/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 21:05:18,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 21:05:18,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 21:05:18,939 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 21:05:18,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 21:05:18,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 21:05:18,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 21:05:18,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 21:05:18,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 21:05:18,961 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 21:05:18,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 21:05:18,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 21:05:18,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 21:05:18,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 21:05:18,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 21:05:18,972 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 21:05:18,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 21:05:18,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 21:05:18,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 21:05:18,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 21:05:18,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 21:05:18,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 21:05:18,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 21:05:18,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 21:05:18,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 21:05:18,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 21:05:18,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 21:05:18,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 21:05:18,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 21:05:19,001 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 21:05:19,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 21:05:19,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 21:05:19,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 21:05:19,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 21:05:19,004 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 21:05:19,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 21:05:19,005 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 21:05:19,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 21:05:19,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 21:05:19,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 21:05:19,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 21:05:19,009 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 21:05:19,044 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 21:05:19,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 21:05:19,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 21:05:19,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 21:05:19,046 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 21:05:19,046 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 21:05:19,047 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 21:05:19,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 21:05:19,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 21:05:19,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 21:05:19,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 21:05:19,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 21:05:19,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 21:05:19,051 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 21:05:19,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 21:05:19,051 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 21:05:19,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 21:05:19,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 21:05:19,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 21:05:19,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 21:05:19,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 21:05:19,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 21:05:19,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 21:05:19,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 21:05:19,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 21:05:19,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 21:05:19,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:19,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 21:05:19,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 21:05:19,055 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 -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 21:05:19,337 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 21:05:19,351 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 21:05:19,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 21:05:19,356 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 21:05:19,357 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 21:05:19,357 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:05:19,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04c135d61/4ababea81fc84fe09282c2ab009d5dcd/FLAG25b74a3b9 [2020-07-21 21:05:20,152 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 21:05:20,152 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:05:20,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04c135d61/4ababea81fc84fe09282c2ab009d5dcd/FLAG25b74a3b9 [2020-07-21 21:05:20,283 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04c135d61/4ababea81fc84fe09282c2ab009d5dcd [2020-07-21 21:05:20,292 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 21:05:20,295 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 21:05:20,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 21:05:20,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 21:05:20,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 21:05:20,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:05:20" (1/1) ... [2020-07-21 21:05:20,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683bfa51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:20, skipping insertion in model container [2020-07-21 21:05:20,305 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 09:05:20" (1/1) ... [2020-07-21 21:05:20,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 21:05:20,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 21:05:21,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:05:21,486 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 21:05:21,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 21:05:21,987 INFO L208 MainTranslator]: Completed translation [2020-07-21 21:05:21,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:21 WrapperNode [2020-07-21 21:05:21,988 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 21:05:21,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 21:05:21,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 21:05:21,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 21:05:22,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:21" (1/1) ... [2020-07-21 21:05:22,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:21" (1/1) ... [2020-07-21 21:05:22,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:21" (1/1) ... [2020-07-21 21:05:22,083 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:21" (1/1) ... [2020-07-21 21:05:22,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:21" (1/1) ... [2020-07-21 21:05:22,221 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:21" (1/1) ... [2020-07-21 21:05:22,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:21" (1/1) ... [2020-07-21 21:05:22,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 21:05:22,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 21:05:22,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 21:05:22,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 21:05:22,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:21" (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 21:05:22,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 21:05:22,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 21:05:22,340 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 21:05:22,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 21:05:22,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 21:05:22,340 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 21:05:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 21:05:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 21:05:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 21:05:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 21:05:22,342 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 21:05:22,342 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 21:05:22,342 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 21:05:22,342 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 21:05:22,343 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 21:05:22,343 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 21:05:22,343 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 21:05:22,343 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 21:05:22,343 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 21:05:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 21:05:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 21:05:22,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 21:05:25,109 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 21:05:25,109 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 