/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_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:46:26,102 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:46:26,104 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:46:26,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:46:26,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:46:26,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:46:26,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:46:26,123 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:46:26,125 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:46:26,126 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:46:26,127 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:46:26,128 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:46:26,128 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:46:26,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:46:26,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:46:26,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:46:26,132 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:46:26,133 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:46:26,135 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:46:26,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:46:26,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:46:26,139 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:46:26,140 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:46:26,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:46:26,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 14:46:26,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 14:46:26,148 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 14:46:26,148 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 14:46:26,149 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 14:46:26,150 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 14:46:26,150 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 14:46:26,151 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 14:46:26,151 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 14:46:26,152 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:46:26,152 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:46:26,153 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:46:26,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 14:46:26,180 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:46:26,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:46:26,183 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:46:26,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:46:26,183 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:46:26,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:46:26,184 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:46:26,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:46:26,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:46:26,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:46:26,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:46:26,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:46:26,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:46:26,185 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:46:26,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:46:26,186 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:46:26,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:46:26,187 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:46:26,187 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:46:26,187 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:46:26,187 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:46:26,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:46:26,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:46:26,188 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:46:26,188 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:46:26,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:46:26,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:26,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:46:26,189 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:46:26,189 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_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 14:46:26,467 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:46:26,481 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:46:26,484 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:46:26,486 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:46:26,486 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:46:26,487 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 14:46:26,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ab1b953c/63317992922a42cf9f9c4e8cdfc1f1c7/FLAG5d396fcaa [2020-07-21 14:46:27,289 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:46:27,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 14:46:27,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ab1b953c/63317992922a42cf9f9c4e8cdfc1f1c7/FLAG5d396fcaa [2020-07-21 14:46:27,475 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ab1b953c/63317992922a42cf9f9c4e8cdfc1f1c7 [2020-07-21 14:46:27,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:46:27,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:46:27,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:46:27,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:46:27,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:46:27,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:46:27" (1/1) ... [2020-07-21 14:46:27,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30732442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:27, skipping insertion in model container [2020-07-21 14:46:27,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:46:27" (1/1) ... [2020-07-21 14:46:27,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:46:27,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:46:28,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:46:28,754 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:46:29,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:46:29,494 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:46:29,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:29 WrapperNode [2020-07-21 14:46:29,495 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:46:29,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:46:29,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:46:29,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:46:29,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:29" (1/1) ... [2020-07-21 14:46:29,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:29" (1/1) ... [2020-07-21 14:46:29,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:29" (1/1) ... [2020-07-21 14:46:29,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:29" (1/1) ... [2020-07-21 14:46:29,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:29" (1/1) ... [2020-07-21 14:46:29,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:29" (1/1) ... [2020-07-21 14:46:29,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:29" (1/1) ... [2020-07-21 14:46:29,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:46:29,690 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:46:29,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:46:29,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:46:29,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:46:29,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:46:29,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:46:29,771 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:46:29,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:46:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:46:29,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 14:46:29,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 14:46:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 14:46:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 14:46:29,774 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:46:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:46:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 14:46:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 14:46:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 14:46:29,775 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 14:46:29,776 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 14:46:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 14:46:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 14:46:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 14:46:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:46:29,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:46:29,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:46:32,375 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:46:32,376 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 