/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 12:26:34,878 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 12:26:34,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 12:26:34,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 12:26:34,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:26:34,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:26:34,903 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:26:34,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:26:34,916 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:26:34,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:26:34,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:26:34,923 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:26:34,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:26:34,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:26:34,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:26:34,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:26:34,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:26:34,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:26:34,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:26:34,937 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:26:34,942 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:26:34,945 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:26:34,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:26:34,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:26:34,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:26:34,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:26:34,960 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:26:34,961 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:26:34,962 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 12:26:34,987 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:26:34,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:26:34,993 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:26:34,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:26:34,993 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:26:34,994 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:26:34,994 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:26:34,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:26:34,995 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:26:34,995 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:26:34,996 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:26:34,996 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:26:34,996 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:26:34,997 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:26:34,997 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:26:34,997 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:26:34,997 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:26:34,998 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:26:34,998 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:26:34,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:26:34,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:26:35,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:26:35,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:26:35,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:26:35,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:26:35,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:26:35,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:35,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:26:35,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:26:35,003 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 12:26:35,269 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:26:35,289 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:26:35,292 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:26:35,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:26:35,296 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:26:35,297 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 12:26:35,379 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb4ae0ed9/a872d38a52664738938a97ee338fa6b6/FLAG391ab6b9d [2020-07-21 12:26:36,137 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:26:36,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 12:26:36,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb4ae0ed9/a872d38a52664738938a97ee338fa6b6/FLAG391ab6b9d [2020-07-21 12:26:36,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb4ae0ed9/a872d38a52664738938a97ee338fa6b6 [2020-07-21 12:26:36,363 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:26:36,366 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:26:36,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:26:36,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:26:36,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:26:36,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:26:36" (1/1) ... [2020-07-21 12:26:36,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19a51889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:26:36, skipping insertion in model container [2020-07-21 12:26:36,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:26:36" (1/1) ... [2020-07-21 12:26:36,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:26:36,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:26:38,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:26:38,184 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:26:39,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:26:39,871 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:26:39,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:26:39 WrapperNode [2020-07-21 12:26:39,872 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:26:39,873 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:26:39,873 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:26:39,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:26:39,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:26:39" (1/1) ... [2020-07-21 12:26:39,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:26:39" (1/1) ... [2020-07-21 12:26:39,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:26:39" (1/1) ... [2020-07-21 12:26:39,966 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:26:39" (1/1) ... [2020-07-21 12:26:40,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:26:39" (1/1) ... [2020-07-21 12:26:40,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:26:39" (1/1) ... [2020-07-21 12:26:40,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:26:39" (1/1) ... [2020-07-21 12:26:40,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:26:40,154 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:26:40,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:26:40,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:26:40,156 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:26:39" (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 12:26:40,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:26:40,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:26:40,248 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 12:26:40,248 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:26:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:26:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 12:26:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 12:26:40,249 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 12:26:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 12:26:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 12:26:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 12:26:40,250 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 12:26:40,251 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 12:26:40,251 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 12:26:40,251 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 12:26:40,251 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 12:26:40,252 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 12:26:40,252 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 12:26:40,252 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 12:26:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:26:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:26:40,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:26:44,478 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:26:44,479 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:26:44,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:26:44 BoogieIcfgContainer [2020-07-21 12:26:44,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:26:44,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:26:44,494 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:26:44,498 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:26:44,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:26:36" (1/3) ... [2020-07-21 12:26:44,499 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9041e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:26:44, skipping insertion in model container [2020-07-21 12:26:44,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:26:39" (2/3) ... [2020-07-21 12:26:44,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d9041e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:26:44, skipping insertion in model container [2020-07-21 12:26:44,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:26:44" (3/3) ... [2020-07-21 12:26:44,502 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 12:26:44,514 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:26:44,525 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 12:26:44,542 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 12:26:44,574 