/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:47:55,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:47:55,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:47:55,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:47:55,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:47:55,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:47:55,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:47:55,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:47:55,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:47:55,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:47:55,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:47:55,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:47:55,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:47:55,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:47:55,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:47:55,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:47:55,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:47:55,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:47:55,994 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:47:55,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:47:55,998 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:47:55,999 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:47:56,000 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:47:56,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:47:56,004 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:47:56,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 23:47:56,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 23:47:56,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 23:47:56,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 23:47:56,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 23:47:56,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 23:47:56,011 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 23:47:56,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 23:47:56,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:47:56,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:47:56,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:47:56,014 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 23:47:56,029 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:47:56,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:47:56,031 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:47:56,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:47:56,031 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:47:56,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:47:56,034 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:47:56,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:47:56,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:47:56,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:47:56,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:47:56,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:47:56,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:47:56,036 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:47:56,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:47:56,036 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:47:56,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:47:56,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:47:56,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:47:56,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:47:56,038 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:47:56,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:47:56,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:47:56,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:47:56,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:47:56,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:47:56,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:47:56,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:47:56,040 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:47:56,040 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 -> BIGGEST_EQUIVALENCE_CLASS 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 -> 4 [2020-07-21 23:47:56,334 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:47:56,347 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:47:56,351 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:47:56,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:47:56,353 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:47:56,354 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 23:47:56,414 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b200f1e8/c69f52d596fb421482e475eb0c94c45c/FLAGe7718d172 [2020-07-21 23:47:57,073 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:47:57,075 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 23:47:57,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b200f1e8/c69f52d596fb421482e475eb0c94c45c/FLAGe7718d172 [2020-07-21 23:47:57,251 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b200f1e8/c69f52d596fb421482e475eb0c94c45c [2020-07-21 23:47:57,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:47:57,264 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:47:57,269 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:47:57,270 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:47:57,274 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:47:57,275 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:47:57" (1/1) ... [2020-07-21 23:47:57,278 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5da7f1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:47:57, skipping insertion in model container [2020-07-21 23:47:57,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:47:57" (1/1) ... [2020-07-21 23:47:57,287 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:47:57,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:47:59,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:47:59,153 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:48:00,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:48:00,110 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:48:00,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:00 WrapperNode [2020-07-21 23:48:00,111 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:48:00,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:48:00,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:48:00,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:48:00,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:00" (1/1) ... [2020-07-21 23:48:00,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:00" (1/1) ... [2020-07-21 23:48:00,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:00" (1/1) ... [2020-07-21 23:48:00,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:00" (1/1) ... [2020-07-21 23:48:00,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:00" (1/1) ... [2020-07-21 23:48:00,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:00" (1/1) ... [2020-07-21 23:48:00,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:00" (1/1) ... [2020-07-21 23:48:00,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:48:00,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:48:00,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:48:00,345 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:48:00,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:00" (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 23:48:00,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:48:00,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:48:00,422 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:48:00,422 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:48:00,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:48:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 23:48:00,423 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 23:48:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 23:48:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 23:48:00,424 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:48:00,425 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:48:00,425 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 23:48:00,425 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 23:48:00,425 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 23:48:00,426 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 23:48:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 23:48:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 23:48:00,427 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 23:48:00,428 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 23:48:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 23:48:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:48:00,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:48:00,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:48:04,090 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:48:04,091 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 23:48:04,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:48:04 BoogieIcfgContainer [2020-07-21 23:48:04,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:48:04,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:48:04,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:48:04,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:48:04,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:47:57" (1/3) ... [2020-07-21 23:48:04,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0e8770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:48:04, skipping insertion in model container [2020-07-21 23:48:04,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:48:00" (2/3) ... [2020-07-21 23:48:04,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e0e8770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:48:04, skipping insertion in model container [2020-07-21 23:48:04,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:48:04" (3/3) ... [2020-07-21 23:48:04,124 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-21 23:48:04,136 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:48:04,149 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 23:48:04,164 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 23:48:04,199 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:48:04,199 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:48:04,199 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:48:04,199 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:48:04,199 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:48:04,199 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:48:04,200 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:48:04,200 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:48:04,250 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-07-21 23:48:04,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-21 23:48:04,293 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:04,294 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:04,295 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:04,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:04,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-07-21 23:48:04,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:04,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652082264] [2020-07-21 23:48:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:04,909 