/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 02:23:01,072 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 02:23:01,075 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 02:23:01,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 02:23:01,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 02:23:01,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 02:23:01,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 02:23:01,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 02:23:01,115 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 02:23:01,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 02:23:01,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 02:23:01,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 02:23:01,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 02:23:01,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 02:23:01,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 02:23:01,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 02:23:01,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 02:23:01,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 02:23:01,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 02:23:01,135 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 02:23:01,140 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 02:23:01,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 02:23:01,145 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 02:23:01,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 02:23:01,148 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 02:23:01,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 02:23:01,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 02:23:01,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 02:23:01,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 02:23:01,194 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 02:23:01,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 02:23:01,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 02:23:01,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 02:23:01,196 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 02:23:01,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 02:23:01,196 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 02:23:01,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 02:23:01,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 02:23:01,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 02:23:01,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 02:23:01,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 02:23:01,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 02:23:01,198 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 02:23:01,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 02:23:01,198 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 02:23:01,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 02:23:01,201 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 02:23:01,201 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 02:23:01,202 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 02:23:01,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 02:23:01,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:23:01,202 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 02:23:01,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 02:23:01,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 02:23:01,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 02:23:01,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:01,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 02:23:01,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 02:23:01,204 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 02:23:01,470 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 02:23:01,483 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 02:23:01,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 02:23:01,487 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 02:23:01,488 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 02:23:01,488 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:23:01,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53582dc9d/4f2e7d5ae3064cd18bcc992fa87b8309/FLAG39cbbf39b [2020-07-21 02:23:02,195 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 02:23:02,196 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:23:02,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53582dc9d/4f2e7d5ae3064cd18bcc992fa87b8309/FLAG39cbbf39b [2020-07-21 02:23:02,384 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53582dc9d/4f2e7d5ae3064cd18bcc992fa87b8309 [2020-07-21 02:23:02,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 02:23:02,398 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 02:23:02,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 02:23:02,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 02:23:02,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 02:23:02,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:23:02" (1/1) ... [2020-07-21 02:23:02,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a22f013 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:02, skipping insertion in model container [2020-07-21 02:23:02,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:23:02" (1/1) ... [2020-07-21 02:23:02,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 02:23:02,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 02:23:03,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:23:03,629 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 02:23:04,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 02:23:04,185 INFO L208 MainTranslator]: Completed translation [2020-07-21 02:23:04,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:04 WrapperNode [2020-07-21 02:23:04,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 02:23:04,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 02:23:04,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 02:23:04,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 02:23:04,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:04" (1/1) ... [2020-07-21 02:23:04,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:04" (1/1) ... [2020-07-21 02:23:04,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:04" (1/1) ... [2020-07-21 02:23:04,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:04" (1/1) ... [2020-07-21 02:23:04,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:04" (1/1) ... [2020-07-21 02:23:04,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:04" (1/1) ... [2020-07-21 02:23:04,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:04" (1/1) ... [2020-07-21 02:23:04,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 02:23:04,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 02:23:04,398 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 02:23:04,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 02:23:04,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 02:23:04,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 02:23:04,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 02:23:04,507 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 02:23:04,507 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 02:23:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 02:23:04,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-21 02:23:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-21 02:23:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-21 02:23:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-21 02:23:04,509 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 02:23:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 02:23:04,510 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-21 02:23:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-21 02:23:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-21 02:23:04,511 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-21 02:23:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-21 02:23:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-21 02:23:04,512 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-21 02:23:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-21 02:23:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 02:23:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 02:23:04,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 02:23:07,168 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 02:23:07,168 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 02:23:07,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:23:07 BoogieIcfgContainer [2020-07-21 02:23:07,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 02:23:07,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 02:23:07,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 02:23:07,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 02:23:07,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:23:02" (1/3) ... [2020-07-21 02:23:07,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a963db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:23:07, skipping insertion in model container [2020-07-21 02:23:07,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:23:04" (2/3) ... [2020-07-21 02:23:07,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a963db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:23:07, skipping insertion in model container [2020-07-21 02:23:07,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:23:07" (3/3) ... [2020-07-21 02:23:07,189 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-21 02:23:07,200 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 02:23:07,210 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 02:23:07,225 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 02:23:07,256 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 02:23:07,256 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 02:23:07,256 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 02:23:07,257 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 02:23:07,257 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 02:23:07,257 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 02:23:07,257 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 02:23:07,257 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 02:23:07,294 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-07-21 02:23:07,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-21 02:23:07,321 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:07,323 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 02:23:07,323 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:07,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:07,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-07-21 02:23:07,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:07,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909037878] [2020-07-21 02:23:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:07,878 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:07,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:07,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 1494 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:23:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:08,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:08,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909037878] [2020-07-21 02:23:08,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:08,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:08,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209992072] [2020-07-21 02:23:08,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:08,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:08,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:08,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:08,224 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-07-21 02:23:08,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:08,524 INFO L93 Difference]: Finished difference Result 2372 states and 4213 transitions. [2020-07-21 02:23:08,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:23:08,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-21 02:23:08,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:08,556 