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:26:44,574 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:26:44,574 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:26:44,575 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:26:44,575 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:26:44,575 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:26:44,575 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:26:44,575 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:26:44,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states. [2020-07-21 12:26:44,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 12:26:44,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:44,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:26:44,657 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:44,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times [2020-07-21 12:26:44,674 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:44,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411692124] [2020-07-21 12:26:44,675 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 12:26:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:45,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 3107 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:26:45,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:45,926 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 12:26:45,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:45,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411692124] [2020-07-21 12:26:45,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:45,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:26:45,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970956140] [2020-07-21 12:26:45,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:26:45,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:45,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:26:45,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:26:45,950 INFO L87 Difference]: Start difference. First operand 1484 states. Second operand 4 states. [2020-07-21 12:26:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:26:46,467 INFO L93 Difference]: Finished difference Result 4394 states and 7936 transitions. [2020-07-21 12:26:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:26:46,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2020-07-21 12:26:46,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:26:46,506 INFO L225 Difference]: With dead ends: 4394 [2020-07-21 12:26:46,506 INFO L226 Difference]: Without dead ends: 2919 [2020-07-21 12:26:46,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:26:46,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2020-07-21 12:26:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2865. [2020-07-21 12:26:46,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-07-21 12:26:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4721 transitions. [2020-07-21 12:26:46,729 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4721 transitions. Word has length 484 [2020-07-21 12:26:46,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:46,731 INFO L479 AbstractCegarLoop]: Abstraction has 2865 states and 4721 transitions. [2020-07-21 12:26:46,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:26:46,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4721 transitions. [2020-07-21 12:26:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 12:26:46,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:46,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 12:26:46,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:46,963 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:46,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1721765960, now seen corresponding path program 1 times [2020-07-21 12:26:46,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:46,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855771614] [2020-07-21 12:26:46,966 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 12:26:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:47,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 3110 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:26:47,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:47,874 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 12:26:47,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:47,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855771614] [2020-07-21 12:26:47,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:47,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:26:47,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396856225] [2020-07-21 12:26:47,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:26:47,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:47,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:26:47,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:47,880 INFO L87 Difference]: Start difference. First operand 2865 states and 4721 transitions. Second operand 3 states. [2020-07-21 12:26:48,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:26:48,231 INFO L93 Difference]: Finished difference Result 8316 states and 13666 transitions. [2020-07-21 12:26:48,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:26:48,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 12:26:48,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:26:48,272 INFO L225 Difference]: With dead ends: 8316 [2020-07-21 12:26:48,363 INFO L226 Difference]: Without dead ends: 5665 [2020-07-21 12:26:48,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:48,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2020-07-21 12:26:48,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5613. [2020-07-21 12:26:48,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5613 states. [2020-07-21 12:26:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5613 states to 5613 states and 9225 transitions. [2020-07-21 12:26:48,659 INFO L78 Accepts]: Start accepts. Automaton has 5613 states and 9225 transitions. Word has length 486 [2020-07-21 12:26:48,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:48,661 INFO L479 AbstractCegarLoop]: Abstraction has 5613 states and 9225 transitions. [2020-07-21 12:26:48,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:26:48,662 INFO L276 IsEmpty]: Start isEmpty. Operand 5613 states and 9225 transitions. [2020-07-21 12:26:48,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 12:26:48,703 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:48,708 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 12:26:48,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:48,922 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:48,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:48,924 INFO L82 PathProgramCache]: Analyzing trace with hash 326918239, now seen corresponding path program 1 times [2020-07-21 12:26:48,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:48,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217600046] [2020-07-21 12:26:48,925 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 12:26:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:49,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 3112 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:26:49,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:26:49,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:49,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217600046] [2020-07-21 12:26:49,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:49,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:26:49,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159247962] [2020-07-21 12:26:49,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:26:49,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:49,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:26:49,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:49,962 INFO L87 Difference]: Start difference. First operand 5613 states and 9225 transitions. Second operand 3 states. [2020-07-21 12:26:50,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:26:50,408 INFO L93 Difference]: Finished difference Result 16742 states and 27507 transitions. [2020-07-21 12:26:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:26:50,409 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-21 12:26:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:26:50,471 INFO L225 Difference]: With dead ends: 16742 [2020-07-21 12:26:50,472 INFO L226 Difference]: Without dead ends: 11181 [2020-07-21 12:26:50,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11181 states. [2020-07-21 12:26:50,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11181 to 5660. [2020-07-21 12:26:50,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5660 states. [2020-07-21 12:26:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5660 states to 5660 states and 9299 transitions. [2020-07-21 12:26:50,800 INFO L78 Accepts]: Start accepts. Automaton has 5660 states and 9299 transitions. Word has length 487 [2020-07-21 12:26:50,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:50,800 INFO L479 AbstractCegarLoop]: Abstraction has 5660 states and 9299 transitions. [2020-07-21 12:26:50,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:26:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states and 9299 transitions. [2020-07-21 12:26:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 12:26:50,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:50,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:26:51,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:51,036 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:51,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2064835293, now