/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:18:22,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:18:22,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:18:22,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:18:22,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:18:22,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:18:22,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:18:22,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:18:22,157 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:18:22,158 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:18:22,159 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:18:22,160 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:18:22,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:18:22,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:18:22,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:18:22,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:18:22,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:18:22,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:18:22,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:18:22,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:18:22,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:18:22,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:18:22,171 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:18:22,171 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:18:22,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:18:22,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 02:18:22,177 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 02:18:22,178 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 02:18:22,179 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 02:18:22,180 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 02:18:22,180 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 02:18:22,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 02:18:22,181 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 02:18:22,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:18:22,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:18:22,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:18:22,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 02:18:22,197 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:18:22,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:18:22,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:18:22,199 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:18:22,199 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:18:22,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:18:22,200 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:18:22,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:18:22,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:18:22,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:18:22,200 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:18:22,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:18:22,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:18:22,201 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:18:22,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:18:22,201 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:18:22,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:18:22,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:18:22,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:18:22,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:18:22,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:18:22,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:18:22,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:18:22,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:18:22,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:18:22,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:18:22,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:22,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:18:22,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:18:22,204 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 02:18:22,507 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:18:22,527 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:18:22,531 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:18:22,533 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:18:22,534 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:18:22,536 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 02:18:22,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30f7cd971/971b2290efb8425591d46a7773203e5b/FLAGddfa2bcfe [2020-07-21 02:18:23,328 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:18:23,329 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 02:18:23,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30f7cd971/971b2290efb8425591d46a7773203e5b/FLAGddfa2bcfe [2020-07-21 02:18:23,484 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30f7cd971/971b2290efb8425591d46a7773203e5b [2020-07-21 02:18:23,498 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:18:23,501 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:18:23,503 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:18:23,503 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:18:23,507 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:18:23,508 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:18:23" (1/1) ... [2020-07-21 02:18:23,511 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc8845c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:23, skipping insertion in model container [2020-07-21 02:18:23,511 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:18:23" (1/1) ... [2020-07-21 02:18:23,520 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:18:23,698 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:18:25,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:18:25,191 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:18:26,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:18:26,313 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:18:26,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:26 WrapperNode [2020-07-21 02:18:26,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:18:26,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:18:26,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:18:26,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:18:26,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:26" (1/1) ... [2020-07-21 02:18:26,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:26" (1/1) ... [2020-07-21 02:18:26,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:26" (1/1) ... [2020-07-21 02:18:26,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:26" (1/1) ... [2020-07-21 02:18:26,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:26" (1/1) ... [2020-07-21 02:18:26,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:26" (1/1) ... [2020-07-21 02:18:26,541 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:26" (1/1) ... [2020-07-21 02:18:26,570 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:18:26,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:18:26,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:18:26,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:18:26,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:18:26,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:18:26,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:18:26,667 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:18:26,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:18:26,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:18:26,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:18:26,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:18:26,669 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:18:26,669 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:18:26,670 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:18:26,671 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:18:26,671 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:18:26,671 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:18:26,671 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:18:26,671 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:18:26,672 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:18:26,673 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-21 02:18:26,673 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:18:26,673 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:18:26,673 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:18:26,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:18:26,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:18:30,903 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:18:30,903 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:18:30,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:18:30 BoogieIcfgContainer [2020-07-21 02:18:30,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:18:30,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:18:30,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:18:30,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:18:30,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:18:23" (1/3) ... [2020-07-21 02:18:30,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7442ac75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:18:30, skipping insertion in model container [2020-07-21 02:18:30,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:18:26" (2/3) ... [2020-07-21 02:18:30,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7442ac75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:18:30, skipping insertion in model container [2020-07-21 02:18:30,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:18:30" (3/3) ... [2020-07-21 02:18:30,925 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-07-21 02:18:30,937 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:18:30,947 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-07-21 02:18:30,964 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-07-21 02:18:30,997 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:18:30,997 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:18:30,997 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:18:30,997 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:18:30,998 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:18:30,998 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:18:30,998 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:18:30,998 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:18:31,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states. [2020-07-21 02:18:31,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 02:18:31,074 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:31,076 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] [2020-07-21 02:18:31,076 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:31,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:31,083 INFO L82 PathProgramCache]: Analyzing trace with hash -856462850, now seen corresponding path program 1 times [2020-07-21 