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:04,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:04,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 2036 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:48:04,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:05,343 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 23:48:05,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:05,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652082264] [2020-07-21 23:48:05,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:05,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:48:05,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101946301] [2020-07-21 23:48:05,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:48:05,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:05,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:48:05,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:48:05,365 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 4 states. [2020-07-21 23:48:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:05,859 INFO L93 Difference]: Finished difference Result 4087 states and 7395 transitions. [2020-07-21 23:48:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 23:48:05,861 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-21 23:48:05,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:05,901 INFO L225 Difference]: With dead ends: 4087 [2020-07-21 23:48:05,901 INFO L226 Difference]: Without dead ends: 2727 [2020-07-21 23:48:05,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:48:05,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2727 states. [2020-07-21 23:48:06,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2727 to 2687. [2020-07-21 23:48:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2687 states. [2020-07-21 23:48:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2687 states to 2687 states and 4394 transitions. [2020-07-21 23:48:06,133 INFO L78 Accepts]: Start accepts. Automaton has 2687 states and 4394 transitions. Word has length 473 [2020-07-21 23:48:06,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:06,135 INFO L479 AbstractCegarLoop]: Abstraction has 2687 states and 4394 transitions. [2020-07-21 23:48:06,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:48:06,135 INFO L276 IsEmpty]: Start isEmpty. Operand 2687 states and 4394 transitions. [2020-07-21 23:48:06,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 23:48:06,174 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:06,175 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:06,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:06,376 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:06,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:06,377 INFO L82 PathProgramCache]: Analyzing trace with hash -379027308, now seen corresponding path program 1 times [2020-07-21 23:48:06,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:06,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959413022] [2020-07-21 23:48:06,378 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:06,852 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:06,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:06,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 2034 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:06,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:07,183 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 23:48:07,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:07,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959413022] [2020-07-21 23:48:07,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:07,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:07,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071188198] [2020-07-21 23:48:07,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:07,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:07,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:07,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:07,188 INFO L87 Difference]: Start difference. First operand 2687 states and 4394 transitions. Second operand 3 states. [2020-07-21 23:48:07,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:07,499 INFO L93 Difference]: Finished difference Result 7724 states and 12580 transitions. [2020-07-21 23:48:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:07,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-21 23:48:07,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:07,527 INFO L225 Difference]: With dead ends: 7724 [2020-07-21 23:48:07,527 INFO L226 Difference]: Without dead ends: 5249 [2020-07-21 23:48:07,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 473 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 23:48:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5249 states. [2020-07-21 23:48:07,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5249 to 5206. [2020-07-21 23:48:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5206 states. [2020-07-21 23:48:07,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5206 states to 5206 states and 8476 transitions. [2020-07-21 23:48:07,733 INFO L78 Accepts]: Start accepts. Automaton has 5206 states and 8476 transitions. Word has length 475 [2020-07-21 23:48:07,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:07,734 INFO L479 AbstractCegarLoop]: Abstraction has 5206 states and 8476 transitions. [2020-07-21 23:48:07,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:07,734 INFO L276 IsEmpty]: Start isEmpty. Operand 5206 states and 8476 transitions. [2020-07-21 23:48:07,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 23:48:07,757 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:07,757 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:07,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:07,972 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:07,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:07,973 INFO L82 PathProgramCache]: Analyzing trace with hash 2000020871, now seen corresponding path program 1 times [2020-07-21 23:48:07,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:07,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488964467] [2020-07-21 23:48:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:08,346 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:08,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:08,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:08,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:48:08,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:08,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488964467] [2020-07-21 23:48:08,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:08,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:08,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175374206] [2020-07-21 23:48:08,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:08,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:08,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:08,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:08,518 INFO L87 Difference]: Start difference. First operand 5206 states and 8476 transitions. Second operand 3 states. [2020-07-21 23:48:08,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:08,887 INFO L93 Difference]: Finished difference Result 15326 states and 24898 transitions. [2020-07-21 23:48:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:08,888 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-21 23:48:08,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:08,937 INFO L225 Difference]: With dead ends: 15326 [2020-07-21 23:48:08,937 INFO L226 Difference]: Without dead ends: 10202 [2020-07-21 23:48:08,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:08,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10202 states. [2020-07-21 23:48:09,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10202 to 5234. [2020-07-21 23:48:09,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5234 states. [2020-07-21 23:48:09,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 8516 transitions. [2020-07-21 23:48:09,343 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 8516 transitions. Word has length 476 [2020-07-21 23:48:09,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:09,343 INFO L479 AbstractCegarLoop]: Abstraction has 5234 states and 8516 transitions. [2020-07-21 23:48:09,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:09,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 8516 transitions. [2020-07-21 23:48:09,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 23:48:09,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:09,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:09,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:09,572 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:09,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:09,573 INFO L82 PathProgramCache]: Analyzing trace with hash 2134732313, now seen corresponding path program 1 times [2020-07-21 23:48:09,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:09,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332005005] [2020-07-21 23:48:09,574 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:09,930 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:09,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:09,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 1667 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:48:09,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:10,090 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 23:48:10,090 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:10,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332005005] [2020-07-21 23:48:10,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:10,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:48:10,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54759909] [2020-07-21 23:48:10,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:48:10,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:10,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:48:10,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:48:10,094 INFO L87 Difference]: Start difference. First operand 5234 states and 8516 transitions. Second operand 4 states. [2020-07-21 23:48:10,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:10,583 INFO L93 Difference]: Finished difference Result 11573 states and 18955 transitions. [2020-07-21 23:48:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:48:10,584 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-21 23:48:10,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:10,639 INFO L225 Difference]: With dead ends: 11573 [2020-07-21 23:48:10,640 INFO L226 Difference]: Without dead ends: 6354 [2020-07-21 23:48:10,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 474 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 23:48:10,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6354 states. [2020-07-21 23:48:10,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6354 to 5317. [2020-07-21 23:48:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5317 states. [2020-07-21 23:48:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5317 states to 5317 states and 8655 transitions. [2020-07-21 23:48:10,922 INFO L78 Accepts]: Start accepts. Automaton has 5317 states and 8655 transitions. Word has