21:05:25,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:05:25 BoogieIcfgContainer [2020-07-21 21:05:25,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 21:05:25,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 21:05:25,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 21:05:25,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 21:05:25,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 09:05:20" (1/3) ... [2020-07-21 21:05:25,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7293c03f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:05:25, skipping insertion in model container [2020-07-21 21:05:25,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 09:05:21" (2/3) ... [2020-07-21 21:05:25,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7293c03f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 09:05:25, skipping insertion in model container [2020-07-21 21:05:25,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 09:05:25" (3/3) ... [2020-07-21 21:05:25,129 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 21:05:25,140 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 21:05:25,151 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 21:05:25,167 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 21:05:25,202 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 21:05:25,202 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 21:05:25,202 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 21:05:25,202 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 21:05:25,203 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 21:05:25,203 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 21:05:25,203 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 21:05:25,203 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 21:05:25,246 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-07-21 21:05:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:05:25,287 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:25,289 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] [2020-07-21 21:05:25,289 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:25,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:25,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-07-21 21:05:25,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:25,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457167307] [2020-07-21 21:05:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:25,903 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:25,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:25,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:05:25,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:26,180 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 21:05:26,180 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:26,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457167307] [2020-07-21 21:05:26,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:26,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:26,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520949837] [2020-07-21 21:05:26,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:26,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:26,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:26,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:26,209 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 3 states. [2020-07-21 21:05:26,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:26,469 INFO L93 Difference]: Finished difference Result 1527 states and 2683 transitions. [2020-07-21 21:05:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:26,471 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 21:05:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:26,497 INFO L225 Difference]: With dead ends: 1527 [2020-07-21 21:05:26,497 INFO L226 Difference]: Without dead ends: 1311 [2020-07-21 21:05:26,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 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 21:05:26,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2020-07-21 21:05:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309. [2020-07-21 21:05:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1309 states. [2020-07-21 21:05:26,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions. [2020-07-21 21:05:26,634 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330 [2020-07-21 21:05:26,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:26,636 INFO L479 AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions. [2020-07-21 21:05:26,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions. [2020-07-21 21:05:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:05:26,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:26,648 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] [2020-07-21 21:05:26,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:26,860 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times [2020-07-21 21:05:26,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:26,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786393370] [2020-07-21 21:05:26,863 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:27,350 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:27,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:27,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:05:27,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:27,499 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 21:05:27,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:27,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786393370] [2020-07-21 21:05:27,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:27,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:27,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957149555] [2020-07-21 21:05:27,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:27,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:27,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:27,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:27,505 INFO L87 Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 3 states. [2020-07-21 21:05:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:27,724 INFO L93 Difference]: Finished difference Result 2683 states and 4213 transitions. [2020-07-21 21:05:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:27,725 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 21:05:27,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:27,739 INFO L225 Difference]: With dead ends: 2683 [2020-07-21 21:05:27,740 INFO L226 Difference]: Without dead ends: 2301 [2020-07-21 21:05:27,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 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 21:05:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2020-07-21 21:05:27,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299. [2020-07-21 21:05:27,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2299 states. [2020-07-21 21:05:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions. [2020-07-21 21:05:27,869 INFO L78 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330 [2020-07-21 21:05:27,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:27,871 INFO L479 AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions. [2020-07-21 21:05:27,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:27,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions. [2020-07-21 21:05:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:05:27,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:27,880 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] [2020-07-21 21:05:28,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:28,095 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:28,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:28,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times [2020-07-21 21:05:28,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:28,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145849888] [2020-07-21 21:05:28,098 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:28,468 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:28,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:28,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 2054 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 21:05:28,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:28,653 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 21:05:28,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:28,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145849888] [2020-07-21 21:05:28,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:28,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:28,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032910815] [2020-07-21 21:05:28,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:28,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:28,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:28,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:28,659 INFO L87 Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 3 states. [2020-07-21 21:05:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:28,968 INFO L93 Difference]: Finished difference Result 4867 states and 7634 transitions. [2020-07-21 21:05:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:28,969 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 330 [2020-07-21 21:05:28,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:28,993 INFO L225 