/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.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:36:18,691 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:36:18,695 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:36:18,714 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:36:18,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:36:18,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:36:18,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:36:18,733 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:36:18,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:36:18,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:36:18,739 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:36:18,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:36:18,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:36:18,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:36:18,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:36:18,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:36:18,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:36:18,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:36:18,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:36:18,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:36:18,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:36:18,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:36:18,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:36:18,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:36:18,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:36:18,788 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:36:18,789 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:36:18,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:36:18,792 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 12:36:18,813 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:36:18,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:36:18,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:36:18,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:36:18,816 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:36:18,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:36:18,817 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:36:18,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:36:18,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:36:18,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:36:18,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:36:18,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:36:18,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:36:18,819 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:36:18,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:36:18,819 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:36:18,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:36:18,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:36:18,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:36:18,820 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:36:18,820 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:36:18,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:36:18,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:36:18,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:36:18,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:36:18,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:36:18,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:18,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:36:18,822 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:36:18,822 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 12:36:19,092 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:36:19,108 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:36:19,112 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:36:19,113 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:36:19,115 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:36:19,116 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 12:36:19,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0595e5b21/0d7ee13add904e93bbc6da009fbe9ca1/FLAG084eca922 [2020-07-20 12:36:19,911 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:36:19,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 12:36:19,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0595e5b21/0d7ee13add904e93bbc6da009fbe9ca1/FLAG084eca922 [2020-07-20 12:36:20,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0595e5b21/0d7ee13add904e93bbc6da009fbe9ca1 [2020-07-20 12:36:20,024 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:36:20,027 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:36:20,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:36:20,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:36:20,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:36:20,032 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:36:20" (1/1) ... [2020-07-20 12:36:20,035 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 12:36:20, skipping insertion in model container [2020-07-20 12:36:20,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:36:20" (1/1) ... [2020-07-20 12:36:20,044 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:36:20,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:36:21,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:36:21,961 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:36:23,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:36:23,052 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:36:23,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:36:23 WrapperNode [2020-07-20 12:36:23,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:36:23,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:36:23,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:36:23,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:36:23,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:36:23" (1/1) ... [2020-07-20 12:36:23,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:36:23" (1/1) ... [2020-07-20 12:36:23,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:36:23" (1/1) ... [2020-07-20 12:36:23,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:36:23" (1/1) ... [2020-07-20 12:36:23,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:36:23" (1/1) ... [2020-07-20 12:36:23,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:36:23" (1/1) ... [2020-07-20 12:36:23,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:36:23" (1/1) ... [2020-07-20 12:36:23,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:36:23,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:36:23,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:36:23,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:36:23,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:36:23" (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 12:36:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:36:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:36:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:36:23,433 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:36:23,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:36:23,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 12:36:23,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 12:36:23,435 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 12:36:23,435 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:36:23,435 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:36:23,436 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 12:36:23,436 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 12:36:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 12:36:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 12:36:23,437 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 12:36:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 12:36:23,438 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 12:36:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 12:36:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 12:36:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:36:23,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:36:23,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:36:28,271 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:36:28,272 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 12:36:28,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:36:28 BoogieIcfgContainer [2020-07-20 12:36:28,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:36:28,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:36:28,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:36:28,289 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:36:28,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:36:20" (1/3) ... [2020-07-20 12:36:28,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b1421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:36:28, skipping insertion in model container [2020-07-20 12:36:28,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:36:23" (2/3) ... [2020-07-20 12:36:28,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39b1421 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:36:28, skipping insertion in model container [2020-07-20 12:36:28,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:36:28" (3/3) ... [2020-07-20 12:36:28,292 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-20 12:36:28,303 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:36:28,314 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 12:36:28,329 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 12:36:28,362 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:36:28,362 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:36:28,362 