/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_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:20:13,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:20:13,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:20:13,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:20:13,102 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:20:13,104 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:20:13,105 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:20:13,117 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:20:13,120 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:20:13,124 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:20:13,125 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:20:13,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:20:13,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:20:13,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:20:13,131 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:20:13,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:20:13,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:20:13,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:20:13,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:20:13,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:20:13,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:20:13,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:20:13,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:20:13,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:20:13,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:20:13,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:20:13,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:20:13,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:20:13,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:20:13,201 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:20:13,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:20:13,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:20:13,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:20:13,203 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:20:13,203 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:20:13,203 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:20:13,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:20:13,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:20:13,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:20:13,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:20:13,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:20:13,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:20:13,204 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:20:13,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:20:13,205 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:20:13,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:20:13,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:20:13,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:20:13,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:20:13,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:20:13,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:20:13,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:20:13,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:20:13,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:20:13,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:20:13,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:13,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:20:13,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:20:13,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 12:20:13,499 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:20:13,512 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:20:13,515 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:20:13,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:20:13,517 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:20:13,518 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 12:20:13,575 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81605003f/1806db6d582e48a7b2cc19472e3b6316/FLAGd2412683d [2020-07-21 12:20:14,276 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:20:14,277 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 12:20:14,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81605003f/1806db6d582e48a7b2cc19472e3b6316/FLAGd2412683d [2020-07-21 12:20:14,412 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81605003f/1806db6d582e48a7b2cc19472e3b6316 [2020-07-21 12:20:14,422 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:20:14,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:20:14,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:20:14,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:20:14,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:20:14,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:20:14" (1/1) ... [2020-07-21 12:20:14,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@325a23a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:14, skipping insertion in model container [2020-07-21 12:20:14,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:20:14" (1/1) ... [2020-07-21 12:20:14,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:20:14,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:20:17,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:20:17,046 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:20:18,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:20:18,918 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:20:18,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:18 WrapperNode [2020-07-21 12:20:18,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:20:18,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:20:18,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:20:18,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:20:18,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:18" (1/1) ... [2020-07-21 12:20:18,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:18" (1/1) ... [2020-07-21 12:20:18,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:18" (1/1) ... [2020-07-21 12:20:18,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:18" (1/1) ... [2020-07-21 12:20:19,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:18" (1/1) ... [2020-07-21 12:20:19,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:18" (1/1) ... [2020-07-21 12:20:19,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:18" (1/1) ... [2020-07-21 12:20:19,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:20:19,172 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:20:19,172 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:20:19,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:20:19,173 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:20:19,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:20:19,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:20:19,239 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:20:19,239 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:20:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:20:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:20:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:20:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:20:19,240 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:20:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:20:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:20:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:20:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:20:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:20:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:20:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:20:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 12:20:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:20:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:20:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:20:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:20:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:20:24,495 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:20:24,495 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:20:24,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:20:24 BoogieIcfgContainer [2020-07-21 12:20:24,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:20:24,517 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:20:24,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:20:24,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:20:24,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:20:14" (1/3) ... [2020-07-21 12:20:24,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b443297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:20:24, skipping insertion in model container [2020-07-21 12:20:24,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:20:18" (2/3) ... [2020-07-21 12:20:24,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b443297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:20:24, skipping insertion in model container [2020-07-21 12:20:24,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:20:24" (3/3) ... [2020-07-21 12:20:24,526 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2020-07-21 12:20:24,537 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:20:24,551 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 12:20:24,570 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 12:20:24,608 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:20:24,608 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:20:24,608 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:20:24,609 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:20:24,609 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:20:24,609 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:20:24,609 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:20:24,609 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:20:24,663 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2020-07-21 12:20:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-07-21 12:20:24,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:24,710 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] [2020-07-21 12:20:24,711 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:24,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:24,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2040294362, now seen corresponding path program 1 times [2020-07-21 12:20:24,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:24,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607433785] [2020-07-21 12:20:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:25,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 2791 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:20:25,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:25,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:25,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607433785] [2020-07-21 12:20:25,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:25,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:20:25,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156032370] [2020-07-21 12:20:25,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:20:25,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:25,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:20:25,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:25,526 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 3 states. [2020-07-21 12:20:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:25,861 INFO L93 Difference]: Finished difference Result 5239 states and 9112 transitions. [2020-07-21 12:20:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:25,864 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 290 [2020-07-21 12:20:25,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:25,900 INFO L225 Difference]: With dead ends: 5239 [2020-07-21 12:20:25,900 INFO L226 Difference]: Without dead ends: 3731 [2020-07-21 12:20:25,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2020-07-21 12:20:26,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3639. [2020-07-21 12:20:26,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3639 states. [2020-07-21 12:20:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 6317 transitions. [2020-07-21 12:20:26,181 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 6317 transitions. Word has length 290 [2020-07-21 12:20:26,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:26,182 INFO L479 AbstractCegarLoop]: Abstraction has 3639 states and 6317 transitions. [2020-07-21 12:20:26,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:20:26,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 6317 transitions. [2020-07-21 12:20:26,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-07-21 12:20:26,197 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:26,197 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] [2020-07-21 12:20:26,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:26,412 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:26,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:26,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1843682222, now seen corresponding path program 1 times [2020-07-21 12:20:26,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:26,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085003665] [2020-07-21 12:20:26,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:26,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2827 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:20:26,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:26,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:26,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085003665] [2020-07-21 