/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:17:27,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:17:27,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:17:27,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:17:27,915 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:17:27,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:17:27,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:17:27,930 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:17:27,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:17:27,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:17:27,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:17:27,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:17:27,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:17:27,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:17:27,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:17:27,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:17:27,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:17:27,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:17:27,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:17:27,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:17:27,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:17:27,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:17:27,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:17:27,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:17:27,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 12:17:27,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 12:17:27,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 12:17:27,975 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 12:17:27,975 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 12:17:27,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-21 12:17:27,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:17:27,983 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:17:27,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:17:27,985 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:17:28,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:17:28,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:17:28,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:17:28,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:17:28,028 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:17:28,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:17:28,028 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:17:28,029 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:17:28,029 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:17:28,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:17:28,029 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:17:28,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:17:28,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:17:28,030 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:17:28,030 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:17:28,030 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:17:28,030 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:17:28,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:17:28,031 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:17:28,031 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:17:28,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:17:28,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:17:28,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:17:28,032 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:17:28,032 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:17:28,032 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:17:28,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:28,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:17:28,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:17:28,033 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 12:17:28,305 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:17:28,318 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:17:28,321 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:17:28,322 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:17:28,323 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:17:28,324 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 12:17:28,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7573153c6/f723be5247f54507a1d94cc03d36c327/FLAG111e89f1b [2020-07-21 12:17:29,081 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:17:29,082 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 12:17:29,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7573153c6/f723be5247f54507a1d94cc03d36c327/FLAG111e89f1b [2020-07-21 12:17:29,184 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7573153c6/f723be5247f54507a1d94cc03d36c327 [2020-07-21 12:17:29,192 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:17:29,195 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:17:29,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:17:29,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:17:29,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:17:29,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:17:29" (1/1) ... [2020-07-21 12:17:29,203 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60ef371f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:29, skipping insertion in model container [2020-07-21 12:17:29,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:17:29" (1/1) ... [2020-07-21 12:17:29,212 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:17:29,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:17:30,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:17:30,779 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:17:31,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:17:31,779 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:17:31,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31 WrapperNode [2020-07-21 12:17:31,780 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:17:31,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:17:31,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:17:31,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:17:31,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,828 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:31,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... [2020-07-21 12:17:32,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:17:32,008 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:17:32,008 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:17:32,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:17:32,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:17:32,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:17:32,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:17:32,084 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:17:32,084 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:17:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:17:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:17:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:17:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:17:32,085 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:17:32,086 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:17:32,086 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:17:32,086 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:17:32,086 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:17:32,087 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:17:32,087 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:17:32,087 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:17:32,087 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 12:17:32,088 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:17:32,088 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:17:32,088 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:17:32,088 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:17:32,089 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:17:35,848 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:17:35,848 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:17:35,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:17:35 BoogieIcfgContainer [2020-07-21 12:17:35,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:17:35,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:17:35,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:17:35,870 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:17:35,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:17:29" (1/3) ... [2020-07-21 12:17:35,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d586fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:17:35, skipping insertion in model container [2020-07-21 12:17:35,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:17:31" (2/3) ... [2020-07-21 12:17:35,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d586fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:17:35, skipping insertion in model container [2020-07-21 