Difference]: With dead ends: 4867 [2020-07-21 21:05:28,993 INFO L226 Difference]: Without dead ends: 4201 [2020-07-21 21:05:28,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 328 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 21:05:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2020-07-21 21:05:29,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199. [2020-07-21 21:05:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4199 states. [2020-07-21 21:05:29,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions. [2020-07-21 21:05:29,157 INFO L78 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330 [2020-07-21 21:05:29,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:29,158 INFO L479 AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions. [2020-07-21 21:05:29,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions. [2020-07-21 21:05:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 21:05:29,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:29,170 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] [2020-07-21 21:05:29,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:29,384 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times [2020-07-21 21:05:29,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:29,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903329900] [2020-07-21 21:05:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:29,754 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:29,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:29,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 2055 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:05:29,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:29,997 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 21:05:29,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:29,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903329900] [2020-07-21 21:05:29,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:29,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:29,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938396825] [2020-07-21 21:05:30,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:30,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:30,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:30,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:30,001 INFO L87 Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 4 states. [2020-07-21 21:05:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:30,403 INFO L93 Difference]: Finished difference Result 12414 states and 19245 transitions. [2020-07-21 21:05:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:05:30,404 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 21:05:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:30,443 INFO L225 Difference]: With dead ends: 12414 [2020-07-21 21:05:30,444 INFO L226 Difference]: Without dead ends: 8230 [2020-07-21 21:05:30,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 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 21:05:30,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8230 states. [2020-07-21 21:05:30,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228. [2020-07-21 21:05:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8228 states. [2020-07-21 21:05:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions. [2020-07-21 21:05:30,822 INFO L78 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330 [2020-07-21 21:05:30,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:30,823 INFO L479 AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions. [2020-07-21 21:05:30,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:30,823 INFO L276 IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions. [2020-07-21 21:05:30,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 21:05:30,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:30,840 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] [2020-07-21 21:05:31,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:31,053 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:31,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:31,054 INFO L82 PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times [2020-07-21 21:05:31,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:31,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016446710] [2020-07-21 21:05:31,055 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:31,478 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:31,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:31,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 2058 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:31,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:31,615 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 21:05:31,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:31,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016446710] [2020-07-21 21:05:31,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:31,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:31,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121802580] [2020-07-21 21:05:31,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:31,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:31,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:31,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:31,619 INFO L87 Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 3 states. [2020-07-21 21:05:32,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:32,137 INFO L93 Difference]: Finished difference Result 24233 states and 37318 transitions. [2020-07-21 21:05:32,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:32,137 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 21:05:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:32,201 INFO L225 Difference]: With dead ends: 24233 [2020-07-21 21:05:32,202 INFO L226 Difference]: Without dead ends: 16134 [2020-07-21 21:05:32,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 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 21:05:32,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16134 states. [2020-07-21 21:05:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132. [2020-07-21 21:05:32,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16132 states. [2020-07-21 21:05:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions. [2020-07-21 21:05:32,803 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332 [2020-07-21 21:05:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:32,804 INFO L479 AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions. [2020-07-21 21:05:32,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:32,804 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions. [2020-07-21 21:05:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 21:05:32,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:32,837 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] [2020-07-21 21:05:33,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:33,052 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:33,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:33,052 INFO L82 PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times [2020-07-21 21:05:33,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:33,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764647789] [2020-07-21 21:05:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:33,419 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:33,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:33,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:33,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:33,487 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 21:05:33,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:33,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764647789] [2020-07-21 21:05:33,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:33,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:33,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695322741] [2020-07-21 21:05:33,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:33,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:33,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:33,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:33,490 INFO L87 Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 3 states. [2020-07-21 21:05:34,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:34,311 INFO L93 Difference]: Finished difference Result 48319 states and 74093 transitions. [2020-07-21 21:05:34,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:34,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 21:05:34,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:34,374 INFO L225 Difference]: With dead ends: 48319 [2020-07-21 21:05:34,375 INFO L226 Difference]: Without dead ends: 32226 [2020-07-21 21:05:34,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 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 21:05:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32226 states. [2020-07-21 21:05:35,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32226 to 16146. [2020-07-21 21:05:35,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16146 states. [2020-07-21 21:05:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16146 states to 16146 states and 24758 transitions. [2020-07-21 21:05:35,095 INFO L78 Accepts]: Start accepts. Automaton has 16146 states and 24758 transitions. Word has length 332 [2020-07-21 