/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 [2020-07-20 12:39:50,403 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:39:50,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:39:50,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:39:50,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:39:50,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:39:50,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:39:50,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:39:50,444 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:39:50,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:39:50,448 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:39:50,449 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:39:50,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:39:50,453 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:39:50,455 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:39:50,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:39:50,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:39:50,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:39:50,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:39:50,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:39:50,471 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:39:50,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:39:50,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:39:50,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:39:50,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:39:50,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:39:50,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:39:50,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:39:50,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 12:39:50,528 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:39:50,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:39:50,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:39:50,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:39:50,534 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:39:50,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:39:50,534 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:39:50,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:39:50,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:39:50,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:39:50,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:39:50,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:39:50,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:39:50,538 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:39:50,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:39:50,538 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:39:50,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:39:50,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:39:50,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:39:50,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:39:50,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:39:50,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:39:50,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:39:50,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:39:50,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:39:50,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:39:50,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:39:50,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:39:50,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:39:50,542 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 [2020-07-20 12:39:50,872 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:39:50,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:39:50,889 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:39:50,891 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:39:50,891 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:39:50,892 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 12:39:50,954 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db1b39285/c2f2b4ca8f6045f8a5be6a627e221cec/FLAGb7e9b5404 [2020-07-20 12:39:51,659 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:39:51,659 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 12:39:51,685 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db1b39285/c2f2b4ca8f6045f8a5be6a627e221cec/FLAGb7e9b5404 [2020-07-20 12:39:51,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db1b39285/c2f2b4ca8f6045f8a5be6a627e221cec [2020-07-20 12:39:51,822 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:39:51,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:39:51,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:39:51,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:39:51,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:39:51,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:39:51" (1/1) ... [2020-07-20 12:39:51,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3474592d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:39:51, skipping insertion in model container [2020-07-20 12:39:51,833 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:39:51" (1/1) ... [2020-07-20 12:39:51,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:39:52,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:39:53,630 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:39:53,645 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:39:55,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:39:55,569 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:39:55,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:39:55 WrapperNode [2020-07-20 12:39:55,570 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:39:55,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:39:55,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:39:55,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:39:55,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:39:55" (1/1) ... [2020-07-20 12:39:55,588 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:39:55" (1/1) ... [2020-07-20 12:39:55,641 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:39:55" (1/1) ... [2020-07-20 12:39:55,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:39:55" (1/1) ... [2020-07-20 12:39:55,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:39:55" (1/1) ... [2020-07-20 12:39:55,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:39:55" (1/1) ... [2020-07-20 12:39:55,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:39:55" (1/1) ... [2020-07-20 12:39:55,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:39:55,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:39:55,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:39:55,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:39:55,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:39:55" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:39:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:39:55,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:39:55,906 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:39:55,906 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:39:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:39:55,907 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 12:39:55,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 12:39:55,908 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 12:39:55,909 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 12:39:55,909 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:39:55,909 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:39:55,910 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 12:39:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 12:39:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 12:39:55,911 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 12:39:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 12:39:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 12:39:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 12:39:55,913 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 12:39:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 12:39:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:39:55,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:39:55,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:40:00,847 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:40:00,848 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 12:40:00,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:40:00 BoogieIcfgContainer [2020-07-20 12:40:00,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:40:00,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:40:00,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:40:00,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:40:00,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:39:51" (1/3) ... [2020-07-20 12:40:00,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157f88cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:40:00, skipping insertion in model container [2020-07-20 12:40:00,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:39:55" (2/3) ... [2020-07-20 12:40:00,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157f88cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:40:00, skipping insertion in model container [2020-07-20 12:40:00,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:40:00" (3/3) ... [2020-07-20 12:40:00,883 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 12:40:00,894 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:40:00,905 