12:17:35,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:17:35" (3/3) ... [2020-07-21 12:17:35,877 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-21 12:17:35,889 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:17:35,904 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:17:35,920 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:17:35,955 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:17:35,955 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:17:35,955 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:17:35,955 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:17:35,955 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:17:35,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:17:35,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:17:35,956 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:17:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states. [2020-07-21 12:17:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-21 12:17:36,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:36,057 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] [2020-07-21 12:17:36,057 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:36,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:36,064 INFO L82 PathProgramCache]: Analyzing trace with hash -191467784, now seen corresponding path program 1 times [2020-07-21 12:17:36,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:36,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106398183] [2020-07-21 12:17:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:36,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 2945 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 12:17:36,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:17:36,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:36,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106398183] [2020-07-21 12:17:36,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:36,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:36,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109884001] [2020-07-21 12:17:36,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:36,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:36,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:36,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:36,988 INFO L87 Difference]: Start difference. First operand 1322 states. Second operand 3 states. [2020-07-21 12:17:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:37,351 INFO L93 Difference]: Finished difference Result 2212 states and 3947 transitions. [2020-07-21 12:17:37,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:37,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2020-07-21 12:17:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:37,403 INFO L225 Difference]: With dead ends: 2212 [2020-07-21 12:17:37,404 INFO L226 Difference]: Without dead ends: 1956 [2020-07-21 12:17:37,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2020-07-21 12:17:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1954. [2020-07-21 12:17:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1954 states. [2020-07-21 12:17:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1954 states to 1954 states and 3183 transitions. [2020-07-21 12:17:37,616 INFO L78 Accepts]: Start accepts. Automaton has 1954 states and 3183 transitions. Word has length 467 [2020-07-21 12:17:37,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:37,618 INFO L479 AbstractCegarLoop]: Abstraction has 1954 states and 3183 transitions. [2020-07-21 12:17:37,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:37,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1954 states and 3183 transitions. [2020-07-21 12:17:37,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-21 12:17:37,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:37,632 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] [2020-07-21 12:17:37,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:37,847 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:37,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:37,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1227921449, now seen corresponding path program 1 times [2020-07-21 12:17:37,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:37,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445147722] [2020-07-21 12:17:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:38,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 2946 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:17:38,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:17:38,727 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:38,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445147722] [2020-07-21 12:17:38,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:38,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:17:38,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928290129] [2020-07-21 12:17:38,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:17:38,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:38,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:17:38,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:17:38,732 INFO L87 Difference]: Start difference. First operand 1954 states and 3183 transitions. Second operand 4 states. [2020-07-21 12:17:39,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:39,089 INFO L93 Difference]: Finished difference Result 5793 states and 9438 transitions. [2020-07-21 12:17:39,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:17:39,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2020-07-21 12:17:39,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:39,112 INFO L225 Difference]: With dead ends: 5793 [2020-07-21 12:17:39,112 INFO L226 Difference]: Without dead ends: 3856 [2020-07-21 12:17:39,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:17:39,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3856 states. [2020-07-21 12:17:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3856 to 3854. [2020-07-21 12:17:39,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3854 states. [2020-07-21 12:17:39,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3854 states to 3854 states and 6254 transitions. [2020-07-21 12:17:39,299 INFO L78 Accepts]: Start accepts. Automaton has 3854 states and 6254 transitions. Word has length 467 [2020-07-21 12:17:39,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:39,300 INFO L479 AbstractCegarLoop]: Abstraction has 3854 states and 6254 transitions. [2020-07-21 12:17:39,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:17:39,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3854 states and 6254 transitions. [2020-07-21 12:17:39,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2020-07-21 12:17:39,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:39,313 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] [2020-07-21 12:17:39,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:39,515 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:39,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:39,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1934187579, now seen corresponding path program 1 times [2020-07-21 12:17:39,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:39,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579782126] [2020-07-21 12:17:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:39,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:40,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 2949 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:40,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:17:40,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:40,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579782126] [2020-07-21 12:17:40,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:40,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:40,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849382858] [2020-07-21 12:17:40,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:40,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:40,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:40,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:40,268 INFO L87 Difference]: Start difference. First operand 3854 states and 6254 transitions. Second operand 3 states. [2020-07-21 12:17:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:40,732 INFO L93 Difference]: Finished difference Result 11260 states and 18231 transitions. [2020-07-21 12:17:40,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:40,733 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 469 [2020-07-21 12:17:40,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:40,782 INFO L225 Difference]: With dead ends: 11260 [2020-07-21 12:17:40,782 INFO L226 Difference]: Without dead ends: 7620 [2020-07-21 12:17:40,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7620 states. [2020-07-21 12:17:41,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7620 to 7618. [2020-07-21 