21:05:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:35,096 INFO L479 AbstractCegarLoop]: Abstraction has 16146 states and 24758 transitions. [2020-07-21 21:05:35,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 16146 states and 24758 transitions. [2020-07-21 21:05:35,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 21:05:35,124 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:35,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:05:35,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:35,340 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:35,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:35,341 INFO L82 PathProgramCache]: Analyzing trace with hash -2080345228, now seen corresponding path program 1 times [2020-07-21 21:05:35,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:35,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933716183] [2020-07-21 21:05:35,342 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:35,569 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:35,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:35,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:35,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:35,757 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 21:05:35,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:35,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933716183] [2020-07-21 21:05:35,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:35,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:35,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925552702] [2020-07-21 21:05:35,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:35,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:35,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:35,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:35,760 INFO L87 Difference]: Start difference. First operand 16146 states and 24758 transitions. Second operand 3 states. [2020-07-21 21:05:36,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:36,364 INFO L93 Difference]: Finished difference Result 48341 states and 74123 transitions. [2020-07-21 21:05:36,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:36,364 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 21:05:36,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:36,436 INFO L225 Difference]: With dead ends: 48341 [2020-07-21 21:05:36,437 INFO L226 Difference]: Without dead ends: 32249 [2020-07-21 21:05:36,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 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 21:05:36,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32249 states. [2020-07-21 21:05:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32249 to 16169. [2020-07-21 21:05:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16169 states. [2020-07-21 21:05:37,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16169 states to 16169 states and 24790 transitions. [2020-07-21 21:05:37,848 INFO L78 Accepts]: Start accepts. Automaton has 16169 states and 24790 transitions. Word has length 333 [2020-07-21 21:05:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:37,849 INFO L479 AbstractCegarLoop]: Abstraction has 16169 states and 24790 transitions. [2020-07-21 21:05:37,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:37,849 INFO L276 IsEmpty]: Start isEmpty. Operand 16169 states and 24790 transitions. [2020-07-21 21:05:37,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 21:05:37,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:37,889 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] [2020-07-21 21:05:38,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:38,102 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:38,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:38,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1155788840, now seen corresponding path program 1 times [2020-07-21 21:05:38,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:38,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380241083] [2020-07-21 21:05:38,103 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:38,363 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:38,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:38,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:05:38,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:38,438 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 21:05:38,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:38,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380241083] [2020-07-21 21:05:38,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:38,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:38,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199428844] [2020-07-21 21:05:38,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:38,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:38,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:38,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:38,441 INFO L87 Difference]: Start difference. First operand 16169 states and 24790 transitions. Second operand 4 states. [2020-07-21 21:05:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:39,033 INFO L93 Difference]: Finished difference Result 32999 states and 50580 transitions. [2020-07-21 21:05:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:05:39,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 21:05:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:39,064 INFO L225 Difference]: With dead ends: 32999 [2020-07-21 21:05:39,064 INFO L226 Difference]: Without dead ends: 16622 [2020-07-21 21:05:39,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 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 21:05:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16622 states. [2020-07-21 21:05:39,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16622 to 16620. [2020-07-21 21:05:39,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16620 states. [2020-07-21 21:05:39,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16620 states to 16620 states and 25376 transitions. [2020-07-21 21:05:39,572 INFO L78 Accepts]: Start accepts. Automaton has 16620 states and 25376 transitions. Word has length 334 [2020-07-21 21:05:39,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:39,572 INFO L479 AbstractCegarLoop]: Abstraction has 16620 states and 25376 transitions. [2020-07-21 21:05:39,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:39,572 INFO L276 IsEmpty]: Start isEmpty. Operand 16620 states and 25376 transitions. [2020-07-21 21:05:39,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 21:05:39,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:39,593 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] [2020-07-21 21:05:39,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:39,795 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:39,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:39,796 INFO L82 PathProgramCache]: Analyzing trace with hash -77921605, now seen corresponding path program 1 times [2020-07-21 21:05:39,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:39,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749370145] [2020-07-21 21:05:39,797 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:40,038 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:40,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:40,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:40,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:40,113 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 21:05:40,113 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:40,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749370145] [2020-07-21 21:05:40,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:40,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:40,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624057574] [2020-07-21 21:05:40,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:40,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:40,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:40,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:40,116 INFO L87 Difference]: Start difference. First operand 16620 states and 25376 transitions. Second operand 3 states. [2020-07-21 21:05:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:40,893 INFO L93 Difference]: Finished difference Result 49280 states and 75149 transitions. [2020-07-21 21:05:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:40,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 21:05:40,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:40,961 INFO L225 Difference]: With dead ends: 49280 [2020-07-21 21:05:40,961 INFO L226 Difference]: Without dead ends: 32959 [2020-07-21 21:05:40,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 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 21:05:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32959 states. [2020-07-21 21:05:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32959 to 16650. [2020-07-21 21:05:41,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16650 states. [2020-07-21 21:05:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16650 states to 16650 states and 25411 transitions. [2020-07-21 21:05:41,763 INFO L78 Accepts]: Start accepts. Automaton has 16650 states and 25411 transitions. Word has length 336 [2020-07-21 21:05:41,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:41,764 INFO L479 AbstractCegarLoop]: Abstraction has 16650 states and 25411 transitions. [2020-07-21 21:05:41,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 16650 states and 25411 transitions. [2020-07-21 21:05:41,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 21:05:41,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:41,778 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] [2020-07-21 21:05:41,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:41,984 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:41,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:41,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1365097813, now seen corresponding path program 1 times [2020-07-21 21:05:41,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:41,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504779730] [2020-07-21 21:05:41,988 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:42,337 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:42,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:42,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 2065 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:42,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:42,443 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 21:05:42,443 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:42,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504779730] [2020-07-21 21:05:42,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:42,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:42,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692947810] [2020-07-21 21:05:42,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:42,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:42,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:42,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:42,445 INFO L87 Difference]: Start difference. First operand 16650 states and 25411 transitions. Second operand 3 states. [2020-07-21 21:05:43,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:43,183 INFO L93 Difference]: Finished difference Result 47036 states and 71632 transitions. [2020-07-21 21:05:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:05:43,183 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 21:05:43,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:43,241 INFO L225 Difference]: With dead ends: 47036 [2020-07-21 21:05:43,241 INFO L226 Difference]: Without dead ends: 30813 [2020-07-21 21:05:43,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 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 21:05:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30813 states. [2020-07-21 21:05:44,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30813 to 30811. [2020-07-21 21:05:44,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30811 states. [2020-07-21 21:05:44,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30811 states to 30811 states and 46706 transitions. [2020-07-21 21:05:44,881 INFO L78 Accepts]: Start accepts. Automaton has 30811 states and 46706 transitions. Word has length 336 [2020-07-21 21:05:44,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:44,882 INFO L479 AbstractCegarLoop]: Abstraction has 30811 states and 46706 transitions. [2020-07-21 21:05:44,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:05:44,882 INFO L276 IsEmpty]: Start isEmpty. Operand 30811 states and 46706 transitions. [2020-07-21 21:05:44,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 21:05:44,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:44,902 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] [2020-07-21 21:05:45,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:45,108 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:45,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:45,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1525087342, now seen corresponding path program 1 times [2020-07-21 21:05:45,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:45,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025481081] [2020-07-21 21:05:45,110 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:45,358 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:05:45,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:45,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:05:45,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:45,420 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 21:05:45,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:45,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025481081] [2020-07-21 21:05:45,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:45,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:05:45,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504679194] [2020-07-21 21:05:45,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:05:45,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:45,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:05:45,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:05:45,422 INFO L87 Difference]: Start difference. First operand 30811 states and 46706 transitions. Second operand 4 states. [2020-07-21 21:05:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:46,993 INFO L93 Difference]: Finished difference Result 88878 states and 134506 transitions. [2020-07-21 21:05:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:05:46,994 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-21 21:05:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:47,089 INFO L225 Difference]: With dead ends: 88878 [2020-07-21 21:05:47,089 INFO L226 Difference]: Without dead ends: 58888 [2020-07-21 21:05:47,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 333 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 21:05:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58888 states. [2020-07-21 21:05:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58888 to 31083. [2020-07-21 21:05:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31083 states. [2020-07-21 21:05:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31083 states to 31083 states and 47136 transitions. [2020-07-21 21:05:48,538 INFO L78 Accepts]: Start accepts. Automaton has 31083 states and 47136 transitions. Word has length 336 [2020-07-21 21:05:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:48,538 INFO L479 AbstractCegarLoop]: Abstraction has 31083 states and 47136 transitions. [2020-07-21 21:05:48,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:05:48,538 INFO L276 IsEmpty]: Start isEmpty. Operand 31083 states and 47136 transitions. [2020-07-21 21:05:48,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 21:05:48,565 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:48,565 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] [2020-07-21 21:05:48,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:48,775 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:48,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:48,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1523242626, now seen corresponding path program 1 times [2020-07-21 21:05:48,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:48,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427527840] [2020-07-21 21:05:48,777 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:49,130 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:49,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:49,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 21:05:49,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:49,423 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 21:05:49,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:49,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427527840] [2020-07-21 21:05:49,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:49,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 21:05:49,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948654727] [2020-07-21 21:05:49,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 21:05:49,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:49,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 21:05:49,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 21:05:49,427 INFO L87 Difference]: Start difference. First operand 31083 states and 47136 transitions. Second operand 8 states. [2020-07-21 21:05:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:05:54,789 INFO L93 Difference]: Finished difference Result 89203 states and 136890 transitions. [2020-07-21 21:05:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 21:05:54,790 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 336 [2020-07-21 21:05:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:05:54,859 INFO L225 Difference]: With dead ends: 89203 [2020-07-21 21:05:54,859 INFO L226 Difference]: Without dead ends: 60863 [2020-07-21 21:05:54,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 329 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 21:05:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60863 states. [2020-07-21 21:05:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60863 to 43757. [2020-07-21 21:05:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43757 states. [2020-07-21 21:05:56,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43757 states to 43757 states and 65800 transitions. [2020-07-21 21:05:56,962 INFO L78 Accepts]: Start accepts. Automaton has 43757 states and 65800 transitions. Word has length 336 [2020-07-21 21:05:56,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:05:56,965 