/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 NUM_VARIABLES --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 [2020-07-20 18:24:26,130 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:24:26,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:24:26,145 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:24:26,146 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:24:26,147 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:24:26,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:24:26,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:24:26,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:24:26,152 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:24:26,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:24:26,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:24:26,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:24:26,156 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:24:26,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:24:26,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:24:26,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:24:26,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:24:26,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:24:26,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:24:26,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:24:26,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:24:26,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:24:26,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:24:26,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 18:24:26,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 18:24:26,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 18:24:26,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 18:24:26,175 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 18:24:26,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 18:24:26,178 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 18:24:26,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 18:24:26,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 18:24:26,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 18:24:26,181 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 18:24:26,181 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 18:24:26,182 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 18:24:26,182 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 18:24:26,182 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:24:26,183 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:24:26,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:24:26,185 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 18:24:26,199 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:24:26,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:24:26,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:24:26,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:24:26,201 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:24:26,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:24:26,202 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:24:26,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:24:26,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:24:26,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:24:26,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:24:26,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:24:26,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:24:26,203 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:24:26,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:24:26,203 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:24:26,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:24:26,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:24:26,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:24:26,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:24:26,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:24:26,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:24:26,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:24:26,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:24:26,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:24:26,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:24:26,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:26,206 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:24:26,206 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:24:26,206 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 -> NUM_VARIABLES 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 [2020-07-20 18:24:26,492 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:24:26,506 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:24:26,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:24:26,511 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:24:26,512 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:24:26,512 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 18:24:26,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44cd96a80/00b5a84301954941894ce72ca27a1770/FLAGc3cc35a26 [2020-07-20 18:24:27,219 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:24:27,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 18:24:27,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44cd96a80/00b5a84301954941894ce72ca27a1770/FLAGc3cc35a26 [2020-07-20 18:24:27,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44cd96a80/00b5a84301954941894ce72ca27a1770 [2020-07-20 18:24:27,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:24:27,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:24:27,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:24:27,356 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:24:27,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:24:27,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:24:27" (1/1) ... [2020-07-20 18:24:27,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d2f883d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:27, skipping insertion in model container [2020-07-20 18:24:27,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:24:27" (1/1) ... [2020-07-20 18:24:27,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:24:27,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:24:29,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:24:29,193 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:24:30,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:24:30,387 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:24:30,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:30 WrapperNode [2020-07-20 18:24:30,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:24:30,389 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:24:30,389 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:24:30,389 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:24:30,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:30" (1/1) ... [2020-07-20 18:24:30,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:30" (1/1) ... [2020-07-20 18:24:30,479 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:30" (1/1) ... [2020-07-20 18:24:30,479 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:30" (1/1) ... [2020-07-20 18:24:30,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:30" (1/1) ... [2020-07-20 18:24:30,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:30" (1/1) ... [2020-07-20 18:24:30,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:30" (1/1) ... [2020-07-20 18:24:30,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:24:30,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:24:30,621 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:24:30,621 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:24:30,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:24:30,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:24:30,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:24:30,714 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:24:30,714 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:24:30,714 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:24:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 18:24:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 18:24:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 18:24:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 18:24:30,715 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:24:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:24:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 18:24:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 18:24:30,716 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 18:24:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 18:24:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 18:24:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 18:24:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 18:24:30,717 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 18:24:30,718 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 18:24:30,718 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:24:30,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:24:30,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:24:35,132 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:24:35,133 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 18:24:35,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:24:35 BoogieIcfgContainer [2020-07-20 18:24:35,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:24:35,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:24:35,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:24:35,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:24:35,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:24:27" (1/3) ... [2020-07-20 18:24:35,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f836718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:24:35, skipping insertion in model container [2020-07-20 18:24:35,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:24:30" (2/3) ... [2020-07-20 18:24:35,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f836718 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:24:35, skipping insertion in model container [2020-07-20 18:24:35,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:24:35" (3/3) ... [2020-07-20 18:24:35,163 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-07-20 18:24:35,175 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:24:35,188 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-20 