14:46:32,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:46:32 BoogieIcfgContainer [2020-07-21 14:46:32,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:46:32,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:46:32,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:46:32,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:46:32,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:46:27" (1/3) ... [2020-07-21 14:46:32,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687e2a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:46:32, skipping insertion in model container [2020-07-21 14:46:32,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:46:29" (2/3) ... [2020-07-21 14:46:32,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@687e2a0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:46:32, skipping insertion in model container [2020-07-21 14:46:32,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:46:32" (3/3) ... [2020-07-21 14:46:32,398 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 14:46:32,411 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:46:32,426 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:46:32,441 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:46:32,479 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:46:32,479 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:46:32,480 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:46:32,480 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:46:32,480 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:46:32,480 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:46:32,480 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:46:32,480 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:46:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-07-21 14:46:32,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 14:46:32,551 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:32,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:32,553 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:32,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:32,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-07-21 14:46:32,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:32,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131537655] [2020-07-21 14:46:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:33,049 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:33,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:33,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:33,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:33,482 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:33,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131537655] [2020-07-21 14:46:33,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:33,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:33,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491892438] [2020-07-21 14:46:33,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:33,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:33,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:33,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:33,516 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-07-21 14:46:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:33,903 INFO L93 Difference]: Finished difference Result 2336 states and 4147 transitions. [2020-07-21 14:46:33,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:46:33,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 14:46:33,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:33,932 INFO L225 Difference]: With dead ends: 2336 [2020-07-21 14:46:33,932 INFO L226 Difference]: Without dead ends: 1553 [2020-07-21 14:46:33,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:33,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1553 states. [2020-07-21 14:46:34,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1553 to 1551. [2020-07-21 14:46:34,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1551 states. [2020-07-21 14:46:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2402 transitions. [2020-07-21 14:46:34,096 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2402 transitions. Word has length 330 [2020-07-21 14:46:34,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:34,097 INFO L479 AbstractCegarLoop]: Abstraction has 1551 states and 2402 transitions. [2020-07-21 14:46:34,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:34,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2402 transitions. [2020-07-21 14:46:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 14:46:34,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:34,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:34,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:34,320 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash 548838318, now seen corresponding path program 1 times [2020-07-21 14:46:34,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:34,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505556620] [2020-07-21 14:46:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:34,711 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:34,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:34,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:34,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:34,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:34,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505556620] [2020-07-21 14:46:34,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:34,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:34,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43905079] [2020-07-21 14:46:34,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:34,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:34,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:34,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:34,915 INFO L87 Difference]: Start difference. First operand 1551 states and 2402 transitions. Second operand 4 states. [2020-07-21 14:46:35,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:35,235 INFO L93 Difference]: Finished difference Result 4577 states and 7083 transitions. [2020-07-21 14:46:35,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:46:35,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-21 14:46:35,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:35,258 INFO L225 Difference]: With dead ends: 4577 [2020-07-21 14:46:35,259 INFO L226 Difference]: Without dead ends: 3041 [2020-07-21 14:46:35,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2020-07-21 14:46:35,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 3039. [2020-07-21 14:46:35,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3039 states. [2020-07-21 14:46:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3039 states to 3039 states and 4677 transitions. [2020-07-21 14:46:35,408 INFO L78 Accepts]: Start accepts. Automaton has 3039 states and 4677 transitions. Word has length 332 [2020-07-21 14:46:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:35,414 INFO L479 AbstractCegarLoop]: Abstraction has 3039 states and 4677 transitions. [2020-07-21 14:46:35,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3039 states and 4677 transitions. [2020-07-21 14:46:35,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 14:46:35,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:35,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:35,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:35,641 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:35,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:35,642 INFO L82 PathProgramCache]: Analyzing trace with hash 314183633, now seen corresponding path program 1 times [2020-07-21 14:46:35,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:35,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632670316] [2020-07-21 14:46:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:35,920 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:35,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:35,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:35,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:36,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:36,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632670316] [2020-07-21 14:46:36,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:36,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:36,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683474371] [2020-07-21 14:46:36,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:36,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:36,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:36,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:36,142 INFO L87 Difference]: Start difference. First operand 3039 states and 4677 transitions. Second