 17:33:22,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:22,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034625005] [2020-07-21 17:33:22,841 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:23,411 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:33:23,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:23,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 3107 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:33:23,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:23,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:23,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034625005] [2020-07-21 17:33:23,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:23,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:23,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611648113] [2020-07-21 17:33:23,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:23,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:23,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:23,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:23,681 INFO L87 Difference]: Start difference. First operand 5566 states and 9146 transitions. Second operand 3 states. [2020-07-21 17:33:24,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:24,121 INFO L93 Difference]: Finished difference Result 16190 states and 26546 transitions. [2020-07-21 17:33:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:33:24,122 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 17:33:24,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:24,183 INFO L225 Difference]: With dead ends: 16190 [2020-07-21 17:33:24,184 INFO L226 Difference]: Without dead ends: 10936 [2020-07-21 17:33:24,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:24,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10936 states. [2020-07-21 17:33:25,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10936 to 10934. [2020-07-21 17:33:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10934 states. [2020-07-21 17:33:25,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10934 states to 10934 states and 17897 transitions. [2020-07-21 17:33:25,194 INFO L78 Accepts]: Start accepts. Automaton has 10934 states and 17897 transitions. Word has length 491 [2020-07-21 17:33:25,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:25,195 INFO L479 AbstractCegarLoop]: Abstraction has 10934 states and 17897 transitions. [2020-07-21 17:33:25,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:33:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 10934 states and 17897 transitions. [2020-07-21 17:33:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 17:33:25,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:25,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:25,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:25,437 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:25,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:25,437 INFO L82 PathProgramCache]: Analyzing trace with hash 510537176, now seen corresponding path program 1 times [2020-07-21 17:33:25,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:25,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384192347] [2020-07-21 17:33:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:25,798 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:33:25,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:25,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:33:25,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:25,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:25,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384192347] [2020-07-21 17:33:25,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:25,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:25,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019830696] [2020-07-21 17:33:25,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:25,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:25,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:25,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:25,922 INFO L87 Difference]: Start difference. First operand 10934 states and 17897 transitions. Second operand 3 states. [2020-07-21 17:33:26,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:26,565 INFO L93 Difference]: Finished difference Result 32666 states and 53459 transitions. [2020-07-21 17:33:26,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:33:26,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-21 17:33:26,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:26,623 INFO L225 Difference]: With dead ends: 32666 [2020-07-21 17:33:26,623 INFO L226 Difference]: Without dead ends: 21796 [2020-07-21 17:33:26,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21796 states. [2020-07-21 17:33:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21796 to 11010. [2020-07-21 17:33:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11010 states. [2020-07-21 17:33:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11010 states to 11010 states and 18003 transitions. [2020-07-21 17:33:27,140 INFO L78 Accepts]: Start accepts. Automaton has 11010 states and 18003 transitions. Word has length 491 [2020-07-21 17:33:27,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:27,141 INFO L479 AbstractCegarLoop]: Abstraction has 11010 states and 18003 transitions. [2020-07-21 17:33:27,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:33:27,141 INFO L276 IsEmpty]: Start isEmpty. Operand 11010 states and 18003 transitions. [2020-07-21 17:33:27,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 17:33:27,163 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:27,164 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:27,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:27,377 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1843762688, now seen corresponding path program 1 times [2020-07-21 17:33:27,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:27,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99667789] [2020-07-21 17:33:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:27,765 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:33:27,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:27,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 1716 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 17:33:27,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:28,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:28,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99667789] [2020-07-21 17:33:28,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:28,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:33:28,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688629942] [2020-07-21 17:33:28,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:33:28,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:28,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:33:28,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:33:28,114 INFO L87 Difference]: Start difference. First