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 12:40:00,919 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 12:40:00,949 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:40:00,949 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:40:00,949 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:40:00,950 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:40:00,950 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:40:00,950 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:40:00,950 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:40:00,950 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:40:00,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states. [2020-07-20 12:40:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 12:40:01,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:01,049 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] [2020-07-20 12:40:01,049 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:01,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:01,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times [2020-07-20 12:40:01,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:01,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900198083] [2020-07-20 12:40:01,066 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 [2020-07-20 12:40:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:01,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 3066 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:40:01,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:02,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:02,516 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:02,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900198083] [2020-07-20 12:40:02,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:02,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:40:02,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182971937] [2020-07-20 12:40:02,525 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:40:02,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:02,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:40:02,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:40:02,539 INFO L87 Difference]: Start difference. First operand 1506 states. Second operand 4 states. [2020-07-20 12:40:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:03,011 INFO L93 Difference]: Finished difference Result 4363 states and 7870 transitions. [2020-07-20 12:40:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:40:03,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-20 12:40:03,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:03,051 INFO L225 Difference]: With dead ends: 4363 [2020-07-20 12:40:03,051 INFO L226 Difference]: Without dead ends: 2926 [2020-07-20 12:40:03,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:40:03,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2020-07-20 12:40:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 2865. [2020-07-20 12:40:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-07-20 12:40:03,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4697 transitions. [2020-07-20 12:40:03,285 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4697 transitions. Word has length 493 [2020-07-20 12:40:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:03,291 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4697 transitions. [2020-07-20 12:40:03,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:40:03,291 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4697 transitions. [2020-07-20 12:40:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-20 12:40:03,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:03,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:03,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:03,528 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:03,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:03,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1441262864, now seen corresponding path program 1 times [2020-07-20 12:40:03,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:03,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496260991] [2020-07-20 12:40:03,531 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 [2020-07-20 12:40:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:04,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 3069 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:04,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:04,425 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:04,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496260991] [2020-07-20 12:40:04,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:04,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:04,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266372179] [2020-07-20 12:40:04,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:04,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:04,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:04,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:04,435 INFO L87 Difference]: Start difference. First operand 2865 states and 4697 transitions. Second operand 3 states. [2020-07-20 12:40:04,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:04,768 INFO L93 Difference]: Finished difference Result 8273 states and 13509 transitions. [2020-07-20 12:40:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:04,769 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-20 12:40:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:04,800 INFO L225 Difference]: With dead ends: 8273 [2020-07-20 12:40:04,801 INFO L226 Difference]: Without dead ends: 5573 [2020-07-20 12:40:04,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5573 states. [2020-07-20 12:40:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5573 to 5512. [2020-07-20 12:40:05,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5512 states. [2020-07-20 12:40:05,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5512 states to 5512 states and 8993 transitions. [2020-07-20 12:40:05,066 INFO L78 Accepts]: Start accepts. Automaton has 5512 states and 8993 transitions. Word has length 495 [2020-07-20 12:40:05,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:05,069 INFO L479 AbstractCegarLoop]: Abstraction has 5512 states and 8993 transitions. [2020-07-20 12:40:05,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:05,069 INFO L276 IsEmpty]: Start isEmpty. Operand 5512 states and 8993 transitions. [2020-07-20 12:40:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 12:40:05,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:05,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:05,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:05,313 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:05,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:05,314 INFO L82 PathProgramCache]: Analyzing trace with hash -894042864, now seen corresponding path program 1 times [2020-07-20 12:40:05,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:05,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005276095] [2020-07-20 12:40:05,315 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 [2020-07-20 12:40:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:05,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:05,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:06,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:06,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005276095] [2020-07-20 12:40:06,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:06,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:06,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199367460] [2020-07-20 12:40:06,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:06,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:06,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:06,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:06,173 INFO L87 Difference]: Start difference. First operand 5512 states and 8993 transitions. Second operand 3 states. [2020-07-20 12:40:06,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:06,469 INFO L93 Difference]: Finished difference Result 15764 states and 25565 transitions. [2020-07-20 12:40:06,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:06,470 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-20 12:40:06,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:06,532 INFO L225 Difference]: With dead ends: 15764 [2020-07-20 12:40:06,532 INFO L226 Difference]: Without dead ends: 10641 [2020-07-20 12:40:06,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:06,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10641 states. [2020-07-20 12:40:06,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10641 to 5564. [2020-07-20 12:40:06,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5564 states. [2020-07-20 12:40:06,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5564 states to 5564 states and 9073 transitions. [2020-07-20 12:40:06,836 INFO L78 Accepts]: Start accepts. Automaton has 5564 states and 9073 transitions. Word has length 496 [2020-07-20 12:40:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:06,836 INFO L479 AbstractCegarLoop]: Abstraction has 5564 states and 9073 transitions. [2020-07-20 12:40:06,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:06,837 INFO L276 IsEmpty]: Start isEmpty. Operand 5564 states and 9073 transitions. [2020-07-20 12:40:06,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 