02:18:31,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:31,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881181990] [2020-07-21 02:18:31,093 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:31,749 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:31,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:31,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 2046 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:18:31,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:32,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:32,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881181990] [2020-07-21 02:18:32,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:32,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:18:32,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522971382] [2020-07-21 02:18:32,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:18:32,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:18:32,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:18:32,267 INFO L87 Difference]: Start difference. First operand 1371 states. Second operand 4 states. [2020-07-21 02:18:32,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:32,768 INFO L93 Difference]: Finished difference Result 4060 states and 7352 transitions. [2020-07-21 02:18:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:18:32,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 464 [2020-07-21 02:18:32,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:32,804 INFO L225 Difference]: With dead ends: 4060 [2020-07-21 02:18:32,805 INFO L226 Difference]: Without dead ends: 2696 [2020-07-21 02:18:32,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:18:32,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2020-07-21 02:18:33,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2656. [2020-07-21 02:18:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2656 states. [2020-07-21 02:18:33,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2656 states to 2656 states and 4363 transitions. [2020-07-21 02:18:33,027 INFO L78 Accepts]: Start accepts. Automaton has 2656 states and 4363 transitions. Word has length 464 [2020-07-21 02:18:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:33,031 INFO L479 AbstractCegarLoop]: Abstraction has 2656 states and 4363 transitions. [2020-07-21 02:18:33,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:18:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2656 states and 4363 transitions. [2020-07-21 02:18:33,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-07-21 02:18:33,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:33,047 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:33,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:33,261 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:33,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1436067214, now seen corresponding path program 1 times [2020-07-21 02:18:33,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:33,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461124628] [2020-07-21 02:18:33,264 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:33,742 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:33,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:33,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:33,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:34,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:34,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461124628] [2020-07-21 02:18:34,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:34,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:34,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113008904] [2020-07-21 02:18:34,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:34,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:34,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:34,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:34,155 INFO L87 Difference]: Start difference. First operand 2656 states and 4363 transitions. Second operand 3 states. [2020-07-21 02:18:34,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:34,477 INFO L93 Difference]: Finished difference Result 7666 states and 12551 transitions. [2020-07-21 02:18:34,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:34,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 466 [2020-07-21 02:18:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:34,507 INFO L225 Difference]: With dead ends: 7666 [2020-07-21 02:18:34,507 INFO L226 Difference]: Without dead ends: 5239 [2020-07-21 02:18:34,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2020-07-21 02:18:34,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 5201. [2020-07-21 02:18:34,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5201 states. [2020-07-21 02:18:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5201 states to 5201 states and 8518 transitions. [2020-07-21 02:18:34,724 INFO L78 Accepts]: Start accepts. Automaton has 5201 states and 8518 transitions. Word has length 466 [2020-07-21 02:18:34,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:34,725 INFO L479 AbstractCegarLoop]: Abstraction has 5201 states and 8518 transitions. [2020-07-21 02:18:34,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:34,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5201 states and 8518 transitions. [2020-07-21 02:18:34,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-21 02:18:34,743 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:34,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:34,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:34,959 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:34,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1621467042, now seen corresponding path program 1 times [2020-07-21 02:18:34,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:34,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110845070] [2020-07-21 02:18:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:35,299 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:35,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:35,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:35,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:35,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:35,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110845070] [2020-07-21 02:18:35,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:35,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:35,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613486039] [2020-07-21 02:18:35,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:35,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:35,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:35,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:35,509 INFO L87 Difference]: Start difference. First operand 5201 states and 8518 transitions. Second operand 3 states. [2020-07-21 02:18:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:35,862 INFO L93 Difference]: Finished difference Result 15347 states and 25091 transitions. [2020-07-21 02:18:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:35,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 467 [2020-07-21 02:18:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:35,915 INFO L225 Difference]: With dead ends: 15347 [2020-07-21 02:18:35,915 INFO L226 Difference]: Without dead ends: 10177 [2020-07-21 02:18:35,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10177 states. [2020-07-21 02:18:36,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10177 to 5227. [2020-07-21 02:18:36,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5227 states. [2020-07-21 02:18:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5227 states to 5227 states and 8556 transitions. [2020-07-21 02:18:36,347 INFO L78 Accepts]: Start accepts. Automaton has 5227 states and 8556 transitions. Word has length 467 [2020-07-21 02:18:36,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:36,347 INFO L479 AbstractCegarLoop]: Abstraction has 5227 states and 8556 transitions. [2020-07-21 02:18:36,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 5227 states and 8556 transitions. [2020-07-21 02:18:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-21 02:18:36,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:36,377 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] [2020-07-21 02:18:36,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:36,637 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:36,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:36,638 INFO L82 PathProgramCache]: Analyzing trace with hash -874596179, now seen corresponding path program 1 times [2020-07-21 02:18:36,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:36,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461436686] [2020-07-21 02:18:36,639 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:36,996 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:36,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:37,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:18:37,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:37,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:37,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461436686] [2020-07-21 02:18:37,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:37,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:18:37,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064984577] [2020-07-21 02:18:37,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:18:37,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:37,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:18:37,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:18:37,141 INFO L87 Difference]: Start difference. First operand 5227 states and 8556 transitions. Second operand 4 states. [2020-07-21 02:18:37,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:37,704 INFO L93 Difference]: Finished difference Result 12486 states and 20625 transitions. [2020-07-21 02:18:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:18:37,705 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2020-07-21 02:18:37,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:37,756 INFO L225 Difference]: With dead ends: 12486 [2020-07-21 02:18:37,757 INFO L226 Difference]: Without dead ends: 6337 [2020-07-21 02:18:37,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:18:37,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6337 states. [2020-07-21 02:18:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6337 to 6299. [2020-07-21 02:18:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6299 states. [2020-07-21 02:18:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6299 states to 6299 states and 10372 transitions. [2020-07-21 02:18:38,044 INFO L78 Accepts]: Start accepts. Automaton has 6299 states and 10372 transitions. Word has length 468 [2020-07-21 02:18:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:38,044 INFO L479 AbstractCegarLoop]: Abstraction has 6299 states and 10372 transitions. [2020-07-21 