12:20:26,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:26,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:20:26,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431543865] [2020-07-21 12:20:26,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:20:26,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:26,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:20:26,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:26,998 INFO L87 Difference]: Start difference. First operand 3639 states and 6317 transitions. Second operand 3 states. [2020-07-21 12:20:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:27,270 INFO L93 Difference]: Finished difference Result 8964 states and 15468 transitions. [2020-07-21 12:20:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:27,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 306 [2020-07-21 12:20:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:27,304 INFO L225 Difference]: With dead ends: 8964 [2020-07-21 12:20:27,304 INFO L226 Difference]: Without dead ends: 6275 [2020-07-21 12:20:27,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:27,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6275 states. [2020-07-21 12:20:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6275 to 6095. [2020-07-21 12:20:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6095 states. [2020-07-21 12:20:27,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6095 states to 6095 states and 10517 transitions. [2020-07-21 12:20:27,595 INFO L78 Accepts]: Start accepts. Automaton has 6095 states and 10517 transitions. Word has length 306 [2020-07-21 12:20:27,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:27,596 INFO L479 AbstractCegarLoop]: Abstraction has 6095 states and 10517 transitions. [2020-07-21 12:20:27,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:20:27,597 INFO L276 IsEmpty]: Start isEmpty. Operand 6095 states and 10517 transitions. [2020-07-21 12:20:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 12:20:27,620 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:27,621 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] [2020-07-21 12:20:27,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:27,834 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:27,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:27,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1324908022, now seen corresponding path program 1 times [2020-07-21 12:20:27,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:27,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819617910] [2020-07-21 12:20:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 2863 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:20:28,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:28,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:28,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819617910] [2020-07-21 12:20:28,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:28,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:20:28,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080271169] [2020-07-21 12:20:28,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:20:28,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:28,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:20:28,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:28,378 INFO L87 Difference]: Start difference. First operand 6095 states and 10517 transitions. Second operand 3 states. [2020-07-21 12:20:28,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:28,636 INFO L93 Difference]: Finished difference Result 10668 states and 18342 transitions. [2020-07-21 12:20:28,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:28,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 322 [2020-07-21 12:20:28,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:28,666 INFO L225 Difference]: With dead ends: 10668 [2020-07-21 12:20:28,666 INFO L226 Difference]: Without dead ends: 6099 [2020-07-21 12:20:28,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:28,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6099 states. [2020-07-21 12:20:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6099 to 6095. [2020-07-21 12:20:28,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6095 states. [2020-07-21 12:20:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6095 states to 6095 states and 10501 transitions. [2020-07-21 12:20:28,925 INFO L78 Accepts]: Start accepts. Automaton has 6095 states and 10501 transitions. Word has length 322 [2020-07-21 12:20:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:28,925 INFO L479 AbstractCegarLoop]: Abstraction has 6095 states and 10501 transitions. [2020-07-21 12:20:28,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:20:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand 6095 states and 10501 transitions. [2020-07-21 12:20:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-07-21 12:20:28,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:28,952 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] [2020-07-21 12:20:29,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:29,168 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:29,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1105393530, now seen corresponding path program 1 times [2020-07-21 12:20:29,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:29,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762072425] [2020-07-21 12:20:29,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:29,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 2863 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:20:29,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:29,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:29,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762072425] [2020-07-21 12:20:29,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:29,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:20:29,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418400470] [2020-07-21 12:20:29,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:20:29,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:29,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:20:29,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:29,712 INFO L87 Difference]: Start difference. First operand 6095 states and 10501 transitions. Second operand 3 states. [2020-07-21 12:20:30,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:30,039 INFO L93 Difference]: Finished difference Result 15475 states and 26595 transitions. [2020-07-21 12:20:30,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:30,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 322 [2020-07-21 12:20:30,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:30,088 INFO L225 Difference]: With dead ends: 15475 [2020-07-21 12:20:30,089 INFO L226 Difference]: Without dead ends: 10699 [2020-07-21 12:20:30,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:30,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10699 states. [2020-07-21 12:20:30,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10699 to 10343. [2020-07-21 12:20:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10343 states. [2020-07-21 12:20:30,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 17741 transitions. [2020-07-21 12:20:30,497 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 17741 transitions. Word has length 322 [2020-07-21 12:20:30,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:30,498 INFO L479 AbstractCegarLoop]: Abstraction has 10343 states and 17741 transitions. [2020-07-21 12:20:30,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:20:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 17741 transitions. [2020-07-21 12:20:30,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 12:20:30,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:30,528 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] [2020-07-21 12:20:30,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:30,742 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:30,742 INFO L82 PathProgramCache]: Analyzing trace with hash 510046414, now seen corresponding path program 1 times [2020-07-21 12:20:30,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:30,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170614223] [2020-07-21 12:20:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:31,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:20:31,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:31,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:31,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:31,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170614223] [2020-07-21 12:20:31,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:31,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:20:31,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955387274] [2020-07-21 12:20:31,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:20:31,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:31,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:20:31,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:31,347 INFO L87 Difference]: Start difference. First operand 10343 states and 17741 transitions. Second operand 3 states. [2020-07-21 12:20:31,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:31,837 INFO L93 Difference]: Finished difference Result 26571 states and 45577 transitions. [2020-07-21 12:20:31,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:31,838 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 12:20:31,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:31,884 INFO L225 Difference]: With dead ends: 26571 [2020-07-21 12:20:31,885 INFO L226 Difference]: Without dead ends: 18219 [2020-07-21 12:20:31,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18219 states. [2020-07-21 12:20:32,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18219 to 17511. [2020-07-21 12:20:32,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17511 states. [2020-07-21 12:20:32,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17511 states to 17511 states and 29933 transitions. [2020-07-21 12:20:32,358 INFO L78 Accepts]: Start accepts. Automaton has 17511 states and 29933 transitions. Word has length 338 [2020-07-21 12:20:32,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:32,358 INFO L479 AbstractCegarLoop]: Abstraction has 17511 states and 29933 transitions. [2020-07-21 12:20:32,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:20:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 17511 states and 29933 transitions. [2020-07-21 12:20:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-21 12:20:32,408 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:32,408 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] [2020-07-21 12:20:32,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:32,623 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:32,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:32,623 INFO L82 PathProgramCache]: Analyzing trace with hash 782714454, now seen corresponding path program 1 times [2020-07-21 12:20:32,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:32,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628200460] [2020-07-21 12:20:32,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:33,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 2935 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:20:33,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:33,292 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:33,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628200460] [2020-07-21 12:20:33,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:33,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:20:33,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14984694] [2020-07-21 12:20:33,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:20:33,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:33,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:20:33,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:33,295 INFO L87 Difference]: Start difference. First operand 17511 states and 29933 transitions. Second operand 3 states. [2020-07-21 12:20:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:33,745 INFO L93 Difference]: Finished difference Result 31259 states and 53385 transitions. [2020-07-21 12:20:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:33,746 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 354 [2020-07-21 12:20:33,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:33,793 INFO L225 Difference]: With dead ends: 31259 [2020-07-21 12:20:33,794 INFO L226 Difference]: Without dead ends: 17515 [2020-07-21 12:20:33,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17515 states. [2020-07-21 12:20:34,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17515 to 17511. [2020-07-21 12:20:34,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17511 states. [2020-07-21 12:20:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17511 states to 17511 states and 29869 transitions. [2020-07-21 12:20:34,368 INFO L78 Accepts]: Start accepts. Automaton has 17511 states and 29869 transitions. Word has length 354 [2020-07-21 12:20:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:34,369 INFO L479 AbstractCegarLoop]: Abstraction has 17511 states and 29869 transitions. [2020-07-21 12:20:34,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:20:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 17511 states and 29869 transitions. [2020-07-21 12:20:35,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-07-21 12:20:35,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:35,246 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] [2020-07-21 12:20:35,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:35,462 