/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 18:35:42,108 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 18:35:42,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 18:35:42,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 18:35:42,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 18:35:42,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 18:35:42,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 18:35:42,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 18:35:42,132 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 18:35:42,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 18:35:42,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 18:35:42,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 18:35:42,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 18:35:42,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 18:35:42,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 18:35:42,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 18:35:42,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 18:35:42,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 18:35:42,145 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 18:35:42,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 18:35:42,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 18:35:42,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 18:35:42,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 18:35:42,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 18:35:42,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 18:35:42,164 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 18:35:42,164 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 18:35:42,165 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 18:35:42,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 18:35:42,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 18:35:42,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 18:35:42,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 18:35:42,168 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 18:35:42,169 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 18:35:42,170 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 18:35:42,170 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 18:35:42,171 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 18:35:42,171 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 18:35:42,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 18:35:42,172 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 18:35:42,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 18:35:42,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 18:35:42,188 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 18:35:42,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 18:35:42,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 18:35:42,190 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 18:35:42,190 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 18:35:42,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 18:35:42,190 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 18:35:42,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 18:35:42,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 18:35:42,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 18:35:42,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 18:35:42,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 18:35:42,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 18:35:42,192 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 18:35:42,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 18:35:42,192 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 18:35:42,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 18:35:42,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 18:35:42,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 18:35:42,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 18:35:42,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 18:35:42,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:35:42,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 18:35:42,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 18:35:42,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 18:35:42,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 18:35:42,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:42,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 18:35:42,195 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 18:35:42,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 18:35:42,469 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 18:35:42,490 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 18:35:42,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 18:35:42,497 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 18:35:42,498 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 18:35:42,498 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 18:35:42,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/566522409/8e6431a9d5d7475e8b61d0cc6579a5ef/FLAGdac23ec20 [2020-07-20 18:35:43,320 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 18:35:43,321 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 18:35:43,348 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/566522409/8e6431a9d5d7475e8b61d0cc6579a5ef/FLAGdac23ec20 [2020-07-20 18:35:43,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/566522409/8e6431a9d5d7475e8b61d0cc6579a5ef [2020-07-20 18:35:43,493 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 18:35:43,496 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 18:35:43,497 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 18:35:43,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 18:35:43,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 18:35:43,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:35:43" (1/1) ... [2020-07-20 18:35:43,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23276232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:43, skipping insertion in model container [2020-07-20 18:35:43,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:35:43" (1/1) ... [2020-07-20 18:35:43,513 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 18:35:43,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 18:35:45,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:35:45,245 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 18:35:46,424 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 18:35:46,449 INFO L208 MainTranslator]: Completed translation [2020-07-20 18:35:46,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:46 WrapperNode [2020-07-20 18:35:46,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 18:35:46,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 18:35:46,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 18:35:46,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 18:35:46,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:46" (1/1) ... [2020-07-20 18:35:46,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:46" (1/1) ... [2020-07-20 18:35:46,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:46" (1/1) ... [2020-07-20 18:35:46,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:46" (1/1) ... [2020-07-20 18:35:46,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:46" (1/1) ... [2020-07-20 18:35:46,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:46" (1/1) ... [2020-07-20 18:35:46,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:46" (1/1) ... [2020-07-20 18:35:46,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 18:35:46,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 18:35:46,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 18:35:46,683 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 18:35:46,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 18:35:46,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 18:35:46,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 18:35:46,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 18:35:46,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 18:35:46,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 18:35:46,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 18:35:46,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 18:35:46,772 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 18:35:46,773 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 18:35:46,773 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 18:35:46,774 