12:40:06,910 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:06,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:07,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:07,122 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:07,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:07,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1888108171, now seen corresponding path program 1 times [2020-07-20 12:40:07,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:07,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130752160] [2020-07-20 12:40:07,123 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 [2020-07-20 12:40:07,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:07,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 3072 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:07,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:07,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:07,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130752160] [2020-07-20 12:40:07,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:07,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:07,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752287335] [2020-07-20 12:40:07,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:07,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:07,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:07,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:07,938 INFO L87 Difference]: Start difference. First operand 5564 states and 9073 transitions. Second operand 3 states. [2020-07-20 12:40:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:08,407 INFO L93 Difference]: Finished difference Result 16256 states and 26438 transitions. [2020-07-20 12:40:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:08,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-20 12:40:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:08,454 INFO L225 Difference]: With dead ends: 16256 [2020-07-20 12:40:08,455 INFO L226 Difference]: Without dead ends: 10923 [2020-07-20 12:40:08,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10923 states. [2020-07-20 12:40:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10923 to 10862. [2020-07-20 12:40:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10862 states. [2020-07-20 12:40:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10862 states to 10862 states and 17636 transitions. [2020-07-20 12:40:08,870 INFO L78 Accepts]: Start accepts. Automaton has 10862 states and 17636 transitions. Word has length 497 [2020-07-20 12:40:08,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:08,870 INFO L479 AbstractCegarLoop]: Abstraction has 10862 states and 17636 transitions. [2020-07-20 12:40:08,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:08,871 INFO L276 IsEmpty]: Start isEmpty. Operand 10862 states and 17636 transitions. [2020-07-20 12:40:08,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 12:40:08,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:08,902 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:09,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:09,116 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:09,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:09,117 INFO L82 PathProgramCache]: Analyzing trace with hash 518974352, now seen corresponding path program 1 times [2020-07-20 12:40:09,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:09,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003464846] [2020-07-20 12:40:09,118 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 [2020-07-20 12:40:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:09,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:09,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:09,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:09,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003464846] [2020-07-20 12:40:09,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:09,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:09,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564900299] [2020-07-20 12:40:09,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:09,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:09,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:09,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:09,966 INFO L87 Difference]: Start difference. First operand 10862 states and 17636 transitions. Second operand 3 states. [2020-07-20 12:40:10,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:10,445 INFO L93 Difference]: Finished difference Result 31126 states and 50264 transitions. [2020-07-20 12:40:10,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:10,445 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-20 12:40:10,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:10,497 INFO L225 Difference]: With dead ends: 31126 [2020-07-20 12:40:10,497 INFO L226 Difference]: Without dead ends: 21001 [2020-07-20 12:40:10,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:10,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21001 states. [2020-07-20 12:40:10,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21001 to 11020. [2020-07-20 12:40:10,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11020 states. [2020-07-20 12:40:10,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11020 states to 11020 states and 17874 transitions. [2020-07-20 12:40:10,967 INFO L78 Accepts]: Start accepts. Automaton has 11020 states and 17874 transitions. Word has length 497 [2020-07-20 12:40:10,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:10,967 INFO L479 AbstractCegarLoop]: Abstraction has 11020 states and 17874 transitions. [2020-07-20 12:40:10,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:10,968 INFO L276 IsEmpty]: Start isEmpty. Operand 11020 states and 17874 transitions. [2020-07-20 12:40:10,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 12:40:10,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:10,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:11,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:11,211 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:11,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1268982465, now seen corresponding path program 1 times [2020-07-20 12:40:11,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:11,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570912281] [2020-07-20 12:40:11,212 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 [2020-07-20 12:40:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:12,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:12,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:12,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:12,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570912281] [2020-07-20 12:40:12,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:12,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:12,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954462250] [2020-07-20 12:40:12,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:12,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:12,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:12,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:12,667 INFO L87 Difference]: Start difference. First operand 11020 states and 17874 transitions. Second operand 3 states. [2020-07-20 12:40:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:13,477 INFO L93 Difference]: Finished difference Result 31340 states and 50543 transitions. [2020-07-20 12:40:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:13,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-20 12:40:13,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:13,550 INFO L225 Difference]: With dead ends: 31340 [2020-07-20 12:40:13,550 INFO L226 Difference]: Without dead ends: 21191 [2020-07-20 12:40:13,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:13,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21191 states. [2020-07-20 12:40:14,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21191 to 11210. [2020-07-20 12:40:14,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11210 states. [2020-07-20 12:40:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11210 states to 11210 states and 18116 transitions. [2020-07-20 12:40:14,166 INFO L78 Accepts]: Start accepts. Automaton has 11210 states and 18116 transitions. Word has length 498 [2020-07-20 12:40:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:14,166 INFO L479 AbstractCegarLoop]: Abstraction has 11210 states and 18116 transitions. [2020-07-20 12:40:14,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 11210 states and 18116 transitions. [2020-07-20 12:40:14,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 12:40:14,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:14,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:14,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:14,406 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:14,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:14,406 INFO L82 PathProgramCache]: Analyzing trace with hash -631221630, now seen corresponding path program 1 times [2020-07-20 12:40:14,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:14,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804020606] [2020-07-20 12:40:14,407 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 [2020-07-20 12:40:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:15,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 3085 