/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:28:48,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:28:48,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:28:48,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:28:48,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:28:48,480 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:28:48,481 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:28:48,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:28:48,496 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:28:48,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:28:48,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:28:48,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:28:48,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:28:48,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:28:48,508 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:28:48,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:28:48,512 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:28:48,513 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:28:48,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:28:48,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:28:48,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:28:48,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:28:48,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:28:48,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:28:48,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:28:48,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:28:48,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:28:48,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:28:48,545 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 12:28:48,563 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:28:48,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:28:48,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:28:48,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:28:48,566 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:28:48,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:28:48,566 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:28:48,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:28:48,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:28:48,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:28:48,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:28:48,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:28:48,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:28:48,569 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:28:48,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:28:48,569 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:28:48,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:28:48,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:28:48,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:28:48,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:28:48,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:28:48,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:28:48,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:28:48,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:28:48,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:28:48,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:28:48,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:28:48,572 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:28:48,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:28:48,572 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 -> NOT_INCREMENTALLY [2020-07-21 12:28:48,856 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:28:48,869 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:28:48,873 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:28:48,874 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:28:48,875 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:28:48,875 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 12:28:48,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f1c5884/42a591a6307c44cf874f0d6cb13c081f/FLAG68c470f46 [2020-07-21 12:28:49,663 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:28:49,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 12:28:49,704 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f1c5884/42a591a6307c44cf874f0d6cb13c081f/FLAG68c470f46 [2020-07-21 12:28:49,807 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91f1c5884/42a591a6307c44cf874f0d6cb13c081f [2020-07-21 12:28:49,818 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:28:49,821 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:28:49,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:28:49,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:28:49,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:28:49,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:28:49" (1/1) ... [2020-07-21 12:28:49,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bd8c312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:28:49, skipping insertion in model container [2020-07-21 12:28:49,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:28:49" (1/1) ... [2020-07-21 12:28:49,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:28:50,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:28:51,859 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:28:51,882 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:28:53,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:28:53,100 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:28:53,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:28:53 WrapperNode [2020-07-21 12:28:53,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:28:53,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:28:53,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:28:53,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:28:53,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:28:53" (1/1) ... [2020-07-21 12:28:53,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:28:53" (1/1) ... [2020-07-21 12:28:53,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:28:53" (1/1) ... [2020-07-21 12:28:53,184 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:28:53" (1/1) ... [2020-07-21 12:28:53,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:28:53" (1/1) ... [2020-07-21 12:28:53,329 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:28:53" (1/1) ... [2020-07-21 12:28:53,342 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:28:53" (1/1) ... [2020-07-21 12:28:53,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:28:53,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:28:53,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:28:53,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:28:53,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:28:53" (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 12:28:53,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:28:53,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:28:53,443 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:28:53,443 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:28:53,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:28:53,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:28:53,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 12:28:53,444 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:28:53,445 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:28:53,445 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:28:53,445 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:28:53,445 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:28:53,446 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:28:53,446 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:28:53,446 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:28:53,446 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:28:53,447 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:28:53,447 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 12:28:53,447 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:28:53,447 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:28:53,448 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:28:53,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:28:53,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:28:57,641 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:28:57,641 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:28:57,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:28:57 BoogieIcfgContainer [2020-07-21 12:28:57,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:28:57,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:28:57,655 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:28:57,658 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:28:57,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:28:49" (1/3) ... [2020-07-21 12:28:57,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@119e1e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:28:57, skipping insertion in model container [2020-07-21 12:28:57,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:28:53" (2/3) ... [2020-07-21 12:28:57,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@119e1e58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:28:57, skipping insertion in model container [2020-07-21 12:28:57,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:28:57" (3/3) ... [2020-07-21 12:28:57,661 