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 18:35:46,774 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 18:35:46,774 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 18:35:46,774 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 18:35:46,774 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 18:35:46,775 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 18:35:46,776 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-07-20 18:35:46,776 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 18:35:46,776 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 18:35:46,776 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 18:35:46,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 18:35:46,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 18:35:51,024 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 18:35:51,024 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 18:35:51,039 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:35:51 BoogieIcfgContainer [2020-07-20 18:35:51,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 18:35:51,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 18:35:51,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 18:35:51,044 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 18:35:51,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:35:43" (1/3) ... [2020-07-20 18:35:51,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510787e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:35:51, skipping insertion in model container [2020-07-20 18:35:51,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:35:46" (2/3) ... [2020-07-20 18:35:51,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@510787e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:35:51, skipping insertion in model container [2020-07-20 18:35:51,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:35:51" (3/3) ... [2020-07-20 18:35:51,048 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-07-20 18:35:51,058 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 18:35:51,067 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 18:35:51,084 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 18:35:51,114 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 18:35:51,115 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 18:35:51,115 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 18:35:51,115 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 18:35:51,115 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 18:35:51,115 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 18:35:51,115 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 18:35:51,116 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 18:35:51,166 INFO L276 IsEmpty]: Start isEmpty. Operand 1431 states. [2020-07-20 18:35:51,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 18:35:51,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:51,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:35:51,221 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times [2020-07-20 18:35:51,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:51,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381069414] [2020-07-20 18:35:51,238 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:52,084 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:52,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:52,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 2883 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:35:52,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:35:52,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:52,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381069414] [2020-07-20 18:35:52,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:52,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:35:52,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953686721] [2020-07-20 18:35:52,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:35:52,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:52,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:35:52,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:35:52,558 INFO L87 Difference]: Start difference. First operand 1431 states. Second operand 4 states. [2020-07-20 18:35:52,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:52,929 INFO L93 Difference]: Finished difference Result 4237 states and 7634 transitions. [2020-07-20 18:35:52,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:35:52,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-07-20 18:35:52,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:52,966 INFO L225 Difference]: With dead ends: 4237 [2020-07-20 18:35:52,966 INFO L226 Difference]: Without dead ends: 2813 [2020-07-20 18:35:52,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:35:53,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2813 states. [2020-07-20 18:35:53,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2813 to 2811. [2020-07-20 18:35:53,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2811 states. [2020-07-20 18:35:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2811 states to 2811 states and 4637 transitions. [2020-07-20 18:35:53,235 INFO L78 Accepts]: Start accepts. Automaton has 2811 states and 4637 transitions. Word has length 487 [2020-07-20 18:35:53,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:53,239 INFO L479 AbstractCegarLoop]: Abstraction has 2811 states and 4637 transitions. [2020-07-20 18:35:53,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:35:53,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2811 states and 4637 transitions. [2020-07-20 18:35:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-20 18:35:53,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:53,255 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:35:53,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:53,469 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:53,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:53,471 INFO L82 PathProgramCache]: Analyzing trace with hash -603864616, now seen corresponding path program 1 times [2020-07-20 18:35:53,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:53,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518532083] [2020-07-20 18:35:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:54,057 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:54,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:54,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 2888 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:35:54,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:35:54,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:54,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518532083] [2020-07-20 18:35:54,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:54,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:35:54,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390903316] [2020-07-20 18:35:54,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:35:54,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:54,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:35:54,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:54,417 INFO L87 Difference]: Start difference. First operand 2811 states and 4637 transitions. Second operand 3 states. [2020-07-20 18:35:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:54,757 INFO L93 Difference]: Finished difference Result 8124 states and 13359 transitions. [2020-07-20 18:35:54,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:35:54,757 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 489 [2020-07-20 18:35:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:54,791 INFO L225 Difference]: With dead ends: 8124 [2020-07-20 18:35:54,791 INFO L226 Difference]: Without dead ends: 5542 [2020-07-20 18:35:54,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:54,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2020-07-20 18:35:54,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 5540. [2020-07-20 18:35:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5540 states. [2020-07-20 18:35:55,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5540 states to 5540 states and 9108 transitions. [2020-07-20 18:35:55,014 INFO L78 Accepts]: Start accepts. Automaton has 5540 states and 9108 transitions. Word has length 489 [2020-07-20 18:35:55,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:55,015 INFO L479 AbstractCegarLoop]: Abstraction has 5540 states and 9108 