/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 12:39:57,308 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 12:39:57,312 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 12:39:57,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 12:39:57,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 12:39:57,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 12:39:57,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 12:39:57,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 12:39:57,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 12:39:57,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 12:39:57,352 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 12:39:57,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 12:39:57,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 12:39:57,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 12:39:57,360 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 12:39:57,362 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 12:39:57,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 12:39:57,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 12:39:57,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 12:39:57,368 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 12:39:57,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 12:39:57,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 12:39:57,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 12:39:57,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 12:39:57,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 12:39:57,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 12:39:57,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 12:39:57,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 12:39:57,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 12:39:57,397 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 12:39:57,398 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 12:39:57,399 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 12:39:57,399 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 12:39:57,399 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 12:39:57,399 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 12:39:57,400 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 12:39:57,400 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 12:39:57,400 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 12:39:57,400 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 12:39:57,400 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 12:39:57,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 12:39:57,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 12:39:57,401 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 12:39:57,401 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 12:39:57,401 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 12:39:57,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 12:39:57,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 12:39:57,402 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 12:39:57,402 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 12:39:57,402 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 12:39:57,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:39:57,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 12:39:57,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 12:39:57,403 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 12:39:57,403 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 12:39:57,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:39:57,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 12:39:57,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 12:39:57,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 12:39:57,688 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 12:39:57,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 12:39:57,705 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 12:39:57,707 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 12:39:57,707 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 12:39:57,708 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 12:39:57,777 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/266145805/4ffba2ce02f74fca8c76eaafd5f09415/FLAGc16d5c3dc [2020-07-20 12:39:58,521 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 12:39:58,521 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 12:39:58,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/266145805/4ffba2ce02f74fca8c76eaafd5f09415/FLAGc16d5c3dc [2020-07-20 12:39:58,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/266145805/4ffba2ce02f74fca8c76eaafd5f09415 [2020-07-20 12:39:58,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 12:39:58,710 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 12:39:58,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 12:39:58,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 12:39:58,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 12:39:58,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:39:58" (1/1) ... [2020-07-20 12:39:58,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77ac54e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:39:58, skipping insertion in model container [2020-07-20 12:39:58,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 12:39:58" (1/1) ... [2020-07-20 12:39:58,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 12:39:58,910 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 12:40:00,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:40:00,530 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 12:40:02,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 12:40:02,118 INFO L208 MainTranslator]: Completed translation [2020-07-20 12:40:02,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:02 WrapperNode [2020-07-20 12:40:02,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 12:40:02,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 12:40:02,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 12:40:02,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 12:40:02,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:02" (1/1) ... [2020-07-20 12:40:02,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:02" (1/1) ... [2020-07-20 12:40:02,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:02" (1/1) ... [2020-07-20 12:40:02,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:02" (1/1) ... [2020-07-20 12:40:02,297 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:02" (1/1) ... [2020-07-20 12:40:02,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:02" (1/1) ... [2020-07-20 12:40:02,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:02" (1/1) ... [2020-07-20 12:40:02,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 12:40:02,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 12:40:02,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 12:40:02,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 12:40:02,398 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 12:40:02,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 12:40:02,474 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 12:40:02,474 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 12:40:02,475 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 12:40:02,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 12:40:02,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 12:40:02,475 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 12:40:02,476 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 12:40:02,476 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 12:40:02,477 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 12:40:02,477 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 12:40:02,477 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 12:40:02,478 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 12:40:02,478 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 12:40:02,478 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 12:40:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 12:40:02,479 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 12:40:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 12:40:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 12:40:02,480 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 12:40:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 12:40:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 12:40:02,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 12:40:06,844 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 12:40:06,845 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 