length 477 [2020-07-21 23:48:10,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:10,923 INFO L479 AbstractCegarLoop]: Abstraction has 5317 states and 8655 transitions. [2020-07-21 23:48:10,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:48:10,924 INFO L276 IsEmpty]: Start isEmpty. Operand 5317 states and 8655 transitions. [2020-07-21 23:48:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 23:48:10,939 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:10,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:11,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:11,153 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:11,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:11,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1794497967, now seen corresponding path program 1 times [2020-07-21 23:48:11,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:11,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334938287] [2020-07-21 23:48:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:11,513 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:11,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:11,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:11,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:11,681 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 23:48:11,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:11,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334938287] [2020-07-21 23:48:11,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:11,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:11,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529551345] [2020-07-21 23:48:11,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:11,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:11,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:11,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:11,685 INFO L87 Difference]: Start difference. First operand 5317 states and 8655 transitions. Second operand 3 states. [2020-07-21 23:48:12,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:12,413 INFO L93 Difference]: Finished difference Result 15861 states and 25816 transitions. [2020-07-21 23:48:12,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:12,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 23:48:12,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:12,437 INFO L225 Difference]: With dead ends: 15861 [2020-07-21 23:48:12,444 INFO L226 Difference]: Without dead ends: 10575 [2020-07-21 23:48:12,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 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 23:48:12,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10575 states. [2020-07-21 23:48:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10575 to 5343. [2020-07-21 23:48:12,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5343 states. [2020-07-21 23:48:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5343 states to 5343 states and 8693 transitions. [2020-07-21 23:48:12,731 INFO L78 Accepts]: Start accepts. Automaton has 5343 states and 8693 transitions. Word has length 480 [2020-07-21 23:48:12,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:12,731 INFO L479 AbstractCegarLoop]: Abstraction has 5343 states and 8693 transitions. [2020-07-21 23:48:12,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:12,731 INFO L276 IsEmpty]: Start isEmpty. Operand 5343 states and 8693 transitions. [2020-07-21 23:48:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 23:48:12,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:12,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:12,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:12,961 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:12,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:12,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1766089123, now seen corresponding path program 1 times [2020-07-21 23:48:12,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:12,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260762553] [2020-07-21 23:48:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:13,335 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:13,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:13,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 2041 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:13,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:13,722 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 23:48:13,723 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:13,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260762553] [2020-07-21 23:48:13,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:13,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:13,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817136399] [2020-07-21 23:48:13,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:13,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:13,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:13,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:13,727 INFO L87 Difference]: Start difference. First operand 5343 states and 8693 transitions. Second operand 3 states. [2020-07-21 23:48:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:14,379 INFO L93 Difference]: Finished difference Result 15683 states and 25516 transitions. [2020-07-21 23:48:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:14,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 23:48:14,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:14,405 INFO L225 Difference]: With dead ends: 15683 [2020-07-21 23:48:14,405 INFO L226 Difference]: Without dead ends: 10527 [2020-07-21 23:48:14,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:14,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10527 states. [2020-07-21 23:48:14,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10527 to 10489. [2020-07-21 23:48:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10489 states. [2020-07-21 23:48:14,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10489 states to 10489 states and 17013 transitions. [2020-07-21 23:48:14,874 INFO L78 Accepts]: Start accepts. Automaton has 10489 states and 17013 transitions. Word has length 481 [2020-07-21 23:48:14,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:14,875 INFO L479 AbstractCegarLoop]: Abstraction has 10489 states and 17013 transitions. [2020-07-21 23:48:14,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:14,875 INFO L276 IsEmpty]: Start isEmpty. Operand 10489 states and 17013 transitions. [2020-07-21 23:48:14,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 23:48:14,900 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:14,901 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:15,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:15,115 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash 769559699, now seen corresponding path program 1 times [2020-07-21 23:48:15,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:15,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017829957] [2020-07-21 23:48:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:15,468 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:15,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:15,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:15,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:15,669 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 23:48:15,670 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:15,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017829957] [2020-07-21 23:48:15,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:15,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:15,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237485819] [2020-07-21 23:48:15,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:15,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:15,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:15,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:15,672 INFO L87 Difference]: Start difference. First operand 10489 states and 17013 transitions. Second operand 3 states. [2020-07-21 23:48:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:16,303 INFO L93 Difference]: Finished difference Result 31329 states and 50808 transitions. [2020-07-21 23:48:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:16,304 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 23:48:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:16,359 INFO L225 Difference]: With dead ends: 31329 [2020-07-21 23:48:16,360 INFO L226 Difference]: Without dead ends: 20892 [2020-07-21 23:48:16,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:16,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20892 states. [2020-07-21 23:48:16,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20892 to 10551. [2020-07-21 23:48:16,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10551 states. [2020-07-21 23:48:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10551 states to 10551 states and 17106 transitions. [2020-07-21 23:48:17,004 INFO L78 Accepts]: Start accepts. Automaton has 10551 states and 17106 transitions. Word has length 481 [2020-07-21 23:48:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:17,004 INFO L479 AbstractCegarLoop]: Abstraction has 10551 states and 17106 transitions. [2020-07-21 23:48:17,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 10551 states and 17106 transitions. [2020-07-21 23:48:17,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 23:48:17,026 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:17,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:17,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:17,243 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:17,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:17,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1749651431, now seen corresponding path program 1 times [2020-07-21 23:48:17,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:17,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189568380] [2020-07-21 23:48:17,244 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:17,572 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:17,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:17,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:17,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:17,708 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 23:48:17,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:17,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189568380] [2020-07-21 23:48:17,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:17,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:17,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546882790] [2020-07-21 23:48:17,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:17,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:17,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:17,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:17,711 INFO L87 Difference]: Start difference. First operand 10551 states and 17106 transitions. Second operand 3 states. [2020-07-21 23:48:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:18,372 INFO L93 Difference]: Finished difference Result 31436 states and 50954 transitions. [2020-07-21 23:48:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:18,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 