12:17:41,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7618 states. [2020-07-21 12:17:41,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7618 states to 7618 states and 12321 transitions. [2020-07-21 12:17:41,290 INFO L78 Accepts]: Start accepts. Automaton has 7618 states and 12321 transitions. Word has length 469 [2020-07-21 12:17:41,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:41,291 INFO L479 AbstractCegarLoop]: Abstraction has 7618 states and 12321 transitions. [2020-07-21 12:17:41,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:41,291 INFO L276 IsEmpty]: Start isEmpty. Operand 7618 states and 12321 transitions. [2020-07-21 12:17:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 12:17:41,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:41,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:17:41,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:41,527 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:41,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:41,528 INFO L82 PathProgramCache]: Analyzing trace with hash -269242540, now seen corresponding path program 1 times [2020-07-21 12:17:41,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:41,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497979720] [2020-07-21 12:17:41,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:41,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 2951 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:41,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:17:42,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:42,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497979720] [2020-07-21 12:17:42,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:42,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:42,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889104476] [2020-07-21 12:17:42,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:42,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:42,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:42,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:42,196 INFO L87 Difference]: Start difference. First operand 7618 states and 12321 transitions. Second operand 3 states. [2020-07-21 12:17:42,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:42,633 INFO L93 Difference]: Finished difference Result 22757 states and 36795 transitions. [2020-07-21 12:17:42,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:42,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2020-07-21 12:17:42,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:42,732 INFO L225 Difference]: With dead ends: 22757 [2020-07-21 12:17:42,732 INFO L226 Difference]: Without dead ends: 15191 [2020-07-21 12:17:42,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15191 states. [2020-07-21 12:17:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15191 to 7665. [2020-07-21 12:17:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7665 states. [2020-07-21 12:17:43,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7665 states to 7665 states and 12395 transitions. [2020-07-21 12:17:43,251 INFO L78 Accepts]: Start accepts. Automaton has 7665 states and 12395 transitions. Word has length 470 [2020-07-21 12:17:43,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:43,252 INFO L479 AbstractCegarLoop]: Abstraction has 7665 states and 12395 transitions. [2020-07-21 12:17:43,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:43,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7665 states and 12395 transitions. [2020-07-21 12:17:43,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-21 12:17:43,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:43,272 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] [2020-07-21 12:17:43,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:43,486 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:43,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:43,487 INFO L82 PathProgramCache]: Analyzing trace with hash -335154176, now seen corresponding path program 1 times [2020-07-21 12:17:43,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:43,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959592517] [2020-07-21 12:17:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:43,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 2952 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:44,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:17:44,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:44,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959592517] [2020-07-21 12:17:44,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:44,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:44,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905210473] [2020-07-21 12:17:44,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:44,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:44,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:44,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:44,741 INFO L87 Difference]: Start difference. First operand 7665 states and 12395 transitions. Second operand 3 states. [2020-07-21 12:17:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:45,396 INFO L93 Difference]: Finished difference Result 22272 states and 35912 transitions. [2020-07-21 12:17:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:45,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-21 12:17:45,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:45,448 INFO L225 Difference]: With dead ends: 22272 [2020-07-21 12:17:45,448 INFO L226 Difference]: Without dead ends: 15006 [2020-07-21 12:17:45,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:45,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15006 states. [2020-07-21 12:17:46,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15006 to 15004. [2020-07-21 12:17:46,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15004 states. [2020-07-21 12:17:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15004 states to 15004 states and 24145 transitions. [2020-07-21 12:17:46,163 INFO L78 Accepts]: Start accepts. Automaton has 15004 states and 24145 transitions. Word has length 471 [2020-07-21 12:17:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:46,165 INFO L479 AbstractCegarLoop]: Abstraction has 15004 states and 24145 transitions. [2020-07-21 12:17:46,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:46,173 INFO L276 IsEmpty]: Start isEmpty. Operand 15004 states and 24145 transitions. [2020-07-21 12:17:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-21 12:17:46,208 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:46,209 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] [2020-07-21 12:17:46,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:46,423 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:46,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:46,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1765810725, now seen corresponding path program 1 times [2020-07-21 12:17:46,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:46,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2928506] [2020-07-21 12:17:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:46,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 2954 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:46,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:17:46,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:46,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2928506] [2020-07-21 12:17:46,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:46,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:46,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437615824] [2020-07-21 12:17:46,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:46,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:46,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:46,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:46,989 INFO L87 Difference]: Start difference. First operand 15004 states and 24145 transitions. Second operand 3 states. [2020-07-21 12:17:47,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:47,787 INFO L93 Difference]: Finished difference Result 44756 states and 71990 transitions. [2020-07-21 12:17:47,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:47,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-21 12:17:47,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:47,861 INFO L225 Difference]: With dead ends: 44756 [2020-07-21 12:17:47,861 INFO L226 Difference]: Without dead ends: 29896 [2020-07-21 12:17:47,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:47,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29896 states. [2020-07-21 12:17:48,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29896 to 15102. [2020-07-21 12:17:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15102 states. [2020-07-21 12:17:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15102 states to 15102 states and 24296 transitions. [2020-07-21 12:17:49,018 INFO L78 Accepts]: Start accepts. Automaton has 15102 