12:40:06,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:40:06 BoogieIcfgContainer [2020-07-20 12:40:06,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 12:40:06,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 12:40:06,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 12:40:06,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 12:40:06,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 12:39:58" (1/3) ... [2020-07-20 12:40:06,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a56030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:40:06, skipping insertion in model container [2020-07-20 12:40:06,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 12:40:02" (2/3) ... [2020-07-20 12:40:06,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a56030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 12:40:06, skipping insertion in model container [2020-07-20 12:40:06,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 12:40:06" (3/3) ... [2020-07-20 12:40:06,867 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 12:40:06,877 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 12:40:06,897 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 12:40:06,914 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 12:40:06,942 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 12:40:06,943 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 12:40:06,943 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 12:40:06,943 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 12:40:06,943 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 12:40:06,943 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 12:40:06,944 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 12:40:06,944 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 12:40:06,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2020-07-20 12:40:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 12:40:07,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:07,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:07,033 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:07,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times [2020-07-20 12:40:07,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:07,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438089931] [2020-07-20 12:40:07,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:07,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 3055 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:40:07,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:08,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:08,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438089931] [2020-07-20 12:40:08,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:08,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:08,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449446426] [2020-07-20 12:40:08,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:08,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:08,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:08,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:08,148 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 3 states. [2020-07-20 12:40:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:08,487 INFO L93 Difference]: Finished difference Result 2488 states and 4423 transitions. [2020-07-20 12:40:08,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:08,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-20 12:40:08,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:08,523 INFO L225 Difference]: With dead ends: 2488 [2020-07-20 12:40:08,523 INFO L226 Difference]: Without dead ends: 2186 [2020-07-20 12:40:08,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:08,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2020-07-20 12:40:08,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2020-07-20 12:40:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2020-07-20 12:40:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3563 transitions. [2020-07-20 12:40:08,693 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3563 transitions. Word has length 496 [2020-07-20 12:40:08,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:08,695 INFO L479 AbstractCegarLoop]: Abstraction has 2184 states and 3563 transitions. [2020-07-20 12:40:08,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:08,695 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3563 transitions. [2020-07-20 12:40:08,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 12:40:08,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:08,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:08,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:08,925 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:08,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash 426855444, now seen corresponding path program 1 times [2020-07-20 12:40:08,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:08,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31209564] [2020-07-20 12:40:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:09,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:09,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 3056 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:40:09,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:09,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:09,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31209564] [2020-07-20 12:40:09,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:09,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:40:09,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682210034] [2020-07-20 12:40:09,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:40:09,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:09,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:40:09,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:40:09,820 INFO L87 Difference]: Start difference. First operand 2184 states and 3563 transitions. Second operand 4 states. [2020-07-20 12:40:10,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:10,235 INFO L93 Difference]: Finished difference Result 6378 states and 10379 transitions. [2020-07-20 12:40:10,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:40:10,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-20 12:40:10,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:10,263 INFO L225 Difference]: With dead ends: 6378 [2020-07-20 12:40:10,263 INFO L226 Difference]: Without dead ends: 4271 [2020-07-20 12:40:10,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:40:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4271 states. [2020-07-20 12:40:10,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4271 to 4269. [2020-07-20 12:40:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4269 states. [2020-07-20 12:40:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4269 states to 4269 states and 6928 transitions. [2020-07-20 12:40:10,480 INFO L78 Accepts]: Start accepts. Automaton has 4269 states and 6928 transitions. Word has length 496 [2020-07-20 12:40:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:10,481 INFO L479 AbstractCegarLoop]: Abstraction has 4269 states and 6928 transitions. [2020-07-20 12:40:10,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:40:10,481 INFO L276 IsEmpty]: Start isEmpty. Operand 4269 states and 6928 transitions. [2020-07-20 12:40:10,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 12:40:10,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:10,498 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:10,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:10,713 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:10,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:10,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1666408241, now seen corresponding path program 1 times [2020-07-20 12:40:10,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:10,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903210824] [2020-07-20 12:40:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:11,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 3059 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:11,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:11,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:11,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903210824] [2020-07-20 12:40:11,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:11,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:11,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298216583] [2020-07-20 