18:24:35,205 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-20 18:24:35,242 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:24:35,243 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:24:35,243 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:24:35,243 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:24:35,243 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:24:35,243 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:24:35,243 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:24:35,244 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:24:35,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states. [2020-07-20 18:24:35,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-07-20 18:24:35,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:35,347 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] [2020-07-20 18:24:35,348 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:35,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:35,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1447603851, now seen corresponding path program 1 times [2020-07-20 18:24:35,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:35,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614067166] [2020-07-20 18:24:35,367 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 [2020-07-20 18:24:36,162 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:36,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:36,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 2710 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:24:36,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:36,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:36,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:36,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614067166] [2020-07-20 18:24:36,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:36,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:24:36,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278243486] [2020-07-20 18:24:36,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:24:36,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:36,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:24:36,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:24:36,786 INFO L87 Difference]: Start difference. First operand 1393 states. Second operand 4 states. [2020-07-20 18:24:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:37,204 INFO L93 Difference]: Finished difference Result 4116 states and 7449 transitions. [2020-07-20 18:24:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:24:37,206 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 473 [2020-07-20 18:24:37,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:37,240 INFO L225 Difference]: With dead ends: 4116 [2020-07-20 18:24:37,240 INFO L226 Difference]: Without dead ends: 2736 [2020-07-20 18:24:37,250 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 [2020-07-20 18:24:37,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2020-07-20 18:24:37,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2716. [2020-07-20 18:24:37,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2716 states. [2020-07-20 18:24:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2716 states to 2716 states and 4445 transitions. [2020-07-20 18:24:37,472 INFO L78 Accepts]: Start accepts. Automaton has 2716 states and 4445 transitions. Word has length 473 [2020-07-20 18:24:37,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:37,476 INFO L479 AbstractCegarLoop]: Abstraction has 2716 states and 4445 transitions. [2020-07-20 18:24:37,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:24:37,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2716 states and 4445 transitions. [2020-07-20 18:24:37,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 18:24:37,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:37,493 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] [2020-07-20 18:24:37,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:37,709 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:37,710 INFO L82 PathProgramCache]: Analyzing trace with hash 827242404, now seen corresponding path program 1 times [2020-07-20 18:24:37,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:37,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581693671] [2020-07-20 18:24:37,711 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 [2020-07-20 18:24:38,243 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:38,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:38,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 2709 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:38,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:38,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:38,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581693671] [2020-07-20 18:24:38,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:38,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:38,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232144828] [2020-07-20 18:24:38,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:38,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:38,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:38,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:38,518 INFO L87 Difference]: Start difference. First operand 2716 states and 4445 transitions. Second operand 3 states. [2020-07-20 18:24:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:38,809 INFO L93 Difference]: Finished difference Result 7845 states and 12798 transitions. [2020-07-20 18:24:38,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:38,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 475 [2020-07-20 18:24:38,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:38,838 INFO L225 Difference]: With dead ends: 7845 [2020-07-20 18:24:38,838 INFO L226 Difference]: Without dead ends: 5306 [2020-07-20 18:24:38,845 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 [2020-07-20 18:24:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5306 states. [2020-07-20 18:24:39,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5306 to 5288. [2020-07-20 18:24:39,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5288 states. [2020-07-20 18:24:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 8621 transitions. [2020-07-20 18:24:39,055 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 8621 transitions. Word has length 475 [2020-07-20 18:24:39,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:39,056 INFO L479 AbstractCegarLoop]: Abstraction has 5288 states and 8621 transitions. [2020-07-20 18:24:39,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 8621 transitions. [2020-07-20 18:24:39,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 18:24:39,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:39,074 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] [2020-07-20 18:24:39,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:39,288 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:39,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1198999881, now seen corresponding path program 1 times [2020-07-20 18:24:39,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:39,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473973571] [2020-07-20 18:24:39,289 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 [2020-07-20 18:24:39,799 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:39,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:39,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 2512 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:39,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:39,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:39,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473973571] [2020-07-20 18:24:39,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:39,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:39,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620647333] [2020-07-20 18:24:39,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:39,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:39,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:39,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:39,917 INFO L87 Difference]: Start difference. First operand 5288 states and 8621 transitions. Second operand 3 states. [2020-07-20 18:24:40,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:40,278 INFO L93 Difference]: Finished difference Result 15723 states and 25612 transitions. [2020-07-20 18:24:40,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:40,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 476 [2020-07-20 18:24:40,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:40,333 INFO L225 Difference]: With dead ends: 15723 [2020-07-20 18:24:40,334 INFO L226 Difference]: Without dead ends: 10459 [2020-07-20 18:24:40,348 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 [2020-07-20 18:24:40,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10459 states. [2020-07-20 18:24:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10459 to 5310. [2020-07-20 18:24:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5310 states. [2020-07-20 18:24:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5310 states to 5310 states and 8656 transitions. [2020-07-20 18:24:40,835 INFO L78 Accepts]: Start accepts. Automaton has 5310 states and 8656 transitions. Word has length 476 [2020-07-20 18:24:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:40,836 INFO L479 AbstractCegarLoop]: Abstraction has 5310 states and 8656 transitions. [2020-07-20 18:24:40,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:40,836 INFO L276 IsEmpty]: Start isEmpty. Operand 5310 states and 8656 transitions. [2020-07-20 18:24:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-20 18:24:40,858 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:40,858 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] [2020-07-20 18:24:41,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:41,073 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:41,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:41,074 INFO L82 PathProgramCache]: Analyzing trace with hash -640474903, now seen corresponding path program 1 times [2020-07-20 18:24:41,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:41,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273835644] [2020-07-20 18:24:41,075 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 [2020-07-20 18:24:41,559 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:41,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:41,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 2515 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:24:41,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:41,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:41,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273835644] [2020-07-20 18:24:41,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:41,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:24:41,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63806252] [2020-07-20 18:24:41,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:24:41,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:41,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:24:41,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:24:41,724 INFO L87 Difference]: Start difference. First operand 5310 states and 8656 transitions. Second operand 4 states. [2020-07-20 18:24:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:42,218 INFO L93 Difference]: Finished difference Result 12621 states and 20759 transitions. [2020-07-20 18:24:42,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:24:42,219 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 477 [2020-07-20 18:24:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:42,252 INFO L225 Difference]: With dead ends: 12621 [2020-07-20 18:24:42,252 INFO L226 Difference]: Without dead ends: 6367 [2020-07-20 18:24:42,265 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 [2020-07-20 18:24:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6367 states. [2020-07-20 18:24:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6367 to 6349. [2020-07-20 18:24:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6349 states. [2020-07-20 18:24:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6349 states to 6349 states and 10416 transitions. [2020-07-20 18:24:42,510 INFO L78 Accepts]: Start accepts. Automaton has 6349 states and 10416 transitions. Word has length 477 [2020-07-20 18:24:42,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:42,511 INFO L479 AbstractCegarLoop]: Abstraction has 6349 states and 10416 transitions. [2020-07-20 18:24:42,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:24:42,511 INFO L276 IsEmpty]: Start isEmpty. Operand 6349 states and 10416 transitions. [2020-07-20 18:24:42,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-20 18:24:42,531 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:42,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:42,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:42,747 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:42,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:42,748 INFO L82 PathProgramCache]: Analyzing trace with hash -46091998, now seen corresponding path program 1 times [2020-07-20 18:24:42,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:42,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230263917] [2020-07-20 18:24:42,749 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 [2020-07-20 18:24:43,270 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:43,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:43,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 2714 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:43,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:44,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:44,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:44,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230263917] [2020-07-20 18:24:44,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:44,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:44,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333113054] [2020-07-20 18:24:44,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:44,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:44,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:44,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:44,049 INFO L87 Difference]: Start difference. First operand 6349 states and 10416 transitions. Second operand 3 states. [2020-07-20 18:24:44,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:44,524 INFO L93 Difference]: Finished difference Result 18485 states and 30259 transitions. [2020-07-20 18:24:44,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:44,525 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-20 18:24:44,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:44,556 INFO L225 Difference]: With dead ends: 18485 [2020-07-20 18:24:44,557 INFO L226 Difference]: Without dead ends: 12588 [2020-07-20 18:24:44,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:44,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12588 states. [2020-07-20 18:24:45,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12588 to 12445. [2020-07-20 18:24:45,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12445 states. [2020-07-20 18:24:45,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12445 states to 12445 states and 20341 transitions. [2020-07-20 18:24:45,078 INFO L78 Accepts]: Start accepts. Automaton has 12445 states and 20341 transitions. Word has length 478 [2020-07-20 18:24:45,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:45,079 INFO L479 AbstractCegarLoop]: Abstraction has 12445 states and 20341 transitions. [2020-07-20 18:24:45,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 12445 states and 20341 transitions. [2020-07-20 18:24:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2020-07-20 18:24:45,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:45,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:24:45,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:45,322 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:45,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:45,322 INFO L82 PathProgramCache]: Analyzing trace with hash 219759698, now seen corresponding path program 1 times [2020-07-20 18:24:45,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:45,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482732885] [2020-07-20 18:24:45,323 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 [2020-07-20 18:24:45,869 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:45,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:45,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 2515 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:45,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:46,045 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:46,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482732885] [2020-07-20 18:24:46,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:46,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:46,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065428769] [2020-07-20 18:24:46,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:46,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:46,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:46,051 INFO L87 Difference]: Start difference. First operand 12445 states and 20341 transitions. Second operand 3 states. [2020-07-20 18:24:46,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:46,726 INFO L93 Difference]: Finished difference Result 37194 states and 60783 transitions. [2020-07-20 18:24:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:46,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 479 [2020-07-20 18:24:46,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:46,795 INFO L225 Difference]: With dead ends: 37194 [2020-07-20 18:24:46,795 INFO L226 Difference]: Without dead ends: 24822 [2020-07-20 18:24:46,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24822 states. [2020-07-20 18:24:47,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24822 to 12494. [2020-07-20 18:24:47,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12494 states. [2020-07-20 18:24:47,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12494 states to 12494 states and 20414 transitions. [2020-07-20 18:24:47,460 INFO L78 Accepts]: Start accepts. Automaton has 12494 states and 20414 transitions. Word has length 479 [2020-07-20 18:24:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:47,460 INFO L479 AbstractCegarLoop]: Abstraction has 12494 states and 20414 transitions. [2020-07-20 18:24:47,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 12494 states and 20414 transitions. [2020-07-20 18:24:47,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-20 18:24:47,486 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:47,486 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] [2020-07-20 18:24:47,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:47,701 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:47,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:47,701 INFO L82 PathProgramCache]: Analyzing trace with hash 86039761, now seen corresponding path program 1 times [2020-07-20 18:24:47,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:47,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971045324] [2020-07-20 18:24:47,703 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 [2020-07-20 18:24:48,151 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:48,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:48,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 2514 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:48,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:48,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:48,303 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:48,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971045324] [2020-07-20 18:24:48,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:48,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:48,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984568040] [2020-07-20 18:24:48,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:48,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:48,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:48,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:48,306 INFO L87 Difference]: Start difference. First operand 12494 states and 20414 transitions. Second operand 3 states. [2020-07-20 18:24:48,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:48,877 INFO L93 Difference]: Finished difference Result 36912 states and 60266 transitions. [2020-07-20 18:24:48,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:48,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-20 