seen corresponding path program 1 times [2020-07-21 12:26:51,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:51,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341440833] [2020-07-21 12:26:51,039 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 12:26:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:51,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 3113 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:26:51,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:51,922 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 12:26:51,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:51,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341440833] [2020-07-21 12:26:51,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:51,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:26:51,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650867933] [2020-07-21 12:26:51,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:26:51,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:51,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:26:51,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:51,925 INFO L87 Difference]: Start difference. First operand 5660 states and 9299 transitions. Second operand 3 states. [2020-07-21 12:26:52,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:26:52,382 INFO L93 Difference]: Finished difference Result 16304 states and 26694 transitions. [2020-07-21 12:26:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:26:52,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 12:26:52,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:26:52,450 INFO L225 Difference]: With dead ends: 16304 [2020-07-21 12:26:52,451 INFO L226 Difference]: Without dead ends: 11043 [2020-07-21 12:26:52,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:52,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2020-07-21 12:26:52,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10993. [2020-07-21 12:26:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10993 states. [2020-07-21 12:26:53,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10993 states to 10993 states and 17977 transitions. [2020-07-21 12:26:53,014 INFO L78 Accepts]: Start accepts. Automaton has 10993 states and 17977 transitions. Word has length 488 [2020-07-21 12:26:53,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:53,015 INFO L479 AbstractCegarLoop]: Abstraction has 10993 states and 17977 transitions. [2020-07-21 12:26:53,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:26:53,016 INFO L276 IsEmpty]: Start isEmpty. Operand 10993 states and 17977 transitions. [2020-07-21 12:26:53,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 12:26:53,058 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:53,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:26:53,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:53,274 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:53,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:53,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1928250536, now seen corresponding path program 1 times [2020-07-21 12:26:53,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:53,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913096381] [2020-07-21 12:26:53,276 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 12:26:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:54,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 3115 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:26:54,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:54,477 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 12:26:54,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:54,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913096381] [2020-07-21 12:26:54,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:54,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:26:54,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832334675] [2020-07-21 12:26:54,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:26:54,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:54,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:26:54,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:54,481 INFO L87 Difference]: Start difference. First operand 10993 states and 17977 transitions. Second operand 3 states. [2020-07-21 12:26:54,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:26:54,979 INFO L93 Difference]: Finished difference Result 32723 states and 53486 transitions. [2020-07-21 12:26:54,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:26:54,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 488 [2020-07-21 12:26:54,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:26:55,041 INFO L225 Difference]: With dead ends: 32723 [2020-07-21 12:26:55,041 INFO L226 Difference]: Without dead ends: 21874 [2020-07-21 12:26:55,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21874 states. [2020-07-21 12:26:55,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21874 to 11091. [2020-07-21 12:26:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11091 states. [2020-07-21 12:26:55,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11091 states to 11091 states and 18128 transitions. [2020-07-21 12:26:55,609 INFO L78 Accepts]: Start accepts. Automaton has 11091 states and 18128 transitions. Word has length 488 [2020-07-21 12:26:55,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:55,610 INFO L479 AbstractCegarLoop]: Abstraction has 11091 states and 18128 transitions. [2020-07-21 12:26:55,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:26:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 11091 states and 18128 transitions. [2020-07-21 12:26:55,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 12:26:55,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:55,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:26:55,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:55,850 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:55,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:55,850 INFO L82 PathProgramCache]: Analyzing trace with hash 844567664, now seen corresponding path program 1 times [2020-07-21 12:26:55,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:55,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333908161] [2020-07-21 12:26:55,851 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 12:26:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:56,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 3116 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:26:56,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:56,571 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 12:26:56,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:56,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333908161] [2020-07-21 12:26:56,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:56,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:26:56,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413809616] [2020-07-21 12:26:56,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:26:56,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:56,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:26:56,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:56,574 INFO L87 Difference]: Start difference. First operand 11091 states and 18128 transitions. Second operand 3 states. [2020-07-21 12:26:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:26:57,418 INFO L93 Difference]: Finished difference Result 32858 states and 53667 transitions. [2020-07-21 12:26:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:26:57,419 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 12:26:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:26:57,467 INFO L225 Difference]: With dead ends: 32858 [2020-07-21 12:26:57,467 INFO L226 Difference]: Without dead ends: 21991 [2020-07-21 12:26:57,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:26:57,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21991 states. [2020-07-21 12:26:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21991 to 11208. [2020-07-21 12:26:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11208 states. [2020-07-21 12:26:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11208 states to 11208 states and 18274 transitions. [2020-07-21 12:26:57,956 INFO L78 Accepts]: Start accepts. Automaton has 11208 states and 18274 transitions. Word has length 489 [2020-07-21 12:26:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:26:57,956 INFO L479 AbstractCegarLoop]: Abstraction has 11208 states and 18274 transitions. [2020-07-21 12:26:57,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:26:57,957 INFO L276 IsEmpty]: Start isEmpty. Operand 11208 states and 18274 transitions. [2020-07-21 12:26:57,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 12:26:57,977 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:26:57,978 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 12:26:58,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:26:58,192 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:26:58,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:26:58,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2127508510, now seen corresponding path program 1 times [2020-07-21 12:26:58,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:26:58,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851226691] [2020-07-21 12:26:58,195 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 12:26:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:26:58,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 3126 