operand 4 states. [2020-07-21 14:46:36,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:36,464 INFO L93 Difference]: Finished difference Result 8981 states and 13808 transitions. [2020-07-21 14:46:36,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:46:36,464 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 14:46:36,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:36,495 INFO L225 Difference]: With dead ends: 8981 [2020-07-21 14:46:36,495 INFO L226 Difference]: Without dead ends: 5958 [2020-07-21 14:46:36,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:36,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5958 states. [2020-07-21 14:46:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5958 to 5956. [2020-07-21 14:46:36,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5956 states. [2020-07-21 14:46:36,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5956 states to 5956 states and 9104 transitions. [2020-07-21 14:46:36,761 INFO L78 Accepts]: Start accepts. Automaton has 5956 states and 9104 transitions. Word has length 334 [2020-07-21 14:46:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:36,762 INFO L479 AbstractCegarLoop]: Abstraction has 5956 states and 9104 transitions. [2020-07-21 14:46:36,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 5956 states and 9104 transitions. [2020-07-21 14:46:36,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 14:46:36,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:36,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:36,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:36,990 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:36,991 INFO L82 PathProgramCache]: Analyzing trace with hash 552724155, now seen corresponding path program 1 times [2020-07-21 14:46:36,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:36,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527581655] [2020-07-21 14:46:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:37,324 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:37,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:37,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:37,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:37,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:37,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527581655] [2020-07-21 14:46:37,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:37,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:37,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696300323] [2020-07-21 14:46:37,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:37,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:37,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:37,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:37,438 INFO L87 Difference]: Start difference. First operand 5956 states and 9104 transitions. Second operand 3 states. [2020-07-21 14:46:37,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:37,785 INFO L93 Difference]: Finished difference Result 17803 states and 27211 transitions. [2020-07-21 14:46:37,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:37,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 14:46:37,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:37,845 INFO L225 Difference]: With dead ends: 17803 [2020-07-21 14:46:37,846 INFO L226 Difference]: Without dead ends: 11880 [2020-07-21 14:46:37,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:37,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11880 states. [2020-07-21 14:46:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11880 to 5970. [2020-07-21 14:46:38,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5970 states. [2020-07-21 14:46:38,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5970 states to 5970 states and 9121 transitions. [2020-07-21 14:46:38,167 INFO L78 Accepts]: Start accepts. Automaton has 5970 states and 9121 transitions. Word has length 336 [2020-07-21 14:46:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:38,167 INFO L479 AbstractCegarLoop]: Abstraction has 5970 states and 9121 transitions. [2020-07-21 14:46:38,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:38,168 INFO L276 IsEmpty]: Start isEmpty. Operand 5970 states and 9121 transitions. [2020-07-21 14:46:38,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 14:46:38,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:38,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:38,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:38,398 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:38,399 INFO L82 PathProgramCache]: Analyzing trace with hash 704091151, now seen corresponding path program 1 times [2020-07-21 14:46:38,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:38,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788275159] [2020-07-21 14:46:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:38,695 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:38,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:38,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:46:38,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:38,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:38,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:38,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788275159] [2020-07-21 14:46:38,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:38,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:38,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485668213] [2020-07-21 14:46:38,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:38,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:38,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:38,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:38,897 INFO L87 Difference]: Start difference. First operand 5970 states and 9121 transitions. Second operand 4 states. [2020-07-21 14:46:39,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:39,420 INFO L93 Difference]: Finished difference Result 17613 states and 26882 transitions. [2020-07-21 14:46:39,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:46:39,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 14:46:39,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:39,479 INFO L225 Difference]: With dead ends: 17613 [2020-07-21 14:46:39,483 INFO L226 Difference]: Without dead ends: 11688 [2020-07-21 14:46:39,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11688 states. [2020-07-21 14:46:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11688 to 11686. [2020-07-21 14:46:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11686 states. [2020-07-21 14:46:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11686 states to 11686 states and 17730 transitions. [2020-07-21 14:46:40,063 INFO L78 Accepts]: Start accepts. Automaton has 11686 states and 17730 transitions. Word has length 338 [2020-07-21 14:46:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:40,064 INFO L479 AbstractCegarLoop]: Abstraction has 11686 states and 17730 transitions. [2020-07-21 14:46:40,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:40,064 INFO L276 IsEmpty]: Start isEmpty. Operand 11686 states and 17730 transitions. [2020-07-21 14:46:40,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 14:46:40,089 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:40,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:40,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:40,304 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:40,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:40,305 INFO L82 PathProgramCache]: Analyzing trace with hash -927576035, now seen corresponding path program 1 times [2020-07-21 14:46:40,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:40,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070008075] [2020-07-21 14:46:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:40,566 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:40,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:40,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:46:40,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:40,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:40,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070008075] [2020-07-21 14:46:40,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:40,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:40,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861115208] [2020-07-21 14:46:40,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:40,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:40,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:40,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:40,657 INFO L87 Difference]: Start difference. First operand 11686 states and 17730 transitions. Second operand 4 states. [2020-07-21 14:46:41,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:41,494 