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 12:28:57,672 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:28:57,681 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 12:28:57,696 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 12:28:57,724 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:28:57,724 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:28:57,724 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:28:57,724 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:28:57,724 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:28:57,725 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:28:57,725 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:28:57,725 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:28:57,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-07-21 12:28:57,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 12:28:57,801 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:28:57,803 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] [2020-07-21 12:28:57,803 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:28:57,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:28:57,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-07-21 12:28:57,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:28:57,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996266889] [2020-07-21 12:28:57,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:28:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:28:58,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 3066 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:28:58,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:28:59,069 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 12:28:59,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:28:59,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996266889] [2020-07-21 12:28:59,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:28:59,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:28:59,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092798476] [2020-07-21 12:28:59,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:28:59,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:28:59,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:28:59,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:28:59,097 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 4 states. [2020-07-21 12:28:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:28:59,593 INFO L93 Difference]: Finished difference Result 4363 states and 7870 transitions. [2020-07-21 12:28:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:28:59,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-21 12:28:59,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:28:59,643 INFO L225 Difference]: With dead ends: 4363 [2020-07-21 12:28:59,643 INFO L226 Difference]: Without dead ends: 2926 [2020-07-21 12:28:59,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:28:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2020-07-21 12:28:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2865. [2020-07-21 12:28:59,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-07-21 12:28:59,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4697 transitions. [2020-07-21 12:28:59,913 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4697 transitions. Word has length 493 [2020-07-21 12:28:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:28:59,915 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4697 transitions. [2020-07-21 12:28:59,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:28:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4697 transitions. [2020-07-21 12:28:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 12:28:59,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:28:59,930 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 12:29:00,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:00,145 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:00,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1441262864, now seen corresponding path program 1 times [2020-07-21 12:29:00,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:00,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674793665] [2020-07-21 12:29:00,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:00,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 3069 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:00,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:01,030 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 12:29:01,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:01,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674793665] [2020-07-21 12:29:01,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:01,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:01,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25741531] [2020-07-21 12:29:01,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:01,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:01,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:01,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:01,036 INFO L87 Difference]: Start difference. First operand 2865 states and 4697 transitions. Second operand 3 states. [2020-07-21 12:29:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:01,347 INFO L93 Difference]: Finished difference Result 8273 states and 13509 transitions. [2020-07-21 12:29:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:01,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 12:29:01,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:01,381 INFO L225 Difference]: With dead ends: 8273 [2020-07-21 12:29:01,382 INFO L226 Difference]: Without dead ends: 5573 [2020-07-21 12:29:01,392 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 12:29:01,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5573 states. [2020-07-21 12:29:01,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5573 to 5512. [2020-07-21 12:29:01,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5512 states. [2020-07-21 12:29:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5512 states to 5512 states and 8993 transitions. [2020-07-21 12:29:01,637 INFO L78 Accepts]: Start accepts. Automaton has 5512 states and 8993 transitions. Word has length 495 [2020-07-21 12:29:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:01,640 INFO L479 AbstractCegarLoop]: Abstraction has 5512 states and 8993 transitions. [2020-07-21 12:29:01,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:01,640 INFO L276 IsEmpty]: Start isEmpty. Operand 5512 states and 8993 transitions. [2020-07-21 12:29:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 12:29:01,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:01,671 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 12:29:01,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:01,880 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:01,882 INFO L82 PathProgramCache]: Analyzing trace with hash -894042864, now seen corresponding path program 1 times [2020-07-21 12:29:01,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:01,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887424570] [2020-07-21 12:29:01,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:02,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:02,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:02,617 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 12:29:02,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:02,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887424570] [2020-07-21 12:29:02,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:02,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:02,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561271644] [2020-07-21 12:29:02,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:02,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:02,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:02,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:02,621 INFO L87 Difference]: Start difference. First operand 5512 states and 8993 transitions. Second operand 3 states. [2020-07-21 12:29:02,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:02,960 INFO L93 Difference]: Finished difference Result 15764 states and 25565 transitions. [2020-07-21 12:29:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:02,961 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 12:29:02,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:03,015 INFO L225 Difference]: With dead ends: 15764 [2020-07-21 12:29:03,015 INFO L226 Difference]: Without dead ends: 10641 [2020-07-21 12:29:03,030 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 12:29:03,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10641 states. [2020-07-21 12:29:03,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10641 to 5564. [2020-07-21 12:29:03,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5564 states. [2020-07-21 12:29:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5564 states to 5564 states and 9073 transitions. [2020-07-21 12:29:03,324 INFO L78 Accepts]: Start accepts. Automaton has 5564 states and 9073 transitions. Word has length 496 [2020-07-21 12:29:03,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:03,325 INFO L479 AbstractCegarLoop]: Abstraction has 5564 states and 9073 transitions. [2020-07-21 12:29:03,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:03,325 INFO L276 IsEmpty]: Start isEmpty. Operand 5564 states and 9073 