02:18:38,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:18:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 6299 states and 10372 transitions. [2020-07-21 02:18:38,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 02:18:38,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:38,072 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:38,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:38,286 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:38,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:38,287 INFO L82 PathProgramCache]: Analyzing trace with hash 385088319, now seen corresponding path program 1 times [2020-07-21 02:18:38,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:38,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649055165] [2020-07-21 02:18:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:38,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:38,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:38,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:38,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:39,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:39,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:39,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649055165] [2020-07-21 02:18:39,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:39,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:39,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289592857] [2020-07-21 02:18:39,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:39,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:39,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:39,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:39,064 INFO L87 Difference]: Start difference. First operand 6299 states and 10372 transitions. Second operand 3 states. [2020-07-21 02:18:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:39,509 INFO L93 Difference]: Finished difference Result 18414 states and 30283 transitions. [2020-07-21 02:18:39,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:39,510 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2020-07-21 02:18:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:39,541 INFO L225 Difference]: With dead ends: 18414 [2020-07-21 02:18:39,541 INFO L226 Difference]: Without dead ends: 12491 [2020-07-21 02:18:39,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:39,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12491 states. [2020-07-21 02:18:39,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12491 to 12428. [2020-07-21 02:18:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12428 states. [2020-07-21 02:18:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12428 states to 12428 states and 20394 transitions. [2020-07-21 02:18:40,014 INFO L78 Accepts]: Start accepts. Automaton has 12428 states and 20394 transitions. Word has length 470 [2020-07-21 02:18:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:40,015 INFO L479 AbstractCegarLoop]: Abstraction has 12428 states and 20394 transitions. [2020-07-21 02:18:40,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:40,015 INFO L276 IsEmpty]: Start isEmpty. Operand 12428 states and 20394 transitions. [2020-07-21 02:18:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-07-21 02:18:40,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:40,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:40,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:40,268 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:40,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1045568230, now seen corresponding path program 1 times [2020-07-21 02:18:40,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:40,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782918951] [2020-07-21 02:18:40,270 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:40,638 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:40,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:40,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:40,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:41,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:41,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782918951] [2020-07-21 02:18:41,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:41,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:41,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027302] [2020-07-21 02:18:41,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:41,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:41,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:41,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:41,329 INFO L87 Difference]: Start difference. First operand 12428 states and 20394 transitions. Second operand 3 states. [2020-07-21 02:18:41,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:41,994 INFO L93 Difference]: Finished difference Result 37003 states and 60707 transitions. [2020-07-21 02:18:41,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:41,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 470 [2020-07-21 02:18:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:42,059 INFO L225 Difference]: With dead ends: 37003 [2020-07-21 02:18:42,060 INFO L226 Difference]: Without dead ends: 24712 [2020-07-21 02:18:42,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:42,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24712 states. [2020-07-21 02:18:42,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24712 to 12521. [2020-07-21 02:18:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12521 states. [2020-07-21 02:18:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12521 states to 12521 states and 20535 transitions. [2020-07-21 02:18:42,771 INFO L78 Accepts]: Start accepts. Automaton has 12521 states and 20535 transitions. Word has length 470 [2020-07-21 02:18:42,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:42,771 INFO L479 AbstractCegarLoop]: Abstraction has 12521 states and 20535 transitions. [2020-07-21 02:18:42,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 12521 states and 20535 transitions. [2020-07-21 02:18:42,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-21 02:18:42,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:42,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:43,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:43,014 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:43,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:43,015 INFO L82 PathProgramCache]: Analyzing trace with hash 785717655, now seen corresponding path program 1 times [2020-07-21 02:18:43,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:43,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783047232] [2020-07-21 02:18:43,015 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:43,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:43,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:43,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:43,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:43,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:43,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:43,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783047232] [2020-07-21 02:18:43,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:43,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:43,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22059688] [2020-07-21 02:18:43,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:43,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:43,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:43,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:43,491 INFO L87 Difference]: Start difference. First operand 12521 states and 20535 transitions. Second operand 3 states. [2020-07-21 02:18:44,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:44,148 INFO L93 Difference]: Finished difference Result 36619 states and 60011 transitions. [2020-07-21 02:18:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:44,149 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-21 02:18:44,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:44,194 INFO L225 Difference]: With dead ends: 36619 [2020-07-21 02:18:44,194 INFO L226 Difference]: Without dead ends: 24584 [2020-07-21 02:18:44,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24584 states. [2020-07-21 02:18:44,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24584 to 12673. [2020-07-21 02:18:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12673 states. [2020-07-21 02:18:44,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12673 states to 12673 states and 20759 transitions. [2020-07-21 02:18:44,844 INFO L78 Accepts]: Start accepts. Automaton has 12673 states and 20759 transitions. Word has length 471 [2020-07-21 02:18:44,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:44,844 INFO L479 AbstractCegarLoop]: Abstraction has 12673 states and 20759 transitions. [2020-07-21 02:18:44,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 12673 states and 20759 transitions. [2020-07-21 02:18:44,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-21 02:18:44,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:44,867 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:45,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:45,082 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:45,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2005156598, now seen corresponding path program 1 times [2020-07-21 02:18:45,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:45,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677284267] [2020-07-21 02:18:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:45,445 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:45,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:45,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1692 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:45,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:45,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:45,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677284267] [2020-07-21 02:18:45,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:45,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:45,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174560318] [2020-07-21 02:18:45,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:45,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:45,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:45,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:45,708 INFO L87 Difference]: Start difference. First operand 12673 states and 20759 transitions. Second operand 3 states. [2020-07-21 02:18:46,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:46,280 INFO L93 Difference]: Finished difference Result 37630 states and 61619 transitions. [2020-07-21 02:18:46,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:46,280 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 471 [2020-07-21 02:18:46,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:46,323 INFO L225 Difference]: With dead ends: 37630 [2020-07-21 02:18:46,323 INFO