operand 11010 states and 18003 transitions. Second operand 4 states. [2020-07-21 17:33:28,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:28,961 INFO L93 Difference]: Finished difference Result 31242 states and 50802 transitions. [2020-07-21 17:33:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 17:33:28,962 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-21 17:33:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:29,022 INFO L225 Difference]: With dead ends: 31242 [2020-07-21 17:33:29,022 INFO L226 Difference]: Without dead ends: 21472 [2020-07-21 17:33:29,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:33:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21472 states. [2020-07-21 17:33:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21472 to 11918. [2020-07-21 17:33:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11918 states. [2020-07-21 17:33:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11918 states to 11918 states and 19632 transitions. [2020-07-21 17:33:29,708 INFO L78 Accepts]: Start accepts. Automaton has 11918 states and 19632 transitions. Word has length 492 [2020-07-21 17:33:29,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:29,709 INFO L479 AbstractCegarLoop]: Abstraction has 11918 states and 19632 transitions. [2020-07-21 17:33:29,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 17:33:29,709 INFO L276 IsEmpty]: Start isEmpty. Operand 11918 states and 19632 transitions. [2020-07-21 17:33:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 17:33:29,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:29,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:29,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:29,943 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:29,943 INFO L82 PathProgramCache]: Analyzing trace with hash 83179837, now seen corresponding path program 1 times [2020-07-21 17:33:29,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:29,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066665212] [2020-07-21 17:33:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:30,485 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:33:30,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:30,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 3109 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:33:30,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:30,625 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:30,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066665212] [2020-07-21 17:33:30,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:30,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:30,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478836829] [2020-07-21 17:33:30,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:30,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:30,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:30,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:30,627 INFO L87 Difference]: Start difference. First operand 11918 states and 19632 transitions. Second operand 3 states. [2020-07-21 17:33:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:31,804 INFO L93 Difference]: Finished difference Result 35505 states and 58497 transitions. [2020-07-21 17:33:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:33:31,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 17:33:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:31,862 INFO L225 Difference]: With dead ends: 35505 [2020-07-21 17:33:31,863 INFO L226 Difference]: Without dead ends: 23667 [2020-07-21 17:33:31,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:31,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23667 states. [2020-07-21 17:33:32,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23667 to 12025. [2020-07-21 17:33:32,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12025 states. [2020-07-21 17:33:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12025 states to 12025 states and 19779 transitions. [2020-07-21 17:33:32,515 INFO L78 Accepts]: Start accepts. Automaton has 12025 states and 19779 transitions. Word has length 492 [2020-07-21 17:33:32,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:32,515 INFO L479 AbstractCegarLoop]: Abstraction has 12025 states and 19779 transitions. [2020-07-21 17:33:32,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:33:32,515 INFO L276 IsEmpty]: Start isEmpty. Operand 12025 states and 19779 transitions. [2020-07-21 17:33:32,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 17:33:32,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:32,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:32,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:32,733 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:32,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:32,734 INFO L82 PathProgramCache]: Analyzing trace with hash 237122314, now seen corresponding path program 1 times [2020-07-21 17:33:32,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:32,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771416813] [2020-07-21 17:33:32,736 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:33,109 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:33:33,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:33,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1724 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:33:33,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:33,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:33,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771416813] [2020-07-21 17:33:33,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:33,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:33:33,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955528535] [2020-07-21 17:33:33,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:33:33,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:33,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:33:33,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:33:33,381 INFO L87 Difference]: Start difference. First operand 12025 states and 19779 transitions. Second operand 9 states. [2020-07-21 17:33:42,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:42,872 INFO L93 Difference]: Finished difference Result 67749 states and 109478 transitions. [2020-07-21 17:33:42,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 17:33:42,873 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 493 [2020-07-21 17:33:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:43,026 INFO L225 Difference]: With dead ends: 67749 [2020-07-21 17:33:43,026 INFO L226 Difference]: Without dead ends: 65879 [2020-07-21 17:33:43,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 17:33:43,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65879 states. [2020-07-21 17:33:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65879 to 24699. [2020-07-21 17:33:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24699 states. [2020-07-21 17:33:44,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24699 