12:40:11,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:11,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:11,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:11,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:11,511 INFO L87 Difference]: Start difference. First operand 4269 states and 6928 transitions. Second operand 3 states. [2020-07-20 12:40:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:12,038 INFO L93 Difference]: Finished difference Result 12445 states and 20134 transitions. [2020-07-20 12:40:12,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:12,039 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-20 12:40:12,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:12,090 INFO L225 Difference]: With dead ends: 12445 [2020-07-20 12:40:12,090 INFO L226 Difference]: Without dead ends: 8341 [2020-07-20 12:40:12,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:12,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8341 states. [2020-07-20 12:40:12,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8341 to 8339. [2020-07-20 12:40:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8339 states. [2020-07-20 12:40:12,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8339 states to 8339 states and 13465 transitions. [2020-07-20 12:40:12,677 INFO L78 Accepts]: Start accepts. Automaton has 8339 states and 13465 transitions. Word has length 498 [2020-07-20 12:40:12,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:12,678 INFO L479 AbstractCegarLoop]: Abstraction has 8339 states and 13465 transitions. [2020-07-20 12:40:12,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 8339 states and 13465 transitions. [2020-07-20 12:40:12,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 12:40:12,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:12,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:12,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:12,917 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:12,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:12,918 INFO L82 PathProgramCache]: Analyzing trace with hash -285544027, now seen corresponding path program 1 times [2020-07-20 12:40:12,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:12,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510147166] [2020-07-20 12:40:12,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:13,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 3061 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:13,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:13,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:13,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510147166] [2020-07-20 12:40:13,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:13,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:13,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986894809] [2020-07-20 12:40:13,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:13,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:13,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:13,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:13,782 INFO L87 Difference]: Start difference. First operand 8339 states and 13465 transitions. Second operand 3 states. [2020-07-20 12:40:14,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:14,309 INFO L93 Difference]: Finished difference Result 24245 states and 38981 transitions. [2020-07-20 12:40:14,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:14,310 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-20 12:40:14,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:14,386 INFO L225 Difference]: With dead ends: 24245 [2020-07-20 12:40:14,386 INFO L226 Difference]: Without dead ends: 16295 [2020-07-20 12:40:14,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16295 states. [2020-07-20 12:40:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16295 to 8391. [2020-07-20 12:40:15,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8391 states. [2020-07-20 12:40:15,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8391 states to 8391 states and 13545 transitions. [2020-07-20 12:40:15,406 INFO L78 Accepts]: Start accepts. Automaton has 8391 states and 13545 transitions. Word has length 499 [2020-07-20 12:40:15,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:15,407 INFO L479 AbstractCegarLoop]: Abstraction has 8391 states and 13545 transitions. [2020-07-20 12:40:15,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:15,411 INFO L276 IsEmpty]: Start isEmpty. Operand 8391 states and 13545 transitions. [2020-07-20 12:40:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 12:40:15,432 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:15,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:15,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:15,646 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:15,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:15,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2128133332, now seen corresponding path program 1 times [2020-07-20 12:40:15,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:15,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943339147] [2020-07-20 12:40:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:16,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:16,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 3062 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:16,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:16,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:16,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943339147] [2020-07-20 12:40:16,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:16,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:16,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993571230] [2020-07-20 12:40:16,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:16,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:16,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:16,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:16,510 INFO L87 Difference]: Start difference. First operand 8391 states and 13545 transitions. Second operand 3 states. [2020-07-20 12:40:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:16,990 INFO L93 Difference]: Finished difference Result 24659 states and 39722 transitions. [2020-07-20 12:40:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:16,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-20 12:40:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:17,036 INFO L225 Difference]: With dead ends: 24659 [2020-07-20 12:40:17,036 INFO L226 Difference]: Without dead ends: 16499 [2020-07-20 12:40:17,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16499 states. [2020-07-20 12:40:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16499 to 16497. [2020-07-20 12:40:17,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16497 states. [2020-07-20 12:40:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16497 states to 16497 states and 26512 transitions. [2020-07-20 12:40:17,630 INFO L78 Accepts]: Start accepts. Automaton has 16497 states and 26512 transitions. Word has length 500 [2020-07-20 12:40:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:17,630 INFO L479 AbstractCegarLoop]: Abstraction has 16497 states and 26512 transitions. [2020-07-20 12:40:17,631 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:17,631 INFO L276 IsEmpty]: Start isEmpty. Operand 16497 states and 26512 transitions. [2020-07-20 12:40:17,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 12:40:17,668 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:17,668 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:17,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:17,882 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:17,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:17,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1506664655, now seen corresponding path program 1 times [2020-07-20 12:40:17,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:17,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031685941] [2020-07-20 12:40:17,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:18,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:18,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:18,685 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:18,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031685941] [2020-07-20 12:40:18,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:18,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:18,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866884435] [2020-07-20 