states and 24296 transitions. Word has length 471 [2020-07-21 12:17:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:49,018 INFO L479 AbstractCegarLoop]: Abstraction has 15102 states and 24296 transitions. [2020-07-21 12:17:49,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 15102 states and 24296 transitions. [2020-07-21 12:17:49,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-21 12:17:49,055 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:49,055 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] [2020-07-21 12:17:49,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:49,269 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:49,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2067493155, now seen corresponding path program 1 times [2020-07-21 12:17:49,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:49,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783908858] [2020-07-21 12:17:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 2955 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:49,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:17:49,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:49,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783908858] [2020-07-21 12:17:49,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:49,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:49,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977002365] [2020-07-21 12:17:49,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:49,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:49,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:49,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:49,960 INFO L87 Difference]: Start difference. First operand 15102 states and 24296 transitions. Second operand 3 states. [2020-07-21 12:17:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:51,428 INFO L93 Difference]: Finished difference Result 44891 states and 72171 transitions. [2020-07-21 12:17:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:51,428 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2020-07-21 12:17:51,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:51,509 INFO L225 Difference]: With dead ends: 44891 [2020-07-21 12:17:51,509 INFO L226 Difference]: Without dead ends: 30013 [2020-07-21 12:17:51,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:51,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30013 states. [2020-07-21 12:17:52,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30013 to 15219. [2020-07-21 12:17:52,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15219 states. [2020-07-21 12:17:52,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15219 states to 15219 states and 24442 transitions. [2020-07-21 12:17:52,094 INFO L78 Accepts]: Start accepts. Automaton has 15219 states and 24442 transitions. Word has length 472 [2020-07-21 12:17:52,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:52,094 INFO L479 AbstractCegarLoop]: Abstraction has 15219 states and 24442 transitions. [2020-07-21 12:17:52,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:52,094 INFO L276 IsEmpty]: Start isEmpty. Operand 15219 states and 24442 transitions. [2020-07-21 12:17:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 12:17:52,121 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:52,121 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] [2020-07-21 12:17:52,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:52,337 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:52,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1974730661, now seen corresponding path program 1 times [2020-07-21 12:17:52,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:52,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193537415] [2020-07-21 12:17:52,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:52,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:52,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 2955 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:17:52,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:17:53,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:53,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193537415] [2020-07-21 12:17:53,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:53,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:17:53,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343123274] [2020-07-21 12:17:53,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:17:53,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:53,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:17:53,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:53,338 INFO L87 Difference]: Start difference. First operand 15219 states and 24442 transitions. Second operand 3 states. [2020-07-21 12:17:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:54,097 INFO L93 Difference]: Finished difference Result 43846 states and 70265 transitions. [2020-07-21 12:17:54,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:17:54,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 473 [2020-07-21 12:17:54,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:54,152 INFO L225 Difference]: With dead ends: 43846 [2020-07-21 12:17:54,152 INFO L226 Difference]: Without dead ends: 29596 [2020-07-21 12:17:54,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:17:54,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29596 states. [2020-07-21 12:17:55,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29596 to 29594. [2020-07-21 12:17:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29594 states. [2020-07-21 12:17:55,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29594 states to 29594 states and 47307 transitions. [2020-07-21 12:17:55,290 INFO L78 Accepts]: Start accepts. Automaton has 29594 states and 47307 transitions. Word has length 473 [2020-07-21 12:17:55,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:17:55,290 INFO L479 AbstractCegarLoop]: Abstraction has 29594 states and 47307 transitions. [2020-07-21 12:17:55,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:17:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 29594 states and 47307 transitions. [2020-07-21 12:17:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 12:17:55,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:17:55,317 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] [2020-07-21 12:17:55,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:55,523 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:17:55,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:17:55,524 INFO L82 PathProgramCache]: Analyzing trace with hash -382866648, now seen corresponding path program 1 times [2020-07-21 12:17:55,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:17:55,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129019398] [2020-07-21 12:17:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:17:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:17:56,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 2956 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:17:56,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:17:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:17:56,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:17:56,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129019398] [2020-07-21 12:17:56,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:17:56,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:17:56,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502815501] [2020-07-21 12:17:56,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:17:56,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:17:56,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:17:56,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:17:56,255 INFO L87 Difference]: Start difference. First operand 29594 states and 47307 transitions. Second operand 4 states. [2020-07-21 12:17:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:17:58,136 INFO L93 Difference]: Finished difference Result 83580 states and 133043 transitions. [2020-07-21 12:17:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:17:58,136 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-21 12:17:58,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:17:58,227 INFO L225 Difference]: With dead ends: 83580 [2020-07-21 12:17:58,228 INFO L226 Difference]: Without dead ends: 56266 [2020-07-21 12:17:58,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:17:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56266 states. [2020-07-21 12:18:00,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56266 to 30887. [2020-07-21 12:18:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30887 states. [2020-07-21 12:18:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30887 states to 30887 states and 49586 transitions. [2020-07-21 12:18:00,545 INFO L78 Accepts]: Start accepts. Automaton has 30887 states and 49586 transitions. Word has length 473 [2020-07-21 12:18:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:00,545 