23:48:18,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:18,415 INFO L225 Difference]: With dead ends: 31436 [2020-07-21 23:48:18,415 INFO L226 Difference]: Without dead ends: 20998 [2020-07-21 23:48:18,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 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 23:48:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20998 states. [2020-07-21 23:48:18,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20998 to 10657. [2020-07-21 23:48:18,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10657 states. [2020-07-21 23:48:18,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10657 states to 10657 states and 17245 transitions. [2020-07-21 23:48:18,984 INFO L78 Accepts]: Start accepts. Automaton has 10657 states and 17245 transitions. Word has length 482 [2020-07-21 23:48:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:18,985 INFO L479 AbstractCegarLoop]: Abstraction has 10657 states and 17245 transitions. [2020-07-21 23:48:18,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 10657 states and 17245 transitions. [2020-07-21 23:48:18,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 23:48:18,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:18,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:19,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:19,199 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:19,201 INFO L82 PathProgramCache]: Analyzing trace with hash -719041507, now seen corresponding path program 1 times [2020-07-21 23:48:19,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:19,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515655095] [2020-07-21 23:48:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:19,556 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:19,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:19,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:19,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:19,651 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 23:48:19,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:19,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515655095] [2020-07-21 23:48:19,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:19,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:19,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105871771] [2020-07-21 23:48:19,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:19,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:19,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:19,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:19,653 INFO L87 Difference]: Start difference. First operand 10657 states and 17245 transitions. Second operand 3 states. [2020-07-21 23:48:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:20,467 INFO L93 Difference]: Finished difference Result 31029 states and 50246 transitions. [2020-07-21 23:48:20,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:20,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 23:48:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:20,501 INFO L225 Difference]: With dead ends: 31029 [2020-07-21 23:48:20,501 INFO L226 Difference]: Without dead ends: 20836 [2020-07-21 23:48:20,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:20,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20836 states. [2020-07-21 23:48:21,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20836 to 10809. [2020-07-21 23:48:21,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10809 states. [2020-07-21 23:48:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10809 states to 10809 states and 17469 transitions. [2020-07-21 23:48:21,119 INFO L78 Accepts]: Start accepts. Automaton has 10809 states and 17469 transitions. Word has length 483 [2020-07-21 23:48:21,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:21,120 INFO L479 AbstractCegarLoop]: Abstraction has 10809 states and 17469 transitions. [2020-07-21 23:48:21,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:21,120 INFO L276 IsEmpty]: Start isEmpty. Operand 10809 states and 17469 transitions. [2020-07-21 23:48:21,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-21 23:48:21,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:21,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:21,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:21,342 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:21,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1501080077, now seen corresponding path program 1 times [2020-07-21 23:48:21,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:21,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944398280] [2020-07-21 23:48:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:21,683 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:21,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:21,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:21,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:21,942 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 23:48:21,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:21,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944398280] [2020-07-21 23:48:21,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:21,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:21,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001983289] [2020-07-21 23:48:21,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:21,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:21,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:21,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:21,944 INFO L87 Difference]: Start difference. First operand 10809 states and 17469 transitions. Second operand 3 states. [2020-07-21 23:48:22,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:22,509 INFO L93 Difference]: Finished difference Result 31286 states and 50603 transitions. [2020-07-21 23:48:22,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:22,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-21 23:48:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:22,534 INFO L225 Difference]: With dead ends: 31286 [2020-07-21 23:48:22,534 INFO L226 Difference]: Without dead ends: 21075 [2020-07-21 23:48:22,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 482 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 23:48:22,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21075 states. [2020-07-21 23:48:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21075 to 11048. [2020-07-21 23:48:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11048 states. [2020-07-21 23:48:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11048 states to 11048 states and 17781 transitions. [2020-07-21 23:48:23,091 INFO L78 Accepts]: Start accepts. Automaton has 11048 states and 17781 transitions. Word has length 484 [2020-07-21 23:48:23,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:23,092 INFO L479 AbstractCegarLoop]: Abstraction has 11048 states and 17781 transitions. [2020-07-21 23:48:23,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 11048 states and 17781 transitions. [2020-07-21 23:48:23,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-21 23:48:23,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:23,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:23,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:23,322 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:23,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:23,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2035173401, now seen corresponding path program 1 times [2020-07-21 23:48:23,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:23,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273473388] [2020-07-21 23:48:23,324 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:23,684 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:48:23,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:23,910 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 23:48:23,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:23,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273473388] [2020-07-21 23:48:23,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:23,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:48:23,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341670913] [2020-07-21 23:48:23,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:48:23,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:23,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:48:23,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:48:23,913 INFO L87 Difference]: Start difference. First operand 11048 states and 17781 transitions. Second operand 4 states. [2020-07-21 23:48:24,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:24,572 INFO L93 Difference]: Finished difference Result 25706 states and 41756 transitions. [2020-07-21 23:48:24,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:48:24,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-21 23:48:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:24,589 INFO L225 Difference]: With dead ends: 25706 [2020-07-21 23:48:24,589 INFO L226 Difference]: Without dead ends: 13618 [2020-07-21 23:48:24,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 482 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 23:48:24,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13618 states. [2020-07-21 23:48:25,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13618 to 13580. [2020-07-21 23:48:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13580 states. [2020-07-21 23:48:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13580 states to 13580 states and 21944 transitions. [2020-07-21 23:48:25,185 INFO L78 Accepts]: Start accepts. Automaton has 13580 states and 21944 transitions. Word has length 485 [2020-07-21 23:48:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:25,185 INFO L479 AbstractCegarLoop]: Abstraction has 13580 states and 21944 transitions. [2020-07-21 23:48:25,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:48:25,185 INFO L276 IsEmpty]: Start isEmpty. Operand 13580 states and 21944 transitions. [2020-07-21 23:48:25,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 23:48:25,200 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:25,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:25,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:25,415 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:25,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1215153266, now seen corresponding path program 1 times [2020-07-21 23:48:25,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:25,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946247130] [2020-07-21 23:48:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:25,897 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:25,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:25,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 2047 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:48:25,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:26,199 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 23:48:26,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:26,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946247130] [2020-07-21 