12:40:18,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:18,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:18,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:18,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:18,688 INFO L87 Difference]: Start difference. First operand 16497 states and 26512 transitions. Second operand 3 states. [2020-07-20 12:40:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:19,296 INFO L93 Difference]: Finished difference Result 48031 states and 76892 transitions. [2020-07-20 12:40:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:19,297 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-20 12:40:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:19,378 INFO L225 Difference]: With dead ends: 48031 [2020-07-20 12:40:19,378 INFO L226 Difference]: Without dead ends: 32271 [2020-07-20 12:40:19,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:19,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32271 states. [2020-07-20 12:40:20,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32271 to 16655. [2020-07-20 12:40:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16655 states. [2020-07-20 12:40:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16655 states to 16655 states and 26750 transitions. [2020-07-20 12:40:20,031 INFO L78 Accepts]: Start accepts. Automaton has 16655 states and 26750 transitions. Word has length 500 [2020-07-20 12:40:20,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:20,032 INFO L479 AbstractCegarLoop]: Abstraction has 16655 states and 26750 transitions. [2020-07-20 12:40:20,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:20,032 INFO L276 IsEmpty]: Start isEmpty. Operand 16655 states and 26750 transitions. [2020-07-20 12:40:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-20 12:40:20,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:20,063 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:20,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:20,277 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:20,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:20,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2112687978, now seen corresponding path program 1 times [2020-07-20 12:40:20,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:20,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334257773] [2020-07-20 12:40:20,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:20,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:20,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:20,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:20,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:20,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334257773] [2020-07-20 12:40:20,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:20,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:20,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854861253] [2020-07-20 12:40:20,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:20,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:20,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:20,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:20,950 INFO L87 Difference]: Start difference. First operand 16655 states and 26750 transitions. Second operand 3 states. [2020-07-20 12:40:21,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:21,535 INFO L93 Difference]: Finished difference Result 48245 states and 77171 transitions. [2020-07-20 12:40:21,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:21,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 501 [2020-07-20 12:40:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:21,616 INFO L225 Difference]: With dead ends: 48245 [2020-07-20 12:40:21,616 INFO L226 Difference]: Without dead ends: 32461 [2020-07-20 12:40:21,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:21,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32461 states. [2020-07-20 12:40:23,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32461 to 16845. [2020-07-20 12:40:23,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16845 states. [2020-07-20 12:40:23,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16845 states to 16845 states and 26992 transitions. [2020-07-20 12:40:23,184 INFO L78 Accepts]: Start accepts. Automaton has 16845 states and 26992 transitions. Word has length 501 [2020-07-20 12:40:23,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:23,184 INFO L479 AbstractCegarLoop]: Abstraction has 16845 states and 26992 transitions. [2020-07-20 12:40:23,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:23,185 INFO L276 IsEmpty]: Start isEmpty. Operand 16845 states and 26992 transitions. [2020-07-20 12:40:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 12:40:23,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:23,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:23,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:23,404 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:23,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:23,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1153414160, now seen corresponding path program 1 times [2020-07-20 12:40:23,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:23,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704768210] [2020-07-20 12:40:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:23,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 12:40:23,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:24,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:24,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1704768210] [2020-07-20 12:40:24,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:24,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:24,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157126362] [2020-07-20 12:40:24,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:24,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:24,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:24,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:24,203 INFO L87 Difference]: Start difference. First operand 16845 states and 26992 transitions. Second operand 3 states. [2020-07-20 12:40:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:24,828 INFO L93 Difference]: Finished difference Result 23841 states and 38802 transitions. [2020-07-20 12:40:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:24,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-20 12:40:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:24,888 INFO L225 Difference]: With dead ends: 23841 [2020-07-20 12:40:24,888 INFO L226 Difference]: Without dead ends: 20343 [2020-07-20 12:40:24,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:24,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20343 states. [2020-07-20 12:40:25,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20343 to 20333. [2020-07-20 12:40:25,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20333 states. [2020-07-20 12:40:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20333 states to 20333 states and 32832 transitions. [2020-07-20 12:40:25,679 INFO L78 Accepts]: Start accepts. Automaton has 20333 states and 32832 transitions. Word has length 502 [2020-07-20 12:40:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:25,680 INFO L479 AbstractCegarLoop]: Abstraction has 20333 states and 32832 transitions. [2020-07-20 12:40:25,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:25,680 INFO L276 IsEmpty]: Start isEmpty. Operand 20333 states and 32832 transitions. [2020-07-20 12:40:25,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 12:40:25,696 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:25,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:25,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:25,902 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:25,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1306882671, now seen corresponding path program 1 times [2020-07-20 12:40:25,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:25,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154084703] [2020-07-20 12:40:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:26,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:26,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 3075 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:40:26,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:27,146 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:27,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154084703] [2020-07-20 12:40:27,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:27,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:40:27,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394548521] [2020-07-20 