18:24:48,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:48,933 INFO L225 Difference]: With dead ends: 36912 [2020-07-20 18:24:48,934 INFO L226 Difference]: Without dead ends: 24707 [2020-07-20 18:24:48,962 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 [2020-07-20 18:24:48,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24707 states. [2020-07-20 18:24:49,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24707 to 12632. [2020-07-20 18:24:49,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12632 states. [2020-07-20 18:24:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12632 states to 12632 states and 20628 transitions. [2020-07-20 18:24:49,556 INFO L78 Accepts]: Start accepts. Automaton has 12632 states and 20628 transitions. Word has length 480 [2020-07-20 18:24:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:49,557 INFO L479 AbstractCegarLoop]: Abstraction has 12632 states and 20628 transitions. [2020-07-20 18:24:49,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 12632 states and 20628 transitions. [2020-07-20 18:24:49,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-20 18:24:49,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:49,600 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] [2020-07-20 18:24:49,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:49,815 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:49,815 INFO L82 PathProgramCache]: Analyzing trace with hash 863063069, now seen corresponding path program 1 times [2020-07-20 18:24:49,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:49,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833212101] [2020-07-20 18:24:49,816 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 [2020-07-20 18:24:50,292 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:24:50,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:50,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 2514 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:24:50,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:50,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:50,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833212101] [2020-07-20 18:24:50,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:50,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:24:50,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733610650] [2020-07-20 18:24:50,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:24:50,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:24:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:24:50,553 INFO L87 Difference]: Start difference. First operand 12632 states and 20628 transitions. Second operand 4 states. [2020-07-20 18:24:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:51,284 INFO L93 Difference]: Finished difference Result 31108 states and 51219 transitions. [2020-07-20 18:24:51,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:24:51,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-20 18:24:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:51,314 INFO L225 Difference]: With dead ends: 31108 [2020-07-20 18:24:51,314 INFO L226 Difference]: Without dead ends: 16064 [2020-07-20 18:24:51,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:24:51,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16064 states. [2020-07-20 18:24:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16064 to 15921. [2020-07-20 18:24:52,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15921 states. [2020-07-20 18:24:52,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15921 states to 15921 states and 26129 transitions. [2020-07-20 18:24:52,586 INFO L78 Accepts]: Start accepts. Automaton has 15921 states and 26129 transitions. Word has length 480 [2020-07-20 18:24:52,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:52,587 INFO L479 AbstractCegarLoop]: Abstraction has 15921 states and 26129 transitions. [2020-07-20 18:24:52,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:24:52,587 INFO L276 IsEmpty]: Start isEmpty. Operand 15921 states and 26129 transitions. [2020-07-20 18:24:52,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-20 18:24:52,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:52,614 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] [2020-07-20 18:24:52,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:52,821 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:52,822 INFO L82 PathProgramCache]: Analyzing trace with hash -853401411, now seen corresponding path program 1 times [2020-07-20 18:24:52,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:52,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722387570] [2020-07-20 18:24:52,824 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 [2020-07-20 18:24:53,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:24:53,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:53,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 2718 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:53,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:53,700 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:53,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722387570] [2020-07-20 18:24:53,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:53,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:53,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571348175] [2020-07-20 18:24:53,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:53,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:53,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:53,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:53,705 INFO L87 Difference]: Start difference. First operand 15921 states and 26129 transitions. Second operand 3 states. [2020-07-20 18:24:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:55,067 INFO L93 Difference]: Finished difference Result 44614 states and 72936 transitions. [2020-07-20 18:24:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:55,068 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-20 18:24:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:55,103 INFO L225 Difference]: With dead ends: 44614 [2020-07-20 18:24:55,103 INFO L226 Difference]: Without dead ends: 30656 [2020-07-20 18:24:55,124 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 [2020-07-20 18:24:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30656 states. [2020-07-20 18:24:55,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30656 to 30640. [2020-07-20 18:24:55,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30640 states. [2020-07-20 18:24:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30640 states to 30640 states and 50036 transitions. [2020-07-20 18:24:56,036 INFO L78 Accepts]: Start accepts. Automaton has 30640 states and 50036 transitions. Word has length 481 [2020-07-20 18:24:56,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:56,036 INFO L479 AbstractCegarLoop]: Abstraction has 30640 states and 50036 transitions. [2020-07-20 18:24:56,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:56,036 INFO L276 IsEmpty]: Start isEmpty. Operand 30640 states and 50036 transitions. [2020-07-20 18:24:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-20 18:24:56,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:56,064 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] [2020-07-20 18:24:56,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:56,273 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:56,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1865456115, now seen corresponding path program 1 times [2020-07-20 18:24:56,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:56,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844564287] [2020-07-20 18:24:56,275 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 [2020-07-20 18:24:56,584 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:24:56,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:24:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 1364 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:24:56,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:24:56,736 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2020-07-20 18:24:56,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:24:56,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:24:56,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844564287] [2020-07-20 18:24:56,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:24:56,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:24:56,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046608765] [2020-07-20 18:24:56,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:24:56,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:24:56,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:24:56,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:56,845 INFO L87 Difference]: Start difference. First operand 30640 states and 50036 transitions. Second operand 3 states. [2020-07-20 18:24:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:24:58,488 INFO L93 Difference]: Finished difference Result 91448 states and 149300 transitions. [2020-07-20 18:24:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:24:58,489 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-20 18:24:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:24:58,549 INFO L225 Difference]: With dead ends: 91448 [2020-07-20 18:24:58,549 INFO L226 Difference]: Without dead ends: 61168 [2020-07-20 18:24:58,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:24:58,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61168 states. [2020-07-20 18:24:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61168 to 30750. [2020-07-20 18:24:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30750 states. [2020-07-20 18:24:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30750 states to 30750 states and 50197 transitions. [2020-07-20 18:24:59,663 INFO L78 Accepts]: Start accepts. Automaton has 30750 states and 50197 transitions. Word has length 481 [2020-07-20 18:24:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:24:59,664 INFO L479 AbstractCegarLoop]: Abstraction has 30750 states and 50197 transitions. [2020-07-20 18:24:59,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:24:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 30750 states and 50197 transitions. [2020-07-20 18:24:59,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-20 18:24:59,697 