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:26:58,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:26:59,532 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 12:26:59,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:26:59,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851226691] [2020-07-21 12:26:59,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:26:59,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:26:59,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300050677] [2020-07-21 12:26:59,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:26:59,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:26:59,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:26:59,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:26:59,535 INFO L87 Difference]: Start difference. First operand 11208 states and 18274 transitions. Second operand 8 states. [2020-07-21 12:27:03,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:03,193 INFO L93 Difference]: Finished difference Result 26441 states and 42615 transitions. [2020-07-21 12:27:03,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:27:03,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 490 [2020-07-21 12:27:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:03,229 INFO L225 Difference]: With dead ends: 26441 [2020-07-21 12:27:03,229 INFO L226 Difference]: Without dead ends: 19934 [2020-07-21 12:27:03,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:27:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19934 states. [2020-07-21 12:27:03,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19934 to 14056. [2020-07-21 12:27:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14056 states. [2020-07-21 12:27:03,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14056 states to 14056 states and 22586 transitions. [2020-07-21 12:27:03,872 INFO L78 Accepts]: Start accepts. Automaton has 14056 states and 22586 transitions. Word has length 490 [2020-07-21 12:27:03,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:03,873 INFO L479 AbstractCegarLoop]: Abstraction has 14056 states and 22586 transitions. [2020-07-21 12:27:03,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:27:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 14056 states and 22586 transitions. [2020-07-21 12:27:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 12:27:03,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:03,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:27:04,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:04,115 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:04,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:04,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1322384757, now seen corresponding path program 1 times [2020-07-21 12:27:04,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:04,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627863424] [2020-07-21 12:27:04,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:27:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:04,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 3122 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:27:04,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:04,860 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 12:27:04,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:04,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627863424] [2020-07-21 12:27:04,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:04,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:27:04,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701313608] [2020-07-21 12:27:04,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:27:04,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:04,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:27:04,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:27:04,863 INFO L87 Difference]: Start difference. First operand 14056 states and 22586 transitions. Second operand 3 states. [2020-07-21 12:27:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:05,498 INFO L93 Difference]: Finished difference Result 26553 states and 42172 transitions. [2020-07-21 12:27:05,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:27:05,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 12:27:05,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:05,536 INFO L225 Difference]: With dead ends: 26553 [2020-07-21 12:27:05,536 INFO L226 Difference]: Without dead ends: 17046 [2020-07-21 12:27:05,559 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 12:27:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17046 states. [2020-07-21 12:27:06,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17046 to 14924. [2020-07-21 12:27:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14924 states. [2020-07-21 12:27:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14924 states to 14924 states and 24026 transitions. [2020-07-21 12:27:06,167 INFO L78 Accepts]: Start accepts. Automaton has 14924 states and 24026 transitions. Word has length 490 [2020-07-21 12:27:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:06,167 INFO L479 AbstractCegarLoop]: Abstraction has 14924 states and 24026 transitions. [2020-07-21 12:27:06,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:27:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 14924 states and 24026 transitions. [2020-07-21 12:27:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 12:27:06,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:06,189 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 12:27:06,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:06,391 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:06,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:06,392 INFO L82 PathProgramCache]: Analyzing trace with hash -667258338, now seen corresponding path program 1 times [2020-07-21 12:27:06,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:06,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534963567] [2020-07-21 12:27:06,393 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 12:27:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:06,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 3116 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:27:07,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:07,816 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 12:27:07,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:07,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534963567] [2020-07-21 12:27:07,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:07,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:27:07,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630415276] [2020-07-21 12:27:07,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:27:07,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:07,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:27:07,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:27:07,819 INFO L87 Difference]: Start difference. First operand 14924 states and 24026 transitions. Second operand 3 states. [2020-07-21 12:27:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:08,735 INFO L93 Difference]: Finished difference Result 42944 states and 68975 transitions. [2020-07-21 12:27:08,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:27:08,738 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-21 12:27:08,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:08,793 INFO L225 Difference]: With dead ends: 42944 [2020-07-21 12:27:08,793 INFO L226 Difference]: Without dead ends: 28989 [2020-07-21 12:27:08,827 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 12:27:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28989 states. [2020-07-21 12:27:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28989 to 28941. [2020-07-21 12:27:09,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28941 states. [2020-07-21 12:27:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28941 states to 28941 states and 46387 transitions. [2020-07-21 12:27:09,994 INFO L78 Accepts]: Start accepts. Automaton has 28941 states and 46387 transitions. Word has length 490 [2020-07-21 12:27:09,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:09,995 INFO L479 AbstractCegarLoop]: Abstraction has 28941 states and 46387 transitions. [2020-07-21 12:27:09,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:27:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 28941 states and 46387 transitions. [2020-07-21 12:27:10,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 12:27:10,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:10,017 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 12:27:10,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:10,227 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:10,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:10,228 INFO L82 PathProgramCache]: Analyzing trace with hash 656055547, now seen corresponding path program 1 times [2020-07-21 12:27:10,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:10,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988871577] [2020-07-21 12:27:10,229 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 12:27:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:10,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 3117 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:27:10,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:27:10,948 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:10,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988871577] [2020-07-21 12:27:10,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:10,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:27:10,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558413556] [2020-07-21 