transitions. [2020-07-20 18:35:55,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:35:55,016 INFO L276 IsEmpty]: Start isEmpty. Operand 5540 states and 9108 transitions. [2020-07-20 18:35:55,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-20 18:35:55,036 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:55,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:35:55,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:55,253 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:55,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:55,254 INFO L82 PathProgramCache]: Analyzing trace with hash -522806972, now seen corresponding path program 1 times [2020-07-20 18:35:55,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:55,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374176660] [2020-07-20 18:35:55,255 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:55,882 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:55,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:55,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 2888 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:35:55,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:35:56,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:56,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374176660] [2020-07-20 18:35:56,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:56,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:35:56,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208018435] [2020-07-20 18:35:56,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:35:56,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:56,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:35:56,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:56,020 INFO L87 Difference]: Start difference. First operand 5540 states and 9108 transitions. Second operand 3 states. [2020-07-20 18:35:56,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:56,364 INFO L93 Difference]: Finished difference Result 16364 states and 26861 transitions. [2020-07-20 18:35:56,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:35:56,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 490 [2020-07-20 18:35:56,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:56,421 INFO L225 Difference]: With dead ends: 16364 [2020-07-20 18:35:56,422 INFO L226 Difference]: Without dead ends: 10855 [2020-07-20 18:35:56,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:56,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2020-07-20 18:35:56,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 5566. [2020-07-20 18:35:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5566 states. [2020-07-20 18:35:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5566 states to 5566 states and 9146 transitions. [2020-07-20 18:35:56,808 INFO L78 Accepts]: Start accepts. Automaton has 5566 states and 9146 transitions. Word has length 490 [2020-07-20 18:35:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:56,808 INFO L479 AbstractCegarLoop]: Abstraction has 5566 states and 9146 transitions. [2020-07-20 18:35:56,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:35:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 5566 states and 9146 transitions. [2020-07-20 18:35:56,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-20 18:35:56,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:56,822 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:35:57,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:57,036 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:57,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:57,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1278928061, now seen corresponding path program 1 times [2020-07-20 18:35:57,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:57,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556337530] [2020-07-20 18:35:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:57,611 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:35:57,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:57,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:35:57,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:35:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:35:57,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:35:57,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556337530] [2020-07-20 18:35:57,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:35:57,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:35:57,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331799909] [2020-07-20 18:35:57,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:35:57,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:35:57,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:35:57,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:57,883 INFO L87 Difference]: Start difference. First operand 5566 states and 9146 transitions. Second operand 3 states. [2020-07-20 18:35:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:35:58,288 INFO L93 Difference]: Finished difference Result 16190 states and 26546 transitions. [2020-07-20 18:35:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:35:58,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-20 18:35:58,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:35:58,344 INFO L225 Difference]: With dead ends: 16190 [2020-07-20 18:35:58,345 INFO L226 Difference]: Without dead ends: 10936 [2020-07-20 18:35:58,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:35:58,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10936 states. [2020-07-20 18:35:58,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10936 to 10934. [2020-07-20 18:35:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10934 states. [2020-07-20 18:35:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10934 states to 10934 states and 17897 transitions. [2020-07-20 18:35:58,800 INFO L78 Accepts]: Start accepts. Automaton has 10934 states and 17897 transitions. Word has length 491 [2020-07-20 18:35:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:35:58,801 INFO L479 AbstractCegarLoop]: Abstraction has 10934 states and 17897 transitions. [2020-07-20 18:35:58,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:35:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 10934 states and 17897 transitions. [2020-07-20 18:35:58,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-20 18:35:58,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:35:58,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:35:59,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:59,046 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:35:59,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:35:59,047 INFO L82 PathProgramCache]: Analyzing trace with hash 510537176, now seen corresponding path program 1 times [2020-07-20 18:35:59,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:35:59,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908860737] [2020-07-20 18:35:59,048 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:35:59,403 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:35:59,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:35:59,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:35:59,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:00,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:00,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908860737] [2020-07-20 18:36:00,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:00,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:00,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529065305] [2020-07-20 18:36:00,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:00,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:00,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:00,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:00,089 INFO L87 Difference]: Start difference. First operand 10934 states and 17897 transitions. Second operand 3 states. [2020-07-20 18:36:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:00,704 INFO L93 Difference]: Finished difference Result 32666 states and 53459 transitions. [2020-07-20 18:36:00,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:00,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 491 [2020-07-20 18:36:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:00,758 INFO L225 Difference]: With dead ends: 32666 [2020-07-20 18:36:00,759 INFO L226 Difference]: Without dead ends: 21796 [2020-07-20 