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:40:15,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:15,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:15,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804020606] [2020-07-20 12:40:15,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:15,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:40:15,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942786473] [2020-07-20 12:40:15,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:40:15,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:15,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:40:15,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:40:15,798 INFO L87 Difference]: Start difference. First operand 11210 states and 18116 transitions. Second operand 8 states. [2020-07-20 12:40:18,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:18,484 INFO L93 Difference]: Finished difference Result 23720 states and 37804 transitions. [2020-07-20 12:40:18,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:40:18,484 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 499 [2020-07-20 12:40:18,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:18,544 INFO L225 Difference]: With dead ends: 23720 [2020-07-20 12:40:18,544 INFO L226 Difference]: Without dead ends: 16883 [2020-07-20 12:40:18,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:40:18,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16883 states. [2020-07-20 12:40:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16883 to 11890. [2020-07-20 12:40:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11890 states. [2020-07-20 12:40:19,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11890 states to 11890 states and 18992 transitions. [2020-07-20 12:40:19,185 INFO L78 Accepts]: Start accepts. Automaton has 11890 states and 18992 transitions. Word has length 499 [2020-07-20 12:40:19,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:19,186 INFO L479 AbstractCegarLoop]: Abstraction has 11890 states and 18992 transitions. [2020-07-20 12:40:19,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:40:19,187 INFO L276 IsEmpty]: Start isEmpty. Operand 11890 states and 18992 transitions. [2020-07-20 12:40:19,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 12:40:19,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:19,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:19,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:19,423 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:19,424 INFO L82 PathProgramCache]: Analyzing trace with hash -10319338, now seen corresponding path program 1 times [2020-07-20 12:40:19,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:19,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109072294] [2020-07-20 12:40:19,426 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 [2020-07-20 12:40:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:20,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 3081 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:20,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:20,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:20,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109072294] [2020-07-20 12:40:20,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:20,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:20,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825612343] [2020-07-20 12:40:20,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:20,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:20,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:20,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:20,230 INFO L87 Difference]: Start difference. First operand 11890 states and 18992 transitions. Second operand 3 states. [2020-07-20 12:40:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:20,752 INFO L93 Difference]: Finished difference Result 21244 states and 33671 transitions. [2020-07-20 12:40:20,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:20,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 12:40:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:20,884 INFO L225 Difference]: With dead ends: 21244 [2020-07-20 12:40:20,884 INFO L226 Difference]: Without dead ends: 14595 [2020-07-20 12:40:20,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:20,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14595 states. [2020-07-20 12:40:21,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14595 to 13306. [2020-07-20 12:40:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13306 states. [2020-07-20 12:40:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13306 states to 13306 states and 21308 transitions. [2020-07-20 12:40:21,514 INFO L78 Accepts]: Start accepts. Automaton has 13306 states and 21308 transitions. Word has length 499 [2020-07-20 12:40:21,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:21,514 INFO L479 AbstractCegarLoop]: Abstraction has 13306 states and 21308 transitions. [2020-07-20 12:40:21,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:21,514 INFO L276 IsEmpty]: Start isEmpty. Operand 13306 states and 21308 transitions. [2020-07-20 12:40:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 12:40:21,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:21,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:21,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:21,731 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:21,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:21,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1794357690, now seen corresponding path program 1 times [2020-07-20 12:40:21,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:21,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527257379] [2020-07-20 12:40:21,733 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 [2020-07-20 12:40:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:22,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:22,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:22,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:22,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527257379] [2020-07-20 12:40:22,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:22,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:22,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41799636] [2020-07-20 12:40:22,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:22,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:22,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:22,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:22,659 INFO L87 Difference]: Start difference. First operand 13306 states and 21308 transitions. Second operand 3 states. [2020-07-20 12:40:23,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:23,583 INFO L93 Difference]: Finished difference Result 39061 states and 62406 transitions. [2020-07-20 12:40:23,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:23,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 12:40:23,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:23,626 INFO L225 Difference]: With dead ends: 39061 [2020-07-20 12:40:23,626 INFO L226 Difference]: Without dead ends: 26129 [2020-07-20 12:40:23,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:23,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26129 states. [2020-07-20 12:40:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26129 to 26068. [2020-07-20 12:40:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26068 states. [2020-07-20 12:40:25,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26068 states to 26068 states and 41531 transitions. [2020-07-20 12:40:25,532 INFO L78 Accepts]: Start accepts. Automaton has 26068 states and 41531 transitions. Word has length 499 [2020-07-20 12:40:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:25,533 INFO L479 AbstractCegarLoop]: Abstraction has 26068 states and 41531 transitions. [2020-07-20 12:40:25,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 26068 states and 41531 transitions. [2020-07-20 12:40:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 12:40:25,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:25,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:25,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:25,754 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:25,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1293501309, now seen corresponding path program 1 times [2020-07-20 12:40:25,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:25,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762383254] [2020-07-20 12:40:25,757 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 [2020-07-20 12:40:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:26,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 3076 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:40:26,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:26,548 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:26,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762383254] [2020-07-20 12:40:26,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:26,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:40:26,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496247091] [2020-07-20 12:40:26,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:40:26,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:26,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:40:26,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:40:26,550 