INFO L225 Difference]: With dead ends: 2372 [2020-07-21 02:23:08,556 INFO L226 Difference]: Without dead ends: 1571 [2020-07-21 02:23:08,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:08,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2020-07-21 02:23:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1569. [2020-07-21 02:23:08,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1569 states. [2020-07-21 02:23:08,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1569 states to 1569 states and 2435 transitions. [2020-07-21 02:23:08,710 INFO L78 Accepts]: Start accepts. Automaton has 1569 states and 2435 transitions. Word has length 330 [2020-07-21 02:23:08,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:08,712 INFO L479 AbstractCegarLoop]: Abstraction has 1569 states and 2435 transitions. [2020-07-21 02:23:08,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1569 states and 2435 transitions. [2020-07-21 02:23:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:23:08,727 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:08,728 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 02:23:08,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:08,930 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:08,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:08,931 INFO L82 PathProgramCache]: Analyzing trace with hash -204785929, now seen corresponding path program 1 times [2020-07-21 02:23:08,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:08,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100345671] [2020-07-21 02:23:08,933 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:09,330 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:09,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:09,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1445 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:09,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:09,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:09,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100345671] [2020-07-21 02:23:09,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:09,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:09,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712985703] [2020-07-21 02:23:09,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:09,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:09,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:09,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:09,542 INFO L87 Difference]: Start difference. First operand 1569 states and 2435 transitions. Second operand 3 states. [2020-07-21 02:23:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:09,713 INFO L93 Difference]: Finished difference Result 4516 states and 6977 transitions. [2020-07-21 02:23:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:09,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 02:23:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:09,730 INFO L225 Difference]: With dead ends: 4516 [2020-07-21 02:23:09,730 INFO L226 Difference]: Without dead ends: 3076 [2020-07-21 02:23:09,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:09,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2020-07-21 02:23:09,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 3074. [2020-07-21 02:23:09,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3074 states. [2020-07-21 02:23:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 4747 transitions. [2020-07-21 02:23:09,847 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 4747 transitions. Word has length 332 [2020-07-21 02:23:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:09,848 INFO L479 AbstractCegarLoop]: Abstraction has 3074 states and 4747 transitions. [2020-07-21 02:23:09,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 4747 transitions. [2020-07-21 02:23:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-21 02:23:09,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:09,859 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 02:23:10,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:10,074 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:10,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:10,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1084618052, now seen corresponding path program 1 times [2020-07-21 02:23:10,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:10,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917604492] [2020-07-21 02:23:10,075 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:10,331 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:10,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:10,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:10,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:10,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:10,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:10,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917604492] [2020-07-21 02:23:10,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:10,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:10,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415036672] [2020-07-21 02:23:10,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:10,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:10,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:10,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:10,479 INFO L87 Difference]: Start difference. First operand 3074 states and 4747 transitions. Second operand 3 states. [2020-07-21 02:23:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:10,677 INFO L93 Difference]: Finished difference Result 9147 states and 14117 transitions. [2020-07-21 02:23:10,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:10,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 332 [2020-07-21 02:23:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:10,707 INFO L225 Difference]: With dead ends: 9147 [2020-07-21 02:23:10,707 INFO L226 Difference]: Without dead ends: 6115 [2020-07-21 02:23:10,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:10,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6115 states. [2020-07-21 02:23:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6115 to 3093. [2020-07-21 02:23:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3093 states. [2020-07-21 02:23:10,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3093 states to 3093 states and 4775 transitions. [2020-07-21 02:23:10,884 INFO L78 Accepts]: Start accepts. Automaton has 3093 states and 4775 transitions. Word has length 332 [2020-07-21 02:23:10,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:10,884 INFO L479 AbstractCegarLoop]: Abstraction has 3093 states and 4775 transitions. [2020-07-21 02:23:10,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:10,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3093 states and 4775 transitions. [2020-07-21 02:23:10,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-07-21 02:23:10,894 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:10,895 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] [2020-07-21 02:23:11,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:11,108 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:11,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:11,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1652172680, now seen corresponding path program 1 times [2020-07-21 02:23:11,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:11,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954180900] [2020-07-21 02:23:11,111 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:11,436 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:11,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:11,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:11,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:11,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:11,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:11,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954180900] [2020-07-21 02:23:11,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:11,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:11,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398393916] [2020-07-21 02:23:11,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:11,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:11,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:11,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:11,518 INFO L87 Difference]: Start difference. First operand 3093 states and 4775 transitions. Second operand 3 states. [2020-07-21 02:23:11,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:11,729 INFO L93 Difference]: Finished difference Result 9166 states and 14138 transitions. [2020-07-21 02:23:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:11,729 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 333 [2020-07-21 02:23:11,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:11,759 INFO L225 Difference]: With dead ends: 9166 [2020-07-21 02:23:11,759 INFO L226 Difference]: Without dead ends: 6133 [2020-07-21 02:23:11,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 331 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:11,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6133 states. [2020-07-21 02:23:11,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6133 to 3111. [2020-07-21 02:23:11,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3111 states. [2020-07-21 02:23:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 4796 transitions. [2020-07-21 02:23:11,940 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 4796 transitions. Word has length 333 [2020-07-21 02:23:11,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:11,940 INFO L479 AbstractCegarLoop]: Abstraction has 3111 states and 4796 transitions. [2020-07-21 02:23:11,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 4796 transitions. [2020-07-21 02:23:11,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-21 02:23:11,952 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:11,952 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 02:23:12,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:12,167 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:12,167 INFO L82 PathProgramCache]: Analyzing trace with hash 381313074, now seen corresponding path program 1 times [2020-07-21 02:23:12,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:12,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712730822] [2020-07-21 02:23:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:12,427 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:12,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:12,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:23:12,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:12,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:12,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:12,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712730822] [2020-07-21 02:23:12,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:12,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:12,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357923043] [2020-07-21 02:23:12,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:12,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:12,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:12,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:12,517 INFO L87 Difference]: Start difference. First operand 3111 states and 4796 transitions. Second operand 4 states. [2020-07-21 02:23:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:12,755 INFO L93 Difference]: Finished difference Result 6883 states and 10592 transitions. [2020-07-21 02:23:12,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:23:12,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-21 02:23:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:12,773 INFO L225 Difference]: With dead ends: 6883 [2020-07-21 02:23:12,773 INFO L226 Difference]: Without dead ends: 3564 [2020-07-21 02:23:12,781 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 02:23:12,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2020-07-21 