INFO L479 AbstractCegarLoop]: Abstraction has 30887 states and 49586 transitions. [2020-07-21 12:18:00,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:18:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 30887 states and 49586 transitions. [2020-07-21 12:18:00,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 12:18:00,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:00,572 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] [2020-07-21 12:18:00,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:00,787 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:00,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:00,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1912996694, now seen corresponding path program 1 times [2020-07-21 12:18:00,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:00,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646509635] [2020-07-21 12:18:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:01,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 2963 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:01,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:01,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:01,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646509635] [2020-07-21 12:18:01,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:01,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:01,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520310794] [2020-07-21 12:18:01,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:01,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:01,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:01,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:01,514 INFO L87 Difference]: Start difference. First operand 30887 states and 49586 transitions. Second operand 3 states. [2020-07-21 12:18:02,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:02,903 INFO L93 Difference]: Finished difference Result 85630 states and 136255 transitions. [2020-07-21 12:18:02,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:02,904 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-21 12:18:02,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:02,998 INFO L225 Difference]: With dead ends: 85630 [2020-07-21 12:18:02,999 INFO L226 Difference]: Without dead ends: 58296 [2020-07-21 12:18:03,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:03,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58296 states. [2020-07-21 12:18:04,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58296 to 31334. [2020-07-21 12:18:04,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31334 states. [2020-07-21 12:18:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31334 states to 31334 states and 50261 transitions. [2020-07-21 12:18:04,684 INFO L78 Accepts]: Start accepts. Automaton has 31334 states and 50261 transitions. Word has length 476 [2020-07-21 12:18:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:04,685 INFO L479 AbstractCegarLoop]: Abstraction has 31334 states and 50261 transitions. [2020-07-21 12:18:04,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:04,685 INFO L276 IsEmpty]: Start isEmpty. Operand 31334 states and 50261 transitions. [2020-07-21 12:18:04,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 12:18:04,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:04,723 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] [2020-07-21 12:18:04,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:04,937 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:04,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1584229236, now seen corresponding path program 1 times [2020-07-21 12:18:04,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:04,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656348960] [2020-07-21 12:18:04,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:05,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 2964 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:05,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:05,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:05,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656348960] [2020-07-21 12:18:05,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:05,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:05,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428455689] [2020-07-21 12:18:05,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:05,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:05,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:05,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:05,709 INFO L87 Difference]: Start difference. First operand 31334 states and 50261 transitions. Second operand 3 states. [2020-07-21 12:18:07,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:07,278 INFO L93 Difference]: Finished difference Result 86359 states and 137304 transitions. [2020-07-21 12:18:07,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:07,278 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 477 [2020-07-21 12:18:07,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:07,346 INFO L225 Difference]: With dead ends: 86359 [2020-07-21 12:18:07,347 INFO L226 Difference]: Without dead ends: 58911 [2020-07-21 12:18:07,386 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:07,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58911 states. [2020-07-21 12:18:09,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58911 to 31981. [2020-07-21 12:18:09,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31981 states. [2020-07-21 12:18:09,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31981 states to 31981 states and 51201 transitions. [2020-07-21 12:18:09,800 INFO L78 Accepts]: Start accepts. Automaton has 31981 states and 51201 transitions. Word has length 477 [2020-07-21 12:18:09,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:09,800 INFO L479 AbstractCegarLoop]: Abstraction has 31981 states and 51201 transitions. [2020-07-21 12:18:09,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:09,800 INFO L276 IsEmpty]: Start isEmpty. Operand 31981 states and 51201 transitions. [2020-07-21 12:18:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 12:18:09,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:09,823 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] [2020-07-21 12:18:10,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:10,036 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:10,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash 545046366, now seen corresponding path program 1 times [2020-07-21 12:18:10,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:10,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188566304] [2020-07-21 12:18:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:10,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 2965 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:10,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:10,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:10,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188566304] [2020-07-21 12:18:10,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:10,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:10,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329768339] [2020-07-21 12:18:10,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:10,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:10,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:10,656 INFO L87 Difference]: Start difference. First operand 31981 states and 51201 transitions. Second operand 3 states. [2020-07-21 12:18:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:12,643 INFO L93 Difference]: Finished difference Result 87271 states and 138488 transitions. [2020-07-21 12:18:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:12,643 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 12:18:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:12,704 INFO L225 Difference]: With dead ends: 87271 [2020-07-21 12:18:12,704 INFO L226 Difference]: Without dead ends: 59765 [2020-07-21 12:18:12,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59765 states. [2020-07-21 12:18:14,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59765 to 32835. [2020-07-21 12:18:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32835 states. [2020-07-21 12:18:14,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32835 states to 32835 states and 52263 transitions. [2020-07-21 12:18:14,435 INFO L78 Accepts]: Start accepts. Automaton has 32835 states and 52263 transitions. Word has length 478 [2020-07-21 12:18:14,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:14,435 INFO L479 AbstractCegarLoop]: Abstraction has 32835 states and 52263 transitions. [2020-07-21 12:18:14,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:18:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 32835 states and 52263 transitions. [2020-07-21 12:18:14,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 12:18:14,458 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:14,458 