INFO L87 Difference]: Start difference. First operand 26068 states and 41531 transitions. Second operand 4 states. [2020-07-20 12:40:28,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:28,004 INFO L93 Difference]: Finished difference Result 70556 states and 111502 transitions. [2020-07-20 12:40:28,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:40:28,005 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2020-07-20 12:40:28,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:28,072 INFO L225 Difference]: With dead ends: 70556 [2020-07-20 12:40:28,072 INFO L226 Difference]: Without dead ends: 48891 [2020-07-20 12:40:28,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:40:28,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48891 states. [2020-07-20 12:40:29,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48891 to 28756. [2020-07-20 12:40:29,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28756 states. [2020-07-20 12:40:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28756 states to 28756 states and 46220 transitions. [2020-07-20 12:40:29,621 INFO L78 Accepts]: Start accepts. Automaton has 28756 states and 46220 transitions. Word has length 499 [2020-07-20 12:40:29,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:29,621 INFO L479 AbstractCegarLoop]: Abstraction has 28756 states and 46220 transitions. [2020-07-20 12:40:29,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:40:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 28756 states and 46220 transitions. [2020-07-20 12:40:29,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 12:40:29,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:29,643 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:29,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:29,857 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:29,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:29,858 INFO L82 PathProgramCache]: Analyzing trace with hash -268212577, now seen corresponding path program 1 times [2020-07-20 12:40:29,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:29,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423574310] [2020-07-20 12:40:29,859 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 [2020-07-20 12:40:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:30,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 3088 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:40:30,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:30,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:30,980 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:30,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423574310] [2020-07-20 12:40:30,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:30,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:40:30,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774313425] [2020-07-20 12:40:30,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:40:30,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:30,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:40:30,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:40:30,982 INFO L87 Difference]: Start difference. First operand 28756 states and 46220 transitions. Second operand 8 states. [2020-07-20 12:40:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:35,970 INFO L93 Difference]: Finished difference Result 60627 states and 96988 transitions. [2020-07-20 12:40:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:40:35,971 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 501 [2020-07-20 12:40:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:36,034 INFO L225 Difference]: With dead ends: 60627 [2020-07-20 12:40:36,035 INFO L226 Difference]: Without dead ends: 52802 [2020-07-20 12:40:36,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:40:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52802 states. [2020-07-20 12:40:37,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52802 to 34240. [2020-07-20 12:40:37,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34240 states. [2020-07-20 12:40:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34240 states to 34240 states and 54764 transitions. [2020-07-20 12:40:37,637 INFO L78 Accepts]: Start accepts. Automaton has 34240 states and 54764 transitions. Word has length 501 [2020-07-20 12:40:37,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:37,637 INFO L479 AbstractCegarLoop]: Abstraction has 34240 states and 54764 transitions. [2020-07-20 12:40:37,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:40:37,638 INFO L276 IsEmpty]: Start isEmpty. Operand 34240 states and 54764 transitions. [2020-07-20 12:40:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 12:40:37,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:37,671 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, 1, 1, 1, 1, 1] [2020-07-20 12:40:37,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:37,885 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:37,886 INFO L82 PathProgramCache]: Analyzing trace with hash -200437430, now seen corresponding path program 1 times [2020-07-20 12:40:37,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:37,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497669475] [2020-07-20 12:40:37,887 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 [2020-07-20 12:40:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:38,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 3084 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:38,688 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:38,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497669475] [2020-07-20 12:40:38,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:38,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:38,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223796188] [2020-07-20 12:40:38,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:38,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:38,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:38,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:38,690 INFO L87 Difference]: Start difference. First operand 34240 states and 54764 transitions. Second operand 3 states. [2020-07-20 12:40:40,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:40,554 INFO L93 Difference]: Finished difference Result 66506 states and 105367 transitions. [2020-07-20 12:40:40,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:40,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-20 12:40:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:40,606 INFO L225 Difference]: With dead ends: 66506 [2020-07-20 12:40:40,606 INFO L226 Difference]: Without dead ends: 43989 [2020-07-20 12:40:40,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43989 states. [2020-07-20 12:40:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43989 to 39360. [2020-07-20 12:40:42,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39360 states. [2020-07-20 12:40:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39360 states to 39360 states and 63148 transitions. [2020-07-20 12:40:42,703 INFO L78 Accepts]: Start accepts. Automaton has 39360 states and 63148 transitions. Word has length 501 [2020-07-20 12:40:42,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:42,703 INFO L479 AbstractCegarLoop]: Abstraction has 39360 states and 63148 transitions. [2020-07-20 12:40:42,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 39360 states and 63148 transitions. [2020-07-20 12:40:42,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 12:40:42,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:42,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:42,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:42,929 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:42,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:42,930 INFO L82 PathProgramCache]: Analyzing trace with hash -956988575, now seen corresponding path program 1 times [2020-07-20 12:40:42,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:42,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [392784595] [2020-07-20 12:40:42,931 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 [2020-07-20 12:40:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:43,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 3086 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:40:43,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:43,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:43,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:43,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [392784595] [2020-07-20 12:40:43,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:43,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:40:43,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080485796] [2020-07-20 12:40:43,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:40:43,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:43,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:40:43,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:40:43,843 INFO L87 Difference]: Start difference. First operand 39360 states and 63148 transitions. Second operand 5 states. [2020-07-20 12:40:47,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:47,106 INFO L93 Difference]: Finished difference Result 65901 states and 104875 transitions. [2020-07-20 12:40:47,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:40:47,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 502 [2020-07-20 12:40:47,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:47,156 