transitions. [2020-07-21 12:29:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 12:29:03,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:03,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:03,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:03,564 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:03,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:03,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1888108171, now seen corresponding path program 1 times [2020-07-21 12:29:03,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:03,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024504313] [2020-07-21 12:29:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:04,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 3072 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:04,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:04,362 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 12:29:04,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:04,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024504313] [2020-07-21 12:29:04,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:04,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:04,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95931522] [2020-07-21 12:29:04,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:04,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:04,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:04,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:04,366 INFO L87 Difference]: Start difference. First operand 5564 states and 9073 transitions. Second operand 3 states. [2020-07-21 12:29:04,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:04,754 INFO L93 Difference]: Finished difference Result 16256 states and 26438 transitions. [2020-07-21 12:29:04,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:04,755 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-21 12:29:04,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:04,815 INFO L225 Difference]: With dead ends: 16256 [2020-07-21 12:29:04,815 INFO L226 Difference]: Without dead ends: 10923 [2020-07-21 12:29:04,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10923 states. [2020-07-21 12:29:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10923 to 10862. [2020-07-21 12:29:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10862 states. [2020-07-21 12:29:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10862 states to 10862 states and 17636 transitions. [2020-07-21 12:29:05,208 INFO L78 Accepts]: Start accepts. Automaton has 10862 states and 17636 transitions. Word has length 497 [2020-07-21 12:29:05,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:05,209 INFO L479 AbstractCegarLoop]: Abstraction has 10862 states and 17636 transitions. [2020-07-21 12:29:05,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:05,210 INFO L276 IsEmpty]: Start isEmpty. Operand 10862 states and 17636 transitions. [2020-07-21 12:29:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 12:29:05,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:05,249 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:05,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:05,462 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:05,463 INFO L82 PathProgramCache]: Analyzing trace with hash 518974352, now seen corresponding path program 1 times [2020-07-21 12:29:05,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:05,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654166458] [2020-07-21 12:29:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:06,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:06,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:06,146 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 12:29:06,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:06,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654166458] [2020-07-21 12:29:06,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:06,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:06,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675722652] [2020-07-21 12:29:06,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:06,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:06,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:06,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:06,149 INFO L87 Difference]: Start difference. First operand 10862 states and 17636 transitions. Second operand 3 states. [2020-07-21 12:29:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:07,293 INFO L93 Difference]: Finished difference Result 31126 states and 50264 transitions. [2020-07-21 12:29:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:07,293 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-21 12:29:07,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:07,339 INFO L225 Difference]: With dead ends: 31126 [2020-07-21 12:29:07,339 INFO L226 Difference]: Without dead ends: 21001 [2020-07-21 12:29:07,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:07,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21001 states. [2020-07-21 12:29:07,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21001 to 11020. [2020-07-21 12:29:07,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11020 states. [2020-07-21 12:29:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11020 states to 11020 states and 17874 transitions. [2020-07-21 12:29:07,803 INFO L78 Accepts]: Start accepts. Automaton has 11020 states and 17874 transitions. Word has length 497 [2020-07-21 12:29:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:07,807 INFO L479 AbstractCegarLoop]: Abstraction has 11020 states and 17874 transitions. [2020-07-21 12:29:07,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:07,808 INFO L276 IsEmpty]: Start isEmpty. Operand 11020 states and 17874 transitions. [2020-07-21 12:29:07,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 12:29:07,834 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:07,835 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:08,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:08,050 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:08,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1268982465, now seen corresponding path program 1 times [2020-07-21 12:29:08,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:08,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551731059] [2020-07-21 12:29:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:08,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:08,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:08,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:08,850 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 12:29:08,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:08,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551731059] [2020-07-21 12:29:08,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:08,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:08,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628897026] [2020-07-21 12:29:08,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:08,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:08,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:08,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:08,854 INFO L87 Difference]: Start difference. First operand 11020 states and 17874 transitions. Second operand 3 states. [2020-07-21 12:29:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:09,544 INFO L93 Difference]: Finished difference Result 31340 states and 50543 transitions. [2020-07-21 12:29:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:09,545 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 12:29:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:09,592 INFO L225 Difference]: With dead ends: 31340 [2020-07-21 12:29:09,593 INFO L226 Difference]: Without dead ends: 21191 [2020-07-21 12:29:09,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:09,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21191 states. [2020-07-21 12:29:10,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21191 to 11210. [2020-07-21 12:29:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11210 states. [2020-07-21 12:29:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11210 states to 11210 states and 18116 transitions. [2020-07-21 12:29:10,155 INFO L78 Accepts]: Start accepts. Automaton has 11210 states and 18116 transitions. Word has length 498 [2020-07-21 12:29:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:10,156 INFO L479 AbstractCegarLoop]: Abstraction has 11210 states and 18116 transitions. [2020-07-21 12:29:10,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:10,156 INFO L276 IsEmpty]: Start isEmpty. Operand 11210 states and 18116 transitions. [2020-07-21 12:29:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 12:29:10,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:10,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:10,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:10,395 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:10,396 INFO L82 PathProgramCache]: Analyzing trace with hash -631221630, now seen corresponding path program 1 times [2020-07-21 12:29:10,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:10,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086263700] [2020-07-21 12:29:10,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:11,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 