02:23:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 3562. [2020-07-21 02:23:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3562 states. [2020-07-21 02:23:12,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 5470 transitions. [2020-07-21 02:23:12,951 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 5470 transitions. Word has length 334 [2020-07-21 02:23:12,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:12,952 INFO L479 AbstractCegarLoop]: Abstraction has 3562 states and 5470 transitions. [2020-07-21 02:23:12,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:12,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 5470 transitions. [2020-07-21 02:23:12,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 02:23:12,964 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:12,964 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 02:23:13,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:13,178 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:13,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:13,178 INFO L82 PathProgramCache]: Analyzing trace with hash -852397371, now seen corresponding path program 1 times [2020-07-21 02:23:13,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:13,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427276979] [2020-07-21 02:23:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:13,489 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:13,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:13,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:13,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:13,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:13,558 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:13,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427276979] [2020-07-21 02:23:13,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:13,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:13,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679155985] [2020-07-21 02:23:13,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:13,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:13,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:13,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:13,561 INFO L87 Difference]: Start difference. First operand 3562 states and 5470 transitions. Second operand 3 states. [2020-07-21 02:23:13,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:13,763 INFO L93 Difference]: Finished difference Result 10130 states and 15474 transitions. [2020-07-21 02:23:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:13,764 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 02:23:13,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:13,803 INFO L225 Difference]: With dead ends: 10130 [2020-07-21 02:23:13,803 INFO L226 Difference]: Without dead ends: 6857 [2020-07-21 02:23:13,812 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 02:23:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6857 states. [2020-07-21 02:23:14,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6857 to 3596. [2020-07-21 02:23:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3596 states. [2020-07-21 02:23:14,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3596 states to 3596 states and 5514 transitions. [2020-07-21 02:23:14,039 INFO L78 Accepts]: Start accepts. Automaton has 3596 states and 5514 transitions. Word has length 336 [2020-07-21 02:23:14,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:14,040 INFO L479 AbstractCegarLoop]: Abstraction has 3596 states and 5514 transitions. [2020-07-21 02:23:14,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:14,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3596 states and 5514 transitions. [2020-07-21 02:23:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 02:23:14,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:14,050 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 02:23:14,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:14,265 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:14,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:14,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2139573579, now seen corresponding path program 1 times [2020-07-21 02:23:14,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:14,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634985391] [2020-07-21 02:23:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:14,564 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:14,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:14,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:14,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:14,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:14,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634985391] [2020-07-21 02:23:14,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:14,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:14,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213744004] [2020-07-21 02:23:14,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:14,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:14,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:14,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:14,701 INFO L87 Difference]: Start difference. First operand 3596 states and 5514 transitions. Second operand 3 states. [2020-07-21 02:23:14,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:14,989 INFO L93 Difference]: Finished difference Result 10101 states and 15404 transitions. [2020-07-21 02:23:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:14,990 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 02:23:14,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:15,031 INFO L225 Difference]: With dead ends: 10101 [2020-07-21 02:23:15,031 INFO L226 Difference]: Without dead ends: 6933 [2020-07-21 02:23:15,043 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 02:23:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6933 states. [2020-07-21 02:23:15,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6933 to 6931. [2020-07-21 02:23:15,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6931 states. [2020-07-21 02:23:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6931 states to 6931 states and 10557 transitions. [2020-07-21 02:23:15,439 INFO L78 Accepts]: Start accepts. Automaton has 6931 states and 10557 transitions. Word has length 336 [2020-07-21 02:23:15,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:15,439 INFO L479 AbstractCegarLoop]: Abstraction has 6931 states and 10557 transitions. [2020-07-21 02:23:15,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:15,440 INFO L276 IsEmpty]: Start isEmpty. Operand 6931 states and 10557 transitions. [2020-07-21 02:23:15,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 02:23:15,453 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:15,454 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 02:23:15,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:15,668 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:15,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:15,669 INFO L82 PathProgramCache]: Analyzing trace with hash 750611576, now seen corresponding path program 1 times [2020-07-21 02:23:15,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:15,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711095516] [2020-07-21 02:23:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:15,933 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:15,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:15,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:23:15,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:16,026 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:16,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711095516] [2020-07-21 02:23:16,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:16,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:16,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106680058] [2020-07-21 02:23:16,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:16,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:16,029 INFO L87 Difference]: Start difference. First operand 6931 states and 10557 transitions. Second operand 4 states. [2020-07-21 02:23:16,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:16,435 INFO L93 Difference]: Finished difference Result 18517 states and 27990 transitions. [2020-07-21 02:23:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:23:16,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-07-21 02:23:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:16,468 INFO L225 Difference]: With dead ends: 18517 [2020-07-21 02:23:16,469 INFO L226 Difference]: Without dead ends: 12413 [2020-07-21 02:23:16,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:16,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12413 states. [2020-07-21 02:23:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12413 to 7204. [2020-07-21 02:23:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7204 states. [2020-07-21 02:23:16,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7204 states to 7204 states and 10990 transitions. [2020-07-21 02:23:16,878 INFO L78 Accepts]: Start accepts. Automaton has 7204 states and 10990 transitions. Word has length 336 [2020-07-21 02:23:16,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:16,878 INFO L479 AbstractCegarLoop]: Abstraction has 7204 states and 10990 transitions. [2020-07-21 02:23:16,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:16,878 INFO L276 IsEmpty]: Start isEmpty. Operand 7204 states and 10990 transitions. [2020-07-21 02:23:16,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 02:23:16,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:16,892 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 02:23:17,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:17,106 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:17,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:17,106 INFO L82 PathProgramCache]: Analyzing trace with hash -321046049, now seen corresponding path program 1 times [2020-07-21 02:23:17,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:17,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870387117] [2020-07-21 02:23:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:17,367 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:17,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:17,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1503 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 02:23:17,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:17,569 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:17,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870387117] [2020-07-21 02:23:17,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:17,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 02:23:17,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585515720] [2020-07-21 02:23:17,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 02:23:17,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:17,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 02:23:17,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 02:23:17,571 INFO L87 Difference]: Start difference. First operand 7204 states and 10990 transitions. Second operand 8 states. [2020-07-21 02:23:19,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:19,499 INFO L93 Difference]: Finished difference Result 15953 states and 24439 transitions. [2020-07-21 02:23:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 02:23:19,500 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 336 [2020-07-21 02:23:19,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:19,526 INFO L225 Difference]: With dead ends: 15953 [2020-07-21 02:23:19,527 INFO L226 Difference]: Without dead ends: 11499 [2020-07-21 02:23:19,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 329 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 02:23:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11499 states. [2020-07-21 02:23:20,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11499 to 9198. [2020-07-21 02:23:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9198 