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:36:28,362 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:36:28,362 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:36:28,363 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:36:28,363 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:36:28,363 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:36:28,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-07-20 12:36:28,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 12:36:28,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:28,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:28,443 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:28,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:28,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-07-20 12:36:28,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:28,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720894438] [2020-07-20 12:36:28,460 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 12:36:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:29,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 3107 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:36:29,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:29,944 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 12:36:29,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:29,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720894438] [2020-07-20 12:36:29,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:29,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:36:29,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086500643] [2020-07-20 12:36:29,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:36:29,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:29,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:36:29,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:36:29,971 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 4 states. [2020-07-20 12:36:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:30,494 INFO L93 Difference]: Finished difference Result 4394 states and 7936 transitions. [2020-07-20 12:36:30,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:36:30,496 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-20 12:36:30,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:30,533 INFO L225 Difference]: With dead ends: 4394 [2020-07-20 12:36:30,533 INFO L226 Difference]: Without dead ends: 2919 [2020-07-20 12:36:30,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:36:30,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2020-07-20 12:36:30,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2865. [2020-07-20 12:36:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-07-20 12:36:30,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4721 transitions. [2020-07-20 12:36:30,774 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4721 transitions. Word has length 484 [2020-07-20 12:36:30,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:30,778 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4721 transitions. [2020-07-20 12:36:30,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:36:30,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4721 transitions. [2020-07-20 12:36:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 12:36:30,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:30,798 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] [2020-07-20 12:36:31,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:31,012 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:31,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1721765960, now seen corresponding path program 1 times [2020-07-20 12:36:31,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:31,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793324554] [2020-07-20 12:36:31,014 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 12:36:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:31,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 3110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:31,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:31,986 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 12:36:31,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:31,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793324554] [2020-07-20 12:36:31,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:31,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:31,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148332051] [2020-07-20 12:36:31,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:31,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:31,991 INFO L87 Difference]: Start difference. First operand 2865 states and 4721 transitions. Second operand 3 states. [2020-07-20 12:36:32,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:32,352 INFO L93 Difference]: Finished difference Result 8316 states and 13666 transitions. [2020-07-20 12:36:32,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:32,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-20 12:36:32,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:32,386 INFO L225 Difference]: With dead ends: 8316 [2020-07-20 12:36:32,387 INFO L226 Difference]: Without dead ends: 5665 [2020-07-20 12:36:32,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 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 12:36:32,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2020-07-20 12:36:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5613. [2020-07-20 12:36:32,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5613 states. [2020-07-20 12:36:32,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5613 states to 5613 states and 9225 transitions. [2020-07-20 12:36:32,671 INFO L78 Accepts]: Start accepts. Automaton has 5613 states and 9225 transitions. Word has length 486 [2020-07-20 12:36:32,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:32,673 INFO L479 AbstractCegarLoop]: Abstraction has 5613 states and 9225 transitions. [2020-07-20 12:36:32,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:32,673 INFO L276 IsEmpty]: Start isEmpty. Operand 5613 states and 9225 transitions. [2020-07-20 12:36:32,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 12:36:32,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:32,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:32,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:32,915 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:32,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:32,916 INFO L82 PathProgramCache]: Analyzing trace with hash 326918239, now seen corresponding path program 1 times [2020-07-20 12:36:32,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:32,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219580219] [2020-07-20 12:36:32,917 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 12:36:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:33,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 3112 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:33,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:33,815 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 12:36:33,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:33,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219580219] [2020-07-20 12:36:33,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:33,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:33,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362088213] [2020-07-20 12:36:33,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:33,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:33,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:33,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:33,819 INFO L87 Difference]: Start difference. First operand 5613 states and 9225 transitions. Second operand 3 states. [2020-07-20 12:36:34,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:34,146 INFO L93 Difference]: Finished difference Result 16742 states and 27507 transitions. [2020-07-20 12:36:34,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:34,147 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-20 12:36:34,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:34,214 INFO L225 Difference]: With dead ends: 16742 [2020-07-20 12:36:34,214 INFO L226 Difference]: Without dead ends: 11181 [2020-07-20 12:36:34,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:34,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11181 states. [2020-07-20 12:36:34,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11181 to 5660. [2020-07-20 12:36:34,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5660 states. [2020-07-20 12:36:34,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5660 states to 5660 states and 9299 transitions. [2020-07-20 12:36:34,538 INFO L78 Accepts]: Start accepts. Automaton has 5660 states and 9299 transitions. Word has length 487 [2020-07-20 12:36:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:34,538 INFO L479 AbstractCegarLoop]: Abstraction has 5660 states and 9299 transitions. [2020-07-20 12:36:34,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:34,538 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states and 9299 transitions. [2020-07-20 12:36:34,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 12:36:34,553 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:34,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:34,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:34,767 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:34,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:34,768 INFO L82 PathProgramCache]: Analyzing trace with hash -2064835293, now