12:40:27,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:40:27,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:27,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:40:27,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:40:27,149 INFO L87 Difference]: Start difference. First operand 20333 states and 32832 transitions. Second operand 8 states. [2020-07-20 12:40:30,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:30,284 INFO L93 Difference]: Finished difference Result 53184 states and 85495 transitions. [2020-07-20 12:40:30,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:40:30,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 502 [2020-07-20 12:40:30,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:30,356 INFO L225 Difference]: With dead ends: 53184 [2020-07-20 12:40:30,356 INFO L226 Difference]: Without dead ends: 37224 [2020-07-20 12:40:30,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:40:30,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37224 states. [2020-07-20 12:40:31,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37224 to 21922. [2020-07-20 12:40:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21922 states. [2020-07-20 12:40:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21922 states to 21922 states and 34965 transitions. [2020-07-20 12:40:31,683 INFO L78 Accepts]: Start accepts. Automaton has 21922 states and 34965 transitions. Word has length 502 [2020-07-20 12:40:31,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:31,684 INFO L479 AbstractCegarLoop]: Abstraction has 21922 states and 34965 transitions. [2020-07-20 12:40:31,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:40:31,685 INFO L276 IsEmpty]: Start isEmpty. Operand 21922 states and 34965 transitions. [2020-07-20 12:40:31,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 12:40:31,699 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:31,700 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:31,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:31,901 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:31,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:31,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1267349537, now seen corresponding path program 1 times [2020-07-20 12:40:31,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:31,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40876415] [2020-07-20 12:40:31,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:32,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 3071 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:32,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:32,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:32,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40876415] [2020-07-20 12:40:32,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:32,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:32,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161656052] [2020-07-20 12:40:32,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:32,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:32,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:32,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:32,551 INFO L87 Difference]: Start difference. First operand 21922 states and 34965 transitions. Second operand 3 states. [2020-07-20 12:40:33,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:33,716 INFO L93 Difference]: Finished difference Result 47272 states and 75401 transitions. [2020-07-20 12:40:33,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:33,716 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-20 12:40:33,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:33,748 INFO L225 Difference]: With dead ends: 47272 [2020-07-20 12:40:33,748 INFO L226 Difference]: Without dead ends: 30591 [2020-07-20 12:40:33,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:33,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30591 states. [2020-07-20 12:40:35,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30591 to 27917. [2020-07-20 12:40:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27917 states. [2020-07-20 12:40:35,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27917 states to 27917 states and 44748 transitions. [2020-07-20 12:40:35,884 INFO L78 Accepts]: Start accepts. Automaton has 27917 states and 44748 transitions. Word has length 502 [2020-07-20 12:40:35,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:35,885 INFO L479 AbstractCegarLoop]: Abstraction has 27917 states and 44748 transitions. [2020-07-20 12:40:35,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:35,885 INFO L276 IsEmpty]: Start isEmpty. Operand 27917 states and 44748 transitions. [2020-07-20 12:40:35,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 12:40:35,901 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:35,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:36,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:36,110 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:36,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash -612346041, now seen corresponding path program 1 times [2020-07-20 12:40:36,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:36,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412765359] [2020-07-20 12:40:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:36,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 3065 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:40:36,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:36,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:36,862 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:36,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412765359] [2020-07-20 12:40:36,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:36,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:40:36,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544607940] [2020-07-20 12:40:36,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:40:36,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:36,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:40:36,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:36,864 INFO L87 Difference]: Start difference. First operand 27917 states and 44748 transitions. Second operand 3 states. [2020-07-20 12:40:38,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:38,808 INFO L93 Difference]: Finished difference Result 81254 states and 130051 transitions. [2020-07-20 12:40:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:40:38,809 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 502 [2020-07-20 12:40:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:38,879 INFO L225 Difference]: With dead ends: 81254 [2020-07-20 12:40:38,880 INFO L226 Difference]: Without dead ends: 53711 [2020-07-20 12:40:38,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:40:38,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53711 states. [2020-07-20 12:40:41,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53711 to 53709. [2020-07-20 12:40:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53709 states. [2020-07-20 12:40:41,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53709 states to 53709 states and 85672 transitions. [2020-07-20 12:40:41,211 INFO L78 Accepts]: Start accepts. Automaton has 53709 states and 85672 transitions. Word has length 502 [2020-07-20 12:40:41,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:41,211 INFO L479 AbstractCegarLoop]: Abstraction has 53709 states and 85672 transitions. [2020-07-20 12:40:41,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:40:41,211 INFO L276 IsEmpty]: Start isEmpty. Operand 53709 states and 85672 transitions. [2020-07-20 12:40:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-20 12:40:41,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:41,246 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:41,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:41,461 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:41,462 INFO L82 PathProgramCache]: Analyzing trace with hash -908406108, now seen corresponding path program 1 times [2020-07-20 12:40:41,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:41,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813268585] [2020-07-20 12:40:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:41,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 3066 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 12:40:41,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:42,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:42,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813268585] [2020-07-20 