3085 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:29:11,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:11,633 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 12:29:11,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:11,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086263700] [2020-07-21 12:29:11,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:11,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:29:11,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287730348] [2020-07-21 12:29:11,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:29:11,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:11,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:29:11,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:29:11,637 INFO L87 Difference]: Start difference. First operand 11210 states and 18116 transitions. Second operand 8 states. [2020-07-21 12:29:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:14,348 INFO L93 Difference]: Finished difference Result 23720 states and 37804 transitions. [2020-07-21 12:29:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:29:14,348 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 499 [2020-07-21 12:29:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:14,383 INFO L225 Difference]: With dead ends: 23720 [2020-07-21 12:29:14,383 INFO L226 Difference]: Without dead ends: 16883 [2020-07-21 12:29:14,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:29:14,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16883 states. [2020-07-21 12:29:14,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16883 to 11890. [2020-07-21 12:29:14,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11890 states. [2020-07-21 12:29:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11890 states to 11890 states and 18992 transitions. [2020-07-21 12:29:14,913 INFO L78 Accepts]: Start accepts. Automaton has 11890 states and 18992 transitions. Word has length 499 [2020-07-21 12:29:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:14,914 INFO L479 AbstractCegarLoop]: Abstraction has 11890 states and 18992 transitions. [2020-07-21 12:29:14,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:29:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 11890 states and 18992 transitions. [2020-07-21 12:29:14,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 12:29:14,938 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:14,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:15,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:15,152 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:15,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:15,153 INFO L82 PathProgramCache]: Analyzing trace with hash -10319338, now seen corresponding path program 1 times [2020-07-21 12:29:15,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:15,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039992902] [2020-07-21 12:29:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:15,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 3081 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:15,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:15,941 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 12:29:15,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:15,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039992902] [2020-07-21 12:29:15,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:15,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:15,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741793102] [2020-07-21 12:29:15,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:15,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:15,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:15,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:15,945 INFO L87 Difference]: Start difference. First operand 11890 states and 18992 transitions. Second operand 3 states. [2020-07-21 12:29:16,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:16,471 INFO L93 Difference]: Finished difference Result 21244 states and 33671 transitions. [2020-07-21 12:29:16,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:16,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 12:29:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:16,497 INFO L225 Difference]: With dead ends: 21244 [2020-07-21 12:29:16,498 INFO L226 Difference]: Without dead ends: 14595 [2020-07-21 12:29:16,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:16,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14595 states. [2020-07-21 12:29:17,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14595 to 13306. [2020-07-21 12:29:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13306 states. [2020-07-21 12:29:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13306 states to 13306 states and 21308 transitions. [2020-07-21 12:29:17,311 INFO L78 Accepts]: Start accepts. Automaton has 13306 states and 21308 transitions. Word has length 499 [2020-07-21 12:29:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:17,312 INFO L479 AbstractCegarLoop]: Abstraction has 13306 states and 21308 transitions. [2020-07-21 12:29:17,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 13306 states and 21308 transitions. [2020-07-21 12:29:17,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 12:29:17,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:17,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:17,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:17,548 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:17,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:17,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1794357690, now seen corresponding path program 1 times [2020-07-21 12:29:17,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:17,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741191585] [2020-07-21 12:29:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:18,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:18,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:18,291 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 12:29:18,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:18,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741191585] [2020-07-21 12:29:18,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:18,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:18,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60179997] [2020-07-21 12:29:18,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:18,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:18,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:18,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:18,294 INFO L87 Difference]: Start difference. First operand 13306 states and 21308 transitions. Second operand 3 states. [2020-07-21 12:29:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:19,378 INFO L93 Difference]: Finished difference Result 39061 states and 62406 transitions. [2020-07-21 12:29:19,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:19,379 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 12:29:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:19,416 INFO L225 Difference]: With dead ends: 39061 [2020-07-21 12:29:19,416 INFO L226 Difference]: Without dead ends: 26129 [2020-07-21 12:29:19,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:19,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26129 states. [2020-07-21 12:29:20,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26129 to 26068. [2020-07-21 12:29:20,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26068 states. [2020-07-21 12:29:20,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26068 states to 26068 states and 41531 transitions. [2020-07-21 12:29:20,374 INFO L78 Accepts]: Start accepts. Automaton has 26068 states and 41531 transitions. Word has length 499 [2020-07-21 12:29:20,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:20,375 INFO L479 AbstractCegarLoop]: Abstraction has 26068 states and 41531 transitions. [2020-07-21 12:29:20,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:20,375 INFO L276 IsEmpty]: Start isEmpty. Operand 26068 states and 41531 transitions. [2020-07-21 12:29:20,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 12:29:20,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:20,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:20,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:20,596 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:20,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:20,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1293501309, now seen corresponding path program 1 times [2020-07-21 12:29:20,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:20,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462213955] [2020-07-21 12:29:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:21,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:21,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 3076 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:29:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:21,877 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 12:29:21,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:21,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462213955] [2020-07-21 12:29:21,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:21,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:29:21,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225678831] [2020-07-21 