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:35,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:35,462 INFO L82 PathProgramCache]: Analyzing trace with hash 583140582, now seen corresponding path program 1 times [2020-07-21 12:20:35,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:35,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300407955] [2020-07-21 12:20:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:35,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:35,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 2935 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:20:35,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:36,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:36,019 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:36,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300407955] [2020-07-21 12:20:36,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:36,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:20:36,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331442441] [2020-07-21 12:20:36,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:20:36,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:36,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:20:36,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:36,021 INFO L87 Difference]: Start difference. First operand 17511 states and 29869 transitions. Second operand 3 states. [2020-07-21 12:20:36,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:36,609 INFO L93 Difference]: Finished difference Result 44911 states and 76721 transitions. [2020-07-21 12:20:36,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:36,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 354 [2020-07-21 12:20:36,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:36,686 INFO L225 Difference]: With dead ends: 44911 [2020-07-21 12:20:36,687 INFO L226 Difference]: Without dead ends: 30603 [2020-07-21 12:20:36,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 352 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:36,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30603 states. [2020-07-21 12:20:37,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30603 to 29191. [2020-07-21 12:20:37,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29191 states. [2020-07-21 12:20:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29191 states to 29191 states and 49613 transitions. [2020-07-21 12:20:37,572 INFO L78 Accepts]: Start accepts. Automaton has 29191 states and 49613 transitions. Word has length 354 [2020-07-21 12:20:37,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:37,572 INFO L479 AbstractCegarLoop]: Abstraction has 29191 states and 49613 transitions. [2020-07-21 12:20:37,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:20:37,573 INFO L276 IsEmpty]: Start isEmpty. Operand 29191 states and 49613 transitions. [2020-07-21 12:20:37,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-07-21 12:20:37,601 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:37,602 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] [2020-07-21 12:20:37,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:37,803 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:37,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:37,804 INFO L82 PathProgramCache]: Analyzing trace with hash 500157934, now seen corresponding path program 1 times [2020-07-21 12:20:37,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:37,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942432009] [2020-07-21 12:20:37,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:38,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 2971 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:20:38,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:38,513 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:38,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942432009] [2020-07-21 12:20:38,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:38,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:20:38,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570958311] [2020-07-21 12:20:38,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:20:38,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:38,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:20:38,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:20:38,516 INFO L87 Difference]: Start difference. First operand 29191 states and 49613 transitions. Second operand 4 states. [2020-07-21 12:20:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:39,068 INFO L93 Difference]: Finished difference Result 57836 states and 98200 transitions. [2020-07-21 12:20:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:20:39,068 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 370 [2020-07-21 12:20:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:39,120 INFO L225 Difference]: With dead ends: 57836 [2020-07-21 12:20:39,120 INFO L226 Difference]: Without dead ends: 29191 [2020-07-21 12:20:39,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:20:39,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29191 states. [2020-07-21 12:20:39,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29191 to 29191. [2020-07-21 12:20:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29191 states. [2020-07-21 12:20:40,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29191 states to 29191 states and 49553 transitions. [2020-07-21 12:20:40,012 INFO L78 Accepts]: Start accepts. Automaton has 29191 states and 49553 transitions. Word has length 370 [2020-07-21 12:20:40,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:40,013 INFO L479 AbstractCegarLoop]: Abstraction has 29191 states and 49553 transitions. [2020-07-21 12:20:40,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:20:40,013 INFO L276 IsEmpty]: Start isEmpty. Operand 29191 states and 49553 transitions. [2020-07-21 12:20:40,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-07-21 12:20:40,039 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:40,040 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] [2020-07-21 12:20:40,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:40,254 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:40,255 INFO L82 PathProgramCache]: Analyzing trace with hash 762488538, now seen corresponding path program 1 times [2020-07-21 12:20:40,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:40,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076544731] [2020-07-21 12:20:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:40,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 3054 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:20:40,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:40,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:40,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076544731] [2020-07-21 12:20:40,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:40,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:20:40,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964876870] [2020-07-21 12:20:40,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:20:40,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:40,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:20:40,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:40,873 INFO L87 Difference]: Start difference. First operand 29191 states and 49553 transitions. Second operand 3 states. [2020-07-21 12:20:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:42,032 INFO L93 Difference]: Finished difference Result 45081 states and 76537 transitions. [2020-07-21 12:20:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:42,034 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 429 [2020-07-21 12:20:42,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:42,076 INFO L225 Difference]: With dead ends: 45081 [2020-07-21 12:20:42,076 INFO L226 Difference]: Without dead ends: 29191 [2020-07-21 12:20:42,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:42,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29191 states. [2020-07-21 12:20:42,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29191 to 29191. [2020-07-21 12:20:42,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29191 states. [2020-07-21 12:20:42,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29191 states to 29191 states and 49551 transitions. [2020-07-21 12:20:42,711 INFO L78 Accepts]: Start accepts. Automaton has 29191 states and 49551 transitions. Word has length 429 [2020-07-21 12:20:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:42,712 INFO L479 AbstractCegarLoop]: Abstraction has 29191 states and 49551 transitions. [2020-07-21 12:20:42,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:20:42,712 INFO L276 IsEmpty]: Start isEmpty. Operand 29191 states and 49551 transitions. [2020-07-21 12:20:42,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-07-21 12:20:42,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:42,746 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] [2020-07-21 12:20:42,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:42,960 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:42,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:42,961 INFO L82 PathProgramCache]: Analyzing trace with hash 479350298, now seen corresponding path program 1 times [2020-07-21 12:20:42,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:42,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203103592] [2020-07-21 12:20:42,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:43,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 3054 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:20:43,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:43,712 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:43,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203103592] [2020-07-21 12:20:43,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:43,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:20:43,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717832857] [2020-07-21 12:20:43,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:20:43,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:43,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:20:43,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:43,714 INFO L87 Difference]: Start difference. First operand 29191 states and 49551 transitions. Second operand 3 states. [2020-07-21 12:20:44,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:44,101 INFO L93 Difference]: Finished difference Result 44883 states and 76193 transitions. [2020-07-21 12:20:44,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:44,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 429 [2020-07-21 12:20:44,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:44,137 INFO L225 Difference]: With dead ends: 44883 [2020-07-21 12:20:44,137 INFO L226 Difference]: Without dead ends: 29191 [2020-07-21 12:20:44,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 427 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29191 states. [2020-07-21 12:20:44,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29191 to 29191. [2020-07-21 12:20:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29191 states. [2020-07-21 12:20:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29191 states to 29191 states and 49543 transitions. [2020-07-21 12:20:44,768 INFO L78 Accepts]: Start accepts. Automaton has 29191 states and 49543 transitions. Word has length 429 [2020-07-21 12:20:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:44,769 INFO L479 AbstractCegarLoop]: Abstraction has 29191 states and 49543 transitions. [2020-07-21 12:20:44,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:20:44,769 INFO L276 IsEmpty]: Start isEmpty. Operand 29191 states and 49543 transitions. [2020-07-21 12:20:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-07-21 12:20:44,792 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:44,792 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] [2020-07-21 12:20:44,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:44,994 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:44,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1451758246, now seen corresponding path program 1 times [2020-07-21 12:20:44,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:44,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349209220] [2020-07-21 12:20:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:45,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:45,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 3054 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:20:45,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:45,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:45,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349209220] [2020-07-21 12:20:45,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:45,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:20:45,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411482733] [2020-07-21 12:20:45,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:20:45,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:45,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:20:45,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:20:45,941 INFO L87 Difference]: Start difference. First operand 29191 states and 49543 transitions. Second operand 7 states. [2020-07-21 12:20:51,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:51,302 INFO L93 Difference]: Finished difference Result 191424 states and 324479 transitions. [2020-07-21 12:20:51,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:20:51,302 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 429 [2020-07-21 12:20:51,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:51,458 