states. [2020-07-21 02:23:20,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9198 states to 9198 states and 13890 transitions. [2020-07-21 02:23:20,118 INFO L78 Accepts]: Start accepts. Automaton has 9198 states and 13890 transitions. Word has length 336 [2020-07-21 02:23:20,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:20,119 INFO L479 AbstractCegarLoop]: Abstraction has 9198 states and 13890 transitions. [2020-07-21 02:23:20,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 02:23:20,119 INFO L276 IsEmpty]: Start isEmpty. Operand 9198 states and 13890 transitions. [2020-07-21 02:23:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-21 02:23:20,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:20,134 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 02:23:20,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:20,350 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:20,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:20,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1807907102, now seen corresponding path program 1 times [2020-07-21 02:23:20,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:20,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604162880] [2020-07-21 02:23:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:20,637 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:20,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:20,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1499 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:20,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:20,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:20,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604162880] [2020-07-21 02:23:20,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:20,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:20,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010919819] [2020-07-21 02:23:20,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:20,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:20,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:20,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:20,706 INFO L87 Difference]: Start difference. First operand 9198 states and 13890 transitions. Second operand 3 states. [2020-07-21 02:23:21,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:21,104 INFO L93 Difference]: Finished difference Result 17654 states and 26648 transitions. [2020-07-21 02:23:21,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:21,105 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-21 02:23:21,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:21,124 INFO L225 Difference]: With dead ends: 17654 [2020-07-21 02:23:21,125 INFO L226 Difference]: Without dead ends: 11050 [2020-07-21 02:23:21,141 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 02:23:21,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11050 states. [2020-07-21 02:23:21,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11050 to 9696. [2020-07-21 02:23:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9696 states. [2020-07-21 02:23:21,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9696 states to 9696 states and 14708 transitions. [2020-07-21 02:23:21,742 INFO L78 Accepts]: Start accepts. Automaton has 9696 states and 14708 transitions. Word has length 336 [2020-07-21 02:23:21,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:21,743 INFO L479 AbstractCegarLoop]: Abstraction has 9696 states and 14708 transitions. [2020-07-21 02:23:21,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 9696 states and 14708 transitions. [2020-07-21 02:23:21,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 02:23:21,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:21,756 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 02:23:21,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:21,970 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:21,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:21,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1962923333, now seen corresponding path program 1 times [2020-07-21 02:23:21,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:21,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094456194] [2020-07-21 02:23:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:22,254 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:22,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:22,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 1502 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:22,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:22,324 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:22,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094456194] [2020-07-21 02:23:22,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:22,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:22,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547915795] [2020-07-21 02:23:22,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:22,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:22,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:22,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:22,326 INFO L87 Difference]: Start difference. First operand 9696 states and 14708 transitions. Second operand 3 states. [2020-07-21 02:23:23,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:23,334 INFO L93 Difference]: Finished difference Result 20356 states and 31014 transitions. [2020-07-21 02:23:23,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:23,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 02:23:23,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:23,353 INFO L225 Difference]: With dead ends: 20356 [2020-07-21 02:23:23,354 INFO L226 Difference]: Without dead ends: 13686 [2020-07-21 02:23:23,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13686 states. [2020-07-21 02:23:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13686 to 12156. [2020-07-21 02:23:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12156 states. [2020-07-21 02:23:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12156 states to 12156 states and 18602 transitions. [2020-07-21 02:23:23,912 INFO L78 Accepts]: Start accepts. Automaton has 12156 states and 18602 transitions. Word has length 338 [2020-07-21 02:23:23,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:23,913 INFO L479 AbstractCegarLoop]: Abstraction has 12156 states and 18602 transitions. [2020-07-21 02:23:23,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:23,913 INFO L276 IsEmpty]: Start isEmpty. Operand 12156 states and 18602 transitions. [2020-07-21 02:23:23,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-21 02:23:23,924 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:23,924 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 02:23:24,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:24,125 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1698293508, now seen corresponding path program 1 times [2020-07-21 02:23:24,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:24,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054808363] [2020-07-21 02:23:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:24,369 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:24,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:24,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:24,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:24,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:24,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054808363] [2020-07-21 02:23:24,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:24,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:24,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193119842] [2020-07-21 02:23:24,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:24,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:24,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:24,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:24,452 INFO L87 Difference]: Start difference. First operand 12156 states and 18602 transitions. Second operand 3 states. [2020-07-21 02:23:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:25,955 INFO L93 Difference]: Finished difference Result 34070 states and 51823 transitions. [2020-07-21 02:23:25,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:25,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 338 [2020-07-21 02:23:25,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:25,981 INFO L225 Difference]: With dead ends: 34070 [2020-07-21 02:23:25,981 INFO L226 Difference]: Without dead ends: 23046 [2020-07-21 02:23:26,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:26,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23046 states. [2020-07-21 02:23:26,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23046 to 12270. [2020-07-21 02:23:26,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12270 states. [2020-07-21 02:23:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12270 states to 12270 states and 18754 transitions. [2020-07-21 02:23:26,816 INFO L78 Accepts]: Start accepts. Automaton has 12270 states and 18754 transitions. Word has length 338 [2020-07-21 02:23:26,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:26,816 INFO L479 AbstractCegarLoop]: Abstraction has 12270 states and 18754 transitions. [2020-07-21 02:23:26,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 12270 states and 18754 transitions. [2020-07-21 02:23:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 02:23:26,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:26,830 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] [2020-07-21 02:23:27,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:27,042 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:27,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:27,043 INFO L82 PathProgramCache]: Analyzing trace with hash 568793008, now seen corresponding path program 1 times [2020-07-21 02:23:27,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:27,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771051386] [2020-07-21 02:23:27,044 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:27,297 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:27,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:27,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:27,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:27,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:27,357 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:27,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771051386] [2020-07-21 02:23:27,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:27,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:27,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271789269] [2020-07-21 02:23:27,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:27,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:27,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:27,360 INFO L87 Difference]: Start difference. First operand 12270 states and 18754 transitions. Second operand 3 states. [2020-07-21 02:23:28,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:28,400 INFO L93 Difference]: Finished difference Result 34366 states and 52214 transitions. [2020-07-21 02:23:28,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:28,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 339 [2020-07-21 02:23:28,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:28,429 INFO L225 Difference]: With dead ends: 34366 [2020-07-21 02:23:28,429 INFO L226 Difference]: Without dead ends: 23348 [2020-07-21 02:23:28,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:28,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23348 states. [2020-07-21 02:23:29,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23348 to 12424. [2020-07-21 02:23:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12424 states. [2020-07-21 02:23:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 18935 transitions. [2020-07-21 02:23:29,038 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 18935 transitions. Word has length 339 [2020-07-21 02:23:29,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:29,039 INFO L479 