12:27:10,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:27:10,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:10,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:27:10,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:27:10,949 INFO L87 Difference]: Start difference. First operand 28941 states and 46387 transitions. Second operand 4 states. [2020-07-21 12:27:12,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:12,817 INFO L93 Difference]: Finished difference Result 81921 states and 130751 transitions. [2020-07-21 12:27:12,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:27:12,818 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-07-21 12:27:12,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:12,889 INFO L225 Difference]: With dead ends: 81921 [2020-07-21 12:27:12,889 INFO L226 Difference]: Without dead ends: 55260 [2020-07-21 12:27:12,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:27:12,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55260 states. [2020-07-21 12:27:14,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55260 to 30234. [2020-07-21 12:27:14,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30234 states. [2020-07-21 12:27:14,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30234 states to 30234 states and 48666 transitions. [2020-07-21 12:27:14,363 INFO L78 Accepts]: Start accepts. Automaton has 30234 states and 48666 transitions. Word has length 490 [2020-07-21 12:27:14,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:14,364 INFO L479 AbstractCegarLoop]: Abstraction has 30234 states and 48666 transitions. [2020-07-21 12:27:14,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:27:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 30234 states and 48666 transitions. [2020-07-21 12:27:14,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 12:27:14,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:14,389 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:27:14,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:14,605 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:14,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:14,606 INFO L82 PathProgramCache]: Analyzing trace with hash 12438715, now seen corresponding path program 1 times [2020-07-21 12:27:14,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:14,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235462459] [2020-07-21 12:27:14,607 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 12:27:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:15,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 3137 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:27:15,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:15,531 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 12:27:15,531 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:15,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235462459] [2020-07-21 12:27:15,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:15,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:27:15,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935974299] [2020-07-21 12:27:15,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:27:15,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:15,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:27:15,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:27:15,533 INFO L87 Difference]: Start difference. First operand 30234 states and 48666 transitions. Second operand 8 states. [2020-07-21 12:27:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:20,780 INFO L93 Difference]: Finished difference Result 65137 states and 104563 transitions. [2020-07-21 12:27:20,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:27:20,781 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 492 [2020-07-21 12:27:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:20,859 INFO L225 Difference]: With dead ends: 65137 [2020-07-21 12:27:20,860 INFO L226 Difference]: Without dead ends: 55924 [2020-07-21 12:27:20,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:27:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55924 states. [2020-07-21 12:27:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55924 to 36110. [2020-07-21 12:27:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36110 states. [2020-07-21 12:27:22,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36110 states to 36110 states and 57922 transitions. [2020-07-21 12:27:22,415 INFO L78 Accepts]: Start accepts. Automaton has 36110 states and 57922 transitions. Word has length 492 [2020-07-21 12:27:22,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:22,416 INFO L479 AbstractCegarLoop]: Abstraction has 36110 states and 57922 transitions. [2020-07-21 12:27:22,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:27:22,416 INFO L276 IsEmpty]: Start isEmpty. Operand 36110 states and 57922 transitions. [2020-07-21 12:27:22,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 12:27:22,454 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:22,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:27:22,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:22,665 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:22,666 INFO L82 PathProgramCache]: Analyzing trace with hash -520305017, now seen corresponding path program 1 times [2020-07-21 12:27:22,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:22,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120467868] [2020-07-21 12:27:22,667 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 12:27:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:23,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 3125 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:27:23,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:23,388 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 12:27:23,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:23,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120467868] [2020-07-21 12:27:23,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:23,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:27:23,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703548773] [2020-07-21 12:27:23,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:27:23,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:23,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:27:23,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:27:23,391 INFO L87 Difference]: Start difference. First operand 36110 states and 57922 transitions. Second operand 3 states. [2020-07-21 12:27:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:25,614 INFO L93 Difference]: Finished difference Result 72850 states and 115987 transitions. [2020-07-21 12:27:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:27:25,615 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 12:27:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:25,672 INFO L225 Difference]: With dead ends: 72850 [2020-07-21 12:27:25,672 INFO L226 Difference]: Without dead ends: 47345 [2020-07-21 12:27:25,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:27:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47345 states. [2020-07-21 12:27:28,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47345 to 42606. [2020-07-21 12:27:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42606 states. [2020-07-21 12:27:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42606 states to 42606 states and 68446 transitions. [2020-07-21 12:27:28,731 INFO L78 Accepts]: Start accepts. Automaton has 42606 states and 68446 transitions. Word has length 492 [2020-07-21 12:27:28,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:28,732 INFO L479 AbstractCegarLoop]: Abstraction has 42606 states and 68446 transitions. [2020-07-21 12:27:28,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:27:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 42606 states and 68446 transitions. [2020-07-21 12:27:28,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 12:27:28,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:28,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:27:28,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:28,959 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:28,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1733524636, now seen corresponding path program 1 times [2020-07-21 12:27:28,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:28,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180622508] [2020-07-21 12:27:28,960 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 12:27:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:29,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 3127 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:27:29,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:29,796 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 12:27:29,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:29,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180622508] [2020-07-21 12:27:29,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:29,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:27:29,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324587361] [2020-07-21 12:27:29,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:27:29,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:29,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:27:29,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:27:29,798 INFO L87 Difference]: Start difference. First operand 42606 states and 68446 transitions. Second operand 5 states. [2020-07-21 