INFO L93 Difference]: Finished difference Result 32623 states and 49256 transitions. [2020-07-21 14:46:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:46:41,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-21 14:46:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:41,547 INFO L225 Difference]: With dead ends: 32623 [2020-07-21 14:46:41,547 INFO L226 Difference]: Without dead ends: 21885 [2020-07-21 14:46:41,575 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:41,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21885 states. [2020-07-21 14:46:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21885 to 12557. [2020-07-21 14:46:42,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12557 states. [2020-07-21 14:46:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12557 states to 12557 states and 19188 transitions. [2020-07-21 14:46:43,005 INFO L78 Accepts]: Start accepts. Automaton has 12557 states and 19188 transitions. Word has length 338 [2020-07-21 14:46:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:43,006 INFO L479 AbstractCegarLoop]: Abstraction has 12557 states and 19188 transitions. [2020-07-21 14:46:43,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:43,006 INFO L276 IsEmpty]: Start isEmpty. Operand 12557 states and 19188 transitions. [2020-07-21 14:46:43,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 14:46:43,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:43,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:43,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:43,248 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:43,248 INFO L82 PathProgramCache]: Analyzing trace with hash -90499940, now seen corresponding path program 1 times [2020-07-21 14:46:43,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:43,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085384982] [2020-07-21 14:46:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:43,497 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:43,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:43,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:46:43,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:43,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:43,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:43,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085384982] [2020-07-21 14:46:43,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:43,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:46:43,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169052551] [2020-07-21 14:46:43,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:46:43,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:43,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:46:43,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:46:43,615 INFO L87 Difference]: Start difference. First operand 12557 states and 19188 transitions. Second operand 4 states. [2020-07-21 14:46:44,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:44,345 INFO L93 Difference]: Finished difference Result 34258 states and 51986 transitions. [2020-07-21 14:46:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:46:44,346 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-21 14:46:44,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:44,413 INFO L225 Difference]: With dead ends: 34258 [2020-07-21 14:46:44,413 INFO L226 Difference]: Without dead ends: 23348 [2020-07-21 14:46:44,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:46:44,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23348 states. [2020-07-21 14:46:45,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23348 to 14048. [2020-07-21 14:46:45,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14048 states. [2020-07-21 14:46:45,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14048 states to 14048 states and 21662 transitions. [2020-07-21 14:46:45,085 INFO L78 Accepts]: Start accepts. Automaton has 14048 states and 21662 transitions. Word has length 340 [2020-07-21 14:46:45,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:45,086 INFO L479 AbstractCegarLoop]: Abstraction has 14048 states and 21662 transitions. [2020-07-21 14:46:45,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:46:45,086 INFO L276 IsEmpty]: Start isEmpty. Operand 14048 states and 21662 transitions. [2020-07-21 14:46:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 14:46:45,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:45,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:45,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:45,326 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:45,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:45,327 INFO L82 PathProgramCache]: Analyzing trace with hash -488597854, now seen corresponding path program 1 times [2020-07-21 14:46:45,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:45,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24141102] [2020-07-21 14:46:45,328 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:45,574 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:46:45,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:45,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:46:45,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:45,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:45,756 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:45,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24141102] [2020-07-21 14:46:45,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:45,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:45,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6626338] [2020-07-21 14:46:45,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:45,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:45,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:45,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:45,759 INFO L87 Difference]: Start difference. First operand 14048 states and 21662 transitions. Second operand 3 states. [2020-07-21 14:46:46,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:46,347 INFO L93 Difference]: Finished difference Result 35796 states and 54192 transitions. [2020-07-21 14:46:46,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:46,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 14:46:46,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:46,401 INFO L225 Difference]: With dead ends: 35796 [2020-07-21 14:46:46,401 INFO L226 Difference]: Without dead ends: 24956 [2020-07-21 14:46:46,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24956 states. [2020-07-21 14:46:47,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24956 to 14410. [2020-07-21 14:46:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14410 states. [2020-07-21 14:46:47,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14410 states to 14410 states and 22104 transitions. [2020-07-21 14:46:47,146 INFO L78 Accepts]: Start accepts. Automaton has 14410 states and 22104 transitions. Word has length 342 [2020-07-21 14:46:47,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:47,147 INFO L479 AbstractCegarLoop]: Abstraction has 14410 states and 22104 transitions. [2020-07-21 14:46:47,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:47,147 INFO L276 IsEmpty]: Start isEmpty. Operand 14410 states and 22104 transitions. [2020-07-21 14:46:47,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 14:46:47,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:47,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:47,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:47,377 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:47,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:47,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1205151862, now seen corresponding path program 1 times [2020-07-21 14:46:47,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:47,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664464439] [2020-07-21 14:46:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:47,721 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:46:47,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:47,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 2080 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:46:47,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:47,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:47,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664464439] [2020-07-21 14:46:47,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:47,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:47,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755926739] [2020-07-21 14:46:47,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:47,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:47,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:47,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:47,844 