seen corresponding path program 1 times [2020-07-20 12:36:34,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:34,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196883489] [2020-07-20 12:36:34,770 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 12:36:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:35,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 3113 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:35,679 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 12:36:35,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:35,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196883489] [2020-07-20 12:36:35,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:35,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:35,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704914331] [2020-07-20 12:36:35,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:35,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:35,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:35,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:35,682 INFO L87 Difference]: Start difference. First operand 5660 states and 9299 transitions. Second operand 3 states. [2020-07-20 12:36:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:36,156 INFO L93 Difference]: Finished difference Result 16304 states and 26694 transitions. [2020-07-20 12:36:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:36,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-20 12:36:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:36,699 INFO L225 Difference]: With dead ends: 16304 [2020-07-20 12:36:36,699 INFO L226 Difference]: Without dead ends: 11043 [2020-07-20 12:36:36,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:36,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2020-07-20 12:36:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10993. [2020-07-20 12:36:37,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10993 states. [2020-07-20 12:36:37,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10993 states to 10993 states and 17977 transitions. [2020-07-20 12:36:37,105 INFO L78 Accepts]: Start accepts. Automaton has 10993 states and 17977 transitions. Word has length 488 [2020-07-20 12:36:37,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:37,106 INFO L479 AbstractCegarLoop]: Abstraction has 10993 states and 17977 transitions. [2020-07-20 12:36:37,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:37,107 INFO L276 IsEmpty]: Start isEmpty. Operand 10993 states and 17977 transitions. [2020-07-20 12:36:37,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 12:36:37,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:37,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:37,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:37,350 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:37,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:37,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1928250536, now seen corresponding path program 1 times [2020-07-20 12:36:37,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:37,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543866024] [2020-07-20 12:36:37,352 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 12:36:37,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:37,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 3115 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:38,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:38,191 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 12:36:38,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:38,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543866024] [2020-07-20 12:36:38,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:38,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:38,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438917591] [2020-07-20 12:36:38,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:38,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:38,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:38,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:38,195 INFO L87 Difference]: Start difference. First operand 10993 states and 17977 transitions. Second operand 3 states. [2020-07-20 12:36:38,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:38,940 INFO L93 Difference]: Finished difference Result 32723 states and 53486 transitions. [2020-07-20 12:36:38,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:38,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-20 12:36:38,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:39,011 INFO L225 Difference]: With dead ends: 32723 [2020-07-20 12:36:39,011 INFO L226 Difference]: Without dead ends: 21874 [2020-07-20 12:36:39,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:39,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21874 states. [2020-07-20 12:36:39,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21874 to 11091. [2020-07-20 12:36:39,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11091 states. [2020-07-20 12:36:39,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11091 states to 11091 states and 18128 transitions. [2020-07-20 12:36:39,521 INFO L78 Accepts]: Start accepts. Automaton has 11091 states and 18128 transitions. Word has length 488 [2020-07-20 12:36:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:39,522 INFO L479 AbstractCegarLoop]: Abstraction has 11091 states and 18128 transitions. [2020-07-20 12:36:39,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:39,522 INFO L276 IsEmpty]: Start isEmpty. Operand 11091 states and 18128 transitions. [2020-07-20 12:36:39,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 12:36:39,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:39,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:39,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:39,759 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:39,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:39,760 INFO L82 PathProgramCache]: Analyzing trace with hash 844567664, now seen corresponding path program 1 times [2020-07-20 12:36:39,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:39,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771343328] [2020-07-20 12:36:39,761 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 12:36:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:40,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 3116 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:40,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:36:40,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:40,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771343328] [2020-07-20 12:36:40,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:40,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:40,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561631493] [2020-07-20 12:36:40,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:40,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:40,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:40,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:40,717 INFO L87 Difference]: Start difference. First operand 11091 states and 18128 transitions. Second operand 3 states. [2020-07-20 12:36:41,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:41,323 INFO L93 Difference]: Finished difference Result 32858 states and 53667 transitions. [2020-07-20 12:36:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:41,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-20 12:36:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:41,380 INFO L225 Difference]: With dead ends: 32858 [2020-07-20 12:36:41,380 INFO L226 Difference]: Without dead ends: 21991 [2020-07-20 12:36:41,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:41,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21991 states. [2020-07-20 12:36:41,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21991 to 11208. [2020-07-20 12:36:41,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11208 states. [2020-07-20 12:36:42,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11208 states to 11208 states and 18274 transitions. [2020-07-20 12:36:42,017 INFO L78 Accepts]: Start accepts. Automaton has 11208 states and 18274 transitions. Word has length 489 [2020-07-20 12:36:42,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:42,018 INFO L479 AbstractCegarLoop]: Abstraction has 11208 states and 18274 transitions. [2020-07-20 12:36:42,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:42,018 INFO L276 IsEmpty]: Start isEmpty. Operand 11208 states and 18274 transitions. [2020-07-20 12:36:42,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 12:36:42,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:42,040 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:42,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:42,254 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:42,254 INFO L82 PathProgramCache]: Analyzing trace with hash 2127508510, now seen corresponding path program 1 times [2020-07-20 12:36:42,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:42,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514592847] [2020-07-20 12:36:42,255 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 12:36:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:42,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 3126 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:36:42,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:43,616 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 12:36:43,617 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:43,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514592847] [2020-07-20 