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] [2020-07-21 12:18:14,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:14,659 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:14,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:14,660 INFO L82 PathProgramCache]: Analyzing trace with hash 355992395, now seen corresponding path program 1 times [2020-07-21 12:18:14,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:14,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287437932] [2020-07-21 12:18:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:15,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 2975 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:18:15,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:15,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:15,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:15,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287437932] [2020-07-21 12:18:15,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:15,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:18:15,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606368542] [2020-07-21 12:18:15,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:18:15,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:15,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:18:15,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:18:15,424 INFO L87 Difference]: Start difference. First operand 32835 states and 52263 transitions. Second operand 5 states. [2020-07-21 12:18:18,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:18,618 INFO L93 Difference]: Finished difference Result 54061 states and 85216 transitions. [2020-07-21 12:18:18,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:18:18,619 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 479 [2020-07-21 12:18:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:18,661 INFO L225 Difference]: With dead ends: 54061 [2020-07-21 12:18:18,662 INFO L226 Difference]: Without dead ends: 32835 [2020-07-21 12:18:18,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:18:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32835 states. [2020-07-21 12:18:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32835 to 32835. [2020-07-21 12:18:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32835 states. [2020-07-21 12:18:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32835 states to 32835 states and 51871 transitions. [2020-07-21 12:18:19,964 INFO L78 Accepts]: Start accepts. Automaton has 32835 states and 51871 transitions. Word has length 479 [2020-07-21 12:18:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:19,965 INFO L479 AbstractCegarLoop]: Abstraction has 32835 states and 51871 transitions. [2020-07-21 12:18:19,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:18:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 32835 states and 51871 transitions. [2020-07-21 12:18:19,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 12:18:19,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:19,990 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] [2020-07-21 12:18:20,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:20,191 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:20,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:20,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1017913424, now seen corresponding path program 1 times [2020-07-21 12:18:20,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:20,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398294521] [2020-07-21 12:18:20,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:20,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 2978 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 12:18:20,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:20,983 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-07-21 12:18:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:21,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:21,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398294521] [2020-07-21 12:18:21,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:21,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-21 12:18:21,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103919445] [2020-07-21 12:18:21,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 12:18:21,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:21,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 12:18:21,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-07-21 12:18:21,943 INFO L87 Difference]: Start difference. First operand 32835 states and 51871 transitions. Second operand 17 states. [2020-07-21 12:18:25,581 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37 [2020-07-21 12:18:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:32,504 INFO L93 Difference]: Finished difference Result 74954 states and 117087 transitions. [2020-07-21 12:18:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 12:18:32,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 479 [2020-07-21 12:18:32,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:32,576 INFO L225 Difference]: With dead ends: 74954 [2020-07-21 12:18:32,576 INFO L226 Difference]: Without dead ends: 68288 [2020-07-21 12:18:32,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=352, Invalid=1054, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 12:18:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68288 states. [2020-07-21 12:18:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68288 to 35431. [2020-07-21 12:18:34,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35431 states. [2020-07-21 12:18:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35431 states to 35431 states and 55667 transitions. [2020-07-21 12:18:34,874 INFO L78 Accepts]: Start accepts. Automaton has 35431 states and 55667 transitions. Word has length 479 [2020-07-21 12:18:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:34,875 INFO L479 AbstractCegarLoop]: Abstraction has 35431 states and 55667 transitions. [2020-07-21 12:18:34,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 12:18:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 35431 states and 55667 transitions. [2020-07-21 12:18:34,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-21 12:18:34,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:34,903 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] [2020-07-21 12:18:35,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:35,110 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:35,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:35,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1908068521, now seen corresponding path program 1 times [2020-07-21 12:18:35,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:35,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355332966] [2020-07-21 12:18:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:35,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 2976 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:18:35,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:35,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:35,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355332966] [2020-07-21 12:18:35,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:35,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:18:35,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039673550] [2020-07-21 12:18:35,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:18:35,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:35,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:18:35,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:18:35,824 INFO L87 Difference]: Start difference. First operand 35431 states and 55667 transitions. Second operand 4 states. [2020-07-21 12:18:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:40,917 INFO L93 Difference]: Finished difference Result 104299 states and 163896 transitions. [2020-07-21 12:18:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:18:40,918 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2020-07-21 12:18:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:40,984 INFO L225 Difference]: With dead ends: 104299 [2020-07-21 12:18:40,985 INFO L226 Difference]: Without dead ends: 69131 [2020-07-21 12:18:41,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:18:41,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69131 states. [2020-07-21 12:18:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69131 to 69129. [2020-07-21 12:18:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69129 states. [2020-07-21 12:18:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69129 states to 69129 states and 108187 transitions. [2020-07-21 12:18:44,901 INFO L78 Accepts]: Start accepts. Automaton has 69129 states and 108187 transitions. Word has length 479 [2020-07-21 12:18:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:18:44,902 INFO L479 AbstractCegarLoop]: Abstraction has 69129 states and 108187 transitions. [2020-07-21 