states to 24699 states and 40001 transitions. [2020-07-21 17:33:44,516 INFO L78 Accepts]: Start accepts. Automaton has 24699 states and 40001 transitions. Word has length 493 [2020-07-21 17:33:44,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:44,516 INFO L479 AbstractCegarLoop]: Abstraction has 24699 states and 40001 transitions. [2020-07-21 17:33:44,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:33:44,517 INFO L276 IsEmpty]: Start isEmpty. Operand 24699 states and 40001 transitions. [2020-07-21 17:33:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 17:33:44,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:44,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:44,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:44,741 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:44,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash 720769662, now seen corresponding path program 1 times [2020-07-21 17:33:44,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:44,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571573893] [2020-07-21 17:33:44,743 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:45,317 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:33:45,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:45,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 3116 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:33:45,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:45,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:45,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571573893] [2020-07-21 17:33:45,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:45,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:45,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159488112] [2020-07-21 17:33:45,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:45,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:45,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:45,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:45,470 INFO L87 Difference]: Start difference. First operand 24699 states and 40001 transitions. Second operand 3 states. [2020-07-21 17:33:47,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:47,283 INFO L93 Difference]: Finished difference Result 53859 states and 86607 transitions. [2020-07-21 17:33:47,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:33:47,284 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2020-07-21 17:33:47,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:47,366 INFO L225 Difference]: With dead ends: 53859 [2020-07-21 17:33:47,366 INFO L226 Difference]: Without dead ends: 34559 [2020-07-21 17:33:47,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:47,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34559 states. [2020-07-21 17:33:48,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34559 to 29087. [2020-07-21 17:33:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29087 states. [2020-07-21 17:33:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29087 states to 29087 states and 47273 transitions. [2020-07-21 17:33:48,837 INFO L78 Accepts]: Start accepts. Automaton has 29087 states and 47273 transitions. Word has length 493 [2020-07-21 17:33:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:48,837 INFO L479 AbstractCegarLoop]: Abstraction has 29087 states and 47273 transitions. [2020-07-21 17:33:48,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:33:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 29087 states and 47273 transitions. [2020-07-21 17:33:48,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 17:33:48,855 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:48,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:49,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:49,058 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:49,059 INFO L82 PathProgramCache]: Analyzing trace with hash -2136396926, now seen corresponding path program 1 times [2020-07-21 17:33:49,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:49,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43449231] [2020-07-21 17:33:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:49,630 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:33:49,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:49,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 3110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:33:49,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:49,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:49,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43449231] [2020-07-21 17:33:49,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:49,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:33:49,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160302664] [2020-07-21 17:33:49,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:33:49,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:49,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:33:49,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:49,856 INFO L87 Difference]: Start difference. First operand 29087 states and 47273 transitions. Second operand 3 states. [2020-07-21 17:33:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:33:52,006 INFO L93 Difference]: Finished difference Result 84066 states and 136285 transitions. [2020-07-21 17:33:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:33:52,007 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2020-07-21 17:33:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:33:52,101 INFO L225 Difference]: With dead ends: 84066 [2020-07-21 17:33:52,101 INFO L226 Difference]: Without dead ends: 56512 [2020-07-21 17:33:52,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:33:52,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56512 states. [2020-07-21 17:33:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56512 to 56510. [2020-07-21 17:33:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56510 states. [2020-07-21 17:33:54,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56510 states to 56510 states and 91436 transitions. [2020-07-21 17:33:54,671 INFO L78 Accepts]: Start accepts. Automaton has 56510 states and 91436 transitions. Word has length 493 [2020-07-21 17:33:54,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:33:54,671 INFO L479 AbstractCegarLoop]: Abstraction has 56510 states and 91436 transitions. [2020-07-21 17:33:54,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:33:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 56510 states and 91436 transitions. [2020-07-21 17:33:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 17:33:54,713 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:33:54,714 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:33:54,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:54,928 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:33:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:33:54,929 INFO L82 PathProgramCache]: Analyzing trace with hash 365059678, now