18:36:00,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:00,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21796 states. [2020-07-20 18:36:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21796 to 11010. [2020-07-20 18:36:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11010 states. [2020-07-20 18:36:01,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11010 states to 11010 states and 18003 transitions. [2020-07-20 18:36:01,332 INFO L78 Accepts]: Start accepts. Automaton has 11010 states and 18003 transitions. Word has length 491 [2020-07-20 18:36:01,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:01,333 INFO L479 AbstractCegarLoop]: Abstraction has 11010 states and 18003 transitions. [2020-07-20 18:36:01,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:01,333 INFO L276 IsEmpty]: Start isEmpty. Operand 11010 states and 18003 transitions. [2020-07-20 18:36:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 18:36:01,357 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:01,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:01,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:01,572 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:01,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1843762688, now seen corresponding path program 1 times [2020-07-20 18:36:01,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:01,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797450297] [2020-07-20 18:36:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:01,949 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:36:01,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:01,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 18:36:01,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:02,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:02,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797450297] [2020-07-20 18:36:02,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:02,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:36:02,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670135397] [2020-07-20 18:36:02,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:36:02,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:02,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:36:02,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:36:02,079 INFO L87 Difference]: Start difference. First operand 11010 states and 18003 transitions. Second operand 4 states. [2020-07-20 18:36:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:02,587 INFO L93 Difference]: Finished difference Result 31242 states and 50802 transitions. [2020-07-20 18:36:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:36:02,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 492 [2020-07-20 18:36:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:02,648 INFO L225 Difference]: With dead ends: 31242 [2020-07-20 18:36:02,648 INFO L226 Difference]: Without dead ends: 21472 [2020-07-20 18:36:02,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:36:02,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21472 states. [2020-07-20 18:36:03,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21472 to 11918. [2020-07-20 18:36:03,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11918 states. [2020-07-20 18:36:03,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11918 states to 11918 states and 19632 transitions. [2020-07-20 18:36:03,412 INFO L78 Accepts]: Start accepts. Automaton has 11918 states and 19632 transitions. Word has length 492 [2020-07-20 18:36:03,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:03,413 INFO L479 AbstractCegarLoop]: Abstraction has 11918 states and 19632 transitions. [2020-07-20 18:36:03,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:36:03,413 INFO L276 IsEmpty]: Start isEmpty. Operand 11918 states and 19632 transitions. [2020-07-20 18:36:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 18:36:03,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:03,446 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:03,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:03,661 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:03,661 INFO L82 PathProgramCache]: Analyzing trace with hash 83179837, now seen corresponding path program 1 times [2020-07-20 18:36:03,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:03,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808266537] [2020-07-20 18:36:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:04,206 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:04,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:04,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 2887 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:04,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:04,318 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:04,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808266537] [2020-07-20 18:36:04,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:04,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:04,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066497264] [2020-07-20 18:36:04,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:04,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:04,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:04,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:04,320 INFO L87 Difference]: Start difference. First operand 11918 states and 19632 transitions. Second operand 3 states. [2020-07-20 18:36:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:04,951 INFO L93 Difference]: Finished difference Result 35505 states and 58497 transitions. [2020-07-20 18:36:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:04,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 492 [2020-07-20 18:36:04,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:05,013 INFO L225 Difference]: With dead ends: 35505 [2020-07-20 18:36:05,014 INFO L226 Difference]: Without dead ends: 23667 [2020-07-20 18:36:05,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:05,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23667 states. [2020-07-20 18:36:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23667 to 12025. [2020-07-20 18:36:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12025 states. [2020-07-20 18:36:05,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12025 states to 12025 states and 19779 transitions. [2020-07-20 18:36:05,630 INFO L78 Accepts]: Start accepts. Automaton has 12025 states and 19779 transitions. Word has length 492 [2020-07-20 18:36:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:05,630 INFO L479 AbstractCegarLoop]: Abstraction has 12025 states and 19779 transitions. [2020-07-20 18:36:05,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 12025 states and 19779 transitions. [2020-07-20 18:36:05,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 18:36:05,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:05,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:05,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:05,867 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:05,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:05,868 INFO L82 PathProgramCache]: Analyzing trace with hash 237122314, now seen corresponding path program 1 times [2020-07-20 18:36:05,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:05,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77468851] [2020-07-20 18:36:05,870 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:06,247 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:36:06,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:06,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 18:36:06,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:06,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:06,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77468851] [2020-07-20 18:36:06,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:06,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 18:36:06,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993102072] [2020-07-20 18:36:06,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 18:36:06,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:06,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 18:36:06,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 18:36:06,493 INFO L87 Difference]: Start difference. First operand 12025 states and 19779 transitions. Second operand 9 states. [2020-07-20 