L226 Difference]: Without dead ends: 25148 [2020-07-21 02:18:46,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:46,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25148 states. [2020-07-21 02:18:47,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25148 to 12805. [2020-07-21 02:18:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12805 states. [2020-07-21 02:18:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12805 states to 12805 states and 20930 transitions. [2020-07-21 02:18:47,055 INFO L78 Accepts]: Start accepts. Automaton has 12805 states and 20930 transitions. Word has length 471 [2020-07-21 02:18:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:47,056 INFO L479 AbstractCegarLoop]: Abstraction has 12805 states and 20930 transitions. [2020-07-21 02:18:47,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand 12805 states and 20930 transitions. [2020-07-21 02:18:47,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2020-07-21 02:18:47,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:47,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:18:47,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:47,292 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:47,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:47,293 INFO L82 PathProgramCache]: Analyzing trace with hash -547855236, now seen corresponding path program 1 times [2020-07-21 02:18:47,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:47,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698908626] [2020-07-21 02:18:47,295 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:47,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:18:47,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:47,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:47,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:48,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:48,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698908626] [2020-07-21 02:18:48,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:48,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:48,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781904364] [2020-07-21 02:18:48,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:48,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:48,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:48,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:48,109 INFO L87 Difference]: Start difference. First operand 12805 states and 20930 transitions. Second operand 3 states. [2020-07-21 02:18:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:49,767 INFO L93 Difference]: Finished difference Result 36076 states and 58841 transitions. [2020-07-21 02:18:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:49,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 472 [2020-07-21 02:18:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:49,812 INFO L225 Difference]: With dead ends: 36076 [2020-07-21 02:18:49,812 INFO L226 Difference]: Without dead ends: 24815 [2020-07-21 02:18:49,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24815 states. [2020-07-21 02:18:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24815 to 24779. [2020-07-21 02:18:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24779 states. [2020-07-21 02:18:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24779 states to 24779 states and 40346 transitions. [2020-07-21 02:18:50,580 INFO L78 Accepts]: Start accepts. Automaton has 24779 states and 40346 transitions. Word has length 472 [2020-07-21 02:18:50,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:50,580 INFO L479 AbstractCegarLoop]: Abstraction has 24779 states and 40346 transitions. [2020-07-21 02:18:50,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 24779 states and 40346 transitions. [2020-07-21 02:18:50,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 02:18:50,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:50,606 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] [2020-07-21 02:18:50,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:50,814 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:50,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:50,815 INFO L82 PathProgramCache]: Analyzing trace with hash 185738140, now seen corresponding path program 1 times [2020-07-21 02:18:50,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:50,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711356513] [2020-07-21 02:18:50,816 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:51,169 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:51,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:51,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:51,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:51,370 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:51,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711356513] [2020-07-21 02:18:51,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:51,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:51,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217055856] [2020-07-21 02:18:51,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:51,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:51,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:51,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:51,372 INFO L87 Difference]: Start difference. First operand 24779 states and 40346 transitions. Second operand 3 states. [2020-07-21 02:18:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:52,562 INFO L93 Difference]: Finished difference Result 72065 states and 117382 transitions. [2020-07-21 02:18:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:18:52,562 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 474 [2020-07-21 02:18:52,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:52,639 INFO L225 Difference]: With dead ends: 72065 [2020-07-21 02:18:52,639 INFO L226 Difference]: Without dead ends: 48460 [2020-07-21 02:18:52,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:52,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48460 states. [2020-07-21 02:18:53,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48460 to 25147. [2020-07-21 02:18:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25147 states. [2020-07-21 02:18:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25147 states to 25147 states and 40886 transitions. [2020-07-21 02:18:53,976 INFO L78 Accepts]: Start accepts. Automaton has 25147 states and 40886 transitions. Word has length 474 [2020-07-21 02:18:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:53,977 INFO L479 AbstractCegarLoop]: Abstraction has 25147 states and 40886 transitions. [2020-07-21 02:18:53,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:18:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 25147 states and 40886 transitions. [2020-07-21 02:18:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 02:18:53,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:54,000 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] [2020-07-21 02:18:54,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:54,213 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:54,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:54,214 INFO L82 PathProgramCache]: Analyzing trace with hash -319233921, now seen corresponding path program 1 times [2020-07-21 02:18:54,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:54,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394043876] [2020-07-21 02:18:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:54,550 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:54,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:54,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:18:54,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:54,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:54,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394043876] [2020-07-21 02:18:54,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:54,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:18:54,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881144914] [2020-07-21 02:18:54,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:18:54,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:54,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:18:54,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:18:54,669 INFO L87 Difference]: Start difference. First operand 25147 states and 40886 transitions. Second operand 4 states. [2020-07-21 02:18:56,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:18:56,064 INFO L93 Difference]: Finished difference Result 60526 states and 99033 transitions. [2020-07-21 02:18:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:18:56,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2020-07-21 02:18:56,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:18:56,114 INFO L225 Difference]: With dead ends: 60526 [2020-07-21 02:18:56,114 INFO L226 Difference]: Without dead ends: 31829 [2020-07-21 02:18:56,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:18:56,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31829 states. [2020-07-21 02:18:57,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31829 to 31793. [2020-07-21 02:18:57,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31793 states. [2020-07-21 02:18:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31793 states to 31793 states and 51879 transitions. [2020-07-21 02:18:57,299 INFO L78 Accepts]: Start accepts. Automaton has 31793 states and 51879 transitions. Word has length 474 [2020-07-21 02:18:57,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:18:57,299 INFO L479 AbstractCegarLoop]: Abstraction has 31793 states and 51879 transitions. [2020-07-21 02:18:57,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:18:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 31793 states and 51879 transitions. [2020-07-21 02:18:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 02:18:58,180 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:18:58,180 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] [2020-07-21 02:18:58,393 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:58,394 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:18:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:18:58,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1155897022, now seen corresponding path program 1 times [2020-07-21 02:18:58,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:18:58,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282598409] [2020-07-21 02:18:58,396 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:18:58,746 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:18:58,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:18:58,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:18:58,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:18:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:18:58,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:18:58,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282598409] [2020-07-21 