AbstractCegarLoop]: Abstraction has 12424 states and 18935 transitions. [2020-07-21 02:23:29,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 18935 transitions. [2020-07-21 02:23:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 02:23:29,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:29,050 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] [2020-07-21 02:23:29,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:29,258 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:29,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:29,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1714002818, now seen corresponding path program 1 times [2020-07-21 02:23:29,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:29,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334275863] [2020-07-21 02:23:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:29,547 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:29,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:29,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:23:29,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:29,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:29,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334275863] [2020-07-21 02:23:29,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:29,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:23:29,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669003531] [2020-07-21 02:23:29,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:23:29,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:29,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:23:29,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:29,682 INFO L87 Difference]: Start difference. First operand 12424 states and 18935 transitions. Second operand 5 states. [2020-07-21 02:23:30,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:30,600 INFO L93 Difference]: Finished difference Result 22046 states and 33624 transitions. [2020-07-21 02:23:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:23:30,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 339 [2020-07-21 02:23:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:30,619 INFO L225 Difference]: With dead ends: 22046 [2020-07-21 02:23:30,619 INFO L226 Difference]: Without dead ends: 12424 [2020-07-21 02:23:30,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:23:30,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12424 states. [2020-07-21 02:23:31,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12424 to 12424. [2020-07-21 02:23:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12424 states. [2020-07-21 02:23:31,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 18769 transitions. [2020-07-21 02:23:31,182 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 18769 transitions. Word has length 339 [2020-07-21 02:23:31,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:31,182 INFO L479 AbstractCegarLoop]: Abstraction has 12424 states and 18769 transitions. [2020-07-21 02:23:31,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:23:31,182 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 18769 transitions. [2020-07-21 02:23:31,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-21 02:23:31,190 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:31,190 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] [2020-07-21 02:23:31,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:31,396 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:31,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:31,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1394193853, now seen corresponding path program 1 times [2020-07-21 02:23:31,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:31,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688972718] [2020-07-21 02:23:31,398 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:31,684 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:31,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:31,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 1508 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:23:31,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:31,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:31,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688972718] [2020-07-21 02:23:31,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:31,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:31,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250244345] [2020-07-21 02:23:31,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:31,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:31,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:31,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:31,786 INFO L87 Difference]: Start difference. First operand 12424 states and 18769 transitions. Second operand 4 states. [2020-07-21 02:23:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:33,023 INFO L93 Difference]: Finished difference Result 35981 states and 54291 transitions. [2020-07-21 02:23:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:23:33,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2020-07-21 02:23:33,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:33,048 INFO L225 Difference]: With dead ends: 35981 [2020-07-21 02:23:33,048 INFO L226 Difference]: Without dead ends: 23899 [2020-07-21 02:23:33,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:23:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23899 states. [2020-07-21 02:23:34,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23899 to 23897. [2020-07-21 02:23:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23897 states. [2020-07-21 02:23:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23897 states to 23897 states and 35921 transitions. [2020-07-21 02:23:34,855 INFO L78 Accepts]: Start accepts. Automaton has 23897 states and 35921 transitions. Word has length 339 [2020-07-21 02:23:34,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:34,855 INFO L479 AbstractCegarLoop]: Abstraction has 23897 states and 35921 transitions. [2020-07-21 02:23:34,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:34,855 INFO L276 IsEmpty]: Start isEmpty. Operand 23897 states and 35921 transitions. [2020-07-21 02:23:34,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-21 02:23:34,868 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:34,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:35,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:35,074 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:35,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:35,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1115207281, now seen corresponding path program 1 times [2020-07-21 02:23:35,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:35,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330815043] [2020-07-21 02:23:35,076 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:35,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:23:35,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:35,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:23:35,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:35,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:35,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:35,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330815043] [2020-07-21 02:23:35,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:35,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:23:35,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870678975] [2020-07-21 02:23:35,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:23:35,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:35,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:23:35,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:23:35,402 INFO L87 Difference]: Start difference. First operand 23897 states and 35921 transitions. Second operand 4 states. [2020-07-21 02:23:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:36,595 INFO L93 Difference]: Finished difference Result 43330 states and 64956 transitions. [2020-07-21 02:23:36,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:23:36,595 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-21 02:23:36,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:36,613 INFO L225 Difference]: With dead ends: 43330 [2020-07-21 02:23:36,613 INFO L226 Difference]: Without dead ends: 21361 [2020-07-21 02:23:36,629 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 02:23:36,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21361 states. [2020-07-21 02:23:37,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21361 to 21209. [2020-07-21 02:23:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21209 states. [2020-07-21 02:23:37,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21209 states to 21209 states and 31897 transitions. [2020-07-21 02:23:37,602 INFO L78 Accepts]: Start accepts. Automaton has 21209 states and 31897 transitions. Word has length 340 [2020-07-21 02:23:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:37,602 INFO L479 AbstractCegarLoop]: Abstraction has 21209 states and 31897 transitions. [2020-07-21 02:23:37,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:23:37,603 INFO L276 IsEmpty]: Start isEmpty. Operand 21209 states and 31897 transitions. [2020-07-21 02:23:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-21 02:23:37,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:37,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:37,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:37,827 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:37,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:37,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1284341667, now seen corresponding path program 1 times [2020-07-21 02:23:37,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:37,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664671675] [2020-07-21 02:23:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:38,119 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:38,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:38,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 1511 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:38,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:38,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:38,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664671675] [2020-07-21 02:23:38,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:38,231 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:38,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816014935] [2020-07-21 02:23:38,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:38,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:38,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:38,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:38,233 INFO L87 Difference]: Start difference. First operand 21209 states and 31897 transitions. Second operand 3 states. [2020-07-21 02:23:40,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:40,169 INFO L93 Difference]: Finished difference Result 60647 states and 90926 transitions. [2020-07-21 02:23:40,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:40,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 341 [2020-07-21 02:23:40,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:40,214 INFO L225 Difference]: With dead ends: 60647 [2020-07-21 02:23:40,215 INFO L226 Difference]: Without dead ends: 40987 [2020-07-21 02:23:40,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 339 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:40,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40987 states. [2020-07-21 02:23:42,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40987 to 40985. [2020-07-21 02:23:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40985 states. [2020-07-21 02:23:42,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40985 states to 40985 states and 61292 transitions. [2020-07-21 02:23:42,465 INFO L78 Accepts]: Start accepts. Automaton has 40985 states and 61292 transitions. Word has length 341 [2020-07-21 02:23:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:42,466 