18:36:16,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:16,639 INFO L93 Difference]: Finished difference Result 67749 states and 109478 transitions. [2020-07-20 18:36:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 18:36:16,640 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 493 [2020-07-20 18:36:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:16,821 INFO L225 Difference]: With dead ends: 67749 [2020-07-20 18:36:16,821 INFO L226 Difference]: Without dead ends: 65879 [2020-07-20 18:36:16,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 18:36:16,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65879 states. [2020-07-20 18:36:18,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65879 to 24699. [2020-07-20 18:36:18,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24699 states. [2020-07-20 18:36:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24699 states to 24699 states and 40001 transitions. [2020-07-20 18:36:18,118 INFO L78 Accepts]: Start accepts. Automaton has 24699 states and 40001 transitions. Word has length 493 [2020-07-20 18:36:18,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:18,118 INFO L479 AbstractCegarLoop]: Abstraction has 24699 states and 40001 transitions. [2020-07-20 18:36:18,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 18:36:18,118 INFO L276 IsEmpty]: Start isEmpty. Operand 24699 states and 40001 transitions. [2020-07-20 18:36:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 18:36:18,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:18,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:18,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:18,361 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:18,362 INFO L82 PathProgramCache]: Analyzing trace with hash 720769662, now seen corresponding path program 1 times [2020-07-20 18:36:18,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:18,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209005263] [2020-07-20 18:36:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:18,897 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:18,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:18,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 2900 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:18,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:19,053 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:19,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209005263] [2020-07-20 18:36:19,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:19,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:19,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126093107] [2020-07-20 18:36:19,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:19,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:19,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:19,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:19,059 INFO L87 Difference]: Start difference. First operand 24699 states and 40001 transitions. Second operand 3 states. [2020-07-20 18:36:20,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:20,837 INFO L93 Difference]: Finished difference Result 53859 states and 86607 transitions. [2020-07-20 18:36:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:20,839 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2020-07-20 18:36:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:20,882 INFO L225 Difference]: With dead ends: 53859 [2020-07-20 18:36:20,883 INFO L226 Difference]: Without dead ends: 34559 [2020-07-20 18:36:20,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:20,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34559 states. [2020-07-20 18:36:22,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34559 to 29087. [2020-07-20 18:36:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29087 states. [2020-07-20 18:36:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29087 states to 29087 states and 47273 transitions. [2020-07-20 18:36:22,127 INFO L78 Accepts]: Start accepts. Automaton has 29087 states and 47273 transitions. Word has length 493 [2020-07-20 18:36:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:22,127 INFO L479 AbstractCegarLoop]: Abstraction has 29087 states and 47273 transitions. [2020-07-20 18:36:22,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 29087 states and 47273 transitions. [2020-07-20 18:36:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-07-20 18:36:22,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:22,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:22,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:22,357 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:22,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:22,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2136396926, now seen corresponding path program 1 times [2020-07-20 18:36:22,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:22,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903043177] [2020-07-20 18:36:22,360 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:23,048 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:36:23,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:23,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 2892 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:36:23,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:23,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:23,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903043177] [2020-07-20 18:36:23,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:23,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:36:23,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065497867] [2020-07-20 18:36:23,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:36:23,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:23,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:36:23,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:23,278 INFO L87 Difference]: Start difference. First operand 29087 states and 47273 transitions. Second operand 3 states. [2020-07-20 18:36:26,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:26,155 INFO L93 Difference]: Finished difference Result 84066 states and 136285 transitions. [2020-07-20 18:36:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:36:26,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 493 [2020-07-20 18:36:26,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:26,230 INFO L225 Difference]: With dead ends: 84066 [2020-07-20 18:36:26,230 INFO L226 Difference]: Without dead ends: 56512 [2020-07-20 18:36:26,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:36:26,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56512 states. [2020-07-20 18:36:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56512 to 56510. [2020-07-20 18:36:28,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56510 states. [2020-07-20 18:36:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56510 states to 56510 states and 91436 transitions. [2020-07-20 18:36:28,609 INFO L78 Accepts]: Start accepts. Automaton has 56510 states and 91436 transitions. Word has length 493 [2020-07-20 18:36:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:36:28,609 INFO L479 AbstractCegarLoop]: Abstraction has 56510 states and 91436 transitions. [2020-07-20 18:36:28,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:36:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 56510 states and 91436 transitions. [2020-07-20 18:36:28,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-20 18:36:28,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:36:28,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:36:28,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:28,861 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:36:28,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:36:28,862 INFO L82 PathProgramCache]: Analyzing trace with hash 365059678, now seen corresponding path program 1 times [2020-07-20 18:36:28,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:36:28,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368608288] [2020-07-20 18:36:28,863 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:36:29,204 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:36:29,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:36:29,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 1458 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 