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:24:59,697 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] [2020-07-20 18:24:59,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:24:59,904 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:24:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:24:59,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1168647316, now seen corresponding path program 1 times [2020-07-20 18:24:59,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:24:59,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574010382] [2020-07-20 18:24:59,906 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 [2020-07-20 18:25:00,330 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:25:00,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:25:00,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1364 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:25:00,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:25:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:25:00,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:25:00,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574010382] [2020-07-20 18:25:00,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:25:00,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:25:00,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648518682] [2020-07-20 18:25:00,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:25:00,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:25:00,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:25:00,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:25:00,437 INFO L87 Difference]: Start difference. First operand 30750 states and 50197 transitions. Second operand 3 states. [2020-07-20 18:25:03,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:25:03,112 INFO L93 Difference]: Finished difference Result 90807 states and 148161 transitions. [2020-07-20 18:25:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:25:03,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-20 18:25:03,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:25:03,175 INFO L225 Difference]: With dead ends: 90807 [2020-07-20 18:25:03,175 INFO L226 Difference]: Without dead ends: 60753 [2020-07-20 18:25:03,209 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 [2020-07-20 18:25:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60753 states. [2020-07-20 18:25:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60753 to 31123. [2020-07-20 18:25:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31123 states. [2020-07-20 18:25:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31123 states to 31123 states and 50724 transitions. [2020-07-20 18:25:04,385 INFO L78 Accepts]: Start accepts. Automaton has 31123 states and 50724 transitions. Word has length 482 [2020-07-20 18:25:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:25:04,385 INFO L479 AbstractCegarLoop]: Abstraction has 31123 states and 50724 transitions. [2020-07-20 18:25:04,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:25:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 31123 states and 50724 transitions. [2020-07-20 18:25:04,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 18:25:04,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:25:04,420 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] [2020-07-20 18:25:04,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:25:04,635 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:25:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:25:04,636 INFO L82 PathProgramCache]: Analyzing trace with hash 222836974, now seen corresponding path program 1 times [2020-07-20 18:25:04,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:25:04,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462842186] [2020-07-20 18:25:04,637 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 [2020-07-20 18:25:04,959 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:25:04,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:25:04,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1363 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:25:04,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:25:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:25:05,210 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:25:05,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462842186] [2020-07-20 18:25:05,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:25:05,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:25:05,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846305257] [2020-07-20 18:25:05,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:25:05,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:25:05,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:25:05,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:25:05,213 INFO L87 Difference]: Start difference. First operand 31123 states and 50724 transitions. Second operand 3 states. [2020-07-20 18:25:07,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:25:07,113 INFO L93 Difference]: Finished difference Result 87144 states and 141598 transitions. [2020-07-20 18:25:07,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:25:07,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-20 18:25:07,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:25:07,176 INFO L225 Difference]: With dead ends: 87144 [2020-07-20 18:25:07,176 INFO L226 Difference]: Without dead ends: 60070 [2020-07-20 18:25:07,206 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 [2020-07-20 18:25:07,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60070 states. [2020-07-20 18:25:09,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60070 to 60056. [2020-07-20 18:25:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60056 states. [2020-07-20 18:25:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60056 states to 60056 states and 97490 transitions. [2020-07-20 18:25:09,440 INFO L78 Accepts]: Start accepts. Automaton has 60056 states and 97490 transitions. Word has length 483 [2020-07-20 18:25:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:25:09,440 INFO L479 AbstractCegarLoop]: Abstraction has 60056 states and 97490 transitions. [2020-07-20 18:25:09,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:25:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 60056 states and 97490 transitions. [2020-07-20 18:25:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 18:25:09,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:25:09,492 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] [2020-07-20 18:25:09,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:25:09,693 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:25:09,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:25:09,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1078241423, now seen corresponding path program 1 times [2020-07-20 18:25:09,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:25:09,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279454173] [2020-07-20 18:25:09,696 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 [2020-07-20 18:25:10,208 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:25:10,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:25:10,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 1364 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:25:10,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:25:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:25:10,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:25:10,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279454173] [2020-07-20 18:25:10,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:25:10,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:25:10,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959040279] [2020-07-20 18:25:10,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:25:10,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:25:10,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:25:10,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:25:10,346 INFO L87 Difference]: Start difference. First operand 60056 states and 97490 transitions. Second operand 4 states. [2020-07-20 18:25:15,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:25:15,584 INFO L93 Difference]: Finished difference Result 169220 states and 273401 transitions. [2020-07-20 18:25:15,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:25:15,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-07-20 18:25:15,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:25:15,710 INFO L225 Difference]: With dead ends: 169220 [2020-07-20 18:25:15,711 INFO L226 Difference]: Without dead ends: 116415 [2020-07-20 18:25:15,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:25:15,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116415 states. [2020-07-20 18:25:18,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116415 to 64948. [2020-07-20 18:25:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64948 states. [2020-07-20 18:25:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64948 states to 64948 states and 105981 transitions. [2020-07-20 18:25:18,498 INFO L78 Accepts]: Start accepts. Automaton has 64948 states and 105981 transitions. Word has length 483 [2020-07-20 18:25:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:25:18,498 INFO L479 AbstractCegarLoop]: Abstraction has 64948 states and 105981 transitions. [2020-07-20 18:25:18,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:25:18,498 INFO L276 IsEmpty]: Start isEmpty. Operand 64948 states and 105981 transitions. [2020-07-20 18:25:18,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 18:25:18,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:25:18,550 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] [2020-07-20 18:25:18,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:25:18,751 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:25:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:25:18,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1522297489, now seen corresponding path program 1 times [2020-07-20 18:25:18,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:25:18,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263449602] [2020-07-20 18:25:18,753 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 [2020-07-20 18:25:19,206 