23:48:26,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:26,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:48:26,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636824975] [2020-07-21 23:48:26,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:48:26,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:26,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:48:26,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:48:26,202 INFO L87 Difference]: Start difference. First operand 13580 states and 21944 transitions. Second operand 4 states. [2020-07-21 23:48:27,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:27,239 INFO L93 Difference]: Finished difference Result 40021 states and 64712 transitions. [2020-07-21 23:48:27,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:48:27,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-07-21 23:48:27,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:27,267 INFO L225 Difference]: With dead ends: 40021 [2020-07-21 23:48:27,268 INFO L226 Difference]: Without dead ends: 26677 [2020-07-21 23:48:27,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 23:48:27,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26677 states. [2020-07-21 23:48:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26677 to 26560. [2020-07-21 23:48:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26560 states. [2020-07-21 23:48:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26560 states to 26560 states and 42772 transitions. [2020-07-21 23:48:28,926 INFO L78 Accepts]: Start accepts. Automaton has 26560 states and 42772 transitions. Word has length 487 [2020-07-21 23:48:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:28,926 INFO L479 AbstractCegarLoop]: Abstraction has 26560 states and 42772 transitions. [2020-07-21 23:48:28,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:48:28,926 INFO L276 IsEmpty]: Start isEmpty. Operand 26560 states and 42772 transitions. [2020-07-21 23:48:28,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 23:48:28,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:28,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:48:29,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:29,162 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:29,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:29,163 INFO L82 PathProgramCache]: Analyzing trace with hash 368568658, now seen corresponding path program 1 times [2020-07-21 23:48:29,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:29,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810042265] [2020-07-21 23:48:29,164 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:29,511 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:29,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:29,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:48:29,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:29,630 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 23:48:29,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:29,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810042265] [2020-07-21 23:48:29,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:29,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:48:29,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363289104] [2020-07-21 23:48:29,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:48:29,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:29,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:48:29,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:48:29,632 INFO L87 Difference]: Start difference. First operand 26560 states and 42772 transitions. Second operand 4 states. [2020-07-21 23:48:31,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:31,921 INFO L93 Difference]: Finished difference Result 72086 states and 115924 transitions. [2020-07-21 23:48:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:48:31,921 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-07-21 23:48:31,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:31,970 INFO L225 Difference]: With dead ends: 72086 [2020-07-21 23:48:31,971 INFO L226 Difference]: Without dead ends: 50157 [2020-07-21 23:48:31,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 485 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 23:48:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50157 states. [2020-07-21 23:48:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50157 to 30369. [2020-07-21 23:48:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30369 states. [2020-07-21 23:48:33,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30369 states to 30369 states and 49193 transitions. [2020-07-21 23:48:33,473 INFO L78 Accepts]: Start accepts. Automaton has 30369 states and 49193 transitions. Word has length 488 [2020-07-21 23:48:33,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:33,474 INFO L479 AbstractCegarLoop]: Abstraction has 30369 states and 49193 transitions. [2020-07-21 23:48:33,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:48:33,474 INFO L276 IsEmpty]: Start isEmpty. Operand 30369 states and 49193 transitions. [2020-07-21 23:48:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 23:48:33,506 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:33,506 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:33,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:33,721 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:33,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1769495683, now seen corresponding path program 1 times [2020-07-21 23:48:33,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:33,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059301625] [2020-07-21 23:48:33,723 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:34,136 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:34,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:34,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 2050 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:34,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:34,357 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 23:48:34,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:34,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059301625] [2020-07-21 23:48:34,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:34,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:34,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745597587] [2020-07-21 23:48:34,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:34,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:34,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:34,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:34,359 INFO L87 Difference]: Start difference. First operand 30369 states and 49193 transitions. Second operand 3 states. [2020-07-21 23:48:37,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:37,437 INFO L93 Difference]: Finished difference Result 83442 states and 135466 transitions. [2020-07-21 23:48:37,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:37,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-21 23:48:37,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:37,513 INFO L225 Difference]: With dead ends: 83442 [2020-07-21 23:48:37,513 INFO L226 Difference]: Without dead ends: 58118 [2020-07-21 23:48:37,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58118 states. [2020-07-21 23:48:40,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58118 to 58078. [2020-07-21 23:48:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58078 states. [2020-07-21 23:48:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58078 states to 58078 states and 93943 transitions. [2020-07-21 23:48:40,078 INFO L78 Accepts]: Start accepts. Automaton has 58078 states and 93943 transitions. Word has length 489 [2020-07-21 23:48:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:40,079 INFO L479 AbstractCegarLoop]: Abstraction has 58078 states and 93943 transitions. [2020-07-21 23:48:40,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:48:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 58078 states and 93943 transitions. [2020-07-21 23:48:40,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 23:48:40,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:40,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:40,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:40,325 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:40,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1053028354, now seen corresponding path program 1 times [2020-07-21 23:48:40,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:40,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432828965] [2020-07-21 23:48:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:40,681 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:48:40,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:40,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:48:40,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:41,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 23:48:41,098 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:41,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432828965] [2020-07-21 23:48:41,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:41,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:48:41,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275802229] [2020-07-21 23:48:41,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:48:41,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:41,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:48:41,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:48:41,101 INFO L87 Difference]: Start difference. First operand 58078 states and 93943 transitions. Second operand 4 states. [2020-07-21 23:48:46,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:46,000 INFO L93 Difference]: Finished difference Result 139234 states and 227718 transitions. [2020-07-21 23:48:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:48:46,001 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-07-21 23:48:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:46,070 INFO L225 Difference]: With dead ends: 139234 [2020-07-21 23:48:46,070 INFO L226 Difference]: Without dead ends: 71702 [2020-07-21 23:48:46,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 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 23:48:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71702 states. [2020-07-21 23:48:49,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71702 to 71196. [2020-07-21 23:48:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71196 states. [2020-07-21 23:48:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71196 states to 71196 states and 116057 transitions. [2020-07-21 23:48:49,204 INFO L78 Accepts]: Start accepts. Automaton has 71196 states and 116057 transitions. Word has length 491 [2020-07-21 23:48:49,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:48:49,205 INFO L479 AbstractCegarLoop]: Abstraction has 71196 states and 116057 transitions. [2020-07-21 23:48:49,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:48:49,205 INFO L276 IsEmpty]: Start isEmpty. Operand 71196 states and 116057 transitions. [2020-07-21 23:48:49,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-21 23:48:49,261 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:48:49,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:48:49,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:48:49,463 