12:18:44,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:18:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 69129 states and 108187 transitions. [2020-07-21 12:18:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 12:18:44,951 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:18:44,951 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] [2020-07-21 12:18:45,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:45,152 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:18:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:18:45,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1705678533, now seen corresponding path program 1 times [2020-07-21 12:18:45,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:18:45,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572350038] [2020-07-21 12:18:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:18:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:18:45,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 2979 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:18:45,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:18:45,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:18:45,824 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:18:45,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572350038] [2020-07-21 12:18:45,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:18:45,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:18:45,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111622994] [2020-07-21 12:18:45,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:18:45,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:18:45,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:18:45,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:45,826 INFO L87 Difference]: Start difference. First operand 69129 states and 108187 transitions. Second operand 3 states. [2020-07-21 12:18:55,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:18:55,118 INFO L93 Difference]: Finished difference Result 200827 states and 313184 transitions. [2020-07-21 12:18:55,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:18:55,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 12:18:55,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:18:55,263 INFO L225 Difference]: With dead ends: 200827 [2020-07-21 12:18:55,263 INFO L226 Difference]: Without dead ends: 135266 [2020-07-21 12:18:55,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:18:55,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135266 states. [2020-07-21 12:19:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135266 to 135264. [2020-07-21 12:19:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135264 states. [2020-07-21 12:19:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135264 states to 135264 states and 210445 transitions. [2020-07-21 12:19:03,511 INFO L78 Accepts]: Start accepts. Automaton has 135264 states and 210445 transitions. Word has length 481 [2020-07-21 12:19:03,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:19:03,512 INFO L479 AbstractCegarLoop]: Abstraction has 135264 states and 210445 transitions. [2020-07-21 12:19:03,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:19:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 135264 states and 210445 transitions. [2020-07-21 12:19:03,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 12:19:03,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:19:03,613 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] [2020-07-21 12:19:03,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:03,814 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:19:03,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:19:03,815 INFO L82 PathProgramCache]: Analyzing trace with hash -965322689, now seen corresponding path program 1 times [2020-07-21 12:19:03,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:19:03,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081475224] [2020-07-21 12:19:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:19:04,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 2970 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:19:04,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:19:06,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:19:06,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:19:06,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081475224] [2020-07-21 12:19:06,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:19:06,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:19:06,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295744856] [2020-07-21 12:19:06,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:19:06,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:19:06,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:19:06,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:19:06,434 INFO L87 Difference]: Start difference. First operand 135264 states and 210445 transitions. Second operand 3 states. [2020-07-21 12:19:21,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:19:21,657 INFO L93 Difference]: Finished difference Result 397448 states and 617337 transitions. [2020-07-21 12:19:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:19:21,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 12:19:21,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:19:21,925 INFO L225 Difference]: With dead ends: 397448 [2020-07-21 12:19:21,926 INFO L226 Difference]: Without dead ends: 266198 [2020-07-21 12:19:22,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:19:22,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266198 states. [2020-07-21 12:19:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266198 to 266196. [2020-07-21 12:19:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266196 states. [2020-07-21 12:19:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266196 states to 266196 states and 412215 transitions. [2020-07-21 12:19:42,222 INFO L78 Accepts]: Start accepts. Automaton has 266196 states and 412215 transitions. Word has length 481 [2020-07-21 12:19:42,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:19:42,223 INFO L479 AbstractCegarLoop]: Abstraction has 266196 states and 412215 transitions. [2020-07-21 12:19:42,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:19:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 266196 states and 412215 transitions. [2020-07-21 12:19:42,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 12:19:42,439 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:19:42,440 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] [2020-07-21 12:19:42,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:42,641 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:19:42,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:19:42,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1236102340, now seen corresponding path program 1 times [2020-07-21 12:19:42,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:19:42,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306513770] [2020-07-21 12:19:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:19:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:19:43,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 2973 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:19:43,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:19:43,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:19:43,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:19:43,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306513770] [2020-07-21 12:19:43,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:19:43,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:19:43,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450822493] [2020-07-21 12:19:43,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:19:43,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:19:43,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:19:43,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:19:43,302 INFO L87 Difference]: Start difference. First operand 266196 states and 412215 transitions. Second operand 3 states. [2020-07-21 12:20:23,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:20:23,256 INFO L93 Difference]: Finished difference Result 777731 states and 1201310 transitions. [2020-07-21 12:20:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:20:23,257 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 12:20:23,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:20:24,418 INFO L225 Difference]: With dead ends: 777731 [2020-07-21 12:20:24,418 INFO L226 Difference]: Without dead ends: 523211 [2020-07-21 12:20:24,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:20:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523211 states. [2020-07-21 12:21:05,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523211 to 523209. [2020-07-21 12:21:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523209 states. [2020-07-21 12:21:06,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523209 states to 523209 