INFO L87 Difference]: Start difference. First operand 14410 states and 22104 transitions. Second operand 3 states. [2020-07-21 14:46:48,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:48,685 INFO L93 Difference]: Finished difference Result 24894 states and 38346 transitions. [2020-07-21 14:46:48,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:48,687 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 14:46:48,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:48,713 INFO L225 Difference]: With dead ends: 24894 [2020-07-21 14:46:48,713 INFO L226 Difference]: Without dead ends: 21876 [2020-07-21 14:46:48,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:48,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21876 states. [2020-07-21 14:46:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21876 to 21874. [2020-07-21 14:46:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21874 states. [2020-07-21 14:46:49,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21874 states to 21874 states and 33408 transitions. [2020-07-21 14:46:49,420 INFO L78 Accepts]: Start accepts. Automaton has 21874 states and 33408 transitions. Word has length 342 [2020-07-21 14:46:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:49,421 INFO L479 AbstractCegarLoop]: Abstraction has 21874 states and 33408 transitions. [2020-07-21 14:46:49,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:49,421 INFO L276 IsEmpty]: Start isEmpty. Operand 21874 states and 33408 transitions. [2020-07-21 14:46:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 14:46:49,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:49,446 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] [2020-07-21 14:46:49,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:49,652 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:49,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:49,653 INFO L82 PathProgramCache]: Analyzing trace with hash -100696936, now seen corresponding path program 1 times [2020-07-21 14:46:49,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:49,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446685672] [2020-07-21 14:46:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:50,195 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:46:50,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:50,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 2081 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:46:50,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:50,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:50,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:50,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446685672] [2020-07-21 14:46:50,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:50,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:46:50,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621520849] [2020-07-21 14:46:50,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:46:50,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:50,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:46:50,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:50,340 INFO L87 Difference]: Start difference. First operand 21874 states and 33408 transitions. Second operand 3 states. [2020-07-21 14:46:51,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:46:51,953 INFO L93 Difference]: Finished difference Result 40822 states and 62770 transitions. [2020-07-21 14:46:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:46:51,954 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 14:46:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:46:51,991 INFO L225 Difference]: With dead ends: 40822 [2020-07-21 14:46:51,991 INFO L226 Difference]: Without dead ends: 35892 [2020-07-21 14:46:52,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:46:52,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35892 states. [2020-07-21 14:46:53,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35892 to 35890. [2020-07-21 14:46:53,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35890 states. [2020-07-21 14:46:53,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35890 states to 35890 states and 54592 transitions. [2020-07-21 14:46:53,389 INFO L78 Accepts]: Start accepts. Automaton has 35890 states and 54592 transitions. Word has length 342 [2020-07-21 14:46:53,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:46:53,390 INFO L479 AbstractCegarLoop]: Abstraction has 35890 states and 54592 transitions. [2020-07-21 14:46:53,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:46:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 35890 states and 54592 transitions. [2020-07-21 14:46:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 14:46:53,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:46:53,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:46:53,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:53,619 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:46:53,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:46:53,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1245526759, now seen corresponding path program 1 times [2020-07-21 14:46:53,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:46:53,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362072181] [2020-07-21 14:46:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:46:53,985 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:46:53,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:46:53,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 2082 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 14:46:53,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:46:54,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:46:54,224 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:46:54,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362072181] [2020-07-21 14:46:54,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:46:54,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 14:46:54,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115089675] [2020-07-21 14:46:54,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 14:46:54,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:46:54,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 14:46:54,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 14:46:54,227 INFO L87 Difference]: Start difference. First operand 35890 states and 54592 transitions. Second operand 8 states. [2020-07-21 14:47:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:00,450 INFO L93 Difference]: Finished difference Result 114922 states and 175876 transitions. [2020-07-21 14:47:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 14:47:00,450 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-07-21 14:47:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:00,555 INFO L225 Difference]: With dead ends: 114922 [2020-07-21 14:47:00,556 INFO L226 Difference]: Without dead ends: 84848 [2020-07-21 14:47:00,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-21 14:47:00,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84848 states. [2020-07-21 14:47:02,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84848 to 48266. [2020-07-21 14:47:02,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48266 states. [2020-07-21 14:47:02,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48266 states to 48266 states and 72716 transitions. [2020-07-21 14:47:02,973 INFO L78 Accepts]: Start accepts. Automaton has 48266 states and 72716 transitions. Word has length 342 [2020-07-21 14:47:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:02,974 INFO L479 AbstractCegarLoop]: Abstraction has 48266 states and 72716 transitions. [2020-07-21 14:47:02,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 14:47:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 48266 states and 72716 transitions. [2020-07-21 14:47:03,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 14:47:03,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:03,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:47:03,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:03,224 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:03,225 INFO L82 PathProgramCache]: Analyzing trace with hash 883426392, now seen corresponding path program 1 times [2020-07-21 14:47:03,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:03,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650737381] [2020-07-21 14:47:03,226 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:03,732 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:03,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:03,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:03,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:03,813 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:03,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650737381] [2020-07-21 