INFO L479 AbstractCegarLoop]: Abstraction has 40985 states and 61292 transitions. [2020-07-21 02:23:42,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:23:42,466 INFO L276 IsEmpty]: Start isEmpty. Operand 40985 states and 61292 transitions. [2020-07-21 02:23:42,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 02:23:42,492 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:42,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:23:42,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:42,705 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:42,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:42,706 INFO L82 PathProgramCache]: Analyzing trace with hash -582489977, now seen corresponding path program 1 times [2020-07-21 02:23:42,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:42,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231245952] [2020-07-21 02:23:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:42,986 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:42,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:42,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 1461 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 02:23:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:43,138 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:43,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231245952] [2020-07-21 02:23:43,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:43,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-21 02:23:43,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833126720] [2020-07-21 02:23:43,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 02:23:43,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:43,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 02:23:43,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-07-21 02:23:43,140 INFO L87 Difference]: Start difference. First operand 40985 states and 61292 transitions. Second operand 8 states. [2020-07-21 02:23:49,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:49,440 INFO L93 Difference]: Finished difference Result 100361 states and 151936 transitions. [2020-07-21 02:23:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 02:23:49,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 342 [2020-07-21 02:23:49,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:49,529 INFO L225 Difference]: With dead ends: 100361 [2020-07-21 02:23:49,529 INFO L226 Difference]: Without dead ends: 83407 [2020-07-21 02:23:49,554 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 02:23:49,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83407 states. [2020-07-21 02:23:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83407 to 48017. [2020-07-21 02:23:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48017 states. [2020-07-21 02:23:52,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48017 states to 48017 states and 71820 transitions. [2020-07-21 02:23:52,440 INFO L78 Accepts]: Start accepts. Automaton has 48017 states and 71820 transitions. Word has length 342 [2020-07-21 02:23:52,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:23:52,440 INFO L479 AbstractCegarLoop]: Abstraction has 48017 states and 71820 transitions. [2020-07-21 02:23:52,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 02:23:52,440 INFO L276 IsEmpty]: Start isEmpty. Operand 48017 states and 71820 transitions. [2020-07-21 02:23:52,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-21 02:23:52,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:23:52,471 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 02:23:52,686 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:52,686 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:23:52,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:23:52,687 INFO L82 PathProgramCache]: Analyzing trace with hash -750406235, now seen corresponding path program 1 times [2020-07-21 02:23:52,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:23:52,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182654631] [2020-07-21 02:23:52,688 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:23:52,993 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:23:52,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:23:52,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:23:53,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:23:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:23:53,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:23:53,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182654631] [2020-07-21 02:23:53,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:23:53,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:23:53,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297353165] [2020-07-21 02:23:53,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:23:53,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:23:53,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:23:53,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:23:53,327 INFO L87 Difference]: Start difference. First operand 48017 states and 71820 transitions. Second operand 3 states. [2020-07-21 02:23:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:23:58,159 INFO L93 Difference]: Finished difference Result 105977 states and 159998 transitions. [2020-07-21 02:23:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:23:58,160 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-21 02:23:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:23:58,235 INFO L225 Difference]: With dead ends: 105977 [2020-07-21 02:23:58,235 INFO L226 Difference]: Without dead ends: 67615 [2020-07-21 02:23:58,268 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 02:23:58,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67615 states. [2020-07-21 02:24:01,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67615 to 62469. [2020-07-21 02:24:01,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62469 states. [2020-07-21 02:24:02,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62469 states to 62469 states and 94176 transitions. [2020-07-21 02:24:02,081 INFO L78 Accepts]: Start accepts. Automaton has 62469 states and 94176 transitions. Word has length 342 [2020-07-21 02:24:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:02,081 INFO L479 AbstractCegarLoop]: Abstraction has 62469 states and 94176 transitions. [2020-07-21 02:24:02,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:02,081 INFO L276 IsEmpty]: Start isEmpty. Operand 62469 states and 94176 transitions. [2020-07-21 02:24:02,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-07-21 02:24:02,104 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:02,104 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] [2020-07-21 02:24:02,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:02,310 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:02,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash 199127432, now seen corresponding path program 1 times [2020-07-21 02:24:02,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:02,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613213459] [2020-07-21 02:24:02,311 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:02,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:02,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:02,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:24:02,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:02,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:02,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:02,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613213459] [2020-07-21 02:24:02,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:02,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:02,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723134890] [2020-07-21 02:24:02,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:02,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:02,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:02,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:02,615 INFO L87 Difference]: Start difference. First operand 62469 states and 94176 transitions. Second operand 4 states. [2020-07-21 02:24:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:08,194 INFO L93 Difference]: Finished difference Result 130525 states and 196348 transitions. [2020-07-21 02:24:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:08,194 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 343 [2020-07-21 02:24:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:08,270 INFO L225 Difference]: With dead ends: 130525 [2020-07-21 02:24:08,271 INFO L226 Difference]: Without dead ends: 65853 [2020-07-21 02:24:08,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65853 states. [2020-07-21 02:24:12,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65853 to 65851. [2020-07-21 02:24:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65851 states. [2020-07-21 02:24:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65851 states to 65851 states and 98622 transitions. [2020-07-21 02:24:12,376 INFO L78 Accepts]: Start accepts. Automaton has 65851 states and 98622 transitions. Word has length 343 [2020-07-21 02:24:12,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:12,376 INFO L479 AbstractCegarLoop]: Abstraction has 65851 states and 98622 transitions. [2020-07-21 02:24:12,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:24:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 65851 states and 98622 transitions. [2020-07-21 02:24:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-21 02:24:12,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:12,402 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 02:24:12,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:12,603 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:12,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:12,604 INFO L82 PathProgramCache]: Analyzing trace with hash 744777186, now seen corresponding path program 1 times [2020-07-21 02:24:12,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:12,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890775796] [2020-07-21 02:24:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:13,143 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:13,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:13,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1464 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:24:13,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:13,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:13,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890775796] [2020-07-21 02:24:13,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:13,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 02:24:13,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175617511] [2020-07-21 02:24:13,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 02:24:13,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:13,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 02:24:13,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:13,259 INFO L87 Difference]: Start difference. First operand 65851 states and 98622 transitions. Second operand 5 states. [2020-07-21 02:24:17,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:17,770 INFO L93 Difference]: Finished difference Result 118721 states and 178553 transitions. [2020-07-21 02:24:17,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 02:24:17,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 345 [2020-07-21 02:24:17,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:17,861 INFO L225 Difference]: With dead ends: 118721 [2020-07-21 02:24:17,862 INFO L226 Difference]: Without dead ends: 65851 [2020-07-21 02:24:17,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-07-21 02:24:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65851 states. [2020-07-21 02:24:23,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65851 to 65851. [2020-07-21 02:24:23,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65851 states. [2020-07-21 02:24:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65851 states to 65851 states and 97830 transitions. [2020-07-21 02:24:23,890 INFO L78 