INFO L225 Difference]: With dead ends: 65901 [2020-07-20 12:40:47,156 INFO L226 Difference]: Without dead ends: 39360 [2020-07-20 12:40:47,187 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 [2020-07-20 12:40:47,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39360 states. [2020-07-20 12:40:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39360 to 39360. [2020-07-20 12:40:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39360 states. [2020-07-20 12:40:49,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39360 states to 39360 states and 62652 transitions. [2020-07-20 12:40:49,177 INFO L78 Accepts]: Start accepts. Automaton has 39360 states and 62652 transitions. Word has length 502 [2020-07-20 12:40:49,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:49,178 INFO L479 AbstractCegarLoop]: Abstraction has 39360 states and 62652 transitions. [2020-07-20 12:40:49,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:40:49,178 INFO L276 IsEmpty]: Start isEmpty. Operand 39360 states and 62652 transitions. [2020-07-20 12:40:49,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 12:40:49,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:49,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:49,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:49,406 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:49,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:49,407 INFO L82 PathProgramCache]: Analyzing trace with hash -33153018, now seen corresponding path program 1 times [2020-07-20 12:40:49,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:49,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169466655] [2020-07-20 12:40:49,408 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 [2020-07-20 12:40:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:50,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 3087 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:40:50,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:50,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:50,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169466655] [2020-07-20 12:40:50,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:50,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:40:50,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908040626] [2020-07-20 12:40:50,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:40:50,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:50,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:40:50,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:40:50,352 INFO L87 Difference]: Start difference. First operand 39360 states and 62652 transitions. Second operand 4 states. [2020-07-20 12:40:54,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:54,018 INFO L93 Difference]: Finished difference Result 117223 states and 186655 transitions. [2020-07-20 12:40:54,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:40:54,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-20 12:40:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:54,101 INFO L225 Difference]: With dead ends: 117223 [2020-07-20 12:40:54,101 INFO L226 Difference]: Without dead ends: 77878 [2020-07-20 12:40:54,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:40:54,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77878 states. [2020-07-20 12:40:59,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77878 to 77833. [2020-07-20 12:40:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77833 states. [2020-07-20 12:40:59,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77833 states to 77833 states and 123531 transitions. [2020-07-20 12:40:59,368 INFO L78 Accepts]: Start accepts. Automaton has 77833 states and 123531 transitions. Word has length 502 [2020-07-20 12:40:59,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:59,369 INFO L479 AbstractCegarLoop]: Abstraction has 77833 states and 123531 transitions. [2020-07-20 12:40:59,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:40:59,369 INFO L276 IsEmpty]: Start isEmpty. Operand 77833 states and 123531 transitions. [2020-07-20 12:40:59,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 12:40:59,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:59,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:59,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:59,645 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:59,646 INFO L82 PathProgramCache]: Analyzing trace with hash 510332263, now seen corresponding path program 1 times [2020-07-20 12:40:59,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:59,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534973680] [2020-07-20 12:40:59,647 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 [2020-07-20 12:41:00,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:41:00,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 3090 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:41:00,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:41:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:41:00,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:41:00,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534973680] [2020-07-20 12:41:00,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:41:00,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:41:00,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616887422] [2020-07-20 12:41:00,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:41:00,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:41:00,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:41:00,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:41:00,511 INFO L87 Difference]: Start difference. First operand 77833 states and 123531 transitions. Second operand 3 states. [2020-07-20 12:41:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:41:09,208 INFO L93 Difference]: Finished difference Result 230301 states and 365180 transitions. [2020-07-20 12:41:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:41:09,208 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-20 12:41:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:41:09,397 INFO L225 Difference]: With dead ends: 230301 [2020-07-20 12:41:09,397 INFO L226 Difference]: Without dead ends: 153921 [2020-07-20 12:41:09,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:41:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153921 states. [2020-07-20 12:41:19,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153921 to 153878. [2020-07-20 12:41:19,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153878 states. [2020-07-20 12:41:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153878 states to 153878 states and 243385 transitions. [2020-07-20 12:41:19,566 INFO L78 Accepts]: Start accepts. Automaton has 153878 states and 243385 transitions. Word has length 504 [2020-07-20 12:41:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:41:19,567 INFO L479 AbstractCegarLoop]: Abstraction has 153878 states and 243385 transitions. [2020-07-20 12:41:19,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:41:19,567 INFO L276 IsEmpty]: Start isEmpty. Operand 153878 states and 243385 transitions. [2020-07-20 12:41:19,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 12:41:19,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:41:19,656 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:41:19,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:19,857 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:41:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:41:19,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2015355056, now seen corresponding path program 1 times [2020-07-20 12:41:19,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:41:19,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462029101] [2020-07-20 12:41:19,860 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 [2020-07-20 12:41:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:41:20,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 3092 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:41:20,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:41:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:41:20,957 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:41:20,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462029101] [2020-07-20 12:41:20,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:41:20,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:41:20,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363520901] [2020-07-20 12:41:20,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:41:20,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:41:20,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:41:20,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:41:20,959 INFO L87 Difference]: Start difference. First operand 153878 states and 243385 transitions. Second operand 3 states. [2020-07-20 12:41:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:41:37,640 INFO L93 Difference]: Finished difference Result 460098 states and 727365 transitions. [2020-07-20 12:41:37,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:41:37,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 505 [2020-07-20 12:41:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:41:38,019 INFO L225 Difference]: With dead ends: 460098 [2020-07-20 12:41:38,020 INFO L226 Difference]: Without dead ends: 306251 [2020-07-20 12:41:38,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:41:38,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306251 