14:47:03,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:03,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:03,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886462001] [2020-07-21 14:47:03,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:03,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:03,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:03,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:03,816 INFO L87 Difference]: Start difference. First operand 48266 states and 72716 transitions. Second operand 3 states. [2020-07-21 14:47:07,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:07,764 INFO L93 Difference]: Finished difference Result 101542 states and 153260 transitions. [2020-07-21 14:47:07,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:07,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 14:47:07,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:07,825 INFO L225 Difference]: With dead ends: 101542 [2020-07-21 14:47:07,825 INFO L226 Difference]: Without dead ends: 62684 [2020-07-21 14:47:07,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62684 states. [2020-07-21 14:47:10,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62684 to 54334. [2020-07-21 14:47:10,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54334 states. [2020-07-21 14:47:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54334 states to 54334 states and 82580 transitions. [2020-07-21 14:47:10,424 INFO L78 Accepts]: Start accepts. Automaton has 54334 states and 82580 transitions. Word has length 342 [2020-07-21 14:47:10,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:10,427 INFO L479 AbstractCegarLoop]: Abstraction has 54334 states and 82580 transitions. [2020-07-21 14:47:10,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:47:10,428 INFO L276 IsEmpty]: Start isEmpty. Operand 54334 states and 82580 transitions. [2020-07-21 14:47:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 14:47:10,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:10,468 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] [2020-07-21 14:47:10,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:10,684 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:10,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash 144249245, now seen corresponding path program 1 times [2020-07-21 14:47:10,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:10,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425886757] [2020-07-21 14:47:10,686 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:10,931 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:10,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:10,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 1120 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:47:10,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:10,991 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:10,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425886757] [2020-07-21 14:47:10,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:10,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:10,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233068070] [2020-07-21 14:47:10,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:10,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:10,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:10,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:10,993 INFO L87 Difference]: Start difference. First operand 54334 states and 82580 transitions. Second operand 4 states. [2020-07-21 14:47:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:16,833 INFO L93 Difference]: Finished difference Result 154654 states and 234467 transitions. [2020-07-21 14:47:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:16,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-21 14:47:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:16,945 INFO L225 Difference]: With dead ends: 154654 [2020-07-21 14:47:16,945 INFO L226 Difference]: Without dead ends: 103576 [2020-07-21 14:47:16,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103576 states. [2020-07-21 14:47:20,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103576 to 56260. [2020-07-21 14:47:20,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56260 states. [2020-07-21 14:47:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56260 states to 56260 states and 85832 transitions. [2020-07-21 14:47:20,112 INFO L78 Accepts]: Start accepts. Automaton has 56260 states and 85832 transitions. Word has length 344 [2020-07-21 14:47:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:20,113 INFO L479 AbstractCegarLoop]: Abstraction has 56260 states and 85832 transitions. [2020-07-21 14:47:20,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:47:20,113 INFO L276 IsEmpty]: Start isEmpty. Operand 56260 states and 85832 transitions. [2020-07-21 14:47:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-21 14:47:20,152 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:20,152 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] [2020-07-21 14:47:20,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:20,353 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:20,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:20,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1701669183, now seen corresponding path program 1 times [2020-07-21 14:47:20,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:20,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497843956] [2020-07-21 14:47:20,355 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:20,592 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:47:20,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:20,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 1125 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 14:47:20,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:20,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:20,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:20,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497843956] [2020-07-21 14:47:20,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:20,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:47:20,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571963163] [2020-07-21 14:47:20,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:47:20,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:20,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:47:20,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:47:20,687 INFO L87 Difference]: Start difference. First operand 56260 states and 85832 transitions. Second operand 4 states. [2020-07-21 14:47:23,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:23,301 INFO L93 Difference]: Finished difference Result 103746 states and 157570 transitions. [2020-07-21 14:47:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:47:23,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-21 14:47:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:23,378 INFO L225 Difference]: With dead ends: 103746 [2020-07-21 14:47:23,378 INFO L226 Difference]: Without dead ends: 51668 [2020-07-21 14:47:23,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:23,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51668 states. [2020-07-21 14:47:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51668 to 51668. [2020-07-21 14:47:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51668 states. [2020-07-21 14:47:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51668 states to 51668 states and 78715 transitions. [2020-07-21 14:47:27,498 INFO L78 Accepts]: Start accepts. Automaton has 51668 states and 78715 transitions. Word has length 344 [2020-07-21 14:47:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:27,498 INFO L479 AbstractCegarLoop]: Abstraction has 51668 states and 78715 transitions. [2020-07-21 14:47:27,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:47:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 51668 states and 78715 transitions. [2020-07-21 14:47:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-21 14:47:27,526 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:27,527 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] [2020-07-21 14:47:27,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:27,728 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:27,728 INFO L82 PathProgramCache]: Analyzing trace with hash 568457002, now seen corresponding path program 1 times [2020-07-21 14:47:27,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:27,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839818837] [2020-07-21 14:47:27,729 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:28,102 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:47:28,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:28,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 