seen corresponding path program 1 times [2020-07-21 17:33:54,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:33:54,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42086601] [2020-07-21 17:33:54,930 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:33:56,531 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:33:56,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:33:56,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 1729 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 17:33:56,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:33:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:33:56,713 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:33:56,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42086601] [2020-07-21 17:33:56,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:33:56,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 17:33:56,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929778779] [2020-07-21 17:33:56,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 17:33:56,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:33:56,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 17:33:56,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:33:56,715 INFO L87 Difference]: Start difference. First operand 56510 states and 91436 transitions. Second operand 9 states. [2020-07-21 17:34:20,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:34:20,450 INFO L93 Difference]: Finished difference Result 338271 states and 549641 transitions. [2020-07-21 17:34:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 17:34:20,450 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 495 [2020-07-21 17:34:20,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:34:20,987 INFO L225 Difference]: With dead ends: 338271 [2020-07-21 17:34:20,987 INFO L226 Difference]: Without dead ends: 321213 [2020-07-21 17:34:21,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 17:34:21,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321213 states. [2020-07-21 17:34:28,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321213 to 117458. [2020-07-21 17:34:28,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117458 states. [2020-07-21 17:34:28,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117458 states to 117458 states and 189500 transitions. [2020-07-21 17:34:28,458 INFO L78 Accepts]: Start accepts. Automaton has 117458 states and 189500 transitions. Word has length 495 [2020-07-21 17:34:28,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:34:28,459 INFO L479 AbstractCegarLoop]: Abstraction has 117458 states and 189500 transitions. [2020-07-21 17:34:28,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 17:34:28,459 INFO L276 IsEmpty]: Start isEmpty. Operand 117458 states and 189500 transitions. [2020-07-21 17:34:28,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 17:34:28,520 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:34:28,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:34:28,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:28,727 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:34:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:34:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1128237631, now seen corresponding path program 1 times [2020-07-21 17:34:28,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:34:28,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234660078] [2020-07-21 17:34:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:29,282 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:34:29,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:34:29,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 3119 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 17:34:29,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:34:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:34:29,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:34:29,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234660078] [2020-07-21 17:34:29,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:34:29,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:34:29,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936552430] [2020-07-21 17:34:29,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:34:29,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:34:29,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:34:29,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:34:29,463 INFO L87 Difference]: Start difference. First operand 117458 states and 189500 transitions. Second operand 3 states. [2020-07-21 17:34:40,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:34:40,039 INFO L93 Difference]: Finished difference Result 283918 states and 458686 transitions. [2020-07-21 17:34:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:34:40,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 17:34:40,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:34:40,292 INFO L225 Difference]: With dead ends: 283918 [2020-07-21 17:34:40,293 INFO L226 Difference]: Without dead ends: 176684 [2020-07-21 17:34:40,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:34:40,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176684 states. [2020-07-21 17:34:51,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176684 to 152946. [2020-07-21 17:34:51,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152946 states. [2020-07-21 17:34:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152946 states to 152946 states and 247200 transitions. [2020-07-21 17:34:51,268 INFO L78 Accepts]: Start accepts. Automaton has 152946 states and 247200 transitions. Word has length 495 [2020-07-21 17:34:51,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:34:51,269 INFO L479 AbstractCegarLoop]: Abstraction has 152946 states and 247200 transitions. [2020-07-21 17:34:51,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:34:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 152946 states and 247200 transitions. [2020-07-21 17:34:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 17:34:51,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:34:51,326 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:34:51,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:51,527 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:34:51,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:34:51,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1424710819, now seen corresponding path program 1 times [2020-07-21 17:34:51,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:34:51,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19967018] [2020-07-21 17:34:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:34:51,930 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:34:51,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:34:51,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 17:34:51,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:34:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:34:52,414 