12:29:21,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:29:21,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:21,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:29:21,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:29:21,879 INFO L87 Difference]: Start difference. First operand 26068 states and 41531 transitions. Second operand 4 states. [2020-07-21 12:29:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:23,530 INFO L93 Difference]: Finished difference Result 70556 states and 111502 transitions. [2020-07-21 12:29:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:29:23,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-07-21 12:29:23,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:23,598 INFO L225 Difference]: With dead ends: 70556 [2020-07-21 12:29:23,598 INFO L226 Difference]: Without dead ends: 48891 [2020-07-21 12:29:23,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:29:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48891 states. [2020-07-21 12:29:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48891 to 28756. [2020-07-21 12:29:24,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28756 states. [2020-07-21 12:29:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28756 states to 28756 states and 46220 transitions. [2020-07-21 12:29:25,036 INFO L78 Accepts]: Start accepts. Automaton has 28756 states and 46220 transitions. Word has length 499 [2020-07-21 12:29:25,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:25,036 INFO L479 AbstractCegarLoop]: Abstraction has 28756 states and 46220 transitions. [2020-07-21 12:29:25,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:29:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 28756 states and 46220 transitions. [2020-07-21 12:29:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 12:29:25,062 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:25,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:25,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:25,276 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:25,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:25,277 INFO L82 PathProgramCache]: Analyzing trace with hash -268212577, now seen corresponding path program 1 times [2020-07-21 12:29:25,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:25,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108561779] [2020-07-21 12:29:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:25,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 3088 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:29:25,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:26,143 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 12:29:26,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:26,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108561779] [2020-07-21 12:29:26,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:26,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:29:26,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536759145] [2020-07-21 12:29:26,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:29:26,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:26,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:29:26,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:29:26,146 INFO L87 Difference]: Start difference. First operand 28756 states and 46220 transitions. Second operand 8 states. [2020-07-21 12:29:30,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:30,466 INFO L93 Difference]: Finished difference Result 60627 states and 96988 transitions. [2020-07-21 12:29:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:29:30,466 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 501 [2020-07-21 12:29:30,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:30,531 INFO L225 Difference]: With dead ends: 60627 [2020-07-21 12:29:30,532 INFO L226 Difference]: Without dead ends: 52802 [2020-07-21 12:29:30,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:29:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52802 states. [2020-07-21 12:29:32,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52802 to 34240. [2020-07-21 12:29:32,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34240 states. [2020-07-21 12:29:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34240 states to 34240 states and 54764 transitions. [2020-07-21 12:29:33,015 INFO L78 Accepts]: Start accepts. Automaton has 34240 states and 54764 transitions. Word has length 501 [2020-07-21 12:29:33,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:33,016 INFO L479 AbstractCegarLoop]: Abstraction has 34240 states and 54764 transitions. [2020-07-21 12:29:33,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:29:33,016 INFO L276 IsEmpty]: Start isEmpty. Operand 34240 states and 54764 transitions. [2020-07-21 12:29:33,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 12:29:33,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:33,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:33,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:33,262 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:33,263 INFO L82 PathProgramCache]: Analyzing trace with hash -200437430, now seen corresponding path program 1 times [2020-07-21 12:29:33,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:33,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313617100] [2020-07-21 12:29:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:33,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 3084 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:33,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:29:34,126 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:34,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313617100] [2020-07-21 12:29:34,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:34,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:34,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79928175] [2020-07-21 12:29:34,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:34,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:34,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:34,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:34,128 INFO L87 Difference]: Start difference. First operand 34240 states and 54764 transitions. Second operand 3 states. [2020-07-21 12:29:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:35,971 INFO L93 Difference]: Finished difference Result 66506 states and 105367 transitions. [2020-07-21 12:29:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:35,972 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-21 12:29:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:36,036 INFO L225 Difference]: With dead ends: 66506 [2020-07-21 12:29:36,036 INFO L226 Difference]: Without dead ends: 43989 [2020-07-21 12:29:36,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:36,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43989 states. [2020-07-21 12:29:38,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43989 to 39360. [2020-07-21 12:29:38,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39360 states. [2020-07-21 12:29:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39360 states to 39360 states and 63148 transitions. [2020-07-21 12:29:38,153 INFO L78 Accepts]: Start accepts. Automaton has 39360 states and 63148 transitions. Word has length 501 [2020-07-21 12:29:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:38,154 INFO L479 AbstractCegarLoop]: Abstraction has 39360 states and 63148 transitions. [2020-07-21 12:29:38,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 39360 states and 63148 transitions. [2020-07-21 12:29:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 12:29:38,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:38,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:38,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:38,381 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:38,382 INFO L82 PathProgramCache]: Analyzing trace with hash -956988575, now seen corresponding path program 1 times [2020-07-21 12:29:38,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:38,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137995804] [2020-07-21 12:29:38,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:38,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 3086 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:29:38,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:39,143 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 12:29:39,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:39,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137995804] [2020-07-21 12:29:39,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:39,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:29:39,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210987386] [2020-07-21 12:29:39,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:29:39,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:29:39,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:29:39,146 INFO L87 Difference]: Start difference. First operand 39360 states and 63148 transitions. Second operand 5 states. [2020-07-21 12:29:41,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:41,733 INFO L93 Difference]: Finished difference Result 65901 states and 104875 transitions. [2020-07-21 12:29:41,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:29:41,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 