02:18:58,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:18:58,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:18:58,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85861913] [2020-07-21 02:18:58,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:18:58,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:18:58,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:18:58,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:18:58,879 INFO L87 Difference]: Start difference. First operand 31793 states and 51879 transitions. Second operand 3 states. [2020-07-21 02:19:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:00,627 INFO L93 Difference]: Finished difference Result 88817 states and 144660 transitions. [2020-07-21 02:19:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:00,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 474 [2020-07-21 02:19:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:00,685 INFO L225 Difference]: With dead ends: 88817 [2020-07-21 02:19:00,685 INFO L226 Difference]: Without dead ends: 57288 [2020-07-21 02:19:00,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57288 states. [2020-07-21 02:19:01,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57288 to 31288. [2020-07-21 02:19:01,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31288 states. [2020-07-21 02:19:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31288 states to 31288 states and 51056 transitions. [2020-07-21 02:19:01,884 INFO L78 Accepts]: Start accepts. Automaton has 31288 states and 51056 transitions. Word has length 474 [2020-07-21 02:19:01,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:01,885 INFO L479 AbstractCegarLoop]: Abstraction has 31288 states and 51056 transitions. [2020-07-21 02:19:01,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:01,885 INFO L276 IsEmpty]: Start isEmpty. Operand 31288 states and 51056 transitions. [2020-07-21 02:19:01,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 02:19:01,912 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:01,913 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:02,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:02,120 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:02,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:02,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1370288306, now seen corresponding path program 1 times [2020-07-21 02:19:02,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:02,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055159628] [2020-07-21 02:19:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:02,533 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:02,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:02,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 2065 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:19:02,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:02,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:02,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055159628] [2020-07-21 02:19:02,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:02,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:19:02,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622328023] [2020-07-21 02:19:02,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:19:02,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:02,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:19:02,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:19:02,964 INFO L87 Difference]: Start difference. First operand 31288 states and 51056 transitions. Second operand 5 states. [2020-07-21 02:19:04,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:04,856 INFO L93 Difference]: Finished difference Result 43873 states and 70342 transitions. [2020-07-21 02:19:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:19:04,857 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2020-07-21 02:19:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:04,888 INFO L225 Difference]: With dead ends: 43873 [2020-07-21 02:19:04,888 INFO L226 Difference]: Without dead ends: 31288 [2020-07-21 02:19:04,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:19:04,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31288 states. [2020-07-21 02:19:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31288 to 31288. [2020-07-21 02:19:06,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31288 states. [2020-07-21 02:19:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31288 states to 31288 states and 50762 transitions. [2020-07-21 02:19:06,240 INFO L78 Accepts]: Start accepts. Automaton has 31288 states and 50762 transitions. Word has length 476 [2020-07-21 02:19:06,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:06,241 INFO L479 AbstractCegarLoop]: Abstraction has 31288 states and 50762 transitions. [2020-07-21 02:19:06,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:19:06,241 INFO L276 IsEmpty]: Start isEmpty. Operand 31288 states and 50762 transitions. [2020-07-21 02:19:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 02:19:06,266 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:06,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:06,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:06,467 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:06,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1426801997, now seen corresponding path program 1 times [2020-07-21 02:19:06,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:06,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752897682] [2020-07-21 02:19:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:06,880 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:06,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:06,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 2066 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:19:06,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:07,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:07,091 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:07,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752897682] [2020-07-21 02:19:07,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:07,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:07,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769708566] [2020-07-21 02:19:07,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:07,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:07,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:07,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:07,093 INFO L87 Difference]: Start difference. First operand 31288 states and 50762 transitions. Second operand 4 states. [2020-07-21 02:19:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:09,707 INFO L93 Difference]: Finished difference Result 89580 states and 145490 transitions. [2020-07-21 02:19:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:19:09,707 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2020-07-21 02:19:09,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:09,766 INFO L225 Difference]: With dead ends: 89580 [2020-07-21 02:19:09,766 INFO L226 Difference]: Without dead ends: 60363 [2020-07-21 02:19:09,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:19:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60363 states. [2020-07-21 02:19:13,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60363 to 60170. [2020-07-21 02:19:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60170 states. [2020-07-21 02:19:13,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60170 states to 60170 states and 97264 transitions. [2020-07-21 02:19:13,554 INFO L78 Accepts]: Start accepts. Automaton has 60170 states and 97264 transitions. Word has length 476 [2020-07-21 02:19:13,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:13,554 INFO L479 AbstractCegarLoop]: Abstraction has 60170 states and 97264 transitions. [2020-07-21 02:19:13,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:19:13,554 INFO L276 IsEmpty]: Start isEmpty. Operand 60170 states and 97264 transitions. [2020-07-21 02:19:13,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2020-07-21 02:19:13,603 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:13,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:13,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:13,804 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:13,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1519219969, now seen corresponding path program 1 times [2020-07-21 02:19:13,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:13,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373368955] [2020-07-21 02:19:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:14,207 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:19:14,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:14,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 2069 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:14,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:14,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:14,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373368955] [2020-07-21 02:19:14,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:14,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:14,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457811483] [2020-07-21 02:19:14,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:14,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:14,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:14,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:14,384 INFO L87 Difference]: Start difference. First operand 60170 states and 97264 transitions. Second operand 3 states. [2020-07-21 02:19:19,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:19,224 INFO L93 Difference]: Finished difference Result 174364 states and 281582 transitions. [2020-07-21 02:19:19,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:19:19,224 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 478 [2020-07-21 02:19:19,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:19,346 INFO L225 Difference]: With dead ends: 174364 [2020-07-21 02:19:19,346 INFO L226 Difference]: Without dead ends: 118531 [2020-07-21 02:19:19,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:19,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118531 states. [2020-07-21 02:19:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118531 to 118338. [2020-07-21 02:19:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118338 states. [2020-07-21 02:19:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118338 states to 118338 states and 190574 transitions. [2020-07-21 02:19:26,356 INFO L78 Accepts]: Start accepts. Automaton has 118338 states and 190574 transitions. Word has length 478 [2020-07-21 02:19:26,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:26,356 INFO L479 AbstractCegarLoop]: Abstraction has 118338 states and 190574 transitions. [2020-07-21 02:19:26,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:19:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 118338 states and 190574 transitions. [2020-07-21 