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:34:52,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19967018] [2020-07-21 17:34:52,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:34:52,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-21 17:34:52,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794139713] [2020-07-21 17:34:52,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 17:34:52,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:34:52,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 17:34:52,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-21 17:34:52,417 INFO L87 Difference]: Start difference. First operand 152946 states and 247200 transitions. Second operand 12 states. [2020-07-21 17:34:55,396 WARN L193 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 23 [2020-07-21 17:35:56,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:35:56,546 INFO L93 Difference]: Finished difference Result 783172 states and 1270417 transitions. [2020-07-21 17:35:56,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-21 17:35:56,547 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 496 [2020-07-21 17:35:56,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:35:57,593 INFO L225 Difference]: With dead ends: 783172 [2020-07-21 17:35:57,594 INFO L226 Difference]: Without dead ends: 687958 [2020-07-21 17:35:57,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=552, Invalid=1704, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 17:35:58,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687958 states. [2020-07-21 17:36:18,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687958 to 141406. [2020-07-21 17:36:18,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141406 states. [2020-07-21 17:36:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141406 states to 141406 states and 227896 transitions. [2020-07-21 17:36:18,347 INFO L78 Accepts]: Start accepts. Automaton has 141406 states and 227896 transitions. Word has length 496 [2020-07-21 17:36:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:36:18,348 INFO L479 AbstractCegarLoop]: Abstraction has 141406 states and 227896 transitions. [2020-07-21 17:36:18,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 17:36:18,349 INFO L276 IsEmpty]: Start isEmpty. Operand 141406 states and 227896 transitions. [2020-07-21 17:36:18,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 17:36:18,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:36:18,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:36:18,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:18,599 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:36:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:36:18,600 INFO L82 PathProgramCache]: Analyzing trace with hash -941063471, now seen corresponding path program 1 times [2020-07-21 17:36:18,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:36:18,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791142375] [2020-07-21 17:36:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:36:19,149 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:36:19,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:36:19,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 3121 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:36:19,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:36:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:36:20,279 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:36:20,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791142375] [2020-07-21 17:36:20,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:36:20,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:36:20,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603035380] [2020-07-21 17:36:20,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:36:20,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:36:20,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:36:20,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:36:20,281 INFO L87 Difference]: Start difference. First operand 141406 states and 227896 transitions. Second operand 5 states. [2020-07-21 17:36:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:36:43,986 INFO L93 Difference]: Finished difference Result 360114 states and 582618 transitions. [2020-07-21 17:36:43,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:36:43,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-07-21 17:36:43,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:36:44,423 INFO L225 Difference]: With dead ends: 360114 [2020-07-21 17:36:44,424 INFO L226 Difference]: Without dead ends: 271024 [2020-07-21 17:36:44,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:36:44,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271024 states. [2020-07-21 17:37:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271024 to 271022. [2020-07-21 17:37:13,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271022 states. [2020-07-21 17:37:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271022 states to 271022 states and 435724 transitions. [2020-07-21 17:37:13,695 INFO L78 Accepts]: Start accepts. Automaton has 271022 states and 435724 transitions. Word has length 496 [2020-07-21 17:37:13,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:37:13,696 INFO L479 AbstractCegarLoop]: Abstraction has 271022 states and 435724 transitions. [2020-07-21 17:37:13,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:37:13,696 INFO L276 IsEmpty]: Start isEmpty. Operand 271022 states and 435724 transitions. [2020-07-21 17:37:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 17:37:13,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:37:13,803 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:37:14,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:37:14,004 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:37:14,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:37:14,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1788849025, now seen corresponding path program 1 times [2020-07-21 17:37:14,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:37:14,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233931020] [2020-07-21 17:37:14,007 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:37:14,360 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:37:14,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:37:14,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 17:37:14,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:37:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:37:14,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:37:14,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233931020] [2020-07-21 17:37:14,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:37:14,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:37:14,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410192214] [2020-07-21 17:37:14,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:37:14,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:37:14,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:37:14,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:37:14,496 