12:36:43,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:43,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:36:43,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205295654] [2020-07-20 12:36:43,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:36:43,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:43,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:36:43,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:36:43,619 INFO L87 Difference]: Start difference. First operand 11208 states and 18274 transitions. Second operand 8 states. [2020-07-20 12:36:47,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:47,137 INFO L93 Difference]: Finished difference Result 26441 states and 42615 transitions. [2020-07-20 12:36:47,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:36:47,138 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 490 [2020-07-20 12:36:47,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:47,192 INFO L225 Difference]: With dead ends: 26441 [2020-07-20 12:36:47,193 INFO L226 Difference]: Without dead ends: 19934 [2020-07-20 12:36:47,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 483 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 12:36:47,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19934 states. [2020-07-20 12:36:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19934 to 14056. [2020-07-20 12:36:47,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14056 states. [2020-07-20 12:36:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14056 states to 14056 states and 22586 transitions. [2020-07-20 12:36:47,954 INFO L78 Accepts]: Start accepts. Automaton has 14056 states and 22586 transitions. Word has length 490 [2020-07-20 12:36:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:47,955 INFO L479 AbstractCegarLoop]: Abstraction has 14056 states and 22586 transitions. [2020-07-20 12:36:47,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:36:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 14056 states and 22586 transitions. [2020-07-20 12:36:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 12:36:47,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:47,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:48,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:48,190 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:48,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:48,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1322384757, now seen corresponding path program 1 times [2020-07-20 12:36:48,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:48,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108578081] [2020-07-20 12:36:48,193 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 12:36:48,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:48,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 3122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:48,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:49,033 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 12:36:49,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:49,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108578081] [2020-07-20 12:36:49,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:49,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:49,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214619893] [2020-07-20 12:36:49,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:49,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:49,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:49,036 INFO L87 Difference]: Start difference. First operand 14056 states and 22586 transitions. Second operand 3 states. [2020-07-20 12:36:50,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:50,110 INFO L93 Difference]: Finished difference Result 26553 states and 42172 transitions. [2020-07-20 12:36:50,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:50,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-20 12:36:50,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:50,145 INFO L225 Difference]: With dead ends: 26553 [2020-07-20 12:36:50,145 INFO L226 Difference]: Without dead ends: 17046 [2020-07-20 12:36:50,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17046 states. [2020-07-20 12:36:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17046 to 14924. [2020-07-20 12:36:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14924 states. [2020-07-20 12:36:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14924 states to 14924 states and 24026 transitions. [2020-07-20 12:36:50,908 INFO L78 Accepts]: Start accepts. Automaton has 14924 states and 24026 transitions. Word has length 490 [2020-07-20 12:36:50,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:50,908 INFO L479 AbstractCegarLoop]: Abstraction has 14924 states and 24026 transitions. [2020-07-20 12:36:50,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:50,909 INFO L276 IsEmpty]: Start isEmpty. Operand 14924 states and 24026 transitions. [2020-07-20 12:36:50,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 12:36:50,931 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:50,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:51,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:51,132 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:51,133 INFO L82 PathProgramCache]: Analyzing trace with hash -667258338, now seen corresponding path program 1 times [2020-07-20 12:36:51,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:51,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322897272] [2020-07-20 12:36:51,135 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 12:36:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:51,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 3116 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:36:51,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:52,134 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 12:36:52,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:52,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322897272] [2020-07-20 12:36:52,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:52,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:36:52,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168455088] [2020-07-20 12:36:52,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:36:52,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:52,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:36:52,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:52,137 INFO L87 Difference]: Start difference. First operand 14924 states and 24026 transitions. Second operand 3 states. [2020-07-20 12:36:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:53,186 INFO L93 Difference]: Finished difference Result 42944 states and 68975 transitions. [2020-07-20 12:36:53,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:36:53,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-20 12:36:53,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:53,239 INFO L225 Difference]: With dead ends: 42944 [2020-07-20 12:36:53,239 INFO L226 Difference]: Without dead ends: 28989 [2020-07-20 12:36:53,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:36:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28989 states. [2020-07-20 12:36:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28989 to 28941. [2020-07-20 12:36:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28941 states. [2020-07-20 12:36:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28941 states to 28941 states and 46387 transitions. [2020-07-20 12:36:54,552 INFO L78 Accepts]: Start accepts. Automaton has 28941 states and 46387 transitions. Word has length 490 [2020-07-20 12:36:54,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:36:54,553 INFO L479 AbstractCegarLoop]: Abstraction has 28941 states and 46387 transitions. [2020-07-20 12:36:54,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:36:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 28941 states and 46387 transitions. [2020-07-20 12:36:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 12:36:54,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:36:54,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:36:54,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:36:54,781 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:36:54,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:36:54,782 INFO L82 PathProgramCache]: Analyzing trace with hash 656055547, now seen corresponding path program 1 times [2020-07-20 12:36:54,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:36:54,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200988855] [2020-07-20 12:36:54,784 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 12:36:55,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:36:55,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 3117 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:36:55,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:36:55,609 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 12:36:55,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:36:55,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200988855] [2020-07-20 12:36:55,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:36:55,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:36:55,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154896801] [2020-07-20 12:36:55,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:36:55,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:36:55,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:36:55,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:36:55,611 INFO L87 Difference]: Start difference. First operand 28941 