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:48:49,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:48:49,464 INFO L82 PathProgramCache]: Analyzing trace with hash -854579077, now seen corresponding path program 1 times [2020-07-21 23:48:49,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:48:49,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139651819] [2020-07-21 23:48:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:48:49,862 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:48:49,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:48:49,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 2048 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:48:49,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:48:50,057 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 23:48:50,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:48:50,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139651819] [2020-07-21 23:48:50,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:48:50,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:48:50,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341553666] [2020-07-21 23:48:50,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:48:50,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:48:50,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:48:50,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:50,060 INFO L87 Difference]: Start difference. First operand 71196 states and 116057 transitions. Second operand 3 states. [2020-07-21 23:48:57,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:48:57,338 INFO L93 Difference]: Finished difference Result 192564 states and 312890 transitions. [2020-07-21 23:48:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:48:57,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-21 23:48:57,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:48:57,472 INFO L225 Difference]: With dead ends: 192564 [2020-07-21 23:48:57,472 INFO L226 Difference]: Without dead ends: 133847 [2020-07-21 23:48:57,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:48:57,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133847 states. [2020-07-21 23:49:05,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133847 to 133448. [2020-07-21 23:49:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133448 states. [2020-07-21 23:49:05,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133448 states to 133448 states and 216408 transitions. [2020-07-21 23:49:05,941 INFO L78 Accepts]: Start accepts. Automaton has 133448 states and 216408 transitions. Word has length 492 [2020-07-21 23:49:05,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:05,942 INFO L479 AbstractCegarLoop]: Abstraction has 133448 states and 216408 transitions. [2020-07-21 23:49:05,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:49:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand 133448 states and 216408 transitions. [2020-07-21 23:49:06,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-21 23:49:06,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:06,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:49:06,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:06,248 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:06,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:06,249 INFO L82 PathProgramCache]: Analyzing trace with hash 437217195, now seen corresponding path program 1 times [2020-07-21 23:49:06,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:06,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160904740] [2020-07-21 23:49:06,250 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:49:06,608 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:49:06,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:06,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1674 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:06,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:06,701 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 23:49:06,701 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:06,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160904740] [2020-07-21 23:49:06,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:06,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:06,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786146772] [2020-07-21 23:49:06,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:06,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:06,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:06,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:06,703 INFO L87 Difference]: Start difference. First operand 133448 states and 216408 transitions. Second operand 3 states. [2020-07-21 23:49:15,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:15,063 INFO L93 Difference]: Finished difference Result 254240 states and 410649 transitions. [2020-07-21 23:49:15,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:49:15,064 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2020-07-21 23:49:15,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:15,256 INFO L225 Difference]: With dead ends: 254240 [2020-07-21 23:49:15,257 INFO L226 Difference]: Without dead ends: 187322 [2020-07-21 23:49:15,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 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 23:49:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187322 states. [2020-07-21 23:49:24,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187322 to 130926. [2020-07-21 23:49:24,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130926 states. [2020-07-21 23:49:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130926 states to 130926 states and 212299 transitions. [2020-07-21 23:49:25,108 INFO L78 Accepts]: Start accepts. Automaton has 130926 states and 212299 transitions. Word has length 493 [2020-07-21 23:49:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:25,108 INFO L479 AbstractCegarLoop]: Abstraction has 130926 states and 212299 transitions. [2020-07-21 23:49:25,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:49:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 130926 states and 212299 transitions. [2020-07-21 23:49:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2020-07-21 23:49:25,224 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:25,224 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:49:25,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:25,425 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:25,426 INFO L82 PathProgramCache]: Analyzing trace with hash -2025033674, now seen corresponding path program 1 times [2020-07-21 23:49:25,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:25,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060510747] [2020-07-21 23:49:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:49:25,777 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:49:25,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:25,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 23:49:25,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:25,883 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 23:49:25,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:25,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060510747] [2020-07-21 23:49:25,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:25,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:49:25,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048097019] [2020-07-21 23:49:25,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:49:25,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:25,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:49:25,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:49:25,886 INFO L87 Difference]: Start difference. First operand 130926 states and 212299 transitions. Second operand 4 states. [2020-07-21 23:49:35,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:49:35,859 INFO L93 Difference]: Finished difference Result 316221 states and 516056 transitions. [2020-07-21 23:49:35,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:49:35,859 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 494 [2020-07-21 23:49:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:49:36,032 INFO L225 Difference]: With dead ends: 316221 [2020-07-21 23:49:36,032 INFO L226 Difference]: Without dead ends: 172666 [2020-07-21 23:49:36,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 491 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 23:49:36,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172666 states. [2020-07-21 23:49:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172666 to 172267. [2020-07-21 23:49:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172267 states. [2020-07-21 23:49:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172267 states to 172267 states and 280505 transitions. [2020-07-21 23:49:48,162 INFO L78 Accepts]: Start accepts. Automaton has 172267 states and 280505 transitions. Word has length 494 [2020-07-21 23:49:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:49:48,162 INFO L479 AbstractCegarLoop]: Abstraction has 172267 states and 280505 transitions. [2020-07-21 23:49:48,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:49:48,163 INFO L276 IsEmpty]: Start isEmpty. Operand 172267 states and 280505 transitions. [2020-07-21 23:49:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 23:49:48,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:49:48,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:49:48,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:49:48,504 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:49:48,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:49:48,505 INFO L82 PathProgramCache]: Analyzing trace with hash 277638833, now seen corresponding path program 1 times [2020-07-21 23:49:48,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:49:48,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916882546] [2020-07-21 23:49:48,506 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:49:48,859 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:49:48,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:49:48,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:49:48,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:49:48,978 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 23:49:48,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:49:48,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916882546] [2020-07-21 23:49:48,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:49:48,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:49:48,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489543290] [2020-07-21 23:49:48,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:49:48,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:49:48,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:49:48,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:49:48,980 INFO L87 Difference]: Start difference. First operand 172267 states and 280505 transitions. Second operand 3 states. [2020-07-21 23:50:08,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:08,450 INFO L93 Difference]: Finished difference Result 493204 states and 802681 transitions. [2020-07-21 23:50:08,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:50:08,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 