12:40:42,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:42,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:40:42,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24393191] [2020-07-20 12:40:42,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:40:42,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:42,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:40:42,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:40:42,095 INFO L87 Difference]: Start difference. First operand 53709 states and 85672 transitions. Second operand 4 states. [2020-07-20 12:40:46,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:40:46,870 INFO L93 Difference]: Finished difference Result 153098 states and 243294 transitions. [2020-07-20 12:40:46,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:40:46,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2020-07-20 12:40:46,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:40:46,981 INFO L225 Difference]: With dead ends: 153098 [2020-07-20 12:40:46,982 INFO L226 Difference]: Without dead ends: 103792 [2020-07-20 12:40:47,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:40:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103792 states. [2020-07-20 12:40:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103792 to 56397. [2020-07-20 12:40:49,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56397 states. [2020-07-20 12:40:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56397 states to 56397 states and 90361 transitions. [2020-07-20 12:40:49,871 INFO L78 Accepts]: Start accepts. Automaton has 56397 states and 90361 transitions. Word has length 502 [2020-07-20 12:40:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:40:49,871 INFO L479 AbstractCegarLoop]: Abstraction has 56397 states and 90361 transitions. [2020-07-20 12:40:49,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:40:49,871 INFO L276 IsEmpty]: Start isEmpty. Operand 56397 states and 90361 transitions. [2020-07-20 12:40:49,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 12:40:49,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:40:49,912 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:40:50,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:50,125 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:40:50,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:40:50,126 INFO L82 PathProgramCache]: Analyzing trace with hash 712877757, now seen corresponding path program 1 times [2020-07-20 12:40:50,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:40:50,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715604925] [2020-07-20 12:40:50,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:40:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:40:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 3082 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 12:40:50,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:40:50,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:40:50,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:40:50,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715604925] [2020-07-20 12:40:50,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:40:50,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 12:40:50,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040723438] [2020-07-20 12:40:50,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 12:40:50,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:40:50,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 12:40:50,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 12:40:50,882 INFO L87 Difference]: Start difference. First operand 56397 states and 90361 transitions. Second operand 8 states. [2020-07-20 12:41:00,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:41:00,397 INFO L93 Difference]: Finished difference Result 156938 states and 253532 transitions. [2020-07-20 12:41:00,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 12:41:00,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 504 [2020-07-20 12:41:00,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:41:00,562 INFO L225 Difference]: With dead ends: 156938 [2020-07-20 12:41:00,562 INFO L226 Difference]: Without dead ends: 138344 [2020-07-20 12:41:00,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 12:41:00,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138344 states. [2020-07-20 12:41:04,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138344 to 71497. [2020-07-20 12:41:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71497 states. [2020-07-20 12:41:04,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71497 states to 71497 states and 114433 transitions. [2020-07-20 12:41:04,437 INFO L78 Accepts]: Start accepts. Automaton has 71497 states and 114433 transitions. Word has length 504 [2020-07-20 12:41:04,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:41:04,437 INFO L479 AbstractCegarLoop]: Abstraction has 71497 states and 114433 transitions. [2020-07-20 12:41:04,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 12:41:04,437 INFO L276 IsEmpty]: Start isEmpty. Operand 71497 states and 114433 transitions. [2020-07-20 12:41:04,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-20 12:41:04,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:41:04,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:41:04,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:04,697 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:41:04,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:41:04,698 INFO L82 PathProgramCache]: Analyzing trace with hash 338072247, now seen corresponding path program 1 times [2020-07-20 12:41:04,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:41:04,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956886392] [2020-07-20 12:41:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:05,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:41:05,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 3074 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:41:05,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:41:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:41:05,325 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:41:05,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956886392] [2020-07-20 12:41:05,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:41:05,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:41:05,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29098480] [2020-07-20 12:41:05,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:41:05,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:41:05,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:41:05,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:41:05,327 INFO L87 Difference]: Start difference. First operand 71497 states and 114433 transitions. Second operand 3 states. [2020-07-20 12:41:11,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:41:11,479 INFO L93 Difference]: Finished difference Result 163121 states and 260405 transitions. [2020-07-20 12:41:11,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:41:11,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 504 [2020-07-20 12:41:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:41:11,607 INFO L225 Difference]: With dead ends: 163121 [2020-07-20 12:41:11,607 INFO L226 Difference]: Without dead ends: 103347 [2020-07-20 12:41:11,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:41:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103347 states. [2020-07-20 12:41:16,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103347 to 93629. [2020-07-20 12:41:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93629 states. [2020-07-20 12:41:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93629 states to 93629 states and 150227 transitions. [2020-07-20 12:41:16,831 INFO L78 Accepts]: Start accepts. Automaton has 93629 states and 150227 transitions. Word has length 504 [2020-07-20 12:41:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:41:16,831 INFO L479 AbstractCegarLoop]: Abstraction has 93629 states and 150227 transitions. [2020-07-20 12:41:16,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:41:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 93629 states and 150227 transitions. [2020-07-20 12:41:16,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2020-07-20 12:41:16,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:41:16,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:41:17,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:17,060 