INFO L479 AbstractCegarLoop]: Abstraction has 43757 states and 65800 transitions. [2020-07-21 21:05:56,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 21:05:56,966 INFO L276 IsEmpty]: Start isEmpty. Operand 43757 states and 65800 transitions. [2020-07-21 21:05:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 21:05:57,004 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:05:57,004 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] [2020-07-21 21:05:57,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:05:57,219 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:05:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:05:57,220 INFO L82 PathProgramCache]: Analyzing trace with hash 487374232, now seen corresponding path program 1 times [2020-07-21 21:05:57,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:05:57,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359742701] [2020-07-21 21:05:57,221 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:05:57,561 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:05:57,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:05:57,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 2070 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:05:57,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:05:57,647 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 21:05:57,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:05:57,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359742701] [2020-07-21 21:05:57,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:05:57,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:05:57,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837724165] [2020-07-21 21:05:57,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:05:57,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:05:57,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:05:57,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:05:57,656 INFO L87 Difference]: Start difference. First operand 43757 states and 65800 transitions. Second operand 3 states. [2020-07-21 21:06:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:00,991 INFO L93 Difference]: Finished difference Result 101875 states and 153578 transitions. [2020-07-21 21:06:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:00,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 21:06:00,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:01,054 INFO L225 Difference]: With dead ends: 101875 [2020-07-21 21:06:01,055 INFO L226 Difference]: Without dead ends: 60705 [2020-07-21 21:06:01,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 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 21:06:01,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60705 states. [2020-07-21 21:06:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60705 to 50523. [2020-07-21 21:06:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50523 states. [2020-07-21 21:06:03,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50523 states to 50523 states and 76452 transitions. [2020-07-21 21:06:03,393 INFO L78 Accepts]: Start accepts. Automaton has 50523 states and 76452 transitions. Word has length 336 [2020-07-21 21:06:03,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:03,394 INFO L479 AbstractCegarLoop]: Abstraction has 50523 states and 76452 transitions. [2020-07-21 21:06:03,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:03,394 INFO L276 IsEmpty]: Start isEmpty. Operand 50523 states and 76452 transitions. [2020-07-21 21:06:03,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 21:06:03,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:03,418 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:06:03,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:03,619 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:03,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:03,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1011511093, now seen corresponding path program 1 times [2020-07-21 21:06:03,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:03,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93303972] [2020-07-21 21:06:03,621 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:06:03,957 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:06:03,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:03,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 2073 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:06:03,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:04,028 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 21:06:04,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:04,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93303972] [2020-07-21 21:06:04,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:04,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:04,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358143549] [2020-07-21 21:06:04,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:04,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:04,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:04,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:04,030 INFO L87 Difference]: Start difference. First operand 50523 states and 76452 transitions. Second operand 3 states. [2020-07-21 21:06:07,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:07,607 INFO L93 Difference]: Finished difference Result 128549 states and 195526 transitions. [2020-07-21 21:06:07,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:07,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 21:06:07,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:07,712 INFO L225 Difference]: With dead ends: 128549 [2020-07-21 21:06:07,713 INFO L226 Difference]: Without dead ends: 81045 [2020-07-21 21:06:07,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:07,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81045 states. [2020-07-21 21:06:12,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81045 to 69347. [2020-07-21 21:06:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69347 states. [2020-07-21 21:06:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69347 states to 69347 states and 106174 transitions. [2020-07-21 21:06:12,669 INFO L78 Accepts]: Start accepts. Automaton has 69347 states and 106174 transitions. Word has length 338 [2020-07-21 21:06:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:12,669 INFO L479 AbstractCegarLoop]: Abstraction has 69347 states and 106174 transitions. [2020-07-21 21:06:12,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 69347 states and 106174 transitions. [2020-07-21 21:06:12,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 21:06:12,694 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:12,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 21:06:12,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:12,895 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:12,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:12,896 INFO L82 PathProgramCache]: Analyzing trace with hash -923817742, now seen corresponding path program 1 times [2020-07-21 21:06:12,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:12,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979589401] [2020-07-21 21:06:12,897 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:06:13,128 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:13,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:13,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:06:13,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:13,205 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 21:06:13,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:13,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979589401] [2020-07-21 21:06:13,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:13,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:13,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766994422] [2020-07-21 21:06:13,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:13,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:13,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:13,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:13,207 INFO L87 Difference]: Start difference. First operand 69347 states and 106174 transitions. Second operand 3 states. [2020-07-21 21:06:21,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:21,044 INFO L93 Difference]: Finished difference Result 205823 states and 314822 transitions. [2020-07-21 21:06:21,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:21,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 21:06:21,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:21,236 INFO L225 Difference]: With dead ends: 205823 [2020-07-21 21:06:21,236 INFO L226 Difference]: Without dead ends: 137595 [2020-07-21 21:06:21,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:21,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137595 states. [2020-07-21 21:06:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137595 to 69473. [2020-07-21 21:06:25,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69473 states. [2020-07-21 21:06:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69473 states to 69473 states and 106338 transitions. [2020-07-21 21:06:25,188 INFO L78 Accepts]: Start accepts. Automaton has 69473 states and 106338 transitions. Word has length 338 [2020-07-21 21:06:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:25,189 