12:27:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:32,659 INFO L93 Difference]: Finished difference Result 75455 states and 120163 transitions. [2020-07-21 12:27:32,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:27:32,660 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 493 [2020-07-21 12:27:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:32,710 INFO L225 Difference]: With dead ends: 75455 [2020-07-21 12:27:32,710 INFO L226 Difference]: Without dead ends: 42606 [2020-07-21 12:27:32,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:27:32,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42606 states. [2020-07-21 12:27:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42606 to 42606. [2020-07-21 12:27:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42606 states. [2020-07-21 12:27:34,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42606 states to 42606 states and 67950 transitions. [2020-07-21 12:27:34,953 INFO L78 Accepts]: Start accepts. Automaton has 42606 states and 67950 transitions. Word has length 493 [2020-07-21 12:27:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:34,954 INFO L479 AbstractCegarLoop]: Abstraction has 42606 states and 67950 transitions. [2020-07-21 12:27:34,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:27:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 42606 states and 67950 transitions. [2020-07-21 12:27:34,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 12:27:34,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:34,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:27:35,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:35,180 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:35,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:35,181 INFO L82 PathProgramCache]: Analyzing trace with hash -128473503, now seen corresponding path program 1 times [2020-07-21 12:27:35,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:35,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778444368] [2020-07-21 12:27:35,182 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 12:27:35,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:35,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 3128 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:27:35,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:36,040 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 12:27:36,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:36,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778444368] [2020-07-21 12:27:36,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:36,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:27:36,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634510863] [2020-07-21 12:27:36,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:27:36,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:36,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:27:36,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:27:36,042 INFO L87 Difference]: Start difference. First operand 42606 states and 67950 transitions. Second operand 4 states. [2020-07-21 12:27:39,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:39,398 INFO L93 Difference]: Finished difference Result 88228 states and 140837 transitions. [2020-07-21 12:27:39,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:27:39,398 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-07-21 12:27:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:39,454 INFO L225 Difference]: With dead ends: 88228 [2020-07-21 12:27:39,454 INFO L226 Difference]: Without dead ends: 47109 [2020-07-21 12:27:39,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:27:39,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47109 states. [2020-07-21 12:27:41,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47109 to 42589. [2020-07-21 12:27:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42589 states. [2020-07-21 12:27:41,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42589 states to 42589 states and 67863 transitions. [2020-07-21 12:27:41,596 INFO L78 Accepts]: Start accepts. Automaton has 42589 states and 67863 transitions. Word has length 493 [2020-07-21 12:27:41,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:41,596 INFO L479 AbstractCegarLoop]: Abstraction has 42589 states and 67863 transitions. [2020-07-21 12:27:41,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:27:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 42589 states and 67863 transitions. [2020-07-21 12:27:41,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 12:27:41,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:41,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:27:41,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:41,829 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:41,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:41,830 INFO L82 PathProgramCache]: Analyzing trace with hash 905972161, now seen corresponding path program 1 times [2020-07-21 12:27:41,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:41,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340432933] [2020-07-21 12:27:41,832 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 12:27:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:42,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 3128 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:27:42,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:42,528 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 12:27:42,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:42,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340432933] [2020-07-21 12:27:42,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:42,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:27:42,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074566829] [2020-07-21 12:27:42,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:27:42,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:42,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:27:42,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:27:42,531 INFO L87 Difference]: Start difference. First operand 42589 states and 67863 transitions. Second operand 3 states. [2020-07-21 12:27:45,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:45,781 INFO L93 Difference]: Finished difference Result 95820 states and 152107 transitions. [2020-07-21 12:27:45,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:27:45,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 494 [2020-07-21 12:27:45,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:45,853 INFO L225 Difference]: With dead ends: 95820 [2020-07-21 12:27:45,853 INFO L226 Difference]: Without dead ends: 64211 [2020-07-21 12:27:45,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:27:45,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64211 states. [2020-07-21 12:27:50,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64211 to 58385. [2020-07-21 12:27:50,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58385 states. [2020-07-21 12:27:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58385 states to 58385 states and 93073 transitions. [2020-07-21 12:27:50,381 INFO L78 Accepts]: Start accepts. Automaton has 58385 states and 93073 transitions. Word has length 494 [2020-07-21 12:27:50,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:27:50,382 INFO L479 AbstractCegarLoop]: Abstraction has 58385 states and 93073 transitions. [2020-07-21 12:27:50,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:27:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 58385 states and 93073 transitions. [2020-07-21 12:27:50,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 12:27:50,405 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:27:50,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:27:50,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:27:50,606 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:27:50,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:27:50,607 INFO L82 PathProgramCache]: Analyzing trace with hash -581287731, now seen corresponding path program 1 times [2020-07-21 12:27:50,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:27:50,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437682040] [2020-07-21 12:27:50,608 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 12:27:51,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:27:51,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 3131 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:27:51,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:27:51,420 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 12:27:51,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:27:51,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437682040] [2020-07-21 12:27:51,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:27:51,420 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 12:27:51,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882469332] [2020-07-21 12:27:51,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 12:27:51,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:27:51,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 12:27:51,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 12:27:51,422 INFO L87 Difference]: Start difference. First operand 58385 states and 93073 transitions. Second operand 4 states. [2020-07-21 12:27:57,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:27:57,824 INFO L93 Difference]: Finished difference Result 172553 states and 275216 transitions. [2020-07-21 12:27:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 12:27:57,825 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-07-21 