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:41:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:41:17,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1714396053, now seen corresponding path program 1 times [2020-07-20 12:41:17,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:41:17,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899373790] [2020-07-20 12:41:17,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:41:17,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 3077 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 12:41:17,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:41:17,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:41:17,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:41:17,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899373790] [2020-07-20 12:41:17,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:41:17,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 12:41:17,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637657751] [2020-07-20 12:41:17,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 12:41:17,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:41:17,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 12:41:17,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 12:41:17,787 INFO L87 Difference]: Start difference. First operand 93629 states and 150227 transitions. Second operand 4 states. [2020-07-20 12:41:28,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:41:28,996 INFO L93 Difference]: Finished difference Result 278684 states and 447330 transitions. [2020-07-20 12:41:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 12:41:28,996 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 505 [2020-07-20 12:41:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:41:29,254 INFO L225 Difference]: With dead ends: 278684 [2020-07-20 12:41:29,254 INFO L226 Difference]: Without dead ends: 185070 [2020-07-20 12:41:29,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 12:41:29,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185070 states. [2020-07-20 12:41:42,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185070 to 185068. [2020-07-20 12:41:42,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185068 states. [2020-07-20 12:41:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185068 states to 185068 states and 296205 transitions. [2020-07-20 12:41:43,024 INFO L78 Accepts]: Start accepts. Automaton has 185068 states and 296205 transitions. Word has length 505 [2020-07-20 12:41:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:41:43,024 INFO L479 AbstractCegarLoop]: Abstraction has 185068 states and 296205 transitions. [2020-07-20 12:41:43,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 12:41:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 185068 states and 296205 transitions. [2020-07-20 12:41:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-20 12:41:43,083 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:41:43,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:41:43,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:43,284 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:41:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:41:43,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1653172198, now seen corresponding path program 1 times [2020-07-20 12:41:43,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:41:43,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562501046] [2020-07-20 12:41:43,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:41:43,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:41:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 3080 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:41:43,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:41:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:41:43,981 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:41:43,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562501046] [2020-07-20 12:41:43,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:41:43,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:41:43,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680997950] [2020-07-20 12:41:43,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:41:43,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:41:43,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:41:43,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:41:43,983 INFO L87 Difference]: Start difference. First operand 185068 states and 296205 transitions. Second operand 3 states. [2020-07-20 12:42:06,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:42:06,719 INFO L93 Difference]: Finished difference Result 549193 states and 878692 transitions. [2020-07-20 12:42:06,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:42:06,719 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 507 [2020-07-20 12:42:06,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:42:07,245 INFO L225 Difference]: With dead ends: 549193 [2020-07-20 12:42:07,246 INFO L226 Difference]: Without dead ends: 365578 [2020-07-20 12:42:07,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:42:07,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365578 states. [2020-07-20 12:42:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365578 to 365576. [2020-07-20 12:42:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365576 states. [2020-07-20 12:42:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365576 states to 365576 states and 583270 transitions. [2020-07-20 12:42:35,064 INFO L78 Accepts]: Start accepts. Automaton has 365576 states and 583270 transitions. Word has length 507 [2020-07-20 12:42:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:42:35,065 INFO L479 AbstractCegarLoop]: Abstraction has 365576 states and 583270 transitions. [2020-07-20 12:42:35,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:42:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 365576 states and 583270 transitions. [2020-07-20 12:42:35,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-20 12:42:35,192 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:42:35,193 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:42:35,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:42:35,394 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:42:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:42:35,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1380680969, now seen corresponding path program 1 times [2020-07-20 12:42:35,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:42:35,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023687310] [2020-07-20 12:42:35,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:42:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:42:35,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 3082 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:42:35,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:42:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:42:36,006 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:42:36,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023687310] [2020-07-20 12:42:36,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:42:36,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:42:36,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723598407] [2020-07-20 12:42:36,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:42:36,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:42:36,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:42:36,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:42:36,008 INFO L87 Difference]: Start difference. First operand 365576 states and 583270 transitions. Second operand 3 states. [2020-07-20 12:43:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:43:29,041 INFO L93 Difference]: Finished difference Result 1095192 states and 1747020 transitions. [2020-07-20 12:43:29,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:43:29,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 508 [2020-07-20 12:43:29,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:43:30,185 INFO L225 Difference]: With dead ends: 1095192 [2020-07-20 12:43:30,185 INFO L226 Difference]: Without dead ends: 729647 [2020-07-20 12:43:30,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:43:31,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729647 states. [2020-07-20 12:44:05,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729647 to 365602. [2020-07-20 12:44:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365602 states. [2020-07-20 12:44:06,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365602 states to 365602 