23:50:08,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:08,782 INFO L225 Difference]: With dead ends: 493204 [2020-07-21 23:50:08,782 INFO L226 Difference]: Without dead ends: 323358 [2020-07-21 23:50:08,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 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 23:50:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323358 states. [2020-07-21 23:50:23,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323358 to 170774. [2020-07-21 23:50:23,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170774 states. [2020-07-21 23:50:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170774 states to 170774 states and 277781 transitions. [2020-07-21 23:50:23,813 INFO L78 Accepts]: Start accepts. Automaton has 170774 states and 277781 transitions. Word has length 495 [2020-07-21 23:50:23,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:23,813 INFO L479 AbstractCegarLoop]: Abstraction has 170774 states and 277781 transitions. [2020-07-21 23:50:23,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:50:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 170774 states and 277781 transitions. [2020-07-21 23:50:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 23:50:23,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:23,947 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:24,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:24,148 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:24,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:24,149 INFO L82 PathProgramCache]: Analyzing trace with hash -70443877, now seen corresponding path program 1 times [2020-07-21 23:50:24,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:24,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863376946] [2020-07-21 23:50:24,150 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:50:24,496 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:50:24,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:24,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:50:24,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:24,590 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 23:50:24,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:24,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863376946] [2020-07-21 23:50:24,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:24,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:50:24,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637580044] [2020-07-21 23:50:24,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:50:24,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:24,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:50:24,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:50:24,591 INFO L87 Difference]: Start difference. First operand 170774 states and 277781 transitions. Second operand 3 states. [2020-07-21 23:50:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:50:41,689 INFO L93 Difference]: Finished difference Result 483546 states and 784822 transitions. [2020-07-21 23:50:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:50:41,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 23:50:41,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:50:42,036 INFO L225 Difference]: With dead ends: 483546 [2020-07-21 23:50:42,037 INFO L226 Difference]: Without dead ends: 314139 [2020-07-21 23:50:42,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 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 23:50:42,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314139 states. [2020-07-21 23:50:57,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314139 to 170692. [2020-07-21 23:50:57,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170692 states. [2020-07-21 23:50:58,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170692 states to 170692 states and 277635 transitions. [2020-07-21 23:50:58,101 INFO L78 Accepts]: Start accepts. Automaton has 170692 states and 277635 transitions. Word has length 495 [2020-07-21 23:50:58,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:50:58,101 INFO L479 AbstractCegarLoop]: Abstraction has 170692 states and 277635 transitions. [2020-07-21 23:50:58,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:50:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 170692 states and 277635 transitions. [2020-07-21 23:50:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 23:50:58,589 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:50:58,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:50:58,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:50:58,790 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:50:58,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:50:58,791 INFO L82 PathProgramCache]: Analyzing trace with hash 580706254, now seen corresponding path program 1 times [2020-07-21 23:50:58,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:50:58,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652290464] [2020-07-21 23:50:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 23:50:59,144 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:50:59,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:50:59,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:50:59,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:50:59,245 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 23:50:59,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:50:59,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652290464] [2020-07-21 23:50:59,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:50:59,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:50:59,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276518239] [2020-07-21 23:50:59,247 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:50:59,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:50:59,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:50:59,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:50:59,247 INFO L87 Difference]: Start difference. First operand 170692 states and 277635 transitions. Second operand 3 states. [2020-07-21 23:51:16,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:16,728 INFO L93 Difference]: Finished difference Result 443632 states and 716045 transitions. [2020-07-21 23:51:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:16,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-21 23:51:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:17,055 INFO L225 Difference]: With dead ends: 443632 [2020-07-21 23:51:17,056 INFO L226 Difference]: Without dead ends: 306643 [2020-07-21 23:51:17,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 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 23:51:17,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306643 states. [2020-07-21 23:51:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306643 to 176182. [2020-07-21 23:51:32,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176182 states. [2020-07-21 23:51:32,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176182 states to 176182 states and 285757 transitions. [2020-07-21 23:51:32,427 INFO L78 Accepts]: Start accepts. Automaton has 176182 states and 285757 transitions. Word has length 495 [2020-07-21 23:51:32,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:51:32,428 INFO L479 AbstractCegarLoop]: Abstraction has 176182 states and 285757 transitions. [2020-07-21 23:51:32,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:51:32,428 INFO L276 IsEmpty]: Start isEmpty. Operand 176182 states and 285757 transitions. [2020-07-21 23:51:32,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 23:51:32,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:51:32,583 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:51:32,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:32,783 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:51:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:51:32,784 INFO L82 PathProgramCache]: Analyzing trace with hash -89157083, now seen corresponding path program 1 times [2020-07-21 23:51:32,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:51:32,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291984493] [2020-07-21 23:51:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:51:33,171 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:51:33,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:51:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2052 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:51:33,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:51:33,819 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 23:51:33,819 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:51:33,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291984493] [2020-07-21 23:51:33,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:51:33,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:51:33,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827994645] [2020-07-21 23:51:33,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:51:33,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:51:33,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:51:33,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:33,821 INFO L87 Difference]: Start difference. First operand 176182 states and 285757 transitions. Second operand 3 states. [2020-07-21 23:51:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:51:58,222 INFO L93 Difference]: Finished difference Result 474619 states and 767209 transitions. [2020-07-21 23:51:58,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:51:58,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 23:51:58,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:51:58,608 INFO L225 Difference]: With dead ends: 474619 [2020-07-21 23:51:58,608 INFO L226 Difference]: Without dead ends: 336658 [2020-07-21 23:51:58,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:51:58,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336658 states. [2020-07-21 23:52:23,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336658 to 336607. [2020-07-21 23:52:23,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336607 states. [2020-07-21 23:52:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336607 states to 336607 states and 543701 transitions. [2020-07-21 23:52:24,216 INFO L78 Accepts]: Start accepts. Automaton has 336607 states and 543701 transitions. Word has length 496 [2020-07-21 23:52:24,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:52:24,216 INFO L479 AbstractCegarLoop]: Abstraction has 336607 states and 543701 transitions. [2020-07-21 23:52:24,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:52:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 336607 states and 543701 transitions. [2020-07-21 23:52:24,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-21 23:52:24,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:52:24,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:52:24,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:24,736 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:52:24,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:52:24,737 INFO L82 PathProgramCache]: Analyzing trace with hash -253808264, now seen corresponding path program 1 times [2020-07-21 23:52:24,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:52:24,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353322866] [2020-07-21 