Accepts]: Start accepts. Automaton has 65851 states and 97830 transitions. Word has length 345 [2020-07-21 02:24:23,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:23,891 INFO L479 AbstractCegarLoop]: Abstraction has 65851 states and 97830 transitions. [2020-07-21 02:24:23,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 02:24:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 65851 states and 97830 transitions. [2020-07-21 02:24:23,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-21 02:24:23,918 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:23,918 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 02:24:24,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:24,119 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:24,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:24,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1123136925, now seen corresponding path program 1 times [2020-07-21 02:24:24,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:24,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093023647] [2020-07-21 02:24:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:24,378 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:24:24,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:24,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:24:24,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:24,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:24,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093023647] [2020-07-21 02:24:24,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:24,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:24:24,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756747440] [2020-07-21 02:24:24,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:24:24,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:24,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:24:24,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:24:24,495 INFO L87 Difference]: Start difference. First operand 65851 states and 97830 transitions. Second operand 3 states. [2020-07-21 02:24:34,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:34,328 INFO L93 Difference]: Finished difference Result 190835 states and 283357 transitions. [2020-07-21 02:24:34,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:24:34,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 345 [2020-07-21 02:24:34,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:34,483 INFO L225 Difference]: With dead ends: 190835 [2020-07-21 02:24:34,483 INFO L226 Difference]: Without dead ends: 128218 [2020-07-21 02:24:34,540 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 02:24:34,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128218 states. [2020-07-21 02:24:43,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128218 to 128216. [2020-07-21 02:24:43,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128216 states. [2020-07-21 02:24:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128216 states to 128216 states and 189759 transitions. [2020-07-21 02:24:43,225 INFO L78 Accepts]: Start accepts. Automaton has 128216 states and 189759 transitions. Word has length 345 [2020-07-21 02:24:43,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:24:43,226 INFO L479 AbstractCegarLoop]: Abstraction has 128216 states and 189759 transitions. [2020-07-21 02:24:43,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:24:43,226 INFO L276 IsEmpty]: Start isEmpty. Operand 128216 states and 189759 transitions. [2020-07-21 02:24:43,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-21 02:24:43,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:24:43,278 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 02:24:43,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:43,485 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:24:43,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:24:43,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1726862816, now seen corresponding path program 1 times [2020-07-21 02:24:43,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:24:43,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1061572988] [2020-07-21 02:24:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:24:43,725 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:24:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:24:43,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1173 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:24:43,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:24:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:24:43,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:24:43,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1061572988] [2020-07-21 02:24:43,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:24:43,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:24:43,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461511272] [2020-07-21 02:24:43,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:24:43,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:24:43,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:24:43,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:24:43,797 INFO L87 Difference]: Start difference. First operand 128216 states and 189759 transitions. Second operand 4 states. [2020-07-21 02:24:59,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:24:59,134 INFO L93 Difference]: Finished difference Result 312790 states and 461533 transitions. [2020-07-21 02:24:59,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:24:59,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 345 [2020-07-21 02:24:59,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:24:59,415 INFO L225 Difference]: With dead ends: 312790 [2020-07-21 02:24:59,415 INFO L226 Difference]: Without dead ends: 200622 [2020-07-21 02:24:59,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:24:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200622 states. [2020-07-21 02:25:12,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200622 to 125789. [2020-07-21 02:25:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125789 states. [2020-07-21 02:25:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125789 states to 125789 states and 186024 transitions. [2020-07-21 02:25:12,787 INFO L78 Accepts]: Start accepts. Automaton has 125789 states and 186024 transitions. Word has length 345 [2020-07-21 02:25:12,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:12,787 INFO L479 AbstractCegarLoop]: Abstraction has 125789 states and 186024 transitions. [2020-07-21 02:25:12,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:25:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 125789 states and 186024 transitions. [2020-07-21 02:25:12,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-21 02:25:12,846 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:12,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:25:13,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:13,047 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:13,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:13,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1443930571, now seen corresponding path program 1 times [2020-07-21 02:25:13,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:13,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505226451] [2020-07-21 02:25:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:13,339 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:25:13,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:13,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1516 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:25:13,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:25:13,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:13,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505226451] [2020-07-21 02:25:13,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:13,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:25:13,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761779329] [2020-07-21 02:25:13,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:25:13,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:13,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:25:13,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:13,422 INFO L87 Difference]: Start difference. First operand 125789 states and 186024 transitions. Second operand 3 states. [2020-07-21 02:25:28,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:25:28,701 INFO L93 Difference]: Finished difference Result 310699 states and 464821 transitions. [2020-07-21 02:25:28,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:25:28,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 347 [2020-07-21 02:25:28,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:25:29,031 INFO L225 Difference]: With dead ends: 310699 [2020-07-21 02:25:29,031 INFO L226 Difference]: Without dead ends: 207057 [2020-07-21 02:25:29,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:29,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207057 states. [2020-07-21 02:25:47,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207057 to 184179. [2020-07-21 02:25:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184179 states. [2020-07-21 02:25:47,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184179 states to 184179 states and 277793 transitions. [2020-07-21 02:25:47,627 INFO L78 Accepts]: Start accepts. Automaton has 184179 states and 277793 transitions. Word has length 347 [2020-07-21 02:25:47,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:25:47,627 INFO L479 AbstractCegarLoop]: Abstraction has 184179 states and 277793 transitions. [2020-07-21 02:25:47,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:25:47,628 INFO L276 IsEmpty]: Start isEmpty. Operand 184179 states and 277793 transitions. [2020-07-21 02:25:47,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-21 02:25:47,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:25:47,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:25:47,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:47,877 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:25:47,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:25:47,878 INFO L82 PathProgramCache]: Analyzing trace with hash 99033064, now seen corresponding path program 1 times [2020-07-21 02:25:47,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:25:47,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512937035] [2020-07-21 02:25:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:25:48,125 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:25:48,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:25:48,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:25:48,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:25:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:25:48,184 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:25:48,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512937035] [2020-07-21 02:25:48,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:25:48,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:25:48,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546243516] [2020-07-21 02:25:48,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:25:48,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:25:48,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:25:48,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:25:48,186 INFO L87 Difference]: Start difference. First operand 184179 states and 277793 transitions. Second operand 3 states. [2020-07-21 02:26:16,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:26:16,721 INFO L93 Difference]: Finished difference Result 499765 states and 753272 transitions. [2020-07-21 02:26:16,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:26:16,721 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 348 [2020-07-21 02:26:16,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:26:17,241 INFO L225 Difference]: With dead ends: 499765 [2020-07-21 02:26:17,241 INFO L226 Difference]: Without dead ends: 326755 [2020-07-21 02:26:17,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:26:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326755 