502 [2020-07-21 12:29:41,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:41,787 INFO L225 Difference]: With dead ends: 65901 [2020-07-21 12:29:41,788 INFO L226 Difference]: Without dead ends: 39360 [2020-07-21 12:29:41,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:29:41,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39360 states. [2020-07-21 12:29:44,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39360 to 39360. [2020-07-21 12:29:44,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39360 states. [2020-07-21 12:29:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39360 states to 39360 states and 62652 transitions. [2020-07-21 12:29:44,950 INFO L78 Accepts]: Start accepts. Automaton has 39360 states and 62652 transitions. Word has length 502 [2020-07-21 12:29:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:44,950 INFO L479 AbstractCegarLoop]: Abstraction has 39360 states and 62652 transitions. [2020-07-21 12:29:44,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:29:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 39360 states and 62652 transitions. [2020-07-21 12:29:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 12:29:44,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:44,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:45,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:45,185 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:45,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:45,186 INFO L82 PathProgramCache]: Analyzing trace with hash -33153018, now seen corresponding path program 1 times [2020-07-21 12:29:45,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:45,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074131472] [2020-07-21 12:29:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:45,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:45,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 3087 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:29:45,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:45,950 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 12:29:45,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:45,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074131472] [2020-07-21 12:29:45,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:45,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:29:45,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673983290] [2020-07-21 12:29:45,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:29:45,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:45,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:29:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:29:45,952 INFO L87 Difference]: Start difference. First operand 39360 states and 62652 transitions. Second operand 4 states. [2020-07-21 12:29:49,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:49,827 INFO L93 Difference]: Finished difference Result 117223 states and 186655 transitions. [2020-07-21 12:29:49,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:29:49,828 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-21 12:29:49,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:49,921 INFO L225 Difference]: With dead ends: 117223 [2020-07-21 12:29:49,921 INFO L226 Difference]: Without dead ends: 77878 [2020-07-21 12:29:50,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:29:50,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77878 states. [2020-07-21 12:29:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77878 to 77833. [2020-07-21 12:29:55,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77833 states. [2020-07-21 12:29:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77833 states to 77833 states and 123531 transitions. [2020-07-21 12:29:55,885 INFO L78 Accepts]: Start accepts. Automaton has 77833 states and 123531 transitions. Word has length 502 [2020-07-21 12:29:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:55,886 INFO L479 AbstractCegarLoop]: Abstraction has 77833 states and 123531 transitions. [2020-07-21 12:29:55,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:29:55,886 INFO L276 IsEmpty]: Start isEmpty. Operand 77833 states and 123531 transitions. [2020-07-21 12:29:55,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 12:29:55,935 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:55,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:56,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:56,136 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:56,137 INFO L82 PathProgramCache]: Analyzing trace with hash 510332263, now seen corresponding path program 1 times [2020-07-21 12:29:56,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:56,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394044784] [2020-07-21 12:29:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:29:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:56,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 3090 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:56,832 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 12:29:56,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:56,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394044784] [2020-07-21 12:29:56,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:56,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:56,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786659010] [2020-07-21 12:29:56,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:56,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:56,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:56,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:56,835 INFO L87 Difference]: Start difference. First operand 77833 states and 123531 transitions. Second operand 3 states. [2020-07-21 12:30:04,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:30:04,671 INFO L93 Difference]: Finished difference Result 230301 states and 365180 transitions. [2020-07-21 12:30:04,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:30:04,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-21 12:30:04,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:30:04,841 INFO L225 Difference]: With dead ends: 230301 [2020-07-21 12:30:04,841 INFO L226 Difference]: Without dead ends: 153921 [2020-07-21 12:30:04,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:30:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153921 states. [2020-07-21 12:30:15,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153921 to 153878. [2020-07-21 12:30:15,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153878 states. [2020-07-21 12:30:15,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153878 states to 153878 states and 243385 transitions. [2020-07-21 12:30:15,653 INFO L78 Accepts]: Start accepts. Automaton has 153878 states and 243385 transitions. Word has length 504 [2020-07-21 12:30:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:15,654 INFO L479 AbstractCegarLoop]: Abstraction has 153878 states and 243385 transitions. [2020-07-21 12:30:15,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:30:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand 153878 states and 243385 transitions. [2020-07-21 12:30:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-21 12:30:15,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:15,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:30:15,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:15,959 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:15,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:15,960 INFO L82 PathProgramCache]: Analyzing trace with hash 2015355056, now seen corresponding path program 1 times [2020-07-21 12:30:15,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:15,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143669557] [2020-07-21 12:30:15,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:30:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:16,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 3092 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:30:16,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:16,585 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 12:30:16,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:16,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143669557] [2020-07-21 12:30:16,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:16,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:30:16,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963836490] [2020-07-21 12:30:16,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:30:16,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:16,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:30:16,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:30:16,588 INFO L87 Difference]: Start difference. First operand 153878 states and 243385 transitions. Second operand 3 states. [2020-07-21 12:30:34,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:30:34,967 INFO L93 Difference]: Finished difference Result 460098 states and 727365 transitions. [2020-07-21 12:30:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:30:34,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 505 [2020-07-21 12:30:34,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:30:35,335 INFO L225 Difference]: With dead ends: 460098 [2020-07-21 12:30:35,335 INFO L226 Difference]: Without dead ends: 306251 [2020-07-21 