states and 46387 transitions. Second operand 4 states. [2020-07-20 12:36:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:36:57,416 INFO L93 Difference]: Finished difference Result 81921 states and 130751 transitions. [2020-07-20 12:36:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:36:57,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-20 12:36:57,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:36:57,508 INFO L225 Difference]: With dead ends: 81921 [2020-07-20 12:36:57,509 INFO L226 Difference]: Without dead ends: 55260 [2020-07-20 12:36:57,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 487 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 12:36:57,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55260 states. [2020-07-20 12:36:59,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55260 to 30234. [2020-07-20 12:36:59,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30234 states. [2020-07-20 12:37:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30234 states to 30234 states and 48666 transitions. [2020-07-20 12:37:00,038 INFO L78 Accepts]: Start accepts. Automaton has 30234 states and 48666 transitions. Word has length 490 [2020-07-20 12:37:00,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:37:00,038 INFO L479 AbstractCegarLoop]: Abstraction has 30234 states and 48666 transitions. [2020-07-20 12:37:00,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:37:00,038 INFO L276 IsEmpty]: Start isEmpty. Operand 30234 states and 48666 transitions. [2020-07-20 12:37:00,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 12:37:00,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:37:00,067 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:37:00,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:00,282 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:37:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:37:00,283 INFO L82 PathProgramCache]: Analyzing trace with hash 12438715, now seen corresponding path program 1 times [2020-07-20 12:37:00,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:37:00,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67025248] [2020-07-20 12:37:00,285 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 12:37:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:37:00,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 3137 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:37:00,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:37:01,248 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 12:37:01,249 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:37:01,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67025248] [2020-07-20 12:37:01,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:37:01,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:37:01,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556126680] [2020-07-20 12:37:01,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:37:01,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:37:01,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:37:01,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:37:01,251 INFO L87 Difference]: Start difference. First operand 30234 states and 48666 transitions. Second operand 8 states. [2020-07-20 12:37:06,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:37:06,230 INFO L93 Difference]: Finished difference Result 65137 states and 104563 transitions. [2020-07-20 12:37:06,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:37:06,230 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 492 [2020-07-20 12:37:06,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:37:06,305 INFO L225 Difference]: With dead ends: 65137 [2020-07-20 12:37:06,305 INFO L226 Difference]: Without dead ends: 55924 [2020-07-20 12:37:06,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 485 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 12:37:06,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55924 states. [2020-07-20 12:37:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55924 to 36110. [2020-07-20 12:37:07,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36110 states. [2020-07-20 12:37:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36110 states to 36110 states and 57922 transitions. [2020-07-20 12:37:07,890 INFO L78 Accepts]: Start accepts. Automaton has 36110 states and 57922 transitions. Word has length 492 [2020-07-20 12:37:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:37:07,891 INFO L479 AbstractCegarLoop]: Abstraction has 36110 states and 57922 transitions. [2020-07-20 12:37:07,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:37:07,891 INFO L276 IsEmpty]: Start isEmpty. Operand 36110 states and 57922 transitions. [2020-07-20 12:37:07,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 12:37:07,928 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:37:07,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:37:08,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:08,143 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:37:08,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:37:08,144 INFO L82 PathProgramCache]: Analyzing trace with hash -520305017, now seen corresponding path program 1 times [2020-07-20 12:37:08,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:37:08,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103937254] [2020-07-20 12:37:08,145 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 12:37:09,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:37:09,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 3125 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:37:09,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:37:09,259 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 12:37:09,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:37:09,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103937254] [2020-07-20 12:37:09,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:37:09,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:37:09,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066944074] [2020-07-20 12:37:09,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:37:09,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:37:09,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:37:09,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:37:09,264 INFO L87 Difference]: Start difference. First operand 36110 states and 57922 transitions. Second operand 3 states. [2020-07-20 12:37:12,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:37:12,451 INFO L93 Difference]: Finished difference Result 72850 states and 115987 transitions. [2020-07-20 12:37:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:37:12,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-20 12:37:12,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:37:12,509 INFO L225 Difference]: With dead ends: 72850 [2020-07-20 12:37:12,510 INFO L226 Difference]: Without dead ends: 47345 [2020-07-20 12:37:12,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:37:12,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47345 states. [2020-07-20 12:37:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47345 to 42606. [2020-07-20 12:37:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42606 states. [2020-07-20 12:37:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42606 states to 42606 states and 68446 transitions. [2020-07-20 12:37:14,410 INFO L78 Accepts]: Start accepts. Automaton has 42606 states and 68446 transitions. Word has length 492 [2020-07-20 12:37:14,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:37:14,410 INFO L479 AbstractCegarLoop]: Abstraction has 42606 states and 68446 transitions. [2020-07-20 12:37:14,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:37:14,410 INFO L276 IsEmpty]: Start isEmpty. Operand 42606 states and 68446 transitions. [2020-07-20 12:37:14,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 12:37:14,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:37:14,435 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 12:37:14,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:14,636 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:37:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:37:14,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1733524636, now seen corresponding path program 1 times [2020-07-20 12:37:14,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:37:14,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395686944] [2020-07-20 12:37:14,638 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 12:37:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:37:15,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 3127 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:37:15,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:37:15,690 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 12:37:15,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:37:15,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395686944] [2020-07-20 12:37:15,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:37:15,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 12:37:15,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499514837] [2020-07-20 12:37:15,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 12:37:15,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:37:15,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 12:37:15,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:37:15,693 INFO L87 Difference]: Start difference. First operand 42606 states and 68446 transitions. Second operand 5 states. [2020-07-20 12:37:18,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:37:18,280 INFO L93 Difference]: Finished difference Result 75455 states and 120163 transitions. [2020-07-20 12:37:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 12:37:18,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-07-20 12:37:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:37:18,364 INFO L225 Difference]: With dead ends: 75455 [2020-07-20 12:37:18,365 INFO L226 Difference]: Without dead ends: 42606 [2020-07-20 12:37:18,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 489 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 12:37:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42606 states. [2020-07-20 12:37:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42606 to 42606. [2020-07-20 12:37:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42606 states. [2020-07-20 12:37:20,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42606 states to 42606 states and 67950 transitions. [2020-07-20 12:37:20,735 INFO L78 Accepts]: Start accepts. Automaton has 42606 states and 67950 transitions. Word has length 493 [2020-07-20 12:37:20,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:37:20,736 INFO L479 AbstractCegarLoop]: Abstraction has 42606 states and 67950 transitions. [2020-07-20 12:37:20,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 12:37:20,736 INFO L276 IsEmpty]: Start isEmpty. Operand 42606 states and 67950 transitions. [2020-07-20 12:37:20,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 12:37:20,762 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:37:20,762 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 12:37:20,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:20,971 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:37:20,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:37:20,972 INFO L82 PathProgramCache]: Analyzing trace with hash -128473503, now seen corresponding path program 1 times [2020-07-20 12:37:20,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:37:20,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440087125] [2020-07-20 12:37:20,973 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 12:37:21,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:37:21,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 3128 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:37:21,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:37:21,895 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 12:37:21,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:37:21,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440087125] [2020-07-20 12:37:21,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:37:21,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:37:21,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329129771] [2020-07-20 12:37:21,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:37:21,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:37:21,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:37:21,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:37:21,897 INFO L87 Difference]: Start difference. First operand 42606 states and 67950 transitions. Second operand 4 states. [2020-07-20 12:37:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:37:24,324 INFO L93 Difference]: Finished difference Result 88228 states and 140837 transitions. [2020-07-20 12:37:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:37:24,325 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-20 12:37:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:37:24,400 INFO L225 Difference]: With dead ends: 88228 [2020-07-20 12:37:24,400 INFO L226 Difference]: Without dead ends: 47109 [2020-07-20 12:37:24,451 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 12:37:24,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47109 states. [2020-07-20 12:37:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47109 to 42589. [2020-07-20 12:37:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42589 states. [2020-07-20 12:37:28,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42589 states to 42589 states and 67863 transitions. [2020-07-20 12:37:28,110 INFO L78 Accepts]: Start accepts. Automaton has 42589 states and 67863 transitions. Word has length 493 [2020-07-20 12:37:28,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:37:28,110 INFO L479 AbstractCegarLoop]: Abstraction has 42589 states and 67863 transitions. [2020-07-20 12:37:28,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:37:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 42589 states and 67863 transitions. [2020-07-20 12:37:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-20 12:37:28,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:37:28,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:37:28,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:28,337 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:37:28,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:37:28,341 INFO L82 PathProgramCache]: Analyzing trace with hash 905972161, now seen corresponding path program 1 times [2020-07-20 12:37:28,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:37:28,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169466655] [2020-07-20 12:37:28,341 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 12:37:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:37:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 3128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:37:29,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:37:29,144 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 12:37:29,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:37:29,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169466655] [2020-07-20 12:37:29,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:37:29,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:37:29,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908040626] [2020-07-20 12:37:29,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:37:29,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:37:29,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:37:29,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:37:29,146 INFO L87 Difference]: Start difference. First operand 42589 states and 67863 transitions. Second operand 3 states. [2020-07-20 12:37:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:37:32,399 INFO L93 Difference]: Finished difference Result 95820 states and 152107 transitions. [2020-07-20 12:37:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:37:32,399 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 494 [2020-07-20 12:37:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:37:32,510 INFO L225 Difference]: With dead ends: 95820 [2020-07-20 12:37:32,510 INFO L226 Difference]: Without dead ends: 64211 [2020-07-20 12:37:32,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:37:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64211 states. [2020-07-20 12:37:35,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64211 to 58385. [2020-07-20 12:37:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58385 states. [2020-07-20 12:37:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58385 states to 58385 states and 93073 transitions. [2020-07-20 12:37:35,890 INFO L78 Accepts]: Start accepts. Automaton has 58385 states and 93073 transitions. Word has length 494 [2020-07-20 12:37:35,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:37:35,890 INFO L479 AbstractCegarLoop]: Abstraction has 58385 states and 93073 transitions. [2020-07-20 12:37:35,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:37:35,891 INFO L276 IsEmpty]: Start isEmpty. Operand 58385 states and 93073 transitions. [2020-07-20 12:37:35,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-20 12:37:35,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:37:35,929 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 12:37:36,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:36,145 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:37:36,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:37:36,146 INFO L82 PathProgramCache]: Analyzing trace with hash -581287731, now seen corresponding path program 1 times [2020-07-20 12:37:36,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:37:36,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205759489] [2020-07-20 12:37:36,147 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 12:37:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:37:36,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 3131 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:37:36,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:37:37,352 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 12:37:37,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:37:37,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205759489] [2020-07-20 12:37:37,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:37:37,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:37:37,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636137640] [2020-07-20 12:37:37,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:37:37,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:37:37,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:37:37,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:37:37,354 INFO L87 Difference]: Start difference. First operand 58385 states and 93073 transitions. Second operand 4 states. [2020-07-20 12:37:44,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:37:44,830 INFO L93 Difference]: Finished difference Result 172553 states and 275216 transitions. [2020-07-20 12:37:44,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:37:44,831 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-07-20 