02:19:26,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 02:19:26,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:26,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:26,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:26,651 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:26,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:26,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1940259418, now seen corresponding path program 1 times [2020-07-21 02:19:26,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:26,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711367328] [2020-07-21 02:19:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:26,983 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:26,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:26,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 1697 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:19:26,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:27,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:27,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711367328] [2020-07-21 02:19:27,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:27,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:19:27,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963953475] [2020-07-21 02:19:27,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:19:27,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:27,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:19:27,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:19:27,129 INFO L87 Difference]: Start difference. First operand 118338 states and 190574 transitions. Second operand 4 states. [2020-07-21 02:19:36,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:19:36,690 INFO L93 Difference]: Finished difference Result 292354 states and 473686 transitions. [2020-07-21 02:19:36,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:19:36,691 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2020-07-21 02:19:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:19:36,851 INFO L225 Difference]: With dead ends: 292354 [2020-07-21 02:19:36,851 INFO L226 Difference]: Without dead ends: 142745 [2020-07-21 02:19:36,950 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 [2020-07-21 02:19:37,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142745 states. [2020-07-21 02:19:45,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142745 to 142552. [2020-07-21 02:19:45,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142552 states. [2020-07-21 02:19:45,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142552 states to 142552 states and 229604 transitions. [2020-07-21 02:19:45,788 INFO L78 Accepts]: Start accepts. Automaton has 142552 states and 229604 transitions. Word has length 480 [2020-07-21 02:19:45,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:19:45,789 INFO L479 AbstractCegarLoop]: Abstraction has 142552 states and 229604 transitions. [2020-07-21 02:19:45,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:19:45,789 INFO L276 IsEmpty]: Start isEmpty. Operand 142552 states and 229604 transitions. [2020-07-21 02:19:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2020-07-21 02:19:46,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:19:46,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:19:46,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:46,411 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:19:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:19:46,412 INFO L82 PathProgramCache]: Analyzing trace with hash -792912361, now seen corresponding path program 1 times [2020-07-21 02:19:46,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:19:46,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114941535] [2020-07-21 02:19:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:19:46,771 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:19:46,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:19:46,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:19:46,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:19:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:19:46,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:19:46,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114941535] [2020-07-21 02:19:46,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:19:46,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:19:46,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398843735] [2020-07-21 02:19:46,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:19:46,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:19:46,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:19:46,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:19:46,867 INFO L87 Difference]: Start difference. First operand 142552 states and 229604 transitions. Second operand 3 states. [2020-07-21 02:20:01,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:01,577 INFO L93 Difference]: Finished difference Result 422006 states and 679426 transitions. [2020-07-21 02:20:01,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:01,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 480 [2020-07-21 02:20:01,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:01,890 INFO L225 Difference]: With dead ends: 422006 [2020-07-21 02:20:01,890 INFO L226 Difference]: Without dead ends: 282435 [2020-07-21 02:20:02,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:02,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282435 states. [2020-07-21 02:20:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282435 to 143934. [2020-07-21 02:20:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143934 states. [2020-07-21 02:20:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143934 states to 143934 states and 231338 transitions. [2020-07-21 02:20:10,333 INFO L78 Accepts]: Start accepts. Automaton has 143934 states and 231338 transitions. Word has length 480 [2020-07-21 02:20:10,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:10,334 INFO L479 AbstractCegarLoop]: Abstraction has 143934 states and 231338 transitions. [2020-07-21 02:20:10,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:10,334 INFO L276 IsEmpty]: Start isEmpty. Operand 143934 states and 231338 transitions. [2020-07-21 02:20:10,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2020-07-21 02:20:10,499 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:10,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:10,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:10,700 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:10,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:10,701 INFO L82 PathProgramCache]: Analyzing trace with hash -868934738, now seen corresponding path program 1 times [2020-07-21 02:20:10,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:10,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100160959] [2020-07-21 02:20:10,702 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:11,071 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:11,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:11,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:11,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:11,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:11,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100160959] [2020-07-21 02:20:11,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:11,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:11,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541439391] [2020-07-21 02:20:11,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:11,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:11,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:11,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:11,231 INFO L87 Difference]: Start difference. First operand 143934 states and 231338 transitions. Second operand 3 states. [2020-07-21 02:20:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:26,567 INFO L93 Difference]: Finished difference Result 405720 states and 651532 transitions. [2020-07-21 02:20:26,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:26,568 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 481 [2020-07-21 02:20:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:26,857 INFO L225 Difference]: With dead ends: 405720 [2020-07-21 02:20:26,858 INFO L226 Difference]: Without dead ends: 273003 [2020-07-21 02:20:26,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:27,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273003 states. [2020-07-21 02:20:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273003 to 145970. [2020-07-21 02:20:36,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145970 states. [2020-07-21 02:20:36,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145970 states to 145970 states and 234320 transitions. [2020-07-21 02:20:36,292 INFO L78 Accepts]: Start accepts. Automaton has 145970 states and 234320 transitions. Word has length 481 [2020-07-21 02:20:36,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:20:36,292 INFO L479 AbstractCegarLoop]: Abstraction has 145970 states and 234320 transitions. [2020-07-21 02:20:36,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:20:36,292 INFO L276 IsEmpty]: Start isEmpty. Operand 145970 states and 234320 transitions. [2020-07-21 02:20:36,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 02:20:36,419 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:20:36,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:20:36,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:36,620 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:20:36,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:20:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash -799474080, now seen corresponding path program 1 times [2020-07-21 02:20:36,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:20:36,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023818743] [2020-07-21 02:20:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:20:36,974 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:20:36,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:20:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:20:36,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:20:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:20:37,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:20:37,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023818743] [2020-07-21 02:20:37,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:20:37,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:20:37,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093083559] [2020-07-21 02:20:37,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:20:37,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:20:37,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:20:37,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:37,109 INFO L87 Difference]: Start difference. First operand 145970 states and 234320 transitions. Second operand 3 states. [2020-07-21 02:20:53,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:20:53,781 INFO L93 