12:30:35,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:30:35,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306251 states. [2020-07-21 12:30:49,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306251 to 153904. [2020-07-21 12:30:49,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153904 states. [2020-07-21 12:30:49,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153904 states to 153904 states and 243423 transitions. [2020-07-21 12:30:49,746 INFO L78 Accepts]: Start accepts. Automaton has 153904 states and 243423 transitions. Word has length 505 [2020-07-21 12:30:49,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:49,747 INFO L479 AbstractCegarLoop]: Abstraction has 153904 states and 243423 transitions. [2020-07-21 12:30:49,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:30:49,747 INFO L276 IsEmpty]: Start isEmpty. Operand 153904 states and 243423 transitions. [2020-07-21 12:30:49,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 12:30:49,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:49,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:30:50,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:50,036 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:50,037 INFO L82 PathProgramCache]: Analyzing trace with hash 19081858, now seen corresponding path program 1 times [2020-07-21 12:30:50,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:50,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744069234] [2020-07-21 12:30:50,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:30:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:50,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 3093 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:30:50,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:50,834 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 12:30:50,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:50,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744069234] [2020-07-21 12:30:50,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:50,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:30:50,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497652591] [2020-07-21 12:30:50,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:30:50,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:50,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:30:50,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:30:50,837 INFO L87 Difference]: Start difference. First operand 153904 states and 243423 transitions. Second operand 3 states. [2020-07-21 12:31:11,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:31:11,806 INFO L93 Difference]: Finished difference Result 456543 states and 721426 transitions. [2020-07-21 12:31:11,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:31:11,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 506 [2020-07-21 12:31:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:31:12,170 INFO L225 Difference]: With dead ends: 456543 [2020-07-21 12:31:12,171 INFO L226 Difference]: Without dead ends: 304267 [2020-07-21 12:31:12,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:31:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304267 states. [2020-07-21 12:31:36,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304267 to 304226. [2020-07-21 12:31:36,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304226 states. [2020-07-21 12:31:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304226 states to 304226 states and 479139 transitions. [2020-07-21 12:31:36,475 INFO L78 Accepts]: Start accepts. Automaton has 304226 states and 479139 transitions. Word has length 506 [2020-07-21 12:31:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:31:36,476 INFO L479 AbstractCegarLoop]: Abstraction has 304226 states and 479139 transitions. [2020-07-21 12:31:36,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:31:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand 304226 states and 479139 transitions. [2020-07-21 12:31:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-21 12:31:36,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:31:36,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:31:36,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:31:36,899 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:31:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:31:36,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2059982841, now seen corresponding path program 1 times [2020-07-21 12:31:36,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:31:36,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581314530] [2020-07-21 12:31:36,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:31:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:31:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 3095 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:31:37,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:31:38,020 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 12:31:38,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:31:38,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581314530] [2020-07-21 12:31:38,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:31:38,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:31:38,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560977282] [2020-07-21 12:31:38,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:31:38,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:31:38,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:31:38,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:31:38,022 INFO L87 Difference]: Start difference. First operand 304226 states and 479139 transitions. Second operand 3 states. [2020-07-21 12:32:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:19,396 INFO L93 Difference]: Finished difference Result 912540 states and 1437186 transitions. [2020-07-21 12:32:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:32:19,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 506 [2020-07-21 12:32:19,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:20,256 INFO L225 Difference]: With dead ends: 912540 [2020-07-21 12:32:20,257 INFO L226 Difference]: Without dead ends: 608366 [2020-07-21 12:32:20,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:32:20,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608366 states. [2020-07-21 12:32:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608366 to 304288. [2020-07-21 12:32:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304288 states. [2020-07-21 12:32:49,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304288 states to 304288 states and 479232 transitions. [2020-07-21 12:32:49,959 INFO L78 Accepts]: Start accepts. Automaton has 304288 states and 479232 transitions. Word has length 506 [2020-07-21 12:32:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:32:49,959 INFO L479 AbstractCegarLoop]: Abstraction has 304288 states and 479232 transitions. [2020-07-21 12:32:49,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:32:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 304288 states and 479232 transitions. [2020-07-21 12:32:50,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 12:32:50,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:32:50,143 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:32:50,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:50,343 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:32:50,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:32:50,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1038939265, now seen corresponding path program 1 times [2020-07-21 12:32:50,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:32:50,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388945238] [2020-07-21 12:32:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:32:50,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:32:50,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:32:51,631 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 12:32:51,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:32:51,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388945238] [2020-07-21 12:32:51,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:32:51,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:32:51,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29936351] [2020-07-21 12:32:51,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:32:51,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:32:51,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:32:51,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:32:51,634 INFO L87 Difference]: Start difference. First operand 304288 states and 479232 transitions. Second operand 3 states. [2020-07-21 12:33:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:33:35,825 INFO L93 Difference]: Finished difference Result 912647 states and 1437332 transitions. [2020-07-21 12:33:35,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:33:35,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-21 12:33:35,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:33:36,678 INFO L225 Difference]: With dead ends: 912647 [2020-07-21 12:33:36,678 INFO L226 Difference]: Without dead ends: 608472 [2020-07-21 12:33:36,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 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 12:33:37,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608472 states. [2020-07-21 12:34:08,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608472 to 