INFO L225 Difference]: With dead ends: 191424 [2020-07-21 12:20:51,459 INFO L226 Difference]: Without dead ends: 164188 [2020-07-21 12:20:51,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 423 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:20:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164188 states. [2020-07-21 12:20:53,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164188 to 57645. [2020-07-21 12:20:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57645 states. [2020-07-21 12:20:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57645 states to 57645 states and 97223 transitions. [2020-07-21 12:20:53,751 INFO L78 Accepts]: Start accepts. Automaton has 57645 states and 97223 transitions. Word has length 429 [2020-07-21 12:20:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:20:53,751 INFO L479 AbstractCegarLoop]: Abstraction has 57645 states and 97223 transitions. [2020-07-21 12:20:53,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:20:53,752 INFO L276 IsEmpty]: Start isEmpty. Operand 57645 states and 97223 transitions. [2020-07-21 12:20:53,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2020-07-21 12:20:53,794 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:20:53,795 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] [2020-07-21 12:20:53,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:53,996 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:20:53,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:20:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash 808624041, now seen corresponding path program 1 times [2020-07-21 12:20:53,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:20:53,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72112309] [2020-07-21 12:20:53,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:20:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:20:54,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:20:54,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:20:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:20:54,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:20:54,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72112309] [2020-07-21 12:20:54,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:20:54,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:20:54,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996386831] [2020-07-21 12:20:54,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:20:54,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:20:54,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:20:54,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:20:54,940 INFO L87 Difference]: Start difference. First operand 57645 states and 97223 transitions. Second operand 7 states. [2020-07-21 12:21:01,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:01,431 INFO L93 Difference]: Finished difference Result 191232 states and 323583 transitions. [2020-07-21 12:21:01,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:21:01,431 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 430 [2020-07-21 12:21:01,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:01,591 INFO L225 Difference]: With dead ends: 191232 [2020-07-21 12:21:01,591 INFO L226 Difference]: Without dead ends: 164188 [2020-07-21 12:21:01,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:21:01,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164188 states. [2020-07-21 12:21:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164188 to 85229. [2020-07-21 12:21:04,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85229 states. [2020-07-21 12:21:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85229 states to 85229 states and 143714 transitions. [2020-07-21 12:21:04,669 INFO L78 Accepts]: Start accepts. Automaton has 85229 states and 143714 transitions. Word has length 430 [2020-07-21 12:21:04,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:04,670 INFO L479 AbstractCegarLoop]: Abstraction has 85229 states and 143714 transitions. [2020-07-21 12:21:04,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:21:04,670 INFO L276 IsEmpty]: Start isEmpty. Operand 85229 states and 143714 transitions. [2020-07-21 12:21:04,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2020-07-21 12:21:04,743 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:04,743 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] [2020-07-21 12:21:04,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:04,944 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:04,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:04,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1210615191, now seen corresponding path program 1 times [2020-07-21 12:21:04,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:04,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350181471] [2020-07-21 12:21:04,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:21:05,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:05,614 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:05,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350181471] [2020-07-21 12:21:05,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:05,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:21:05,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716932379] [2020-07-21 12:21:05,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:21:05,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:05,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:21:05,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:21:05,616 INFO L87 Difference]: Start difference. First operand 85229 states and 143714 transitions. Second operand 7 states. [2020-07-21 12:21:14,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:14,387 INFO L93 Difference]: Finished difference Result 218256 states and 369138 transitions. [2020-07-21 12:21:14,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:21:14,387 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 430 [2020-07-21 12:21:14,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:14,580 INFO L225 Difference]: With dead ends: 218256 [2020-07-21 12:21:14,580 INFO L226 Difference]: Without dead ends: 191772 [2020-07-21 12:21:14,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:21:14,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191772 states. [2020-07-21 12:21:18,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191772 to 112275. [2020-07-21 12:21:18,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112275 states. [2020-07-21 12:21:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112275 states to 112275 states and 189311 transitions. [2020-07-21 12:21:19,029 INFO L78 Accepts]: Start accepts. Automaton has 112275 states and 189311 transitions. Word has length 430 [2020-07-21 12:21:19,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:19,030 INFO L479 AbstractCegarLoop]: Abstraction has 112275 states and 189311 transitions. [2020-07-21 12:21:19,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:21:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 112275 states and 189311 transitions. [2020-07-21 12:21:19,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2020-07-21 12:21:19,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:19,125 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] [2020-07-21 12:21:19,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:19,327 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:19,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1868880609, now seen corresponding path program 1 times [2020-07-21 12:21:19,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:19,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014956996] [2020-07-21 12:21:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:19,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:21:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:20,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:20,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:20,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014956996] [2020-07-21 12:21:20,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:20,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:21:20,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607149317] [2020-07-21 12:21:20,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:21:20,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:20,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:21:20,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:21:20,428 INFO L87 Difference]: Start difference. First operand 112275 states and 189311 transitions. Second operand 7 states. [2020-07-21 12:21:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:30,882 INFO L93 Difference]: Finished difference Result 243708 states and 411920 transitions. [2020-07-21 12:21:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:21:30,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 430 [2020-07-21 12:21:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:31,149 INFO L225 Difference]: With dead ends: 243708 [2020-07-21 12:21:31,149 INFO L226 Difference]: Without dead ends: 218200 [2020-07-21 12:21:31,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:21:31,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218200 states. [2020-07-21 12:21:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218200 to 138782. [2020-07-21 12:21:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138782 states. [2020-07-21 12:21:37,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138782 states to 138782 states and 233948 transitions. [2020-07-21 12:21:37,605 INFO L78 Accepts]: Start accepts. Automaton has 138782 states and 233948 transitions. Word has length 430 [2020-07-21 12:21:37,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:37,605 INFO L479 AbstractCegarLoop]: Abstraction has 138782 states and 233948 transitions. [2020-07-21 12:21:37,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:21:37,605 INFO L276 IsEmpty]: Start isEmpty. Operand 138782 states and 233948 transitions. [2020-07-21 12:21:37,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2020-07-21 12:21:37,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:37,719 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] [2020-07-21 12:21:37,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:37,920 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:37,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash 626500905, now seen corresponding path program 1 times [2020-07-21 12:21:37,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:37,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468095067] [2020-07-21 12:21:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:38,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:21:38,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:38,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:38,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468095067] [2020-07-21 12:21:38,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:38,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:21:38,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686389837] [2020-07-21 12:21:38,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:21:38,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:38,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:21:38,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:21:38,571 INFO L87 Difference]: Start difference. First operand 138782 states and 233948 transitions. Second operand 7 states. [2020-07-21 12:21:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:21:50,474 INFO L93 Difference]: Finished difference Result 269636 states and 455718 transitions. [2020-07-21 12:21:50,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:21:50,475 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 430 [2020-07-21 12:21:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:21:50,990 INFO L225 Difference]: With dead ends: 269636 [2020-07-21 12:21:50,991 INFO L226 Difference]: Without dead ends: 243712 [2020-07-21 12:21:51,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:21:51,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243712 states. [2020-07-21 12:21:58,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243712 to 164938. [2020-07-21 12:21:58,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164938 states. [2020-07-21 12:21:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164938 states to 164938 states and 278042 transitions. [2020-07-21 12:21:58,312 INFO L78 Accepts]: Start accepts. Automaton has 164938 states and 278042 transitions. Word has length 430 [2020-07-21 12:21:58,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:58,312 INFO L479 AbstractCegarLoop]: Abstraction has 164938 states and 278042 transitions. [2020-07-21 12:21:58,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:21:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 164938 states and 278042 transitions. [2020-07-21 12:21:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2020-07-21 12:21:58,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:58,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (16)] Forcibly destroying the process [2020-07-21 12:22:01,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:01,030 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:01,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:01,030 INFO L82 PathProgramCache]: Analyzing trace with hash 466102239, now seen corresponding path program 1 times [2020-07-21 12:22:01,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:01,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814099914] [2020-07-21 