Difference]: Finished difference Result 413358 states and 663242 transitions. [2020-07-21 02:20:53,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:20:53,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 02:20:53,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:20:54,074 INFO L225 Difference]: With dead ends: 413358 [2020-07-21 02:20:54,075 INFO L226 Difference]: Without dead ends: 278833 [2020-07-21 02:20:54,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:20:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278833 states. [2020-07-21 02:21:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278833 to 148480. [2020-07-21 02:21:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148480 states. [2020-07-21 02:21:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148480 states to 148480 states and 237702 transitions. [2020-07-21 02:21:03,624 INFO L78 Accepts]: Start accepts. Automaton has 148480 states and 237702 transitions. Word has length 482 [2020-07-21 02:21:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:03,624 INFO L479 AbstractCegarLoop]: Abstraction has 148480 states and 237702 transitions. [2020-07-21 02:21:03,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:21:03,625 INFO L276 IsEmpty]: Start isEmpty. Operand 148480 states and 237702 transitions. [2020-07-21 02:21:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-07-21 02:21:03,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:03,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:03,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:03,974 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:03,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:03,975 INFO L82 PathProgramCache]: Analyzing trace with hash 678760434, now seen corresponding path program 1 times [2020-07-21 02:21:03,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:03,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223688569] [2020-07-21 02:21:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:04,327 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:21:04,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:04,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:21:04,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:21:04,427 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:04,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223688569] [2020-07-21 02:21:04,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:04,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:21:04,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200068732] [2020-07-21 02:21:04,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:21:04,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:04,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:21:04,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:04,429 INFO L87 Difference]: Start difference. First operand 148480 states and 237702 transitions. Second operand 3 states. [2020-07-21 02:21:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:21,177 INFO L93 Difference]: Finished difference Result 434252 states and 695588 transitions. [2020-07-21 02:21:21,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:21:21,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 482 [2020-07-21 02:21:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:21,494 INFO L225 Difference]: With dead ends: 434252 [2020-07-21 02:21:21,495 INFO L226 Difference]: Without dead ends: 289505 [2020-07-21 02:21:21,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289505 states. [2020-07-21 02:21:35,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289505 to 148510. [2020-07-21 02:21:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148510 states. [2020-07-21 02:21:36,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148510 states to 148510 states and 237422 transitions. [2020-07-21 02:21:36,467 INFO L78 Accepts]: Start accepts. Automaton has 148510 states and 237422 transitions. Word has length 482 [2020-07-21 02:21:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:21:36,467 INFO L479 AbstractCegarLoop]: Abstraction has 148510 states and 237422 transitions. [2020-07-21 02:21:36,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:21:36,468 INFO L276 IsEmpty]: Start isEmpty. Operand 148510 states and 237422 transitions. [2020-07-21 02:21:36,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 02:21:36,591 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:21:36,592 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:21:36,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:36,792 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:21:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:21:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash -680300873, now seen corresponding path program 1 times [2020-07-21 02:21:36,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:21:36,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608327885] [2020-07-21 02:21:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:21:37,146 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:21:37,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:21:37,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 1697 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:21:37,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:21:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:21:37,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:21:37,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608327885] [2020-07-21 02:21:37,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:21:37,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:21:37,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945786525] [2020-07-21 02:21:37,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:21:37,259 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:21:37,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:21:37,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:37,259 INFO L87 Difference]: Start difference. First operand 148510 states and 237422 transitions. Second operand 3 states. [2020-07-21 02:21:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:21:57,331 INFO L93 Difference]: Finished difference Result 429418 states and 687618 transitions. [2020-07-21 02:21:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:21:57,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 02:21:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:21:57,664 INFO L225 Difference]: With dead ends: 429418 [2020-07-21 02:21:57,664 INFO L226 Difference]: Without dead ends: 288547 [2020-07-21 02:21:57,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:21:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288547 states. [2020-07-21 02:22:07,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288547 to 150298. [2020-07-21 02:22:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150298 states. [2020-07-21 02:22:07,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150298 states to 150298 states and 240098 transitions. [2020-07-21 02:22:07,871 INFO L78 Accepts]: Start accepts. Automaton has 150298 states and 240098 transitions. Word has length 483 [2020-07-21 02:22:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:22:07,872 INFO L479 AbstractCegarLoop]: Abstraction has 150298 states and 240098 transitions. [2020-07-21 02:22:07,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:22:07,872 INFO L276 IsEmpty]: Start isEmpty. Operand 150298 states and 240098 transitions. [2020-07-21 02:22:08,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 02:22:08,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:22:08,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:22:08,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:08,210 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:22:08,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:22:08,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1662538246, now seen corresponding path program 1 times [2020-07-21 02:22:08,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:22:08,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646011236] [2020-07-21 02:22:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:08,561 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:22:08,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:22:08,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1687 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:22:08,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:22:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:22:08,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:22:08,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646011236] [2020-07-21 02:22:08,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:22:08,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:22:08,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819071152] [2020-07-21 02:22:08,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:22:08,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:22:08,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:22:08,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:22:08,697 INFO L87 Difference]: Start difference. First operand 150298 states and 240098 transitions. Second operand 3 states. [2020-07-21 02:22:29,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:22:29,301 INFO L93 Difference]: Finished difference Result 416578 states and 666760 transitions. [2020-07-21 02:22:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:22:29,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 483 [2020-07-21 02:22:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:22:29,779 INFO L225 Difference]: With dead ends: 416578 [2020-07-21 02:22:29,779 INFO L226 Difference]: Without dead ends: 283867 [2020-07-21 02:22:29,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:22:30,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283867 states. [2020-07-21 02:22:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283867 to 153794. [2020-07-21 02:22:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153794 states. [2020-07-21 02:22:41,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153794 states to 153794 states and 244488 transitions. [2020-07-21 02:22:41,063 INFO L78 Accepts]: Start accepts. Automaton has 153794 states and 244488 transitions. Word has length 483 [2020-07-21 02:22:41,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:22:41,063 INFO L479 AbstractCegarLoop]: Abstraction has 153794 states and 244488 transitions. [2020-07-21 02:22:41,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:22:41,064 INFO L276 IsEmpty]: Start isEmpty. Operand 153794 states and 244488 transitions. [2020-07-21 02:22:41,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-21 02:22:41,198 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:22:41,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:22:41,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:41,414 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:22:41,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:22:41,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1463081337, now