states. [2020-07-20 12:41:48,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306251 to 153904. [2020-07-20 12:41:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153904 states. [2020-07-20 12:41:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153904 states to 153904 states and 243423 transitions. [2020-07-20 12:41:48,379 INFO L78 Accepts]: Start accepts. Automaton has 153904 states and 243423 transitions. Word has length 505 [2020-07-20 12:41:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:41:48,380 INFO L479 AbstractCegarLoop]: Abstraction has 153904 states and 243423 transitions. [2020-07-20 12:41:48,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:41:48,380 INFO L276 IsEmpty]: Start isEmpty. Operand 153904 states and 243423 transitions. [2020-07-20 12:41:48,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 12:41:48,470 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:41:48,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:41:48,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:48,671 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:41:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:41:48,672 INFO L82 PathProgramCache]: Analyzing trace with hash 19081858, now seen corresponding path program 1 times [2020-07-20 12:41:48,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:41:48,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607406426] [2020-07-20 12:41:48,674 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 [2020-07-20 12:41:49,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:41:49,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 3093 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:41:49,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:41:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:41:49,562 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:41:49,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607406426] [2020-07-20 12:41:49,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:41:49,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:41:49,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444709174] [2020-07-20 12:41:49,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:41:49,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:41:49,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:41:49,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:41:49,564 INFO L87 Difference]: Start difference. First operand 153904 states and 243423 transitions. Second operand 3 states. [2020-07-20 12:42:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:42:07,703 INFO L93 Difference]: Finished difference Result 456543 states and 721426 transitions. [2020-07-20 12:42:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:42:07,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 506 [2020-07-20 12:42:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:42:08,089 INFO L225 Difference]: With dead ends: 456543 [2020-07-20 12:42:08,089 INFO L226 Difference]: Without dead ends: 304267 [2020-07-20 12:42:08,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:42:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304267 states. [2020-07-20 12:42:30,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304267 to 304226. [2020-07-20 12:42:30,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304226 states. [2020-07-20 12:42:30,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304226 states to 304226 states and 479139 transitions. [2020-07-20 12:42:30,632 INFO L78 Accepts]: Start accepts. Automaton has 304226 states and 479139 transitions. Word has length 506 [2020-07-20 12:42:30,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:42:30,632 INFO L479 AbstractCegarLoop]: Abstraction has 304226 states and 479139 transitions. [2020-07-20 12:42:30,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:42:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 304226 states and 479139 transitions. [2020-07-20 12:42:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 12:42:30,815 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:42:30,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:42:31,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:42:31,016 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:42:31,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:42:31,017 INFO L82 PathProgramCache]: Analyzing trace with hash -2059982841, now seen corresponding path program 1 times [2020-07-20 12:42:31,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:42:31,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844989018] [2020-07-20 12:42:31,018 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 [2020-07-20 12:42:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:42:31,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 3095 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:42:31,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:42:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:42:31,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:42:31,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844989018] [2020-07-20 12:42:31,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:42:31,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:42:31,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560231944] [2020-07-20 12:42:31,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:42:31,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:42:31,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:42:31,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:42:31,863 INFO L87 Difference]: Start difference. First operand 304226 states and 479139 transitions. Second operand 3 states. [2020-07-20 12:43:15,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:43:15,813 INFO L93 Difference]: Finished difference Result 912540 states and 1437186 transitions. [2020-07-20 12:43:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:43:15,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 506 [2020-07-20 12:43:15,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:43:16,598 INFO L225 Difference]: With dead ends: 912540 [2020-07-20 12:43:16,599 INFO L226 Difference]: Without dead ends: 608366 [2020-07-20 12:43:16,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:43:17,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608366 states. [2020-07-20 12:43:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608366 to 304288. [2020-07-20 12:43:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304288 states. [2020-07-20 12:43:45,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304288 states to 304288 states and 479232 transitions. [2020-07-20 12:43:45,550 INFO L78 Accepts]: Start accepts. Automaton has 304288 states and 479232 transitions. Word has length 506 [2020-07-20 12:43:45,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:43:45,551 INFO L479 AbstractCegarLoop]: Abstraction has 304288 states and 479232 transitions. [2020-07-20 12:43:45,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:43:45,551 INFO L276 IsEmpty]: Start isEmpty. Operand 304288 states and 479232 transitions. [2020-07-20 12:43:45,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-20 12:43:45,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:43:45,740 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] [2020-07-20 12:43:45,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:43:45,941 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:43:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:43:45,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1038939265, now seen corresponding path program 1 times [2020-07-20 12:43:45,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:43:45,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146809389] [2020-07-20 12:43:45,943 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 [2020-07-20 12:43:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:43:46,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:43:46,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:43:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:43:46,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:43:46,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146809389] [2020-07-20 12:43:46,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:43:46,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:43:46,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632379109] [2020-07-20 12:43:47,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:43:47,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:43:47,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:43:47,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:43:47,276 INFO L87 Difference]: Start difference. First operand 304288 states and 479232 transitions. Second operand 3 states. [2020-07-20 12:44:29,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:44:29,213 INFO L93 Difference]: Finished difference Result 912647 states and 1437332 transitions. [2020-07-20 12:44:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:44:29,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-20 12:44:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:44:29,972 INFO L225 Difference]: With dead ends: 912647 [2020-07-20 12:44:29,972 INFO L226 Difference]: Without dead ends: 608472 [2020-07-20 12:44:30,202 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 [2020-07-20 12:44:30,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608472 states. [2020-07-20 