12:27:57,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:27:57,957 INFO L225 Difference]: With dead ends: 172553 [2020-07-21 12:27:57,957 INFO L226 Difference]: Without dead ends: 114863 [2020-07-21 12:27:58,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:27:58,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114863 states. [2020-07-21 12:28:06,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114863 to 114833. [2020-07-21 12:28:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114833 states. [2020-07-21 12:28:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114833 states to 114833 states and 182653 transitions. [2020-07-21 12:28:06,405 INFO L78 Accepts]: Start accepts. Automaton has 114833 states and 182653 transitions. Word has length 495 [2020-07-21 12:28:06,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:28:06,406 INFO L479 AbstractCegarLoop]: Abstraction has 114833 states and 182653 transitions. [2020-07-21 12:28:06,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 12:28:06,406 INFO L276 IsEmpty]: Start isEmpty. Operand 114833 states and 182653 transitions. [2020-07-21 12:28:06,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 12:28:06,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:28:06,447 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:28:06,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:28:06,648 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:28:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:28:06,649 INFO L82 PathProgramCache]: Analyzing trace with hash 232421937, now seen corresponding path program 1 times [2020-07-21 12:28:06,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:28:06,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912108668] [2020-07-21 12:28:06,650 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 12:28:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:28:07,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 3134 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:28:07,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:28:07,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:28:07,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:28:07,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912108668] [2020-07-21 12:28:07,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:28:07,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:28:07,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358284300] [2020-07-21 12:28:07,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:28:07,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:28:07,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:28:07,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:28:07,430 INFO L87 Difference]: Start difference. First operand 114833 states and 182653 transitions. Second operand 3 states. [2020-07-21 12:28:22,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:28:22,187 INFO L93 Difference]: Finished difference Result 339057 states and 539788 transitions. [2020-07-21 12:28:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:28:22,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-21 12:28:22,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:28:22,545 INFO L225 Difference]: With dead ends: 339057 [2020-07-21 12:28:22,545 INFO L226 Difference]: Without dead ends: 225820 [2020-07-21 12:28:22,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:28:22,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225820 states. [2020-07-21 12:28:39,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225820 to 225787. [2020-07-21 12:28:39,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225787 states. [2020-07-21 12:28:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225787 states to 225787 states and 358509 transitions. [2020-07-21 12:28:39,541 INFO L78 Accepts]: Start accepts. Automaton has 225787 states and 358509 transitions. Word has length 497 [2020-07-21 12:28:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:28:39,542 INFO L479 AbstractCegarLoop]: Abstraction has 225787 states and 358509 transitions. [2020-07-21 12:28:39,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:28:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 225787 states and 358509 transitions. [2020-07-21 12:28:39,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 12:28:39,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:28:39,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:28:39,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:28:39,877 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:28:39,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:28:39,878 INFO L82 PathProgramCache]: Analyzing trace with hash -180504028, now seen corresponding path program 1 times [2020-07-21 12:28:39,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:28:39,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405958575] [2020-07-21 12:28:39,879 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 12:28:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:28:40,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 3136 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:28:40,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:28:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:28:41,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:28:41,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405958575] [2020-07-21 12:28:41,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:28:41,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:28:41,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713722122] [2020-07-21 12:28:41,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:28:41,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:28:41,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:28:41,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:28:41,120 INFO L87 Difference]: Start difference. First operand 225787 states and 358509 transitions. Second operand 3 states. [2020-07-21 12:29:10,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:29:10,885 INFO L93 Difference]: Finished difference Result 674972 states and 1071609 transitions. [2020-07-21 12:29:10,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:29:10,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 12:29:10,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:29:11,502 INFO L225 Difference]: With dead ends: 674972 [2020-07-21 12:29:11,503 INFO L226 Difference]: Without dead ends: 450057 [2020-07-21 12:29:12,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:12,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450057 states. [2020-07-21 12:29:34,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450057 to 226027. [2020-07-21 12:29:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226027 states. [2020-07-21 12:29:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226027 states to 226027 states and 358871 transitions. [2020-07-21 12:29:34,922 INFO L78 Accepts]: Start accepts. Automaton has 226027 states and 358871 transitions. Word has length 498 [2020-07-21 12:29:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:29:34,922 INFO L479 AbstractCegarLoop]: Abstraction has 226027 states and 358871 transitions. [2020-07-21 12:29:34,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:29:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 226027 states and 358871 transitions. [2020-07-21 12:29:35,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 12:29:35,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:29:35,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:29:35,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:29:35,229 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:29:35,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:29:35,230 INFO L82 PathProgramCache]: Analyzing trace with hash 944292662, now seen corresponding path program 1 times [2020-07-21 12:29:35,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:29:35,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611795030] [2020-07-21 12:29:35,231 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 12:29:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:29:35,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 3137 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:29:35,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:29:36,015 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 12:29:36,016 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:29:36,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611795030] [2020-07-21 12:29:36,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:29:36,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:29:36,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645150505] [2020-07-21 12:29:36,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:29:36,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:29:36,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:29:36,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:29:36,018 INFO L87 Difference]: Start difference. First operand 226027 states and 358871 transitions. Second operand 3 states. [2020-07-21 12:30:09,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:30:09,458 INFO L93 Difference]: Finished difference Result 669977 states and 1063881 transitions. [2020-07-21 12:30:09,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:30:09,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 12:30:09,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:30:10,088 INFO L225 Difference]: With dead ends: 669977 [2020-07-21 12:30:10,088 INFO L226 Difference]: Without dead ends: 445875 [2020-07-21 