2087 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 14:47:28,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:28,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:28,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839818837] [2020-07-21 14:47:28,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:28,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 14:47:28,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446097556] [2020-07-21 14:47:28,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 14:47:28,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:28,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 14:47:28,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-21 14:47:28,540 INFO L87 Difference]: Start difference. First operand 51668 states and 78715 transitions. Second operand 5 states. [2020-07-21 14:47:33,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:33,844 INFO L93 Difference]: Finished difference Result 115516 states and 177822 transitions. [2020-07-21 14:47:33,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 14:47:33,845 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 345 [2020-07-21 14:47:33,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:33,953 INFO L225 Difference]: With dead ends: 115516 [2020-07-21 14:47:33,953 INFO L226 Difference]: Without dead ends: 93730 [2020-07-21 14:47:33,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-07-21 14:47:34,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93730 states. [2020-07-21 14:47:39,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93730 to 93728. [2020-07-21 14:47:39,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93728 states. [2020-07-21 14:47:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93728 states to 93728 states and 142554 transitions. [2020-07-21 14:47:39,393 INFO L78 Accepts]: Start accepts. Automaton has 93728 states and 142554 transitions. Word has length 345 [2020-07-21 14:47:39,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:47:39,394 INFO L479 AbstractCegarLoop]: Abstraction has 93728 states and 142554 transitions. [2020-07-21 14:47:39,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 14:47:39,394 INFO L276 IsEmpty]: Start isEmpty. Operand 93728 states and 142554 transitions. [2020-07-21 14:47:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-21 14:47:39,441 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:47:39,441 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] [2020-07-21 14:47:39,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:39,642 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:47:39,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:47:39,643 INFO L82 PathProgramCache]: Analyzing trace with hash 888265967, now seen corresponding path program 1 times [2020-07-21 14:47:39,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:47:39,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580090663] [2020-07-21 14:47:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:47:40,008 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:47:40,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:47:40,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 2088 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:47:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:47:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:47:42,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:47:42,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580090663] [2020-07-21 14:47:42,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:47:42,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:47:42,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034184820] [2020-07-21 14:47:42,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:47:42,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:47:42,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:47:42,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:42,083 INFO L87 Difference]: Start difference. First operand 93728 states and 142554 transitions. Second operand 3 states. [2020-07-21 14:47:51,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:47:51,159 INFO L93 Difference]: Finished difference Result 269862 states and 409402 transitions. [2020-07-21 14:47:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:47:51,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 345 [2020-07-21 14:47:51,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:47:51,416 INFO L225 Difference]: With dead ends: 269862 [2020-07-21 14:47:51,417 INFO L226 Difference]: Without dead ends: 180503 [2020-07-21 14:47:51,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:47:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180503 states. [2020-07-21 14:48:04,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180503 to 180501. [2020-07-21 14:48:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180501 states. [2020-07-21 14:48:04,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180501 states to 180501 states and 272827 transitions. [2020-07-21 14:48:04,735 INFO L78 Accepts]: Start accepts. Automaton has 180501 states and 272827 transitions. Word has length 345 [2020-07-21 14:48:04,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:48:04,735 INFO L479 AbstractCegarLoop]: Abstraction has 180501 states and 272827 transitions. [2020-07-21 14:48:04,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:48:04,736 INFO L276 IsEmpty]: Start isEmpty. Operand 180501 states and 272827 transitions. [2020-07-21 14:48:04,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 14:48:04,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:48:04,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:48:05,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:05,049 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:48:05,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:48:05,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1328696735, now seen corresponding path program 1 times [2020-07-21 14:48:05,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:48:05,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541068908] [2020-07-21 14:48:05,051 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:48:05,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:48:05,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:48:05,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 14:48:05,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:48:05,869 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 14:48:05,962 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-07-21 14:48:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:48:07,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:48:07,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541068908] [2020-07-21 14:48:07,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:48:07,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-21 14:48:07,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545630968] [2020-07-21 14:48:07,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 14:48:07,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:48:07,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 14:48:07,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-21 14:48:07,164 INFO L87 Difference]: Start difference. First operand 180501 states and 272827 transitions. Second operand 10 states. [2020-07-21 14:48:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:48:37,915 INFO L93 Difference]: Finished difference Result 425237 states and 653478 transitions. [2020-07-21 14:48:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 14:48:37,915 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 346 [2020-07-21 14:48:37,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:48:38,444 INFO L225 Difference]: With dead ends: 425237 [2020-07-21 14:48:38,444 INFO L226 Difference]: Without dead ends: 380211 [2020-07-21 14:48:38,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 319 SyntacticMatches, 18 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-07-21 14:48:38,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380211 states. [2020-07-21 14:49:03,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380211 to 239125. [2020-07-21 14:49:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239125 states. [2020-07-21 14:49:03,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239125 states to 239125 states and 364243 transitions. [2020-07-21 14:49:03,634 INFO L78 Accepts]: Start accepts. Automaton has 239125 states and 364243 transitions. Word has length 346 [2020-07-21 14:49:03,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:49:03,635 INFO L479 AbstractCegarLoop]: Abstraction has 239125 states and 364243 transitions. [2020-07-21 14:49:03,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 14:49:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 239125 