12:45:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608472 to 304394. [2020-07-20 12:45:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304394 states. [2020-07-20 12:45:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304394 states to 304394 states and 479371 transitions. [2020-07-20 12:45:00,866 INFO L78 Accepts]: Start accepts. Automaton has 304394 states and 479371 transitions. Word has length 507 [2020-07-20 12:45:00,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:45:00,866 INFO L479 AbstractCegarLoop]: Abstraction has 304394 states and 479371 transitions. [2020-07-20 12:45:00,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:45:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 304394 states and 479371 transitions. [2020-07-20 12:45:01,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-20 12:45:01,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:45:01,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:45:01,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:45:01,259 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:45:01,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:45:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash 757080527, now seen corresponding path program 1 times [2020-07-20 12:45:01,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:45:01,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984991310] [2020-07-20 12:45:01,261 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 [2020-07-20 12:45:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:45:01,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 3114 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:45:01,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:45:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:45:02,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:45:02,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984991310] [2020-07-20 12:45:02,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:45:02,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:45:02,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102240262] [2020-07-20 12:45:02,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:45:02,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:45:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:45:02,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:45:02,347 INFO L87 Difference]: Start difference. First operand 304394 states and 479371 transitions. Second operand 8 states. [2020-07-20 12:46:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:46:10,439 INFO L93 Difference]: Finished difference Result 939970 states and 1467237 transitions. [2020-07-20 12:46:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:46:10,439 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 508 [2020-07-20 12:46:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:46:11,496 INFO L225 Difference]: With dead ends: 939970 [2020-07-20 12:46:11,496 INFO L226 Difference]: Without dead ends: 730388 [2020-07-20 12:46:11,708 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 [2020-07-20 12:46:12,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730388 states. [2020-07-20 12:46:57,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730388 to 427498. [2020-07-20 12:46:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427498 states. [2020-07-20 12:46:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427498 states to 427498 states and 662331 transitions. [2020-07-20 12:46:58,210 INFO L78 Accepts]: Start accepts. Automaton has 427498 states and 662331 transitions. Word has length 508 [2020-07-20 12:46:58,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:46:58,211 INFO L479 AbstractCegarLoop]: Abstraction has 427498 states and 662331 transitions. [2020-07-20 12:46:58,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:46:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 427498 states and 662331 transitions. [2020-07-20 12:46:58,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-20 12:46:58,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:46:58,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:46:58,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:46:58,656 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:46:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:46:58,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1509536725, now seen corresponding path program 1 times [2020-07-20 12:46:58,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:46:58,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066713660] [2020-07-20 12:46:58,658 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 [2020-07-20 12:46:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:46:59,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 3102 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:46:59,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:46:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:46:59,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:46:59,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066713660] [2020-07-20 12:46:59,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:46:59,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:46:59,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701350381] [2020-07-20 12:46:59,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:46:59,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:46:59,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:46:59,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:46:59,434 INFO L87 Difference]: Start difference. First operand 427498 states and 662331 transitions. Second operand 3 states. [2020-07-20 12:47:54,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:47:54,414 INFO L93 Difference]: Finished difference Result 923578 states and 1421752 transitions. [2020-07-20 12:47:54,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:47:54,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 508 [2020-07-20 12:47:54,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:47:55,212 INFO L225 Difference]: With dead ends: 923578 [2020-07-20 12:47:55,212 INFO L226 Difference]: Without dead ends: 585132 [2020-07-20 12:47:55,444 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 [2020-07-20 12:47:55,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585132 states. [2020-07-20 12:48:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585132 to 525930. [2020-07-20 12:48:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 525930 states. [2020-07-20 12:48:59,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525930 states to 525930 states and 821339 transitions. [2020-07-20 12:48:59,286 INFO L78 Accepts]: Start accepts. Automaton has 525930 states and 821339 transitions. Word has length 508 [2020-07-20 12:48:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:48:59,287 INFO L479 AbstractCegarLoop]: Abstraction has 525930 states and 821339 transitions. [2020-07-20 12:48:59,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:48:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 525930 states and 821339 transitions. [2020-07-20 12:48:59,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-20 12:48:59,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:48:59,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:48:59,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:48:59,727 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:48:59,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:48:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash 278314941, now seen corresponding path program 1 times [2020-07-20 12:48:59,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:48:59,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89048842] [2020-07-20 12:48:59,729 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 [2020-07-20 12:49:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:49:00,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 3096 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:49:00,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:49:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:49:00,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:49:00,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89048842] [2020-07-20 12:49:00,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:49:00,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:49:00,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102820843] [2020-07-20 12:49:00,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:49:00,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:49:00,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:49:00,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:49:00,577 INFO L87 Difference]: Start difference. First operand 525930 states and 821339 transitions. Second operand 3 states. [2020-07-20 12:50:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:50:37,147 INFO L93 Difference]: Finished difference Result 1553834 states and 2427766 transitions. [2020-07-20 12:50:37,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:50:37,148 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 508 [2020-07-20 12:50:37,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:50:38,705 INFO L225 Difference]: With dead ends: 1553834 [2020-07-20 12:50:38,705 INFO L226 Difference]: Without dead ends: 1035750 [2020-07-20 12:50:39,084 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 [2020-07-20 12:50:39,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035750 states.