12:30:10,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:30:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445875 states. [2020-07-21 12:30:50,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445875 to 445847. [2020-07-21 12:30:50,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 445847 states. [2020-07-21 12:30:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445847 states to 445847 states and 705889 transitions. [2020-07-21 12:30:51,338 INFO L78 Accepts]: Start accepts. Automaton has 445847 states and 705889 transitions. Word has length 499 [2020-07-21 12:30:51,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:30:51,339 INFO L479 AbstractCegarLoop]: Abstraction has 445847 states and 705889 transitions. [2020-07-21 12:30:51,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:30:51,339 INFO L276 IsEmpty]: Start isEmpty. Operand 445847 states and 705889 transitions. [2020-07-21 12:30:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 12:30:52,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:30:52,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:30:52,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:30:52,696 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:30:52,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:30:52,697 INFO L82 PathProgramCache]: Analyzing trace with hash -312371439, now seen corresponding path program 1 times [2020-07-21 12:30:52,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:30:52,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612894889] [2020-07-21 12:30:52,698 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 12:30:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:30:53,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 3139 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:30:53,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:30:53,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 12:30:53,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:30:53,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612894889] [2020-07-21 12:30:53,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:30:53,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:30:53,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467497043] [2020-07-21 12:30:53,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:30:53,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:30:53,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:30:53,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:30:53,364 INFO L87 Difference]: Start difference. First operand 445847 states and 705889 transitions. Second operand 3 states. [2020-07-21 12:32:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:32:08,175 INFO L93 Difference]: Finished difference Result 1335070 states and 2113676 transitions. [2020-07-21 12:32:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:32:08,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 499 [2020-07-21 12:32:08,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:32:09,574 INFO L225 Difference]: With dead ends: 1335070 [2020-07-21 12:32:09,575 INFO L226 Difference]: Without dead ends: 890313 [2020-07-21 12:32:10,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:32:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890313 states. [2020-07-21 12:32:56,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890313 to 446654. [2020-07-21 12:32:56,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 446654 states. [2020-07-21 12:32:58,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446654 states to 446654 states and 707092 transitions. [2020-07-21 12:32:58,098 INFO L78 Accepts]: Start accepts. Automaton has 446654 states and 707092 transitions. Word has length 499 [2020-07-21 12:32:58,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:32:58,098 INFO L479 AbstractCegarLoop]: Abstraction has 446654 states and 707092 transitions. [2020-07-21 12:32:58,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:32:58,098 INFO L276 IsEmpty]: Start isEmpty. Operand 446654 states and 707092 transitions. [2020-07-21 12:32:58,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 12:32:58,276 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:32:58,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:32:58,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:32:58,478 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:32:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:32:58,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1741583693, now seen corresponding path program 1 times [2020-07-21 12:32:58,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:32:58,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399219335] [2020-07-21 12:32:58,479 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 12:32:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:32:59,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 3140 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 12:32:59,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:32:59,180 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 12:32:59,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:32:59,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399219335] [2020-07-21 12:32:59,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:32:59,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 12:32:59,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178311223] [2020-07-21 12:32:59,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 12:32:59,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:32:59,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 12:32:59,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:32:59,182 INFO L87 Difference]: Start difference. First operand 446654 states and 707092 transitions. Second operand 3 states. [2020-07-21 12:34:12,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:34:12,095 INFO L93 Difference]: Finished difference Result 1335504 states and 2114028 transitions. [2020-07-21 12:34:12,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 12:34:12,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 500 [2020-07-21 12:34:12,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:34:13,370 INFO L225 Difference]: With dead ends: 1335504 [2020-07-21 12:34:13,371 INFO L226 Difference]: Without dead ends: 890819 [2020-07-21 12:34:13,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 12:34:24,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890819 states. [2020-07-21 12:35:10,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890819 to 447842. [2020-07-21 12:35:10,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447842 states. [2020-07-21 12:35:10,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447842 states to 447842 states and 708640 transitions. [2020-07-21 12:35:10,852 INFO L78 Accepts]: Start accepts. Automaton has 447842 states and 708640 transitions. Word has length 500 [2020-07-21 12:35:10,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:35:10,852 INFO L479 AbstractCegarLoop]: Abstraction has 447842 states and 708640 transitions. [2020-07-21 12:35:10,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 12:35:10,852 INFO L276 IsEmpty]: Start isEmpty. Operand 447842 states and 708640 transitions. [2020-07-21 12:35:11,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2020-07-21 12:35:11,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:35:11,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:35:11,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:35:11,256 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:35:11,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:35:11,257 INFO L82 PathProgramCache]: Analyzing trace with hash -619186825, now seen corresponding path program 1 times [2020-07-21 12:35:11,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:35:11,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457074059] [2020-07-21 12:35:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:35:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 12:35:11,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 3154 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 12:35:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:35:12,247 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 12:35:12,247 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:35:12,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457074059] [2020-07-21 12:35:12,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:35:12,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 12:35:12,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407358671] [2020-07-21 12:35:12,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:35:12,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:35:12,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:35:12,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:35:12,249 INFO L87 Difference]: Start difference. First operand 447842 states and 708640 transitions. Second operand 8 states. [2020-07-21 12:37:16,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:37:16,555 INFO L93 Difference]: Finished difference Result 1579702 states and 2500794 transitions. [2020-07-21 12:37:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:37:16,556 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 501 [2020-07-21 12:37:16,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:37:18,400 INFO L225 Difference]: With dead ends: 1579702 [2020-07-21 12:37:18,400 INFO L226 Difference]: Without dead ends: 1215581 [2020-07-21 12:37:18,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 12:37:19,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215581 states.