12:22:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:01,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:01,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:22:01,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:01,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:01,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814099914] [2020-07-21 12:22:01,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:01,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:22:01,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660837487] [2020-07-21 12:22:01,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:22:01,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:01,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:22:01,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:22:01,664 INFO L87 Difference]: Start difference. First operand 164938 states and 278042 transitions. Second operand 7 states. [2020-07-21 12:22:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:14,153 INFO L93 Difference]: Finished difference Result 296219 states and 500371 transitions. [2020-07-21 12:22:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 12:22:14,154 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 430 [2020-07-21 12:22:14,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:14,425 INFO L225 Difference]: With dead ends: 296219 [2020-07-21 12:22:14,425 INFO L226 Difference]: Without dead ends: 270711 [2020-07-21 12:22:14,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:22:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270711 states. [2020-07-21 12:22:28,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270711 to 192137. [2020-07-21 12:22:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192137 states. [2020-07-21 12:22:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192137 states to 192137 states and 323840 transitions. [2020-07-21 12:22:28,520 INFO L78 Accepts]: Start accepts. Automaton has 192137 states and 323840 transitions. Word has length 430 [2020-07-21 12:22:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:28,520 INFO L479 AbstractCegarLoop]: Abstraction has 192137 states and 323840 transitions. [2020-07-21 12:22:28,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:22:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 192137 states and 323840 transitions. [2020-07-21 12:22:28,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-07-21 12:22:28,680 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:28,681 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] [2020-07-21 12:22:28,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:28,882 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:28,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:28,883 INFO L82 PathProgramCache]: Analyzing trace with hash 141758970, now seen corresponding path program 1 times [2020-07-21 12:22:28,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:28,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465200719] [2020-07-21 12:22:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:29,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:29,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:29,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:29,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465200719] [2020-07-21 12:22:29,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:29,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:29,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485470109] [2020-07-21 12:22:29,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:29,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:29,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:29,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:29,485 INFO L87 Difference]: Start difference. First operand 192137 states and 323840 transitions. Second operand 3 states. [2020-07-21 12:22:34,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:34,744 INFO L93 Difference]: Finished difference Result 296265 states and 499393 transitions. [2020-07-21 12:22:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:34,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 431 [2020-07-21 12:22:34,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:34,847 INFO L225 Difference]: With dead ends: 296265 [2020-07-21 12:22:34,847 INFO L226 Difference]: Without dead ends: 107100 [2020-07-21 12:22:34,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107100 states. [2020-07-21 12:22:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107100 to 107098. [2020-07-21 12:22:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107098 states. [2020-07-21 12:22:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107098 states to 107098 states and 180149 transitions. [2020-07-21 12:22:43,273 INFO L78 Accepts]: Start accepts. Automaton has 107098 states and 180149 transitions. Word has length 431 [2020-07-21 12:22:43,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:43,273 INFO L479 AbstractCegarLoop]: Abstraction has 107098 states and 180149 transitions. [2020-07-21 12:22:43,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:43,273 INFO L276 IsEmpty]: Start isEmpty. Operand 107098 states and 180149 transitions. [2020-07-21 12:22:43,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-07-21 12:22:43,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:43,353 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] [2020-07-21 12:22:43,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:43,554 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:43,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:43,555 INFO L82 PathProgramCache]: Analyzing trace with hash -862918480, now seen corresponding path program 1 times [2020-07-21 12:22:43,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:43,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448529655] [2020-07-21 12:22:43,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:44,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:44,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:44,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:44,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448529655] [2020-07-21 12:22:44,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:44,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:44,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146831819] [2020-07-21 12:22:44,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:44,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:44,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:44,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:44,347 INFO L87 Difference]: Start difference. First operand 107098 states and 180149 transitions. Second operand 3 states. [2020-07-21 12:22:49,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:49,313 INFO L93 Difference]: Finished difference Result 213507 states and 359074 transitions. [2020-07-21 12:22:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:22:49,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 431 [2020-07-21 12:22:49,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:49,417 INFO L225 Difference]: With dead ends: 213507 [2020-07-21 12:22:49,417 INFO L226 Difference]: Without dead ends: 106980 [2020-07-21 12:22:49,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106980 states. [2020-07-21 12:22:54,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106980 to 106980. [2020-07-21 12:22:54,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106980 states. [2020-07-21 12:22:55,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106980 states to 106980 states and 179692 transitions. [2020-07-21 12:22:55,114 INFO L78 Accepts]: Start accepts. Automaton has 106980 states and 179692 transitions. Word has length 431 [2020-07-21 12:22:55,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:22:55,115 INFO L479 AbstractCegarLoop]: Abstraction has 106980 states and 179692 transitions. [2020-07-21 12:22:55,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:22:55,115 INFO L276 IsEmpty]: Start isEmpty. Operand 106980 states and 179692 transitions. [2020-07-21 12:22:55,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-21 12:22:55,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:22:55,191 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] [2020-07-21 12:22:55,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:55,398 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:22:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:22:55,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1740089549, now seen corresponding path program 1 times [2020-07-21 12:22:55,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:22:55,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25644751] [2020-07-21 12:22:55,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:22:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:22:55,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 3072 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:22:55,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:22:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:22:55,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:22:55,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25644751] [2020-07-21 12:22:55,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:22:55,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:22:55,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959149989] [2020-07-21 12:22:55,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:22:55,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:22:55,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:22:55,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:22:55,991 INFO L87 Difference]: Start difference. First operand 106980 states and 179692 transitions. Second operand 3 states. [2020-07-21 12:23:00,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:00,347 INFO L93 Difference]: Finished difference Result 106986 states and 179695 transitions. [2020-07-21 12:23:00,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:00,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 435 [2020-07-21 12:23:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:00,410 INFO L225 Difference]: With dead ends: 106986 [2020-07-21 12:23:00,410 INFO L226 Difference]: Without dead ends: 53171 [2020-07-21 12:23:00,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:00,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53171 states. [2020-07-21 12:23:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53171 to 53169. [2020-07-21 12:23:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53169 states. [2020-07-21 12:23:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53169 states to 53169 states and 89416 transitions. [2020-07-21 12:23:02,907 INFO L78 Accepts]: Start accepts. Automaton has 53169 states and 89416 transitions. Word has length 435 [2020-07-21 12:23:02,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:02,907 INFO L479 AbstractCegarLoop]: Abstraction has 53169 states and 89416 transitions. [2020-07-21 12:23:02,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:02,907 INFO L276 IsEmpty]: Start isEmpty. Operand 53169 states and 89416 transitions. [2020-07-21 12:23:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2020-07-21 12:23:02,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:02,947 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] [2020-07-21 12:23:03,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:03,148 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash 2130422416, now seen corresponding path program 1 times [2020-07-21 12:23:03,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:03,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132578379] [2020-07-21 12:23:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:03,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 3080 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:03,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:03,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:03,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132578379] [2020-07-21 12:23:03,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:03,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:03,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531553316] [2020-07-21 12:23:03,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:03,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:03,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:03,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:03,984 INFO L87 Difference]: Start difference. First operand 53169 states and 89416 transitions. Second operand 3 states. [2020-07-21 12:23:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:05,250 INFO L93 Difference]: Finished difference Result 78484 states and 132007 transitions. [2020-07-21 12:23:05,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:05,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 439 [2020-07-21 12:23:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:05,280 INFO L225 Difference]: With dead ends: 78484 [2020-07-21 12:23:05,281 INFO L226 Difference]: Without dead ends: 26536 [2020-07-21 12:23:05,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:05,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26536 states. [2020-07-21 12:23:06,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26536 to 26534. [2020-07-21 12:23:06,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26534 states. [2020-07-21 12:23:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26534 states to 26534 states and 44555 transitions. [2020-07-21 12:23:06,766 INFO L78 Accepts]: Start accepts. Automaton has 26534 states and 44555 transitions. Word has length 439 [2020-07-21 12:23:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:06,766 INFO L479 AbstractCegarLoop]: Abstraction has 26534 states and 44555 transitions. [2020-07-21 