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:25:19,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:25:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:25:19,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:25:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:25:19,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:25:19,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263449602] [2020-07-20 18:25:19,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:25:19,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:25:19,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633484722] [2020-07-20 18:25:19,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:25:19,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:25:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:25:19,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:25:19,321 INFO L87 Difference]: Start difference. First operand 64948 states and 105981 transitions. Second operand 3 states. [2020-07-20 18:25:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:25:25,473 INFO L93 Difference]: Finished difference Result 184656 states and 300591 transitions. [2020-07-20 18:25:25,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:25:25,474 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-20 18:25:25,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:25:25,614 INFO L225 Difference]: With dead ends: 184656 [2020-07-20 18:25:25,615 INFO L226 Difference]: Without dead ends: 123668 [2020-07-20 18:25:25,668 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 [2020-07-20 18:25:25,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123668 states. [2020-07-20 18:25:28,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123668 to 64822. [2020-07-20 18:25:28,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64822 states. [2020-07-20 18:25:28,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64822 states to 64822 states and 105763 transitions. [2020-07-20 18:25:28,592 INFO L78 Accepts]: Start accepts. Automaton has 64822 states and 105763 transitions. Word has length 483 [2020-07-20 18:25:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:25:28,592 INFO L479 AbstractCegarLoop]: Abstraction has 64822 states and 105763 transitions. [2020-07-20 18:25:28,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:25:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 64822 states and 105763 transitions. [2020-07-20 18:25:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 18:25:28,648 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:25:28,648 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:25:28,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:25:28,849 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:25:28,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:25:28,850 INFO L82 PathProgramCache]: Analyzing trace with hash -55065567, now seen corresponding path program 1 times [2020-07-20 18:25:28,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:25:28,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095397866] [2020-07-20 18:25:28,851 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 [2020-07-20 18:25:29,348 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:25:29,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:25:29,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 2720 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:25:29,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:25:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:25:29,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:25:29,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095397866] [2020-07-20 18:25:29,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:25:29,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:25:29,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403203382] [2020-07-20 18:25:29,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:25:29,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:25:29,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:25:29,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:25:29,544 INFO L87 Difference]: Start difference. First operand 64822 states and 105763 transitions. Second operand 3 states. [2020-07-20 18:25:36,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:25:36,151 INFO L93 Difference]: Finished difference Result 183389 states and 298265 transitions. [2020-07-20 18:25:36,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:25:36,152 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-20 18:25:36,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:25:36,283 INFO L225 Difference]: With dead ends: 183389 [2020-07-20 18:25:36,283 INFO L226 Difference]: Without dead ends: 125906 [2020-07-20 18:25:36,336 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 [2020-07-20 18:25:36,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125906 states. [2020-07-20 18:25:41,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125906 to 125415. [2020-07-20 18:25:41,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125415 states. [2020-07-20 18:25:41,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125415 states to 125415 states and 203562 transitions. [2020-07-20 18:25:41,684 INFO L78 Accepts]: Start accepts. Automaton has 125415 states and 203562 transitions. Word has length 483 [2020-07-20 18:25:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:25:41,684 INFO L479 AbstractCegarLoop]: Abstraction has 125415 states and 203562 transitions. [2020-07-20 18:25:41,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:25:41,684 INFO L276 IsEmpty]: Start isEmpty. Operand 125415 states and 203562 transitions. [2020-07-20 18:25:41,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-20 18:25:41,799 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:25:41,799 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] [2020-07-20 18:25:41,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:25:42,000 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:25:42,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:25:42,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1541142054, now seen corresponding path program 1 times [2020-07-20 18:25:42,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:25:42,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729388922] [2020-07-20 18:25:42,002 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 [2020-07-20 18:25:42,304 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:25:42,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:25:42,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1363 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:25:42,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:25:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:25:42,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:25:42,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729388922] [2020-07-20 18:25:42,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:25:42,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:25:42,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317522897] [2020-07-20 18:25:42,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:25:42,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:25:42,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:25:42,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:25:42,859 INFO L87 Difference]: Start difference. First operand 125415 states and 203562 transitions. Second operand 4 states. [2020-07-20 18:25:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:25:54,315 INFO L93 Difference]: Finished difference Result 343706 states and 554051 transitions. [2020-07-20 18:25:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:25:54,315 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-07-20 18:25:54,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:25:54,572 INFO L225 Difference]: With dead ends: 343706 [2020-07-20 18:25:54,572 INFO L226 Difference]: Without dead ends: 237623 [2020-07-20 18:25:54,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:25:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237623 states. [2020-07-20 18:26:05,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237623 to 139056. [2020-07-20 18:26:05,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139056 states. [2020-07-20 18:26:05,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139056 states to 139056 states and 226774 transitions. [2020-07-20 18:26:05,261 INFO L78 Accepts]: Start accepts. Automaton has 139056 states and 226774 transitions. Word has length 483 [2020-07-20 18:26:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:26:05,261 INFO L479 AbstractCegarLoop]: Abstraction has 139056 states and 226774 transitions. [2020-07-20 18:26:05,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:26:05,262 INFO L276 IsEmpty]: Start isEmpty. Operand 139056 states and 226774 transitions. [2020-07-20 18:26:05,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 18:26:05,386 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:26:05,387 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] [2020-07-20 18:26:05,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:26:05,588 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:26:05,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:26:05,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1349821851, now seen corresponding path program 1 times [2020-07-20 18:26:05,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:26:05,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901264734] [2020-07-20 18:26:05,590 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 [2020-07-20 18:26:06,045 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:26:06,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:26:06,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 2518 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:26:06,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:26:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:26:06,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:26:06,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901264734] [2020-07-20 18:26:06,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:26:06,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:26:06,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172458145] [2020-07-20 18:26:06,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:26:06,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:26:06,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:26:06,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:26:06,150 INFO