states and 364243 transitions. [2020-07-21 14:49:03,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 14:49:03,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:49:03,734 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] [2020-07-21 14:49:03,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:03,935 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:49:03,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:49:03,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1911915563, now seen corresponding path program 1 times [2020-07-21 14:49:03,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:49:03,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235382112] [2020-07-21 14:49:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:49:04,295 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:49:04,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:49:04,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 2089 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:49:04,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:49:04,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:49:04,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:49:04,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235382112] [2020-07-21 14:49:04,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:49:04,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:49:04,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845884720] [2020-07-21 14:49:04,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:49:04,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:49:04,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:49:04,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:04,381 INFO L87 Difference]: Start difference. First operand 239125 states and 364243 transitions. Second operand 3 states. [2020-07-21 14:49:40,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:49:40,100 INFO L93 Difference]: Finished difference Result 591891 states and 912819 transitions. [2020-07-21 14:49:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:49:40,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-21 14:49:40,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:49:40,724 INFO L225 Difference]: With dead ends: 591891 [2020-07-21 14:49:40,724 INFO L226 Difference]: Without dead ends: 461501 [2020-07-21 14:49:40,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:49:41,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461501 states. [2020-07-21 14:50:27,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461501 to 461499. [2020-07-21 14:50:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461499 states. [2020-07-21 14:50:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461499 states to 461499 states and 702417 transitions. [2020-07-21 14:50:29,236 INFO L78 Accepts]: Start accepts. Automaton has 461499 states and 702417 transitions. Word has length 346 [2020-07-21 14:50:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:50:29,236 INFO L479 AbstractCegarLoop]: Abstraction has 461499 states and 702417 transitions. [2020-07-21 14:50:29,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:50:29,236 INFO L276 IsEmpty]: Start isEmpty. Operand 461499 states and 702417 transitions. [2020-07-21 14:50:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 14:50:29,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:50:29,435 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] [2020-07-21 14:50:29,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:29,636 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:50:29,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:50:29,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1708271820, now seen corresponding path program 1 times [2020-07-21 14:50:29,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:50:29,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73400593] [2020-07-21 14:50:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:50:30,001 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:50:30,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:50:30,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 2090 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:50:30,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:50:30,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:50:30,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:50:30,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73400593] [2020-07-21 14:50:30,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:50:30,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:50:30,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112679800] [2020-07-21 14:50:30,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:50:30,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:50:30,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:50:30,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:50:30,108 INFO L87 Difference]: Start difference. First operand 461499 states and 702417 transitions. Second operand 3 states. [2020-07-21 14:51:50,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:51:50,301 INFO L93 Difference]: Finished difference Result 1360697 states and 2067696 transitions. [2020-07-21 14:51:50,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:51:50,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-21 14:51:50,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:51:51,819 INFO L225 Difference]: With dead ends: 1360697 [2020-07-21 14:51:51,819 INFO L226 Difference]: Without dead ends: 902528 [2020-07-21 14:51:52,177 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:51:52,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902528 states. [2020-07-21 14:53:38,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902528 to 902526. [2020-07-21 14:53:38,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 902526 states. [2020-07-21 14:53:42,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902526 states to 902526 states and 1364605 transitions. [2020-07-21 14:53:42,282 INFO L78 Accepts]: Start accepts. Automaton has 902526 states and 1364605 transitions. Word has length 346 [2020-07-21 14:53:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:53:42,282 INFO L479 AbstractCegarLoop]: Abstraction has 902526 states and 1364605 transitions. [2020-07-21 14:53:42,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 14:53:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 902526 states and 1364605 transitions. [2020-07-21 14:53:42,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-21 14:53:42,730 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:53:42,730 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] [2020-07-21 14:53:42,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:53:42,936 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:53:42,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:53:42,937 INFO L82 PathProgramCache]: Analyzing trace with hash -601640625, now seen corresponding path program 1 times [2020-07-21 14:53:42,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:53:42,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676818396] [2020-07-21 14:53:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:53:43,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:53:43,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:53:43,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 14:53:43,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:53:43,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:53:43,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:53:43,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676818396] [2020-07-21 14:53:43,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:53:43,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 14:53:43,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478620899] [2020-07-21 14:53:43,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 14:53:43,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:53:43,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 14:53:43,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:53:43,240 INFO L87 Difference]: Start difference. First operand 902526 states and 1364605 transitions. Second operand 3 states. [2020-07-21 14:56:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:56:45,500 INFO L93 Difference]: Finished difference Result 2704145 states and 4088086 transitions. [2020-07-21 14:56:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 14:56:45,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-21 14:56:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:56:49,304 INFO L225 Difference]: With dead ends: 2704145 [2020-07-21 14:56:49,305 INFO L226 Difference]: Without dead ends: 1803413 [2020-07-21 14:56:50,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 14:56:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1803413 states.