states. [2020-07-21 02:26:39,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326755 to 184674. [2020-07-21 02:26:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184674 states. [2020-07-21 02:26:39,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184674 states to 184674 states and 278323 transitions. [2020-07-21 02:26:39,785 INFO L78 Accepts]: Start accepts. Automaton has 184674 states and 278323 transitions. Word has length 348 [2020-07-21 02:26:39,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:26:39,785 INFO L479 AbstractCegarLoop]: Abstraction has 184674 states and 278323 transitions. [2020-07-21 02:26:39,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:26:39,785 INFO L276 IsEmpty]: Start isEmpty. Operand 184674 states and 278323 transitions. [2020-07-21 02:26:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-21 02:26:39,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:26:39,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:26:40,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:26:40,033 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:26:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:26:40,034 INFO L82 PathProgramCache]: Analyzing trace with hash -648243640, now seen corresponding path program 1 times [2020-07-21 02:26:40,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:26:40,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599807428] [2020-07-21 02:26:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:26:40,328 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:26:40,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:26:40,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:26:40,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:26:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:26:40,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:26:40,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599807428] [2020-07-21 02:26:40,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:26:40,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:26:40,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297542116] [2020-07-21 02:26:40,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:26:40,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:26:40,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:26:40,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:26:40,798 INFO L87 Difference]: Start difference. First operand 184674 states and 278323 transitions. Second operand 4 states. [2020-07-21 02:27:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:27:14,004 INFO L93 Difference]: Finished difference Result 530212 states and 799718 transitions. [2020-07-21 02:27:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:27:14,004 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 348 [2020-07-21 02:27:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:27:14,483 INFO L225 Difference]: With dead ends: 530212 [2020-07-21 02:27:14,484 INFO L226 Difference]: Without dead ends: 345787 [2020-07-21 02:27:14,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:27:14,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345787 states. [2020-07-21 02:27:49,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345787 to 345785. [2020-07-21 02:27:49,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345785 states. [2020-07-21 02:27:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345785 states to 345785 states and 518748 transitions. [2020-07-21 02:27:49,878 INFO L78 Accepts]: Start accepts. Automaton has 345785 states and 518748 transitions. Word has length 348 [2020-07-21 02:27:49,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:27:49,878 INFO L479 AbstractCegarLoop]: Abstraction has 345785 states and 518748 transitions. [2020-07-21 02:27:49,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:27:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 345785 states and 518748 transitions. [2020-07-21 02:27:49,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-07-21 02:27:49,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:27:49,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:27:50,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:50,187 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:27:50,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:27:50,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1344556059, now seen corresponding path program 1 times [2020-07-21 02:27:50,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:27:50,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000217195] [2020-07-21 02:27:50,188 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:27:50,480 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 02:27:50,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:27:50,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 1475 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-21 02:27:50,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:27:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:27:50,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:27:50,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000217195] [2020-07-21 02:27:50,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:27:50,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 02:27:50,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625117868] [2020-07-21 02:27:50,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 02:27:50,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:27:50,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 02:27:50,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:27:50,611 INFO L87 Difference]: Start difference. First operand 345785 states and 518748 transitions. Second operand 3 states. [2020-07-21 02:28:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:28:59,826 INFO L93 Difference]: Finished difference Result 1014187 states and 1521881 transitions. [2020-07-21 02:28:59,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 02:28:59,826 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 350 [2020-07-21 02:28:59,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:29:00,912 INFO L225 Difference]: With dead ends: 1014187 [2020-07-21 02:29:00,913 INFO L226 Difference]: Without dead ends: 678150 [2020-07-21 02:29:01,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 02:29:01,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678150 states. [2020-07-21 02:30:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678150 to 677888. [2020-07-21 02:30:18,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677888 states. [2020-07-21 02:30:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677888 states to 677888 states and 1012966 transitions. [2020-07-21 02:30:19,973 INFO L78 Accepts]: Start accepts. Automaton has 677888 states and 1012966 transitions. Word has length 350 [2020-07-21 02:30:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:30:19,973 INFO L479 AbstractCegarLoop]: Abstraction has 677888 states and 1012966 transitions. [2020-07-21 02:30:19,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 02:30:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 677888 states and 1012966 transitions. [2020-07-21 02:30:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 02:30:20,147 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:30:20,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:30:20,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:20,356 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:30:20,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:30:20,357 INFO L82 PathProgramCache]: Analyzing trace with hash 855420753, now seen corresponding path program 1 times [2020-07-21 02:30:20,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:30:20,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393686806] [2020-07-21 02:30:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:30:20,609 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:30:20,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:30:20,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 1182 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 02:30:20,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:30:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:30:20,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:30:20,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393686806] [2020-07-21 02:30:20,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:30:20,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:30:20,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754180502] [2020-07-21 02:30:20,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:30:20,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:30:20,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:30:20,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:30:20,682 INFO L87 Difference]: Start difference. First operand 677888 states and 1012966 transitions. Second operand 4 states. [2020-07-21 02:32:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 02:32:27,280 INFO L93 Difference]: Finished difference Result 1788793 states and 2670017 transitions. [2020-07-21 02:32:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 02:32:27,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 351 [2020-07-21 02:32:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 02:32:29,158 INFO L225 Difference]: With dead ends: 1788793 [2020-07-21 02:32:29,158 INFO L226 Difference]: Without dead ends: 1132175 [2020-07-21 02:32:29,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-21 02:32:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132175 states. [2020-07-21 02:33:51,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132175 to 650413. [2020-07-21 02:33:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650413 states. [2020-07-21 02:33:52,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650413 states to 650413 states and 971818 transitions. [2020-07-21 02:33:52,962 INFO L78 Accepts]: Start accepts. Automaton has 650413 states and 971818 transitions. Word has length 351 [2020-07-21 02:33:52,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 02:33:52,962 INFO L479 AbstractCegarLoop]: Abstraction has 650413 states and 971818 transitions. [2020-07-21 02:33:52,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 02:33:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 650413 states and 971818 transitions. [2020-07-21 02:33:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-07-21 02:33:53,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 02:33:53,130 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 02:33:53,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:53,331 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 02:33:53,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 02:33:53,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2131061472, now seen corresponding path program 1 times [2020-07-21 02:33:53,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 02:33:53,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109607386] [2020-07-21 02:33:53,332 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 02:33:53,585 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 02:33:53,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 02:33:53,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 02:33:53,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 02:33:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 02:33:53,680 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 02:33:53,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109607386] [2020-07-21 02:33:53,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 02:33:53,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 02:33:53,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452949440] [2020-07-21 02:33:53,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 02:33:53,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 02:33:53,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 02:33:53,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-21 02:33:53,684 INFO L87 Difference]: Start difference. First operand 650413 states and 971818 transitions. Second operand 4 states.