seen corresponding path program 1 times [2020-07-21 02:22:41,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:22:41,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460256785] [2020-07-21 02:22:41,416 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:22:42,297 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:22:42,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:22:42,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 1688 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:22:42,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:22:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:22:42,402 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:22:42,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460256785] [2020-07-21 02:22:42,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:22:42,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:22:42,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629551343] [2020-07-21 02:22:42,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:22:42,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:22:42,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:22:42,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:22:42,404 INFO L87 Difference]: Start difference. First operand 153794 states and 244488 transitions. Second operand 4 states. [2020-07-21 02:23:04,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:04,698 INFO L93 Difference]: Finished difference Result 446611 states and 711070 transitions. [2020-07-21 02:23:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:23:04,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 483 [2020-07-21 02:23:04,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:05,033 INFO L225 Difference]: With dead ends: 446611 [2020-07-21 02:23:05,033 INFO L226 Difference]: Without dead ends: 300320 [2020-07-21 02:23:05,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:05,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300320 states. [2020-07-21 02:23:30,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300320 to 300277. [2020-07-21 02:23:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300277 states. [2020-07-21 02:23:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300277 states to 300277 states and 475813 transitions. [2020-07-21 02:23:30,716 INFO L78 Accepts]: Start accepts. Automaton has 300277 states and 475813 transitions. Word has length 483 [2020-07-21 02:23:30,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:30,716 INFO L479 AbstractCegarLoop]: Abstraction has 300277 states and 475813 transitions. [2020-07-21 02:23:30,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 300277 states and 475813 transitions. [2020-07-21 02:23:31,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 02:23:31,023 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:31,024 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:31,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:31,231 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:31,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:31,232 INFO L82 PathProgramCache]: Analyzing trace with hash 414890772, now seen corresponding path program 1 times [2020-07-21 02:23:31,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:31,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723095871] [2020-07-21 02:23:31,233 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:31,588 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:31,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:31,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:23:31,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:32,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:32,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723095871] [2020-07-21 02:23:32,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:32,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:32,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462331458] [2020-07-21 02:23:32,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:32,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:32,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:32,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:32,307 INFO L87 Difference]: Start difference. First operand 300277 states and 475813 transitions. Second operand 4 states. [2020-07-21 02:24:17,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:17,127 INFO L93 Difference]: Finished difference Result 826567 states and 1311161 transitions. [2020-07-21 02:24:17,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:17,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-21 02:24:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:17,993 INFO L225 Difference]: With dead ends: 826567 [2020-07-21 02:24:17,993 INFO L226 Difference]: Without dead ends: 581002 [2020-07-21 02:24:18,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581002 states. [2020-07-21 02:24:51,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581002 to 345285. [2020-07-21 02:24:51,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345285 states. [2020-07-21 02:24:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345285 states to 345285 states and 547087 transitions. [2020-07-21 02:24:51,978 INFO L78 Accepts]: Start accepts. Automaton has 345285 states and 547087 transitions. Word has length 486 [2020-07-21 02:24:51,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:51,979 INFO L479 AbstractCegarLoop]: Abstraction has 345285 states and 547087 transitions. [2020-07-21 02:24:51,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:51,979 INFO L276 IsEmpty]: Start isEmpty. Operand 345285 states and 547087 transitions. [2020-07-21 02:24:52,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 02:24:52,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:52,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:24:52,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:52,564 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:52,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:52,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1609483138, now seen corresponding path program 1 times [2020-07-21 02:24:52,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:52,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396626995] [2020-07-21 02:24:52,566 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:52,923 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:52,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:52,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1689 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:52,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:54,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:54,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396626995] [2020-07-21 02:24:54,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:54,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:54,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863693678] [2020-07-21 02:24:54,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:54,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:54,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:54,012 INFO L87 Difference]: Start difference. First operand 345285 states and 547087 transitions. Second operand 3 states. [2020-07-21 02:25:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:25:47,429 INFO L93 Difference]: Finished difference Result 1018394 states and 1614549 transitions. [2020-07-21 02:25:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:25:47,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 486 [2020-07-21 02:25:47,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:25:48,835 INFO L225 Difference]: With dead ends: 1018394 [2020-07-21 02:25:48,835 INFO L226 Difference]: Without dead ends: 687347 [2020-07-21 02:25:49,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:49,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687347 states. [2020-07-21 02:26:58,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687347 to 687323. [2020-07-21 02:26:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 687323 states. [2020-07-21 02:26:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687323 states to 687323 states and 1084401 transitions. [2020-07-21 02:26:59,431 INFO L78 Accepts]: Start accepts. Automaton has 687323 states and 1084401 transitions. Word has length 486 [2020-07-21 02:26:59,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:26:59,431 INFO L479 AbstractCegarLoop]: Abstraction has 687323 states and 1084401 transitions. [2020-07-21 02:26:59,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:26:59,431 INFO L276 IsEmpty]: Start isEmpty. Operand 687323 states and 1084401 transitions. [2020-07-21 02:27:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-21 02:27:01,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:01,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:01,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:01,888 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:01,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:01,889 INFO L82 PathProgramCache]: Analyzing trace with hash 514595675, now seen corresponding path program 1 times [2020-07-21 02:27:01,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:01,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576732824] [2020-07-21 02:27:01,892 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:02,246 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:27:02,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:02,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 1690 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:27:02,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:02,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:02,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576732824] [2020-07-21 02:27:02,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:02,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:27:02,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779177982] [2020-07-21 02:27:02,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:27:02,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:02,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:27:02,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:27:02,381 INFO L87 Difference]: Start difference. First operand 687323 states and 1084401 transitions. Second operand 4 states. [2020-07-21 02:29:02,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:29:02,967 INFO L93 Difference]: Finished difference Result 1860055 states and 2937764 transitions. [2020-07-21 02:29:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:29:02,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 486 [2020-07-21 02:29:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:06,124 INFO L225 Difference]: With dead ends: 1860055 [2020-07-21 02:29:06,125 INFO L226 Difference]: Without dead ends: 1356678 [2020-07-21 02:29:06,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:29:07,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1356678 states.