INFO L87 Difference]: Start difference. First operand 271022 states and 435724 transitions. Second operand 3 states. [2020-07-21 17:38:02,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:38:02,736 INFO L93 Difference]: Finished difference Result 693222 states and 1121454 transitions. [2020-07-21 17:38:02,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:38:02,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 17:38:02,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:38:03,474 INFO L225 Difference]: With dead ends: 693222 [2020-07-21 17:38:03,474 INFO L226 Difference]: Without dead ends: 514640 [2020-07-21 17:38:03,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:38:04,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514640 states. [2020-07-21 17:39:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514640 to 514638. [2020-07-21 17:39:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514638 states. [2020-07-21 17:39:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514638 states to 514638 states and 827396 transitions. [2020-07-21 17:39:02,271 INFO L78 Accepts]: Start accepts. Automaton has 514638 states and 827396 transitions. Word has length 496 [2020-07-21 17:39:02,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:39:02,272 INFO L479 AbstractCegarLoop]: Abstraction has 514638 states and 827396 transitions. [2020-07-21 17:39:02,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:39:02,272 INFO L276 IsEmpty]: Start isEmpty. Operand 514638 states and 827396 transitions. [2020-07-21 17:39:02,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 17:39:02,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:39:02,450 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:39:02,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:39:02,651 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:39:02,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:39:02,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1578667646, now seen corresponding path program 1 times [2020-07-21 17:39:02,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:39:02,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107201074] [2020-07-21 17:39:02,653 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:39:04,087 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:39:04,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:39:04,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 3126 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 17:39:04,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:39:04,203 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:39:04,246 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:39:04,281 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:39:04,420 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:39:04,421 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 17:39:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:39:05,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:39:05,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107201074] [2020-07-21 17:39:05,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:39:05,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-21 17:39:05,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100441280] [2020-07-21 17:39:05,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 17:39:05,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:39:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 17:39:05,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-07-21 17:39:05,205 INFO L87 Difference]: Start difference. First operand 514638 states and 827396 transitions. Second operand 14 states. [2020-07-21 17:42:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:42:44,788 INFO L93 Difference]: Finished difference Result 1639461 states and 2659792 transitions. [2020-07-21 17:42:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-21 17:42:44,788 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 496 [2020-07-21 17:42:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:42:47,235 INFO L225 Difference]: With dead ends: 1639461 [2020-07-21 17:42:47,236 INFO L226 Difference]: Without dead ends: 1495463 [2020-07-21 17:42:47,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=519, Invalid=1551, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 17:42:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495463 states. [2020-07-21 17:44:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495463 to 552606. [2020-07-21 17:44:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552606 states. [2020-07-21 17:44:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552606 states to 552606 states and 888008 transitions. [2020-07-21 17:44:13,037 INFO L78 Accepts]: Start accepts. Automaton has 552606 states and 888008 transitions. Word has length 496 [2020-07-21 17:44:13,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:44:13,038 INFO L479 AbstractCegarLoop]: Abstraction has 552606 states and 888008 transitions. [2020-07-21 17:44:13,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 17:44:13,038 INFO L276 IsEmpty]: Start isEmpty. Operand 552606 states and 888008 transitions. [2020-07-21 17:44:13,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 17:44:13,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:44:13,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 17:44:13,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:44:13,440 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:44:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:44:13,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1095020298, now seen corresponding path program 1 times [2020-07-21 17:44:13,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:44:13,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464404262] [2020-07-21 17:44:13,442 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:44:14,004 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:44:14,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:44:14,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 3122 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 17:44:14,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:44:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:44:14,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:44:14,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464404262] [2020-07-21 17:44:14,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:44:14,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 17:44:14,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23183590] [2020-07-21 17:44:14,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 17:44:14,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:44:14,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 17:44:14,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 17:44:14,819 INFO L87 Difference]: Start difference. First operand 552606 states and 888008 transitions. Second operand 4 states.