12:37:44,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:37:44,978 INFO L225 Difference]: With dead ends: 172553 [2020-07-20 12:37:44,978 INFO L226 Difference]: Without dead ends: 114863 [2020-07-20 12:37:45,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 492 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 12:37:45,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114863 states. [2020-07-20 12:37:51,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114863 to 114833. [2020-07-20 12:37:51,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114833 states. [2020-07-20 12:37:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114833 states to 114833 states and 182653 transitions. [2020-07-20 12:37:51,795 INFO L78 Accepts]: Start accepts. Automaton has 114833 states and 182653 transitions. Word has length 495 [2020-07-20 12:37:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:37:51,796 INFO L479 AbstractCegarLoop]: Abstraction has 114833 states and 182653 transitions. [2020-07-20 12:37:51,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:37:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 114833 states and 182653 transitions. [2020-07-20 12:37:51,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-20 12:37:51,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:37:51,842 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 12:37:52,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:37:52,043 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:37:52,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:37:52,044 INFO L82 PathProgramCache]: Analyzing trace with hash 232421937, now seen corresponding path program 1 times [2020-07-20 12:37:52,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:37:52,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439463645] [2020-07-20 12:37:52,045 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 12:37:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:37:52,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 3134 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:37:52,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:37:54,756 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 12:37:54,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:37:54,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439463645] [2020-07-20 12:37:54,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:37:54,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:37:54,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228941897] [2020-07-20 12:37:54,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:37:54,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:37:54,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:37:54,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:37:54,759 INFO L87 Difference]: Start difference. First operand 114833 states and 182653 transitions. Second operand 3 states. [2020-07-20 12:38:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:38:07,130 INFO L93 Difference]: Finished difference Result 339057 states and 539788 transitions. [2020-07-20 12:38:07,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:38:07,130 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-20 12:38:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:38:07,433 INFO L225 Difference]: With dead ends: 339057 [2020-07-20 12:38:07,434 INFO L226 Difference]: Without dead ends: 225820 [2020-07-20 12:38:07,529 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 12:38:07,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225820 states. [2020-07-20 12:38:26,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225820 to 225787. [2020-07-20 12:38:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225787 states. [2020-07-20 12:38:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225787 states to 225787 states and 358509 transitions. [2020-07-20 12:38:27,322 INFO L78 Accepts]: Start accepts. Automaton has 225787 states and 358509 transitions. Word has length 497 [2020-07-20 12:38:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:38:27,322 INFO L479 AbstractCegarLoop]: Abstraction has 225787 states and 358509 transitions. [2020-07-20 12:38:27,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:38:27,323 INFO L276 IsEmpty]: Start isEmpty. Operand 225787 states and 358509 transitions. [2020-07-20 12:38:27,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 12:38:27,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:38:27,417 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 12:38:27,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:38:27,618 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:38:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:38:27,619 INFO L82 PathProgramCache]: Analyzing trace with hash -180504028, now seen corresponding path program 1 times [2020-07-20 12:38:27,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:38:27,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373624312] [2020-07-20 12:38:27,621 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 12:38:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:38:28,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 3136 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:38:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:38:28,408 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 12:38:28,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:38:28,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373624312] [2020-07-20 12:38:28,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:38:28,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:38:28,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222150058] [2020-07-20 12:38:28,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:38:28,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:38:28,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:38:28,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:38:28,411 INFO L87 Difference]: Start difference. First operand 225787 states and 358509 transitions. Second operand 3 states. [2020-07-20 12:38:59,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:38:59,399 INFO L93 Difference]: Finished difference Result 674972 states and 1071609 transitions. [2020-07-20 12:38:59,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:38:59,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-20 12:38:59,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:39:00,146 INFO L225 Difference]: With dead ends: 674972 [2020-07-20 12:39:00,146 INFO L226 Difference]: Without dead ends: 450057 [2020-07-20 12:39:00,383 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 12:39:00,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450057 states. [2020-07-20 12:39:24,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450057 to 226027. [2020-07-20 12:39:24,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226027 states. [2020-07-20 12:39:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226027 states to 226027 states and 358871 transitions. [2020-07-20 12:39:24,953 INFO L78 Accepts]: Start accepts. Automaton has 226027 states and 358871 transitions. Word has length 498 [2020-07-20 12:39:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:39:24,953 INFO L479 AbstractCegarLoop]: Abstraction has 226027 states and 358871 transitions. [2020-07-20 12:39:24,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:39:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 226027 states and 358871 transitions. [2020-07-20 12:39:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 12:39:25,044 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:39:25,045 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 12:39:25,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:39:25,245 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:39:25,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:39:25,246 INFO L82 PathProgramCache]: Analyzing trace with hash 944292662, now seen corresponding path program 1 times [2020-07-20 12:39:25,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:39:25,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350598236] [2020-07-20 12:39:25,247 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 12:39:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:39:25,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 3137 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:39:25,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:39:26,120 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 12:39:26,121 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:39:26,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350598236] [2020-07-20 12:39:26,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:39:26,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:39:26,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248500782] [2020-07-20 12:39:26,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:39:26,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:39:26,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:39:26,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:39:26,123 INFO L87 Difference]: Start difference. First operand 226027 states and 358871 transitions. Second operand 3 states. [2020-07-20 12:39:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:39:58,459 INFO L93 Difference]: Finished difference Result 669977 states and 1063881 transitions. [2020-07-20 12:39:58,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:39:58,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 12:39:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:39:59,081 INFO L225 Difference]: With dead ends: 669977 [2020-07-20 12:39:59,081 