states and 805938 transitions. [2020-07-21 12:21:06,524 INFO L78 Accepts]: Start accepts. Automaton has 523209 states and 805938 transitions. Word has length 483 [2020-07-21 12:21:06,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:21:06,525 INFO L479 AbstractCegarLoop]: Abstraction has 523209 states and 805938 transitions. [2020-07-21 12:21:06,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:21:06,525 INFO L276 IsEmpty]: Start isEmpty. Operand 523209 states and 805938 transitions. [2020-07-21 12:21:06,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 12:21:06,976 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:21:06,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:21:07,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:07,178 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:21:07,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:21:07,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1332731591, now seen corresponding path program 1 times [2020-07-21 12:21:07,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:21:07,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168507487] [2020-07-21 12:21:07,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:21:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:21:07,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 2974 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:21:07,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:21:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:21:07,804 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:21:07,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168507487] [2020-07-21 12:21:07,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:21:07,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:21:07,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571010225] [2020-07-21 12:21:07,805 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:21:07,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:21:07,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:21:07,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:21:07,806 INFO L87 Difference]: Start difference. First operand 523209 states and 805938 transitions. Second operand 4 states. [2020-07-21 12:22:25,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:22:25,738 INFO L93 Difference]: Finished difference Result 1457055 states and 2235208 transitions. [2020-07-21 12:22:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:22:25,740 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-07-21 12:22:25,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:22:27,098 INFO L225 Difference]: With dead ends: 1457055 [2020-07-21 12:22:27,099 INFO L226 Difference]: Without dead ends: 973149 [2020-07-21 12:22:27,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:22:28,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973149 states. [2020-07-21 12:23:27,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973149 to 537573. [2020-07-21 12:23:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537573 states. [2020-07-21 12:23:28,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537573 states to 537573 states and 831499 transitions. [2020-07-21 12:23:28,582 INFO L78 Accepts]: Start accepts. Automaton has 537573 states and 831499 transitions. Word has length 483 [2020-07-21 12:23:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:23:28,582 INFO L479 AbstractCegarLoop]: Abstraction has 537573 states and 831499 transitions. [2020-07-21 12:23:28,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:23:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 537573 states and 831499 transitions. [2020-07-21 12:23:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 12:23:30,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:23:30,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:23:30,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:30,472 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:23:30,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:23:30,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1445880981, now seen corresponding path program 1 times [2020-07-21 12:23:30,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:23:30,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170938247] [2020-07-21 12:23:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:23:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:23:30,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 2982 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:23:30,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:23:31,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:23:31,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:23:31,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170938247] [2020-07-21 12:23:31,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:23:31,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:23:31,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156462629] [2020-07-21 12:23:31,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:23:31,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:23:31,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:23:31,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:23:31,114 INFO L87 Difference]: Start difference. First operand 537573 states and 831499 transitions. Second operand 4 states. [2020-07-21 12:25:01,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:25:01,386 INFO L93 Difference]: Finished difference Result 1387652 states and 2122458 transitions. [2020-07-21 12:25:01,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:25:01,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-07-21 12:25:01,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:25:02,707 INFO L225 Difference]: With dead ends: 1387652 [2020-07-21 12:25:02,707 INFO L226 Difference]: Without dead ends: 970818 [2020-07-21 12:25:03,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:25:03,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970818 states. [2020-07-21 12:26:04,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970818 to 583962. [2020-07-21 12:26:04,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583962 states. [2020-07-21 12:26:05,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583962 states to 583962 states and 909601 transitions. [2020-07-21 12:26:05,699 INFO L78 Accepts]: Start accepts. Automaton has 583962 states and 909601 transitions. Word has length 487 [2020-07-21 12:26:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:05,699 INFO L479 AbstractCegarLoop]: Abstraction has 583962 states and 909601 transitions. [2020-07-21 12:26:05,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:26:05,699 INFO L276 IsEmpty]: Start isEmpty. Operand 583962 states and 909601 transitions. [2020-07-21 12:26:07,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 12:26:07,767 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:07,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:26:07,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:07,969 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:07,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:07,969 INFO L82 PathProgramCache]: Analyzing trace with hash 390651312, now seen corresponding path program 1 times [2020-07-21 12:26:07,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:07,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493298140] [2020-07-21 12:26:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:08,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 2995 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:26:08,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:08,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:26:08,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:08,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493298140] [2020-07-21 12:26:08,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:08,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:26:08,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032179406] [2020-07-21 12:26:08,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:26:08,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:08,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:26:08,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:08,579 INFO L87 Difference]: Start difference. First operand 583962 states and 909601 transitions. Second operand 3 states. [2020-07-21 12:27:35,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:35,818 INFO L93 Difference]: Finished difference Result 1512356 states and 2345385 transitions. [2020-07-21 12:27:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:27:35,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 12:27:35,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:37,393 INFO L225 Difference]: With dead ends: 1512356 [2020-07-21 12:27:37,394 INFO L226 Difference]: Without dead ends: 1047846 [2020-07-21 12:27:49,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:27:50,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047846 states.