12:23:06,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:06,766 INFO L276 IsEmpty]: Start isEmpty. Operand 26534 states and 44555 transitions. [2020-07-21 12:23:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2020-07-21 12:23:06,783 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:06,784 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] [2020-07-21 12:23:06,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:06,985 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:06,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:06,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1823505564, now seen corresponding path program 1 times [2020-07-21 12:23:06,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:06,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242704830] [2020-07-21 12:23:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:07,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 3080 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:07,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:07,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:07,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242704830] [2020-07-21 12:23:07,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:07,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:07,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804972383] [2020-07-21 12:23:07,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:07,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:07,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:07,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:07,548 INFO L87 Difference]: Start difference. First operand 26534 states and 44555 transitions. Second operand 3 states. [2020-07-21 12:23:08,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:08,823 INFO L93 Difference]: Finished difference Result 52451 states and 88036 transitions. [2020-07-21 12:23:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:08,824 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 439 [2020-07-21 12:23:08,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:08,849 INFO L225 Difference]: With dead ends: 52451 [2020-07-21 12:23:08,849 INFO L226 Difference]: Without dead ends: 26534 [2020-07-21 12:23:08,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:08,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26534 states. [2020-07-21 12:23:09,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26534 to 26534. [2020-07-21 12:23:09,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26534 states. [2020-07-21 12:23:09,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26534 states to 26534 states and 44554 transitions. [2020-07-21 12:23:09,984 INFO L78 Accepts]: Start accepts. Automaton has 26534 states and 44554 transitions. Word has length 439 [2020-07-21 12:23:09,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:09,985 INFO L479 AbstractCegarLoop]: Abstraction has 26534 states and 44554 transitions. [2020-07-21 12:23:09,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:09,985 INFO L276 IsEmpty]: Start isEmpty. Operand 26534 states and 44554 transitions. [2020-07-21 12:23:10,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2020-07-21 12:23:10,003 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:10,003 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] [2020-07-21 12:23:10,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:10,213 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:10,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1201304255, now seen corresponding path program 1 times [2020-07-21 12:23:10,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:10,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991604584] [2020-07-21 12:23:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:10,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 3088 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:23:10,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:10,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:10,798 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:10,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991604584] [2020-07-21 12:23:10,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:10,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:23:10,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038756117] [2020-07-21 12:23:10,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:23:10,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:10,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:23:10,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:10,800 INFO L87 Difference]: Start difference. First operand 26534 states and 44554 transitions. Second operand 3 states. [2020-07-21 12:23:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:11,564 INFO L93 Difference]: Finished difference Result 26540 states and 44557 transitions. [2020-07-21 12:23:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:23:11,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 443 [2020-07-21 12:23:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:11,578 INFO L225 Difference]: With dead ends: 26540 [2020-07-21 12:23:11,578 INFO L226 Difference]: Without dead ends: 13414 [2020-07-21 12:23:11,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:23:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13414 states. [2020-07-21 12:23:12,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13414 to 13412. [2020-07-21 12:23:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13412 states. [2020-07-21 12:23:12,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13412 states to 13412 states and 22557 transitions. [2020-07-21 12:23:12,145 INFO L78 Accepts]: Start accepts. Automaton has 13412 states and 22557 transitions. Word has length 443 [2020-07-21 12:23:12,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:12,145 INFO L479 AbstractCegarLoop]: Abstraction has 13412 states and 22557 transitions. [2020-07-21 12:23:12,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:23:12,145 INFO L276 IsEmpty]: Start isEmpty. Operand 13412 states and 22557 transitions. [2020-07-21 12:23:12,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-21 12:23:12,155 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:12,155 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] [2020-07-21 12:23:12,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:12,356 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:12,357 INFO L82 PathProgramCache]: Analyzing trace with hash -556470101, now seen corresponding path program 1 times [2020-07-21 12:23:12,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:12,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243110124] [2020-07-21 12:23:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:12,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 3097 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:23:12,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:12,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:12,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243110124] [2020-07-21 12:23:12,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:12,946 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:12,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416941624] [2020-07-21 12:23:12,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:12,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:12,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:12,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:12,947 INFO L87 Difference]: Start difference. First operand 13412 states and 22557 transitions. Second operand 4 states. [2020-07-21 12:23:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:14,598 INFO L93 Difference]: Finished difference Result 38708 states and 65053 transitions. [2020-07-21 12:23:14,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:23:14,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 448 [2020-07-21 12:23:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:14,631 INFO L225 Difference]: With dead ends: 38708 [2020-07-21 12:23:14,631 INFO L226 Difference]: Without dead ends: 26011 [2020-07-21 12:23:14,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 445 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26011 states. [2020-07-21 12:23:15,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26011 to 24156. [2020-07-21 12:23:15,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24156 states. [2020-07-21 12:23:15,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24156 states to 24156 states and 40474 transitions. [2020-07-21 12:23:15,742 INFO L78 Accepts]: Start accepts. Automaton has 24156 states and 40474 transitions. Word has length 448 [2020-07-21 12:23:15,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:15,742 INFO L479 AbstractCegarLoop]: Abstraction has 24156 states and 40474 transitions. [2020-07-21 12:23:15,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:23:15,742 INFO L276 IsEmpty]: Start isEmpty. Operand 24156 states and 40474 transitions. [2020-07-21 12:23:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-21 12:23:15,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:15,760 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] [2020-07-21 12:23:15,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:15,973 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:15,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:15,974 INFO L82 PathProgramCache]: Analyzing trace with hash 508990362, now seen corresponding path program 1 times [2020-07-21 12:23:15,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:15,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631915736] [2020-07-21 12:23:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:16,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 3098 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:23:16,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:16,577 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:16,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631915736] [2020-07-21 12:23:16,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:16,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:16,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111412098] [2020-07-21 12:23:16,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:16,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:16,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:16,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:16,579 INFO L87 Difference]: Start difference. First operand 24156 states and 40474 transitions. Second operand 4 states. [2020-07-21 12:23:19,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:19,122 INFO L93 Difference]: Finished difference Result 70808 states and 118586 transitions. [2020-07-21 12:23:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:23:19,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 449 [2020-07-21 12:23:19,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:19,173 INFO L225 Difference]: With dead ends: 70808 [2020-07-21 12:23:19,173 INFO L226 Difference]: Without dead ends: 47367 [2020-07-21 12:23:19,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 446 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47367 states. [2020-07-21 12:23:21,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47367 to 43705. [2020-07-21 12:23:21,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43705 states. [2020-07-21 12:23:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43705 states to 43705 states and 72956 transitions. [2020-07-21 12:23:21,424 INFO L78 Accepts]: Start accepts. Automaton has 43705 states and 72956 transitions. Word has length 449 [2020-07-21 12:23:21,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:21,424 INFO L479 AbstractCegarLoop]: Abstraction has 43705 states and 72956 transitions. [2020-07-21 12:23:21,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:23:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 43705 states and 72956 transitions. [2020-07-21 12:23:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 12:23:21,455 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:21,456 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] [2020-07-21 12:23:21,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:21,657 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:21,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:21,657 INFO L82 PathProgramCache]: Analyzing trace with hash 579405732, now seen corresponding path program 1 times [2020-07-21 12:23:21,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:21,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366832680] [2020-07-21 12:23:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:22,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:22,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 3099 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:23:22,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:22,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:22,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366832680] [2020-07-21 12:23:22,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:22,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:22,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713242043] [2020-07-21 12:23:22,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:22,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:22,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:22,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:22,494 INFO L87 Difference]: Start difference. First operand 43705 states and 72956 transitions. Second operand 4 states. [2020-07-21 12:23:27,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:27,259 INFO L93 Difference]: Finished difference