23:52:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:52:25,650 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:52:25,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:52:25,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:52:25,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:52:25,834 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 23:52:25,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:52:25,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353322866] [2020-07-21 23:52:25,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:52:25,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:52:25,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103753378] [2020-07-21 23:52:25,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:52:25,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:52:25,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:52:25,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:52:25,837 INFO L87 Difference]: Start difference. First operand 336607 states and 543701 transitions. Second operand 3 states. [2020-07-21 23:53:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:53:08,341 INFO L93 Difference]: Finished difference Result 876281 states and 1404253 transitions. [2020-07-21 23:53:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:53:08,341 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-21 23:53:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:53:09,079 INFO L225 Difference]: With dead ends: 876281 [2020-07-21 23:53:09,079 INFO L226 Difference]: Without dead ends: 602372 [2020-07-21 23:53:09,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:09,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602372 states. [2020-07-21 23:53:40,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602372 to 351403. [2020-07-21 23:53:40,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351403 states. [2020-07-21 23:53:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351403 states to 351403 states and 564793 transitions. [2020-07-21 23:53:42,050 INFO L78 Accepts]: Start accepts. Automaton has 351403 states and 564793 transitions. Word has length 496 [2020-07-21 23:53:42,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:53:42,050 INFO L479 AbstractCegarLoop]: Abstraction has 351403 states and 564793 transitions. [2020-07-21 23:53:42,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:53:42,051 INFO L276 IsEmpty]: Start isEmpty. Operand 351403 states and 564793 transitions. [2020-07-21 23:53:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 23:53:42,406 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:53:42,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:53:42,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:42,608 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:53:42,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:53:42,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1486454398, now seen corresponding path program 1 times [2020-07-21 23:53:42,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:53:42,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103076637] [2020-07-21 23:53:42,610 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:53:42,960 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:53:42,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:53:42,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:53:42,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:53:43,053 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 23:53:43,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:53:43,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103076637] [2020-07-21 23:53:43,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:53:43,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:53:43,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748738530] [2020-07-21 23:53:43,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:53:43,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:53:43,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:53:43,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:53:43,055 INFO L87 Difference]: Start difference. First operand 351403 states and 564793 transitions. Second operand 3 states. [2020-07-21 23:54:29,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:54:29,344 INFO L93 Difference]: Finished difference Result 917375 states and 1464371 transitions. [2020-07-21 23:54:29,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:54:29,344 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 497 [2020-07-21 23:54:29,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:54:30,155 INFO L225 Difference]: With dead ends: 917375 [2020-07-21 23:54:30,155 INFO L226 Difference]: Without dead ends: 638592 [2020-07-21 23:54:30,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:54:30,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638592 states. [2020-07-21 23:55:06,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638592 to 380451. [2020-07-21 23:55:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 380451 states. [2020-07-21 23:55:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380451 states to 380451 states and 603045 transitions. [2020-07-21 23:55:07,527 INFO L78 Accepts]: Start accepts. Automaton has 380451 states and 603045 transitions. Word has length 497 [2020-07-21 23:55:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:55:07,528 INFO L479 AbstractCegarLoop]: Abstraction has 380451 states and 603045 transitions. [2020-07-21 23:55:07,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:55:07,528 INFO L276 IsEmpty]: Start isEmpty. Operand 380451 states and 603045 transitions. [2020-07-21 23:55:08,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 23:55:08,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:55:08,902 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:55:09,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:09,103 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:55:09,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:55:09,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1877354371, now seen corresponding path program 1 times [2020-07-21 23:55:09,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:55:09,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552960819] [2020-07-21 23:55:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:55:09,440 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:55:09,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:55:09,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 1672 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 23:55:09,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:55:09,539 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 23:55:09,539 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:55:09,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552960819] [2020-07-21 23:55:09,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:55:09,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 23:55:09,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116094501] [2020-07-21 23:55:09,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 23:55:09,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:55:09,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 23:55:09,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:55:09,541 INFO L87 Difference]: Start difference. First operand 380451 states and 603045 transitions. Second operand 3 states. [2020-07-21 23:56:02,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:56:02,774 INFO L93 Difference]: Finished difference Result 1013887 states and 1607909 transitions. [2020-07-21 23:56:02,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 23:56:02,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-21 23:56:02,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:56:03,728 INFO L225 Difference]: With dead ends: 1013887 [2020-07-21 23:56:03,728 INFO L226 Difference]: Without dead ends: 717820 [2020-07-21 23:56:03,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 23:56:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717820 states. [2020-07-21 23:57:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717820 to 717806. [2020-07-21 23:57:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717806 states. [2020-07-21 23:57:16,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717806 states to 717806 states and 1134819 transitions. [2020-07-21 23:57:16,218 INFO L78 Accepts]: Start accepts. Automaton has 717806 states and 1134819 transitions. Word has length 498 [2020-07-21 23:57:16,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:57:16,219 INFO L479 AbstractCegarLoop]: Abstraction has 717806 states and 1134819 transitions. [2020-07-21 23:57:16,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 23:57:16,219 INFO L276 IsEmpty]: Start isEmpty. Operand 717806 states and 1134819 transitions. [2020-07-21 23:57:16,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-21 23:57:16,961 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:57:16,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 23:57:17,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:17,162 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:57:17,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:57:17,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1780725120, now seen corresponding path program 1 times [2020-07-21 23:57:17,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:57:17,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707130072] [2020-07-21 23:57:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:57:17,509 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 23:57:17,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:57:17,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 23:57:17,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:57:18,772 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 23:57:18,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:57:18,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707130072] [2020-07-21 23:57:18,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:57:18,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:57:18,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391944531] [2020-07-21 23:57:18,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:57:18,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:57:18,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:57:18,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:57:18,775 INFO L87 Difference]: Start difference. First operand 717806 states and 1134819 transitions. Second operand 4 states. [2020-07-21 23:59:03,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:59:03,051 INFO L93 Difference]: Finished difference Result 1883900 states and 2974305 transitions. [2020-07-21 23:59:03,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:59:03,052 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2020-07-21 23:59:03,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:59:05,080 INFO L225 Difference]: With dead ends: 1883900 [2020-07-21 23:59:05,080 INFO L226 Difference]: Without dead ends: 1299807 [2020-07-21 23:59:05,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 495 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 23:59:07,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1299807 states.