304394. [2020-07-21 12:34:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304394 states. [2020-07-21 12:34:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304394 states to 304394 states and 479371 transitions. [2020-07-21 12:34:15,913 INFO L78 Accepts]: Start accepts. Automaton has 304394 states and 479371 transitions. Word has length 507 [2020-07-21 12:34:15,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:34:15,914 INFO L479 AbstractCegarLoop]: Abstraction has 304394 states and 479371 transitions. [2020-07-21 12:34:15,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:34:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 304394 states and 479371 transitions. [2020-07-21 12:34:16,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 12:34:16,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:34:16,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:34:16,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:34:16,274 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:34:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:34:16,274 INFO L82 PathProgramCache]: Analyzing trace with hash 757080527, now seen corresponding path program 1 times [2020-07-21 12:34:16,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:34:16,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797790330] [2020-07-21 12:34:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:34:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:34:16,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 3114 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:34:16,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:34:17,393 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 12:34:17,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:34:17,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797790330] [2020-07-21 12:34:17,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:34:17,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:34:17,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795637681] [2020-07-21 12:34:17,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:34:17,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:34:17,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:34:17,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:34:17,399 INFO L87 Difference]: Start difference. First operand 304394 states and 479371 transitions. Second operand 8 states. [2020-07-21 12:35:31,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:35:31,012 INFO L93 Difference]: Finished difference Result 939970 states and 1467237 transitions. [2020-07-21 12:35:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:35:31,013 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 508 [2020-07-21 12:35:31,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:35:32,574 INFO L225 Difference]: With dead ends: 939970 [2020-07-21 12:35:32,575 INFO L226 Difference]: Without dead ends: 730388 [2020-07-21 12:35:32,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:35:33,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730388 states. [2020-07-21 12:36:22,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730388 to 427498. [2020-07-21 12:36:22,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427498 states. [2020-07-21 12:36:22,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427498 states to 427498 states and 662331 transitions. [2020-07-21 12:36:22,819 INFO L78 Accepts]: Start accepts. Automaton has 427498 states and 662331 transitions. Word has length 508 [2020-07-21 12:36:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:36:22,820 INFO L479 AbstractCegarLoop]: Abstraction has 427498 states and 662331 transitions. [2020-07-21 12:36:22,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:36:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 427498 states and 662331 transitions. [2020-07-21 12:36:23,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 12:36:23,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:36:23,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:36:23,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:36:23,264 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:36:23,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:36:23,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1509536725, now seen corresponding path program 1 times [2020-07-21 12:36:23,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:36:23,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632666834] [2020-07-21 12:36:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:36:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:36:23,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 3102 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:36:23,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:36:24,641 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 12:36:24,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:36:24,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632666834] [2020-07-21 12:36:24,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:36:24,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:36:24,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659628815] [2020-07-21 12:36:24,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:36:24,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:36:24,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:36:24,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:36:24,644 INFO L87 Difference]: Start difference. First operand 427498 states and 662331 transitions. Second operand 3 states. [2020-07-21 12:37:23,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:37:23,679 INFO L93 Difference]: Finished difference Result 923578 states and 1421752 transitions. [2020-07-21 12:37:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:37:23,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 508 [2020-07-21 12:37:23,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:37:24,499 INFO L225 Difference]: With dead ends: 923578 [2020-07-21 12:37:24,500 INFO L226 Difference]: Without dead ends: 585132 [2020-07-21 12:37:24,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 506 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 12:37:25,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585132 states. [2020-07-21 12:38:20,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585132 to 525930. [2020-07-21 12:38:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525930 states. [2020-07-21 12:38:21,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525930 states to 525930 states and 821339 transitions. [2020-07-21 12:38:21,813 INFO L78 Accepts]: Start accepts. Automaton has 525930 states and 821339 transitions. Word has length 508 [2020-07-21 12:38:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:38:21,813 INFO L479 AbstractCegarLoop]: Abstraction has 525930 states and 821339 transitions. [2020-07-21 12:38:21,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:38:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 525930 states and 821339 transitions. [2020-07-21 12:38:22,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-21 12:38:22,037 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:38:22,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:38:22,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:38:22,238 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:38:22,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:38:22,239 INFO L82 PathProgramCache]: Analyzing trace with hash 278314941, now seen corresponding path program 1 times [2020-07-21 12:38:22,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:38:22,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183953676] [2020-07-21 12:38:22,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:38:23,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:38:23,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:38:23,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:38:23,628 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 12:38:23,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:38:23,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183953676] [2020-07-21 12:38:23,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:38:23,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:38:23,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475701808] [2020-07-21 12:38:23,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:38:23,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:38:23,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:38:23,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:38:23,630 INFO L87 Difference]: Start difference. First operand 525930 states and 821339 transitions. Second operand 3 states. [2020-07-21 12:40:13,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:40:13,045 INFO L93 Difference]: Finished difference Result 1553834 states and 2427766 transitions. [2020-07-21 12:40:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:40:13,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 508 [2020-07-21 12:40:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:40:14,678 INFO L225 Difference]: With dead ends: 1553834 [2020-07-21 12:40:14,678 INFO L226 Difference]: Without dead ends: 1035750 [2020-07-21 12:40:15,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 506 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 12:40:15,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035750 states.