states and 583308 transitions. [2020-07-20 12:44:06,889 INFO L78 Accepts]: Start accepts. Automaton has 365602 states and 583308 transitions. Word has length 508 [2020-07-20 12:44:06,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:44:06,889 INFO L479 AbstractCegarLoop]: Abstraction has 365602 states and 583308 transitions. [2020-07-20 12:44:06,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:44:06,889 INFO L276 IsEmpty]: Start isEmpty. Operand 365602 states and 583308 transitions. [2020-07-20 12:44:07,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-20 12:44:07,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:44:07,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:44:07,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:44:07,214 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:44:07,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:44:07,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1352625557, now seen corresponding path program 1 times [2020-07-20 12:44:07,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:44:07,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601093885] [2020-07-20 12:44:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:44:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:44:07,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 3083 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:44:07,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:44:07,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:44:07,993 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:44:07,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601093885] [2020-07-20 12:44:07,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:44:07,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:44:07,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929158052] [2020-07-20 12:44:07,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:44:07,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:44:07,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:44:07,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:44:07,996 INFO L87 Difference]: Start difference. First operand 365602 states and 583308 transitions. Second operand 3 states. [2020-07-20 12:45:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:45:05,746 INFO L93 Difference]: Finished difference Result 1084970 states and 1729971 transitions. [2020-07-20 12:45:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:45:05,747 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 509 [2020-07-20 12:45:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:45:07,455 INFO L225 Difference]: With dead ends: 1084970 [2020-07-20 12:45:07,455 INFO L226 Difference]: Without dead ends: 720996 [2020-07-20 12:45:07,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:45:08,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720996 states. [2020-07-20 12:46:16,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720996 to 720994. [2020-07-20 12:46:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720994 states. [2020-07-20 12:46:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720994 states to 720994 states and 1145636 transitions. [2020-07-20 12:46:17,548 INFO L78 Accepts]: Start accepts. Automaton has 720994 states and 1145636 transitions. Word has length 509 [2020-07-20 12:46:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:46:17,549 INFO L479 AbstractCegarLoop]: Abstraction has 720994 states and 1145636 transitions. [2020-07-20 12:46:17,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:46:17,549 INFO L276 IsEmpty]: Start isEmpty. Operand 720994 states and 1145636 transitions. [2020-07-20 12:46:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-20 12:46:17,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:46:17,812 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:46:18,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:46:18,013 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:46:18,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:46:18,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1045697850, now seen corresponding path program 1 times [2020-07-20 12:46:18,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:46:18,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140634690] [2020-07-20 12:46:18,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:46:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:46:18,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 3085 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:46:18,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:46:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:46:18,612 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:46:18,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140634690] [2020-07-20 12:46:18,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:46:18,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:46:18,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373231268] [2020-07-20 12:46:18,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:46:18,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:46:18,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:46:18,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:46:18,614 INFO L87 Difference]: Start difference. First operand 720994 states and 1145636 transitions. Second operand 3 states. [2020-07-20 12:48:19,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 12:48:19,359 INFO L93 Difference]: Finished difference Result 2162844 states and 3436677 transitions. [2020-07-20 12:48:19,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 12:48:19,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 509 [2020-07-20 12:48:19,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 12:48:21,597 INFO L225 Difference]: With dead ends: 2162844 [2020-07-20 12:48:21,598 INFO L226 Difference]: Without dead ends: 1441902 [2020-07-20 12:48:22,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 507 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:48:23,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441902 states. [2020-07-20 12:49:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441902 to 721056. [2020-07-20 12:49:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721056 states. [2020-07-20 12:49:53,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721056 states to 721056 states and 1145729 transitions. [2020-07-20 12:49:53,986 INFO L78 Accepts]: Start accepts. Automaton has 721056 states and 1145729 transitions. Word has length 509 [2020-07-20 12:49:53,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 12:49:53,987 INFO L479 AbstractCegarLoop]: Abstraction has 721056 states and 1145729 transitions. [2020-07-20 12:49:53,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 12:49:53,987 INFO L276 IsEmpty]: Start isEmpty. Operand 721056 states and 1145729 transitions. [2020-07-20 12:49:54,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-20 12:49:54,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 12:49:54,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 12:49:54,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:49:54,434 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 12:49:54,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 12:49:54,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1819237864, now seen corresponding path program 1 times [2020-07-20 12:49:54,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 12:49:54,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87451404] [2020-07-20 12:49:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 12:49:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 12:49:54,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 3086 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 12:49:54,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 12:49:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 12:49:55,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 12:49:55,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87451404] [2020-07-20 12:49:55,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 12:49:55,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 12:49:55,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138204489] [2020-07-20 12:49:55,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 12:49:55,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 12:49:55,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 12:49:55,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 12:49:55,048 INFO L87 Difference]: Start difference. First operand 721056 states and 1145729 transitions. Second operand 3 states.