18:36:29,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:36:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:36:29,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:36:29,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368608288] [2020-07-20 18:36:29,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:36:29,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 18:36:29,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106189151] [2020-07-20 18:36:29,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 18:36:29,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:36:29,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 18:36:29,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 18:36:29,400 INFO L87 Difference]: Start difference. First operand 56510 states and 91436 transitions. Second operand 9 states. [2020-07-20 18:36:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:36:53,936 INFO L93 Difference]: Finished difference Result 338271 states and 549641 transitions. [2020-07-20 18:36:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 18:36:53,936 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 495 [2020-07-20 18:36:53,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:36:54,323 INFO L225 Difference]: With dead ends: 338271 [2020-07-20 18:36:54,323 INFO L226 Difference]: Without dead ends: 321213 [2020-07-20 18:36:54,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 18:36:54,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321213 states. [2020-07-20 18:37:01,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321213 to 117458. [2020-07-20 18:37:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117458 states. [2020-07-20 18:37:01,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117458 states to 117458 states and 189500 transitions. [2020-07-20 18:37:01,283 INFO L78 Accepts]: Start accepts. Automaton has 117458 states and 189500 transitions. Word has length 495 [2020-07-20 18:37:01,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:37:01,283 INFO L479 AbstractCegarLoop]: Abstraction has 117458 states and 189500 transitions. [2020-07-20 18:37:01,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 18:37:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 117458 states and 189500 transitions. [2020-07-20 18:37:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-20 18:37:01,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:37:01,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:37:01,559 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:37:01,560 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:37:01,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:37:01,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1128237631, now seen corresponding path program 1 times [2020-07-20 18:37:01,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:37:01,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256445621] [2020-07-20 18:37:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:37:03,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:37:03,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:37:03,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:37:03,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:37:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:37:04,128 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:37:04,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256445621] [2020-07-20 18:37:04,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:37:04,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:37:04,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017538825] [2020-07-20 18:37:04,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:37:04,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:37:04,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:37:04,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:37:04,131 INFO L87 Difference]: Start difference. First operand 117458 states and 189500 transitions. Second operand 3 states. [2020-07-20 18:37:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:37:12,888 INFO L93 Difference]: Finished difference Result 283918 states and 458686 transitions. [2020-07-20 18:37:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:37:12,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 495 [2020-07-20 18:37:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:37:13,105 INFO L225 Difference]: With dead ends: 283918 [2020-07-20 18:37:13,105 INFO L226 Difference]: Without dead ends: 176684 [2020-07-20 18:37:13,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:37:13,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176684 states. [2020-07-20 18:37:24,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176684 to 152946. [2020-07-20 18:37:24,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152946 states. [2020-07-20 18:37:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152946 states to 152946 states and 247200 transitions. [2020-07-20 18:37:24,569 INFO L78 Accepts]: Start accepts. Automaton has 152946 states and 247200 transitions. Word has length 495 [2020-07-20 18:37:24,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:37:24,570 INFO L479 AbstractCegarLoop]: Abstraction has 152946 states and 247200 transitions. [2020-07-20 18:37:24,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:37:24,570 INFO L276 IsEmpty]: Start isEmpty. Operand 152946 states and 247200 transitions. [2020-07-20 18:37:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 18:37:24,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:37:24,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:37:24,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:37:24,831 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:37:24,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:37:24,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1424710819, now seen corresponding path program 1 times [2020-07-20 18:37:24,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:37:24,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579384694] [2020-07-20 18:37:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:37:25,230 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 18:37:25,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:37:25,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 18:37:25,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:37:26,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:37:26,064 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:37:26,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579384694] [2020-07-20 18:37:26,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:37:26,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-20 18:37:26,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348825151] [2020-07-20 18:37:26,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 18:37:26,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:37:26,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 18:37:26,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-07-20 18:37:26,067 INFO L87 Difference]: Start difference. First operand 152946 states and 247200 transitions. Second operand 12 states. [2020-07-20 18:38:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:38:31,187 INFO L93 Difference]: Finished difference Result 783172 states and 1270417 transitions. [2020-07-20 18:38:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-20 18:38:31,187 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 496 [2020-07-20 18:38:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:38:32,183 INFO L225 Difference]: With dead ends: 783172 [2020-07-20 18:38:32,184 INFO L226 Difference]: Without dead ends: 687958 [2020-07-20 18:38:32,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=552, Invalid=1704, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 18:38:32,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687958 states. [2020-07-20 18:38:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687958 to 141406. [2020-07-20 18:38:45,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141406 states. [2020-07-20 18:38:46,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141406 states to 141406 states and 227896 transitions. [2020-07-20 18:38:46,150 INFO L78 Accepts]: Start accepts. Automaton has 141406 states and 227896 transitions. Word has length 496 [2020-07-20 18:38:46,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:38:46,151 INFO L479 AbstractCegarLoop]: Abstraction has 141406 states and 227896 transitions. [2020-07-20 18:38:46,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 