Result 129163 states and 215542 transitions. [2020-07-21 12:23:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:23:27,259 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 450 [2020-07-21 12:23:27,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:27,339 INFO L225 Difference]: With dead ends: 129163 [2020-07-21 12:23:27,339 INFO L226 Difference]: Without dead ends: 86173 [2020-07-21 12:23:27,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 447 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:27,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86173 states. [2020-07-21 12:23:31,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86173 to 78939. [2020-07-21 12:23:31,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78939 states. [2020-07-21 12:23:31,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78939 states to 78939 states and 131279 transitions. [2020-07-21 12:23:31,621 INFO L78 Accepts]: Start accepts. Automaton has 78939 states and 131279 transitions. Word has length 450 [2020-07-21 12:23:31,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:31,621 INFO L479 AbstractCegarLoop]: Abstraction has 78939 states and 131279 transitions. [2020-07-21 12:23:31,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:23:31,621 INFO L276 IsEmpty]: Start isEmpty. Operand 78939 states and 131279 transitions. [2020-07-21 12:23:31,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-07-21 12:23:31,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:31,678 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] [2020-07-21 12:23:31,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:31,879 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash -131805709, now seen corresponding path program 1 times [2020-07-21 12:23:31,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:31,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820586344] [2020-07-21 12:23:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 3100 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:23:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:32,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:32,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820586344] [2020-07-21 12:23:32,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:32,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:32,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94668294] [2020-07-21 12:23:32,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:32,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:32,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:32,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:32,871 INFO L87 Difference]: Start difference. First operand 78939 states and 131279 transitions. Second operand 4 states. [2020-07-21 12:23:41,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:23:41,229 INFO L93 Difference]: Finished difference Result 230757 states and 383697 transitions. [2020-07-21 12:23:41,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:23:41,229 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 451 [2020-07-21 12:23:41,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:23:41,384 INFO L225 Difference]: With dead ends: 230757 [2020-07-21 12:23:41,385 INFO L226 Difference]: Without dead ends: 152533 [2020-07-21 12:23:41,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152533 states. [2020-07-21 12:23:50,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152533 to 139982. [2020-07-21 12:23:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139982 states. [2020-07-21 12:23:50,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139982 states to 139982 states and 231941 transitions. [2020-07-21 12:23:50,891 INFO L78 Accepts]: Start accepts. Automaton has 139982 states and 231941 transitions. Word has length 451 [2020-07-21 12:23:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:50,892 INFO L479 AbstractCegarLoop]: Abstraction has 139982 states and 231941 transitions. [2020-07-21 12:23:50,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:23:50,892 INFO L276 IsEmpty]: Start isEmpty. Operand 139982 states and 231941 transitions. [2020-07-21 12:23:50,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-07-21 12:23:50,996 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:50,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:51,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:51,197 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:51,198 INFO L82 PathProgramCache]: Analyzing trace with hash 696355485, now seen corresponding path program 1 times [2020-07-21 12:23:51,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:51,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1069780740] [2020-07-21 12:23:51,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:51,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 3101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:23:51,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:51,788 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:51,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1069780740] [2020-07-21 12:23:51,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:51,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:51,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744834500] [2020-07-21 12:23:51,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:51,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:51,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:51,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:51,789 INFO L87 Difference]: Start difference. First operand 139982 states and 231941 transitions. Second operand 4 states. [2020-07-21 12:24:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:24:09,358 INFO L93 Difference]: Finished difference Result 349281 states and 579243 transitions. [2020-07-21 12:24:09,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:24:09,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 452 [2020-07-21 12:24:09,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:24:09,862 INFO L225 Difference]: With dead ends: 349281 [2020-07-21 12:24:09,862 INFO L226 Difference]: Without dead ends: 294852 [2020-07-21 12:24:09,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:24:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294852 states. [2020-07-21 12:24:29,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294852 to 294745. [2020-07-21 12:24:29,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294745 states. [2020-07-21 12:24:30,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294745 states to 294745 states and 488133 transitions. [2020-07-21 12:24:30,076 INFO L78 Accepts]: Start accepts. Automaton has 294745 states and 488133 transitions. Word has length 452 [2020-07-21 12:24:30,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:24:30,077 INFO L479 AbstractCegarLoop]: Abstraction has 294745 states and 488133 transitions. [2020-07-21 12:24:30,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:24:30,077 INFO L276 IsEmpty]: Start isEmpty. Operand 294745 states and 488133 transitions. [2020-07-21 12:24:30,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2020-07-21 12:24:30,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:24:30,309 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] [2020-07-21 12:24:30,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:30,510 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:24:30,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:24:30,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1298741052, now seen corresponding path program 1 times [2020-07-21 12:24:30,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:24:30,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229496363] [2020-07-21 12:24:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:24:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:24:30,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 3101 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:24:31,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:24:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:24:31,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:24:31,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229496363] [2020-07-21 12:24:31,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:24:31,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:24:31,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475186491] [2020-07-21 12:24:31,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:24:31,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:24:31,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:24:31,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:24:31,114 INFO L87 Difference]: Start difference. First operand 294745 states and 488133 transitions. Second operand 4 states. [2020-07-21 12:24:53,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:24:53,597 INFO L93 Difference]: Finished difference Result 588541 states and 975661 transitions. [2020-07-21 12:24:53,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:24:53,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 452 [2020-07-21 12:24:53,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:24:53,930 INFO L225 Difference]: With dead ends: 588541 [2020-07-21 12:24:53,931 INFO L226 Difference]: Without dead ends: 312500 [2020-07-21 12:24:54,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 449 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:24:54,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312500 states. [2020-07-21 12:25:15,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312500 to 275541. [2020-07-21 12:25:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275541 states. [2020-07-21 12:25:15,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275541 states to 275541 states and 455218 transitions. [2020-07-21 12:25:15,425 INFO L78 Accepts]: Start accepts. Automaton has 275541 states and 455218 transitions. Word has length 452 [2020-07-21 12:25:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:25:15,426 INFO L479 AbstractCegarLoop]: Abstraction has 275541 states and 455218 transitions. [2020-07-21 12:25:15,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:25:15,426 INFO L276 IsEmpty]: Start isEmpty. Operand 275541 states and 455218 transitions. [2020-07-21 12:25:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2020-07-21 12:25:15,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:25:15,638 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] [2020-07-21 12:25:15,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:25:15,839 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:25:15,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:25:15,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1728223182, now seen corresponding path program 1 times [2020-07-21 12:25:15,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:25:15,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120095138] [2020-07-21 12:25:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:25:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:25:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 3105 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:25:16,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:25:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:25:16,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:25:16,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120095138] [2020-07-21 12:25:16,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:25:16,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:25:16,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048884554] [2020-07-21 12:25:16,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:25:16,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:25:16,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:25:16,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:25:16,482 INFO L87 Difference]: Start difference. First operand 275541 states and 455218 transitions. Second operand 3 states. [2020-07-21 12:25:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:25:46,312 INFO L93 Difference]: Finished difference Result 596451 states and 986123 transitions. [2020-07-21 12:25:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:25:46,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 453 [2020-07-21 12:25:46,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:25:46,851 INFO L225 Difference]: With dead ends: 596451 [2020-07-21 12:25:46,852 INFO L226 Difference]: Without dead ends: 460888 [2020-07-21 12:25:47,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:25:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460888 states. [2020-07-21 12:26:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460888 to 460452. [2020-07-21 12:26:21,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460452 states. [2020-07-21 12:26:21,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460452 states to 460452 states and 760025 transitions. [2020-07-21 12:26:21,855 INFO L78 Accepts]: Start accepts. Automaton has 460452 states and 760025 transitions. Word has length 453 [2020-07-21 12:26:21,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:21,855 INFO L479 AbstractCegarLoop]: Abstraction has 460452 states and 760025 transitions. [2020-07-21 12:26:21,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:26:21,855 INFO L276 IsEmpty]: Start isEmpty. Operand 460452 states and 760025 transitions. [2020-07-21 12:26:22,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2020-07-21 12:26:22,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:22,202 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] [2020-07-21 12:26:22,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:22,403 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:22,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:22,404 