L87 Difference]: Start difference. First operand 139056 states and 226774 transitions. Second operand 3 states. [2020-07-20 18:26:21,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:26:21,516 INFO L93 Difference]: Finished difference Result 412077 states and 671805 transitions. [2020-07-20 18:26:21,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:26:21,517 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 484 [2020-07-20 18:26:21,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:26:21,838 INFO L225 Difference]: With dead ends: 412077 [2020-07-20 18:26:21,838 INFO L226 Difference]: Without dead ends: 274193 [2020-07-20 18:26:21,941 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 [2020-07-20 18:26:22,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274193 states. [2020-07-20 18:26:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274193 to 140724. [2020-07-20 18:26:29,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140724 states. [2020-07-20 18:26:29,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140724 states to 140724 states and 229097 transitions. [2020-07-20 18:26:29,845 INFO L78 Accepts]: Start accepts. Automaton has 140724 states and 229097 transitions. Word has length 484 [2020-07-20 18:26:29,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:26:29,845 INFO L479 AbstractCegarLoop]: Abstraction has 140724 states and 229097 transitions. [2020-07-20 18:26:29,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:26:29,845 INFO L276 IsEmpty]: Start isEmpty. Operand 140724 states and 229097 transitions. [2020-07-20 18:26:29,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 18:26:29,969 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:26:29,969 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] [2020-07-20 18:26:30,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:26:30,178 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:26:30,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:26:30,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1175160519, now seen corresponding path program 1 times [2020-07-20 18:26:30,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:26:30,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854399176] [2020-07-20 18:26:30,179 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 [2020-07-20 18:26:30,653 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:26:30,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:26:30,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 2520 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:26:30,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:26:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:26:30,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:26:30,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854399176] [2020-07-20 18:26:30,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:26:30,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:26:30,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152136549] [2020-07-20 18:26:30,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:26:30,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:26:30,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:26:30,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:26:30,789 INFO L87 Difference]: Start difference. First operand 140724 states and 229097 transitions. Second operand 4 states. [2020-07-20 18:26:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:26:45,883 INFO L93 Difference]: Finished difference Result 344055 states and 563829 transitions. [2020-07-20 18:26:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:26:45,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-20 18:26:45,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:26:46,083 INFO L225 Difference]: With dead ends: 344055 [2020-07-20 18:26:46,084 INFO L226 Difference]: Without dead ends: 178909 [2020-07-20 18:26:46,182 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 [2020-07-20 18:26:46,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178909 states. [2020-07-20 18:26:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178909 to 178892. [2020-07-20 18:26:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178892 states. [2020-07-20 18:26:55,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178892 states to 178892 states and 291912 transitions. [2020-07-20 18:26:55,537 INFO L78 Accepts]: Start accepts. Automaton has 178892 states and 291912 transitions. Word has length 485 [2020-07-20 18:26:55,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:26:55,537 INFO L479 AbstractCegarLoop]: Abstraction has 178892 states and 291912 transitions. [2020-07-20 18:26:55,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:26:55,538 INFO L276 IsEmpty]: Start isEmpty. Operand 178892 states and 291912 transitions. [2020-07-20 18:26:55,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 18:26:55,725 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:26:55,726 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] [2020-07-20 18:26:55,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:26:55,934 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:26:55,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:26:55,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1211012288, now seen corresponding path program 1 times [2020-07-20 18:26:55,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:26:55,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380204070] [2020-07-20 18:26:55,936 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 [2020-07-20 18:26:56,416 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:26:56,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:26:56,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 2539 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:26:56,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:26:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:26:57,390 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:26:57,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380204070] [2020-07-20 18:26:57,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:26:57,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 18:26:57,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909146493] [2020-07-20 18:26:57,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 18:26:57,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:26:57,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 18:26:57,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:26:57,392 INFO L87 Difference]: Start difference. First operand 178892 states and 291912 transitions. Second operand 5 states. [2020-07-20 18:27:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:27:14,366 INFO L93 Difference]: Finished difference Result 243881 states and 391742 transitions. [2020-07-20 18:27:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:27:14,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2020-07-20 18:27:14,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:27:14,602 INFO L225 Difference]: With dead ends: 243881 [2020-07-20 18:27:14,602 INFO L226 Difference]: Without dead ends: 231278 [2020-07-20 18:27:14,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 18:27:14,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231278 states. [2020-07-20 18:27:29,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231278 to 231276. [2020-07-20 18:27:29,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231276 states. [2020-07-20 18:27:29,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231276 states to 231276 states and 370700 transitions. [2020-07-20 18:27:29,837 INFO L78 Accepts]: Start accepts. Automaton has 231276 states and 370700 transitions. Word has length 485 [2020-07-20 18:27:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:27:29,838 INFO L479 AbstractCegarLoop]: Abstraction has 231276 states and 370700 transitions. [2020-07-20 18:27:29,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 18:27:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 231276 states and 370700 transitions. [2020-07-20 18:27:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 18:27:30,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:27:30,066 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] [2020-07-20 18:27:30,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:27:30,267 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:27:30,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:27:30,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1653825809, now seen corresponding path program 1 times [2020-07-20 18:27:30,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:27:30,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403811884] [2020-07-20 18:27:30,269 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 [2020-07-20 18:27:30,729 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:27:30,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:27:30,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 2542 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 18:27:30,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:27:30,828 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:27:30,863 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:27:30,887 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:27:31,041 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:27:31,107 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:27:31,160 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:27:31,162 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:27:31,163 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:27:31,164 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 18:27:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:27:35,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:27:35,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403811884] [2020-07-20 18:27:35,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:27:35,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-20 18:27:35,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540920886] [2020-07-20 18:27:35,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 18:27:35,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:27:35,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 18:27:35,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-07-20 18:27:35,427 INFO L87 Difference]: Start difference. First operand 231276 states and 370700 transitions. Second operand 