18:38:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 141406 states and 227896 transitions. [2020-07-20 18:38:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 18:38:46,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:38:46,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:38:46,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:38:46,404 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:38:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:38:46,405 INFO L82 PathProgramCache]: Analyzing trace with hash -941063471, now seen corresponding path program 1 times [2020-07-20 18:38:46,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:38:46,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642548944] [2020-07-20 18:38:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:38:46,946 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:38:46,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:38:46,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 2899 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:38:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:38:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:38:47,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:38:47,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642548944] [2020-07-20 18:38:47,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:38:47,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 18:38:47,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213285010] [2020-07-20 18:38:47,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 18:38:47,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:38:47,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 18:38:47,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:38:47,381 INFO L87 Difference]: Start difference. First operand 141406 states and 227896 transitions. Second operand 5 states. [2020-07-20 18:39:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:39:14,264 INFO L93 Difference]: Finished difference Result 360114 states and 582618 transitions. [2020-07-20 18:39:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 18:39:14,264 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2020-07-20 18:39:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:39:14,661 INFO L225 Difference]: With dead ends: 360114 [2020-07-20 18:39:14,661 INFO L226 Difference]: Without dead ends: 271024 [2020-07-20 18:39:14,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 492 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-20 18:39:14,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271024 states. [2020-07-20 18:39:41,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271024 to 271022. [2020-07-20 18:39:41,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271022 states. [2020-07-20 18:39:41,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271022 states to 271022 states and 435724 transitions. [2020-07-20 18:39:41,538 INFO L78 Accepts]: Start accepts. Automaton has 271022 states and 435724 transitions. Word has length 496 [2020-07-20 18:39:41,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:39:41,539 INFO L479 AbstractCegarLoop]: Abstraction has 271022 states and 435724 transitions. [2020-07-20 18:39:41,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 18:39:41,539 INFO L276 IsEmpty]: Start isEmpty. Operand 271022 states and 435724 transitions. [2020-07-20 18:39:41,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 18:39:41,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:39:41,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:39:41,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:39:41,843 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:39:41,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:39:41,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1788849025, now seen corresponding path program 1 times [2020-07-20 18:39:41,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:39:41,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199657740] [2020-07-20 18:39:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:39:42,186 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:39:42,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:39:42,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1452 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 18:39:42,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:39:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:39:43,046 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:39:43,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199657740] [2020-07-20 18:39:43,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:39:43,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:39:43,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463021364] [2020-07-20 18:39:43,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:39:43,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:39:43,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:39:43,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:39:43,048 INFO L87 Difference]: Start difference. First operand 271022 states and 435724 transitions. Second operand 3 states. [2020-07-20 18:40:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:40:26,292 INFO L93 Difference]: Finished difference Result 614594 states and 1002034 transitions. [2020-07-20 18:40:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:40:26,292 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 496 [2020-07-20 18:40:26,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:40:26,899 INFO L225 Difference]: With dead ends: 614594 [2020-07-20 18:40:26,899 INFO L226 Difference]: Without dead ends: 444720 [2020-07-20 18:40:27,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:40:27,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444720 states. [2020-07-20 18:41:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444720 to 444718. [2020-07-20 18:41:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444718 states. [2020-07-20 18:41:20,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444718 states to 444718 states and 719364 transitions. [2020-07-20 18:41:20,776 INFO L78 Accepts]: Start accepts. Automaton has 444718 states and 719364 transitions. Word has length 496 [2020-07-20 18:41:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:41:20,777 INFO L479 AbstractCegarLoop]: Abstraction has 444718 states and 719364 transitions. [2020-07-20 18:41:20,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:41:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 444718 states and 719364 transitions. [2020-07-20 18:41:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 18:41:20,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:41:20,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:41:21,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:41:21,069 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:41:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:41:21,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1578667646, now seen corresponding path program 1 times [2020-07-20 18:41:21,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:41:21,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461600156] [2020-07-20 18:41:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:41:21,622 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:41:21,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:41:21,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 2904 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 18:41:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:41:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:41:22,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:41:22,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461600156] [2020-07-20 18:41:22,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:41:22,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-20 18:41:22,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335911492] [2020-07-20 18:41:22,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 18:41:22,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:41:22,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 18:41:22,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-20 18:41:22,086 INFO L87 Difference]: Start difference. First operand 444718 states and 719364 transitions. Second operand 8 states. [2020-07-20 18:42:25,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:42:25,329 INFO L93 Difference]: Finished difference Result 745643 