INFO L226 Difference]: Without dead ends: 445875 [2020-07-20 12:39:59,281 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 12:39:59,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445875 states. [2020-07-20 12:40:43,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445875 to 445847. [2020-07-20 12:40:43,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445847 states. [2020-07-20 12:40:44,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445847 states to 445847 states and 705889 transitions. [2020-07-20 12:40:44,559 INFO L78 Accepts]: Start accepts. Automaton has 445847 states and 705889 transitions. Word has length 499 [2020-07-20 12:40:44,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:44,559 INFO L479 AbstractCegarLoop]: Abstraction has 445847 states and 705889 transitions. [2020-07-20 12:40:44,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:44,559 INFO L276 IsEmpty]: Start isEmpty. Operand 445847 states and 705889 transitions. [2020-07-20 12:40:44,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 12:40:44,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:44,766 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 12:40:44,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:44,967 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:44,967 INFO L82 PathProgramCache]: Analyzing trace with hash -312371439, now seen corresponding path program 1 times [2020-07-20 12:40:44,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:44,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152463806] [2020-07-20 12:40:44,969 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 12:40:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:46,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 3139 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:46,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:46,450 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 12:40:46,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:46,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152463806] [2020-07-20 12:40:46,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:46,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:46,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693736367] [2020-07-20 12:40:46,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:46,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:46,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:46,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:46,452 INFO L87 Difference]: Start difference. First operand 445847 states and 705889 transitions. Second operand 3 states. [2020-07-20 12:42:02,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:42:02,682 INFO L93 Difference]: Finished difference Result 1335070 states and 2113676 transitions. [2020-07-20 12:42:02,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:42:02,683 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 12:42:02,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:42:04,080 INFO L225 Difference]: With dead ends: 1335070 [2020-07-20 12:42:04,080 INFO L226 Difference]: Without dead ends: 890313 [2020-07-20 12:42:04,424 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 12:42:05,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890313 states. [2020-07-20 12:42:54,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890313 to 446654. [2020-07-20 12:42:54,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446654 states. [2020-07-20 12:42:55,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446654 states to 446654 states and 707092 transitions. [2020-07-20 12:42:55,320 INFO L78 Accepts]: Start accepts. Automaton has 446654 states and 707092 transitions. Word has length 499 [2020-07-20 12:42:55,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:42:55,320 INFO L479 AbstractCegarLoop]: Abstraction has 446654 states and 707092 transitions. [2020-07-20 12:42:55,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:42:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 446654 states and 707092 transitions. [2020-07-20 12:42:55,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 12:42:55,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:42:55,508 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] [2020-07-20 12:42:55,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:42:55,709 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:42:55,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:42:55,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1741583693, now seen corresponding path program 1 times [2020-07-20 12:42:55,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:42:55,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216960637] [2020-07-20 12:42:55,711 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 12:42:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:42:56,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 3140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:42:56,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:42:56,517 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 12:42:56,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:42:56,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216960637] [2020-07-20 12:42:56,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:42:56,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:42:56,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762449990] [2020-07-20 12:42:56,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:42:56,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:42:56,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:42:56,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:42:56,519 INFO L87 Difference]: Start difference. First operand 446654 states and 707092 transitions. Second operand 3 states. [2020-07-20 12:44:11,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:44:11,269 INFO L93 Difference]: Finished difference Result 1335504 states and 2114028 transitions. [2020-07-20 12:44:11,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:44:11,270 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-20 12:44:11,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:44:12,764 INFO L225 Difference]: With dead ends: 1335504 [2020-07-20 12:44:12,764 INFO L226 Difference]: Without dead ends: 890819 [2020-07-20 12:44:13,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 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 12:44:13,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890819 states. [2020-07-20 12:45:11,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890819 to 447842. [2020-07-20 12:45:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447842 states. [2020-07-20 12:45:12,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447842 states to 447842 states and 708640 transitions. [2020-07-20 12:45:12,474 INFO L78 Accepts]: Start accepts. Automaton has 447842 states and 708640 transitions. Word has length 500 [2020-07-20 12:45:12,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:45:12,474 INFO L479 AbstractCegarLoop]: Abstraction has 447842 states and 708640 transitions. [2020-07-20 12:45:12,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:45:12,474 INFO L276 IsEmpty]: Start isEmpty. Operand 447842 states and 708640 transitions. [2020-07-20 12:45:12,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 12:45:12,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:45:12,700 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 12:45:12,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:45:12,901 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:45:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:45:12,902 INFO L82 PathProgramCache]: Analyzing trace with hash -619186825, now seen corresponding path program 1 times [2020-07-20 12:45:12,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:45:12,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055173875] [2020-07-20 12:45:12,903 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 12:45:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:45:14,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 3154 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:45:14,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:45:14,969 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 12:45:14,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:45:14,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055173875] [2020-07-20 12:45:14,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:45:14,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:45:14,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541513352] [2020-07-20 12:45:14,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:45:14,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:45:14,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:45:14,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:45:14,971 INFO L87 Difference]: Start difference. First operand 447842 states and 708640 transitions. Second operand 8 states. [2020-07-20 12:47:24,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:47:24,406 INFO L93 Difference]: Finished difference Result 1579702 states and 2500794 transitions. [2020-07-20 12:47:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:47:24,406 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 501 [2020-07-20 12:47:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:47:26,606 INFO L225 Difference]: With dead ends: 1579702 [2020-07-20 12:47:26,606 INFO L226 Difference]: Without dead ends: 1215581 [2020-07-20 12:47:27,058 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 12:47:28,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215581 states.