INFO L479 AbstractCegarLoop]: Abstraction has 69473 states and 106338 transitions. [2020-07-21 21:06:25,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:25,189 INFO L276 IsEmpty]: Start isEmpty. Operand 69473 states and 106338 transitions. [2020-07-21 21:06:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 21:06:25,223 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:25,223 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] [2020-07-21 21:06:25,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:25,424 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:25,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1900936775, now seen corresponding path program 1 times [2020-07-21 21:06:25,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:25,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421266824] [2020-07-21 21:06:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:06:25,671 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:06:25,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:25,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:06:25,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:26,066 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 21:06:26,066 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:26,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421266824] [2020-07-21 21:06:26,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:26,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:06:26,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180163765] [2020-07-21 21:06:26,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:06:26,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:26,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:06:26,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:06:26,073 INFO L87 Difference]: Start difference. First operand 69473 states and 106338 transitions. Second operand 3 states. [2020-07-21 21:06:33,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:33,720 INFO L93 Difference]: Finished difference Result 205847 states and 314806 transitions. [2020-07-21 21:06:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:06:33,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 21:06:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:33,877 INFO L225 Difference]: With dead ends: 205847 [2020-07-21 21:06:33,877 INFO L226 Difference]: Without dead ends: 137589 [2020-07-21 21:06:33,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 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 21:06:34,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137589 states. [2020-07-21 21:06:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137589 to 69615. [2020-07-21 21:06:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69615 states. [2020-07-21 21:06:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69615 states to 69615 states and 106507 transitions. [2020-07-21 21:06:38,127 INFO L78 Accepts]: Start accepts. Automaton has 69615 states and 106507 transitions. Word has length 339 [2020-07-21 21:06:38,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:38,127 INFO L479 AbstractCegarLoop]: Abstraction has 69615 states and 106507 transitions. [2020-07-21 21:06:38,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:06:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 69615 states and 106507 transitions. [2020-07-21 21:06:38,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 21:06:38,153 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:38,154 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] [2020-07-21 21:06:38,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:38,366 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:38,367 INFO L82 PathProgramCache]: Analyzing trace with hash 130285857, now seen corresponding path program 1 times [2020-07-21 21:06:38,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:38,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918150703] [2020-07-21 21:06:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:06:39,106 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:06:39,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:39,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 2078 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:06:39,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:39,315 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 21:06:39,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:39,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918150703] [2020-07-21 21:06:39,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:39,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 21:06:39,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204617290] [2020-07-21 21:06:39,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 21:06:39,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:39,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 21:06:39,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 21:06:39,318 INFO L87 Difference]: Start difference. First operand 69615 states and 106507 transitions. Second operand 5 states. [2020-07-21 21:06:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:06:48,595 INFO L93 Difference]: Finished difference Result 174932 states and 270734 transitions. [2020-07-21 21:06:48,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 21:06:48,595 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-07-21 21:06:48,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:06:48,757 INFO L225 Difference]: With dead ends: 174932 [2020-07-21 21:06:48,757 INFO L226 Difference]: Without dead ends: 133450 [2020-07-21 21:06:48,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 21:06:48,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133450 states. [2020-07-21 21:06:56,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133450 to 133448. [2020-07-21 21:06:56,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133448 states. [2020-07-21 21:06:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133448 states to 133448 states and 204259 transitions. [2020-07-21 21:06:56,478 INFO L78 Accepts]: Start accepts. Automaton has 133448 states and 204259 transitions. Word has length 339 [2020-07-21 21:06:56,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:06:56,478 INFO L479 AbstractCegarLoop]: Abstraction has 133448 states and 204259 transitions. [2020-07-21 21:06:56,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 21:06:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 133448 states and 204259 transitions. [2020-07-21 21:06:56,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 21:06:56,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:06:56,535 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] [2020-07-21 21:06:56,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:06:56,736 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:06:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:06:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash 450094822, now seen corresponding path program 1 times [2020-07-21 21:06:56,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:06:56,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854596647] [2020-07-21 21:06:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:06:57,090 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:06:57,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:06:57,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 2079 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 21:06:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:06:57,680 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 21:06:57,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:06:57,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854596647] [2020-07-21 21:06:57,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:06:57,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:06:57,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418098922] [2020-07-21 21:06:57,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:06:57,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:06:57,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:06:57,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:06:57,683 INFO L87 Difference]: Start difference. First operand 133448 states and 204259 transitions. Second operand 4 states. [2020-07-21 21:07:13,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:07:13,783 INFO L93 Difference]: Finished difference Result 393684 states and 602407 transitions. [2020-07-21 21:07:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:07:13,783 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 21:07:13,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:07:14,148 INFO L225 Difference]: With dead ends: 393684 [2020-07-21 21:07:14,149 INFO L226 Difference]: Without dead ends: 260574 [2020-07-21 21:07:14,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 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 21:07:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260574 states. [2020-07-21 21:07:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260574 to 260572. [2020-07-21 21:07:34,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260572 states. [2020-07-21 21:07:35,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260572 states to 260572 states and 397136 transitions. [2020-07-21 21:07:35,025 INFO L78 Accepts]: Start accepts. Automaton has 260572 states and 397136 transitions. Word