INFO L82 PathProgramCache]: Analyzing trace with hash 887719383, now seen corresponding path program 1 times [2020-07-21 12:26:22,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:22,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125160782] [2020-07-21 12:26:22,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:23,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 3111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:26:23,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:24,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:26:24,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:24,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125160782] [2020-07-21 12:26:24,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:24,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:26:24,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807816877] [2020-07-21 12:26:24,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:26:24,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:24,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:26:24,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:26:24,058 INFO L87 Difference]: Start difference. First operand 460452 states and 760025 transitions. Second operand 7 states. [2020-07-21 12:27:30,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:30,164 INFO L93 Difference]: Finished difference Result 1325137 states and 2185193 transitions. [2020-07-21 12:27:30,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:27:30,164 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 454 [2020-07-21 12:27:30,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:31,340 INFO L225 Difference]: With dead ends: 1325137 [2020-07-21 12:27:31,340 INFO L226 Difference]: Without dead ends: 866031 [2020-07-21 12:27:31,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:27:32,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866031 states. [2020-07-21 12:28:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866031 to 460452. [2020-07-21 12:28:21,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460452 states. [2020-07-21 12:28:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460452 states to 460452 states and 750655 transitions. [2020-07-21 12:28:21,935 INFO L78 Accepts]: Start accepts. Automaton has 460452 states and 750655 transitions. Word has length 454 [2020-07-21 12:28:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:28:21,935 INFO L479 AbstractCegarLoop]: Abstraction has 460452 states and 750655 transitions. [2020-07-21 12:28:21,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:28:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 460452 states and 750655 transitions. [2020-07-21 12:28:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2020-07-21 12:28:22,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:28:22,267 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] [2020-07-21 12:28:22,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:28:22,468 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:28:22,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:28:22,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1603373023, now seen corresponding path program 1 times [2020-07-21 12:28:22,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:28:22,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323304517] [2020-07-21 12:28:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:28:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:28:22,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 3111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:28:22,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:28:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:28:23,168 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:28:23,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323304517] [2020-07-21 12:28:23,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:28:23,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:28:23,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795017443] [2020-07-21 12:28:23,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:28:23,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:28:23,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:28:23,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:28:23,170 INFO L87 Difference]: Start difference. First operand 460452 states and 750655 transitions. Second operand 7 states. [2020-07-21 12:29:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:34,236 INFO L93 Difference]: Finished difference Result 1236648 states and 2013195 transitions. [2020-07-21 12:29:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 12:29:34,237 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 454 [2020-07-21 12:29:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:35,898 INFO L225 Difference]: With dead ends: 1236648 [2020-07-21 12:29:35,898 INFO L226 Difference]: Without dead ends: 861307 [2020-07-21 12:29:36,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-07-21 12:29:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861307 states. [2020-07-21 12:30:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861307 to 460452. [2020-07-21 12:30:27,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460452 states. [2020-07-21 12:30:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460452 states to 460452 states and 750653 transitions. [2020-07-21 12:30:28,431 INFO L78 Accepts]: Start accepts. Automaton has 460452 states and 750653 transitions. Word has length 454 [2020-07-21 12:30:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:28,432 INFO L479 AbstractCegarLoop]: Abstraction has 460452 states and 750653 transitions. [2020-07-21 12:30:28,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:30:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand 460452 states and 750653 transitions. [2020-07-21 12:30:28,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2020-07-21 12:30:28,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:28,768 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] [2020-07-21 12:30:28,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:28,975 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:28,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1071299337, now seen corresponding path program 1 times [2020-07-21 12:30:28,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:28,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127829975] [2020-07-21 12:30:28,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:29,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 3103 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:30:29,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:30:29,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:29,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127829975] [2020-07-21 12:30:29,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:29,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:30:29,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957516934] [2020-07-21 12:30:29,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:30:29,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:29,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:30:29,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:30:29,553 INFO L87 Difference]: Start difference. First operand 460452 states and 750653 transitions. Second operand 3 states. [2020-07-21 12:30:53,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:30:53,385 INFO L93 Difference]: Finished difference Result 676259 states and 1102521 transitions. [2020-07-21 12:30:53,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:30:53,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 454 [2020-07-21 12:30:53,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:30:53,622 INFO L225 Difference]: With dead ends: 676259 [2020-07-21 12:30:53,622 INFO L226 Difference]: Without dead ends: 217048 [2020-07-21 12:30:53,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:30:54,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217048 states. [2020-07-21 12:31:10,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217048 to 217046. [2020-07-21 12:31:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217046 states. [2020-07-21 12:31:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217046 states to 217046 states and 352956 transitions. [2020-07-21 12:31:11,185 INFO L78 Accepts]: Start accepts. Automaton has 217046 states and 352956 transitions. Word has length 454 [2020-07-21 12:31:11,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:31:11,185 INFO L479 AbstractCegarLoop]: Abstraction has 217046 states and 352956 transitions. [2020-07-21 12:31:11,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:31:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 217046 states and 352956 transitions. [2020-07-21 12:31:11,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2020-07-21 12:31:11,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:31:11,331 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] [2020-07-21 12:31:11,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:31:11,537 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:31:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:31:11,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1373166132, now seen corresponding path program 1 times [2020-07-21 12:31:11,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:31:11,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [536468522] [2020-07-21 12:31:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:31:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:31:12,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 3103 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:31:12,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:31:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:31:12,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:31:12,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [536468522] [2020-07-21 12:31:12,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:31:12,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:31:12,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351315225] [2020-07-21 12:31:12,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:31:12,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:31:12,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:31:12,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:31:12,098 INFO L87 Difference]: Start difference. First operand 217046 states and 352956 transitions. Second operand 3 states. [2020-07-21 12:31:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:31:32,876 INFO L93 Difference]: Finished difference Result 433429 states and 704772 transitions. [2020-07-21 12:31:32,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:31:32,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 454 [2020-07-21 12:31:32,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:31:33,124 INFO L225 Difference]: With dead ends: 433429 [2020-07-21 12:31:33,124 INFO L226 Difference]: Without dead ends: 217046 [2020-07-21 12:31:33,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:31:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217046 states. [2020-07-21 12:31:50,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217046 to 217046. [2020-07-21 12:31:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217046 states. [2020-07-21 12:31:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217046 states to 217046 states and 352955 transitions. [2020-07-21 12:31:51,017 INFO L78 Accepts]: Start accepts. Automaton has 217046 states and 352955 transitions. Word has length 454 [2020-07-21 12:31:51,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:31:51,018 INFO L479 AbstractCegarLoop]: Abstraction has 217046 states and 352955 transitions. [2020-07-21 12:31:51,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:31:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 217046 states and 352955 transitions. [2020-07-21 12:31:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-07-21 12:31:51,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:31:51,179 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] [2020-07-21 12:31:51,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:31:51,380 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:31:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:31:51,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1499177993, now seen corresponding path program 1 times [2020-07-21 12:31:51,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:31:51,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938559713] [2020-07-21 12:31:51,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:31:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:31:51,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 3111 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-21 12:31:51,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:31:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:31:52,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:31:52,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938559713] [2020-07-21 12:31:52,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:31:52,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 12:31:52,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260453812] [2020-07-21 12:31:52,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:31:52,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:31:52,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:31:52,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:31:52,050 INFO L87 Difference]: Start difference. First operand 217046 states and 352955 transitions. Second operand 7 states.