states and 1208847 transitions. [2020-07-20 18:42:25,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 18:42:25,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 496 [2020-07-20 18:42:25,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:42:26,078 INFO L225 Difference]: With dead ends: 745643 [2020-07-20 18:42:26,078 INFO L226 Difference]: Without dead ends: 504965 [2020-07-20 18:42:26,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-20 18:42:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504965 states. [2020-07-20 18:43:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504965 to 210810. [2020-07-20 18:43:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210810 states. [2020-07-20 18:43:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210810 states to 210810 states and 336868 transitions. [2020-07-20 18:43:01,789 INFO L78 Accepts]: Start accepts. Automaton has 210810 states and 336868 transitions. Word has length 496 [2020-07-20 18:43:01,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:43:01,790 INFO L479 AbstractCegarLoop]: Abstraction has 210810 states and 336868 transitions. [2020-07-20 18:43:01,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 18:43:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 210810 states and 336868 transitions. [2020-07-20 18:43:01,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2020-07-20 18:43:01,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:43:01,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:43:02,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:43:02,039 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:43:02,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:43:02,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1095020298, now seen corresponding path program 1 times [2020-07-20 18:43:02,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:43:02,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558704093] [2020-07-20 18:43:02,041 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:43:02,600 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 18:43:02,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:43:02,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 2900 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 18:43:02,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:43:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:43:03,730 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:43:03,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558704093] [2020-07-20 18:43:03,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:43:03,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 18:43:03,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222537026] [2020-07-20 18:43:03,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 18:43:03,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:43:03,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 18:43:03,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 18:43:03,732 INFO L87 Difference]: Start difference. First operand 210810 states and 336868 transitions. Second operand 4 states. [2020-07-20 18:43:51,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:43:51,228 INFO L93 Difference]: Finished difference Result 626148 states and 1000326 transitions. [2020-07-20 18:43:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 18:43:51,229 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2020-07-20 18:43:51,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:43:51,819 INFO L225 Difference]: With dead ends: 626148 [2020-07-20 18:43:51,819 INFO L226 Difference]: Without dead ends: 416420 [2020-07-20 18:43:52,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 18:43:52,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416420 states. [2020-07-20 18:44:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416420 to 416418. [2020-07-20 18:44:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416418 states. [2020-07-20 18:44:47,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416418 states to 416418 states and 663390 transitions. [2020-07-20 18:44:47,574 INFO L78 Accepts]: Start accepts. Automaton has 416418 states and 663390 transitions. Word has length 496 [2020-07-20 18:44:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:44:47,574 INFO L479 AbstractCegarLoop]: Abstraction has 416418 states and 663390 transitions. [2020-07-20 18:44:47,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 18:44:47,575 INFO L276 IsEmpty]: Start isEmpty. Operand 416418 states and 663390 transitions. [2020-07-20 18:44:47,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 18:44:47,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:44:47,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:44:47,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:44:47,883 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:44:47,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:44:47,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1637725500, now seen corresponding path program 1 times [2020-07-20 18:44:47,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:44:47,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099109379] [2020-07-20 18:44:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:44:48,233 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 18:44:48,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 18:44:48,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 18:44:48,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 18:44:48,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 18:44:48,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 18:44:48,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099109379] [2020-07-20 18:44:48,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 18:44:48,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 18:44:48,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245205186] [2020-07-20 18:44:48,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 18:44:48,993 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 18:44:48,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 18:44:48,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:44:48,994 INFO L87 Difference]: Start difference. First operand 416418 states and 663390 transitions. Second operand 3 states. [2020-07-20 18:46:35,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 18:46:35,897 INFO L93 Difference]: Finished difference Result 1236881 states and 1967854 transitions. [2020-07-20 18:46:35,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 18:46:35,898 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 498 [2020-07-20 18:46:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 18:46:37,146 INFO L225 Difference]: With dead ends: 1236881 [2020-07-20 18:46:37,146 INFO L226 Difference]: Without dead ends: 826664 [2020-07-20 18:46:37,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 18:46:38,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826664 states. [2020-07-20 18:47:41,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826664 to 417362. [2020-07-20 18:47:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417362 states. [2020-07-20 18:47:42,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417362 states to 417362 states and 664785 transitions. [2020-07-20 18:47:42,562 INFO L78 Accepts]: Start accepts. Automaton has 417362 states and 664785 transitions. Word has length 498 [2020-07-20 18:47:42,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 18:47:42,562 INFO L479 AbstractCegarLoop]: Abstraction has 417362 states and 664785 transitions. [2020-07-20 18:47:42,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 18:47:42,562 INFO L276 IsEmpty]: Start isEmpty. Operand 417362 states and 664785 transitions. [2020-07-20 18:47:42,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 18:47:42,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 18:47:42,664 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 18:47:42,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 18:47:42,877 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 18:47:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 18:47:42,878 INFO L82 PathProgramCache]: Analyzing trace with hash 2059542358, now seen corresponding path program 1 times [2020-07-20 18:47:42,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 18:47:42,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954132814] [2020-07-20 18:47:42,879 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