has length 339 [2020-07-21 21:07:35,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:07:35,026 INFO L479 AbstractCegarLoop]: Abstraction has 260572 states and 397136 transitions. [2020-07-21 21:07:35,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:07:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 260572 states and 397136 transitions. [2020-07-21 21:07:35,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 21:07:35,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:07:35,122 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] [2020-07-21 21:07:35,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:07:35,323 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:07:35,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:07:35,324 INFO L82 PathProgramCache]: Analyzing trace with hash -340731515, now seen corresponding path program 1 times [2020-07-21 21:07:35,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:07:35,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944886391] [2020-07-21 21:07:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:07:35,566 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:07:35,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:07:35,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1117 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 21:07:35,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:07:35,642 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 21:07:35,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:07:35,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944886391] [2020-07-21 21:07:35,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:07:35,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 21:07:35,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498909009] [2020-07-21 21:07:35,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 21:07:35,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:07:35,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 21:07:35,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 21:07:35,644 INFO L87 Difference]: Start difference. First operand 260572 states and 397136 transitions. Second operand 4 states. [2020-07-21 21:07:54,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:07:54,348 INFO L93 Difference]: Finished difference Result 506332 states and 771454 transitions. [2020-07-21 21:07:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 21:07:54,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-21 21:07:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:07:54,699 INFO L225 Difference]: With dead ends: 506332 [2020-07-21 21:07:54,699 INFO L226 Difference]: Without dead ends: 247684 [2020-07-21 21:07:54,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 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 21:07:55,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247684 states. [2020-07-21 21:08:15,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247684 to 247538. [2020-07-21 21:08:15,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247538 states. [2020-07-21 21:08:15,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247538 states to 247538 states and 377168 transitions. [2020-07-21 21:08:15,988 INFO L78 Accepts]: Start accepts. Automaton has 247538 states and 377168 transitions. Word has length 340 [2020-07-21 21:08:15,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:08:15,989 INFO L479 AbstractCegarLoop]: Abstraction has 247538 states and 377168 transitions. [2020-07-21 21:08:15,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 21:08:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 247538 states and 377168 transitions. [2020-07-21 21:08:16,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 21:08:16,085 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:08:16,085 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] [2020-07-21 21:08:16,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:08:16,286 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:08:16,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:08:16,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1166336954, now seen corresponding path program 1 times [2020-07-21 21:08:16,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:08:16,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362249232] [2020-07-21 21:08:16,288 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:08:16,648 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 21:08:16,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:08:16,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 21:08:16,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:08:16,760 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 21:08:16,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:08:16,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362249232] [2020-07-21 21:08:16,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:08:16,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 21:08:16,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913420837] [2020-07-21 21:08:16,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 21:08:16,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:08:16,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 21:08:16,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 21:08:16,762 INFO L87 Difference]: Start difference. First operand 247538 states and 377168 transitions. Second operand 3 states. [2020-07-21 21:08:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:08:49,963 INFO L93 Difference]: Finished difference Result 729868 states and 1112501 transitions. [2020-07-21 21:08:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 21:08:49,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 21:08:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:08:50,757 INFO L225 Difference]: With dead ends: 729868 [2020-07-21 21:08:50,758 INFO L226 Difference]: Without dead ends: 483881 [2020-07-21 21:08:51,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 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 21:08:51,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483881 states. [2020-07-21 21:09:35,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483881 to 483879. [2020-07-21 21:09:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483879 states. [2020-07-21 21:09:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483879 states to 483879 states and 734850 transitions. [2020-07-21 21:09:37,178 INFO L78 Accepts]: Start accepts. Automaton has 483879 states and 734850 transitions. Word has length 341 [2020-07-21 21:09:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 21:09:37,178 INFO L479 AbstractCegarLoop]: Abstraction has 483879 states and 734850 transitions. [2020-07-21 21:09:37,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 21:09:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 483879 states and 734850 transitions. [2020-07-21 21:09:37,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 21:09:37,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 21:09:37,340 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] [2020-07-21 21:09:37,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 21:09:37,541 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 21:09:37,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 21:09:37,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1261798698, now seen corresponding path program 1 times [2020-07-21 21:09:37,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 21:09:37,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284758322] [2020-07-21 21:09:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) 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 21:09:37,782 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 21:09:37,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 21:09:37,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 21:09:37,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 21:09:37,898 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 21:09:37,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 21:09:37,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284758322] [2020-07-21 21:09:37,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 21:09:37,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-21 21:09:37,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169718394] [2020-07-21 21:09:37,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 21:09:37,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 21:09:37,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 21:09:37,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-21 21:09:37,900 INFO L87 Difference]: Start difference. First operand 483879 states and 734850 transitions. Second operand 9 states. [2020-07-21 21:12:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 21:12:20,222 INFO L93 Difference]: Finished difference Result 2047097 states and 3157717 transitions. [2020-07-21 21:12:20,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 21:12:20,222 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 342 [2020-07-21 21:12:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 21:12:24,429 INFO L225 Difference]: With dead ends: 2047097 [2020-07-21 21:12:24,429 INFO L226 Difference]: Without dead ends: 1852535 [2020-07-21 21:12:24,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2020-07-21 21:12:26,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852535 states.