13 states. [2020-07-20 18:28:06,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:28:06,199 INFO L93 Difference]: Finished difference Result 410162 states and 641492 transitions. [2020-07-20 18:28:06,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 18:28:06,200 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 485 [2020-07-20 18:28:06,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:28:06,594 INFO L225 Difference]: With dead ends: 410162 [2020-07-20 18:28:06,594 INFO L226 Difference]: Without dead ends: 384959 [2020-07-20 18:28:06,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 472 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2020-07-20 18:28:06,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384959 states. [2020-07-20 18:28:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384959 to 256348. [2020-07-20 18:28:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256348 states. [2020-07-20 18:28:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256348 states to 256348 states and 407404 transitions. [2020-07-20 18:28:31,618 INFO L78 Accepts]: Start accepts. Automaton has 256348 states and 407404 transitions. Word has length 485 [2020-07-20 18:28:31,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:28:31,618 INFO L479 AbstractCegarLoop]: Abstraction has 256348 states and 407404 transitions. [2020-07-20 18:28:31,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 18:28:31,619 INFO L276 IsEmpty]: Start isEmpty. Operand 256348 states and 407404 transitions. [2020-07-20 18:28:31,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-20 18:28:31,855 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:28:31,855 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] [2020-07-20 18:28:32,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:28:32,056 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:28:32,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:28:32,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1314767047, now seen corresponding path program 1 times [2020-07-20 18:28:32,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:28:32,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465886813] [2020-07-20 18:28:32,058 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 [2020-07-20 18:28:32,565 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:28:32,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:28:32,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 2738 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:28:32,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:28:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:28:32,800 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:28:32,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465886813] [2020-07-20 18:28:32,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:28:32,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:28:32,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795680720] [2020-07-20 18:28:32,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:28:32,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:28:32,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:28:32,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:28:32,802 INFO L87 Difference]: Start difference. First operand 256348 states and 407404 transitions. Second operand 4 states. [2020-07-20 18:29:10,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:29:10,340 INFO L93 Difference]: Finished difference Result 739857 states and 1174241 transitions. [2020-07-20 18:29:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:29:10,341 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 485 [2020-07-20 18:29:10,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:29:10,945 INFO L225 Difference]: With dead ends: 739857 [2020-07-20 18:29:10,945 INFO L226 Difference]: Without dead ends: 489344 [2020-07-20 18:29:11,126 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 [2020-07-20 18:29:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489344 states. [2020-07-20 18:29:59,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489344 to 489082. [2020-07-20 18:29:59,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489082 states. [2020-07-20 18:30:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489082 states to 489082 states and 771739 transitions. [2020-07-20 18:30:00,197 INFO L78 Accepts]: Start accepts. Automaton has 489082 states and 771739 transitions. Word has length 485 [2020-07-20 18:30:00,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:30:00,197 INFO L479 AbstractCegarLoop]: Abstraction has 489082 states and 771739 transitions. [2020-07-20 18:30:00,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:30:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 489082 states and 771739 transitions. [2020-07-20 18:30:00,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 18:30:00,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:30:00,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:30:00,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:30:00,901 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:30:00,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:30:00,902 INFO L82 PathProgramCache]: Analyzing trace with hash -64781200, now seen corresponding path program 1 times [2020-07-20 18:30:00,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:30:00,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157299363] [2020-07-20 18:30:00,903 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 [2020-07-20 18:30:01,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:30:01,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:30:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 2737 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:30:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:30:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:30:02,967 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:30:02,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157299363] [2020-07-20 18:30:02,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:30:02,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:30:02,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75696461] [2020-07-20 18:30:02,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:30:02,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:30:02,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:30:02,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:30:02,969 INFO L87 Difference]: Start difference. First operand 489082 states and 771739 transitions. Second operand 3 states. [2020-07-20 18:31:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:31:26,735 INFO L93 Difference]: Finished difference Result 1420842 states and 2238926 transitions. [2020-07-20 18:31:26,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:31:26,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 487 [2020-07-20 18:31:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:31:28,102 INFO L225 Difference]: With dead ends: 1420842 [2020-07-20 18:31:28,103 INFO L226 Difference]: Without dead ends: 961130 [2020-07-20 18:31:28,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:31:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961130 states. [2020-07-20 18:33:03,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961130 to 960959. [2020-07-20 18:33:03,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 960959 states. [2020-07-20 18:33:05,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960959 states to 960959 states and 1509185 transitions. [2020-07-20 18:33:05,142 INFO L78 Accepts]: Start accepts. Automaton has 960959 states and 1509185 transitions. Word has length 487 [2020-07-20 18:33:05,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:33:05,142 INFO L479 AbstractCegarLoop]: Abstraction has 960959 states and 1509185 transitions. [2020-07-20 18:33:05,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:33:05,142 INFO L276 IsEmpty]: Start isEmpty. Operand 960959 states and 1509185 transitions. [2020-07-20 18:33:07,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 18:33:07,839 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:33:07,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:33:08,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:33:08,050 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:33:08,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:33:08,051 INFO L82 PathProgramCache]: Analyzing trace with hash -773683179, now seen corresponding path program 1 times [2020-07-20 18:33:08,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:33:08,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917939716] [2020-07-20 18:33:08,052 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 [2020-07-20 18:33:08,520 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:33:08,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:33:08,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 2544 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:33:08,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:33:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:33:08,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:33:08,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917939716] [2020-07-20 18:33:08,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:33:08,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:33:08,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793036900] [2020-07-20 18:33:08,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:33:08,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:33:08,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:33:08,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:33:08,637 INFO L87 Difference]: Start difference. First operand 960959 states and 1509185 transitions. Second operand 4 states. [2020-07-20 18:35:16,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:16,940 INFO L93 Difference]: Finished difference Result 2354294 states and 3729331 transitions. [2020-07-20 18:35:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:35:16,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-07-20 18:35:16,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:18,776 INFO L225 Difference]: With dead ends: 2354294 [2020-07-20 18:35:18,777 INFO L226 Difference]: Without dead ends: 1200482 [2020-07-20 18:35:19,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:35:20,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200482 states.