/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 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 [2020-07-20 15:06:17,964 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 15:06:17,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 15:06:17,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 15:06:17,985 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 15:06:17,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 15:06:17,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 15:06:17,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 15:06:18,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 15:06:18,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 15:06:18,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 15:06:18,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 15:06:18,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 15:06:18,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 15:06:18,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 15:06:18,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 15:06:18,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 15:06:18,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 15:06:18,019 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 15:06:18,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 15:06:18,028 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 15:06:18,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 15:06:18,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 15:06:18,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 15:06:18,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 15:06:18,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 15:06:18,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 15:06:18,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 15:06:18,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 15:06:18,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 15:06:18,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 15:06:18,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 15:06:18,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 15:06:18,042 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 15:06:18,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 15:06:18,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 15:06:18,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 15:06:18,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 15:06:18,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 15:06:18,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 15:06:18,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 15:06:18,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 15:06:18,082 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 15:06:18,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 15:06:18,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 15:06:18,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 15:06:18,084 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 15:06:18,084 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 15:06:18,084 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 15:06:18,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 15:06:18,087 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 15:06:18,087 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 15:06:18,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 15:06:18,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 15:06:18,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 15:06:18,087 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 15:06:18,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 15:06:18,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 15:06:18,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 15:06:18,089 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 15:06:18,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 15:06:18,090 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 15:06:18,090 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 15:06:18,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:06:18,090 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 15:06:18,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 15:06:18,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 15:06:18,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 15:06:18,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:18,092 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 15:06:18,092 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 15:06:18,092 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 15:06:18,361 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 15:06:18,375 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 15:06:18,378 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 15:06:18,380 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 15:06:18,380 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 15:06:18,381 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 15:06:18,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7350c7e/d51aa44d08734873b03740b73c858bfd/FLAGdccd39606 [2020-07-20 15:06:19,057 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 15:06:19,057 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 15:06:19,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7350c7e/d51aa44d08734873b03740b73c858bfd/FLAGdccd39606 [2020-07-20 15:06:19,233 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa7350c7e/d51aa44d08734873b03740b73c858bfd [2020-07-20 15:06:19,242 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 15:06:19,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 15:06:19,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 15:06:19,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 15:06:19,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 15:06:19,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:06:19" (1/1) ... [2020-07-20 15:06:19,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65695003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:06:19, skipping insertion in model container [2020-07-20 15:06:19,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:06:19" (1/1) ... [2020-07-20 15:06:19,266 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 15:06:19,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 15:06:20,311 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:06:20,324 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 15:06:21,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 15:06:21,355 INFO L208 MainTranslator]: Completed translation [2020-07-20 15:06:21,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:06:21 WrapperNode [2020-07-20 15:06:21,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 15:06:21,357 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 15:06:21,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 15:06:21,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 15:06:21,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:06:21" (1/1) ... [2020-07-20 15:06:21,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:06:21" (1/1) ... [2020-07-20 15:06:21,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:06:21" (1/1) ... [2020-07-20 15:06:21,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:06:21" (1/1) ... [2020-07-20 15:06:21,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:06:21" (1/1) ... [2020-07-20 15:06:21,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:06:21" (1/1) ... [2020-07-20 15:06:21,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:06:21" (1/1) ... [2020-07-20 15:06:21,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 15:06:21,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 15:06:21,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 15:06:21,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 15:06:21,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:06:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 15:06:21,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 15:06:21,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 15:06:21,614 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 15:06:21,614 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 15:06:21,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 15:06:21,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-07-20 15:06:21,614 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-07-20 15:06:21,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-07-20 15:06:21,615 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-07-20 15:06:21,615 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 15:06:21,615 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 15:06:21,615 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-07-20 15:06:21,616 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-07-20 15:06:21,616 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-07-20 15:06:21,616 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-07-20 15:06:21,616 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-07-20 15:06:21,617 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-07-20 15:06:21,617 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-07-20 15:06:21,617 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 15:06:21,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 15:06:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 15:06:21,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 15:06:24,338 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 15:06:24,338 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 15:06:24,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:06:24 BoogieIcfgContainer [2020-07-20 15:06:24,349 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 15:06:24,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 15:06:24,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 15:06:24,353 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 15:06:24,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:06:19" (1/3) ... [2020-07-20 15:06:24,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1c48df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:06:24, skipping insertion in model container [2020-07-20 15:06:24,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:06:21" (2/3) ... [2020-07-20 15:06:24,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e1c48df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:06:24, skipping insertion in model container [2020-07-20 15:06:24,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:06:24" (3/3) ... [2020-07-20 15:06:24,357 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-07-20 15:06:24,368 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 15:06:24,377 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 15:06:24,391 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 15:06:24,421 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 15:06:24,421 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 15:06:24,421 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 15:06:24,422 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 15:06:24,422 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 15:06:24,422 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 15:06:24,422 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 15:06:24,422 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 15:06:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states. [2020-07-20 15:06:24,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-20 15:06:24,499 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:24,500 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] [2020-07-20 15:06:24,501 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:24,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:24,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times [2020-07-20 15:06:24,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:24,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269729735] [2020-07-20 15:06:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:24,945 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:06:24,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:24,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:06:24,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:25,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:25,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269729735] [2020-07-20 15:06:25,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:25,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:25,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463809166] [2020-07-20 15:06:25,296 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:25,296 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:25,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:25,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:25,314 INFO L87 Difference]: Start difference. First operand 808 states. Second operand 4 states. [2020-07-20 15:06:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:25,676 INFO L93 Difference]: Finished difference Result 2367 states and 4203 transitions. [2020-07-20 15:06:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 15:06:25,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-07-20 15:06:25,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:25,708 INFO L225 Difference]: With dead ends: 2367 [2020-07-20 15:06:25,708 INFO L226 Difference]: Without dead ends: 1568 [2020-07-20 15:06:25,718 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 [2020-07-20 15:06:25,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2020-07-20 15:06:25,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1566. [2020-07-20 15:06:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1566 states. [2020-07-20 15:06:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 2429 transitions. [2020-07-20 15:06:25,882 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 2429 transitions. Word has length 330 [2020-07-20 15:06:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:25,885 INFO L479 AbstractCegarLoop]: Abstraction has 1566 states and 2429 transitions. [2020-07-20 15:06:25,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:25,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 2429 transitions. [2020-07-20 15:06:25,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-20 15:06:25,898 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:25,899 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] [2020-07-20 15:06:26,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:26,113 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:26,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1958326031, now seen corresponding path program 1 times [2020-07-20 15:06:26,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:26,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919840753] [2020-07-20 15:06:26,115 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:26,503 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:06:26,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:26,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:06:26,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:26,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:26,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919840753] [2020-07-20 15:06:26,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:26,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:26,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248661723] [2020-07-20 15:06:26,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:26,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:26,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:26,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:26,752 INFO L87 Difference]: Start difference. First operand 1566 states and 2429 transitions. Second operand 4 states. [2020-07-20 15:06:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:26,983 INFO L93 Difference]: Finished difference Result 4552 states and 7042 transitions. [2020-07-20 15:06:26,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:26,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-07-20 15:06:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:27,000 INFO L225 Difference]: With dead ends: 4552 [2020-07-20 15:06:27,000 INFO L226 Difference]: Without dead ends: 3036 [2020-07-20 15:06:27,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3036 states. [2020-07-20 15:06:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3036 to 3034. [2020-07-20 15:06:27,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3034 states. [2020-07-20 15:06:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3034 states to 3034 states and 4668 transitions. [2020-07-20 15:06:27,133 INFO L78 Accepts]: Start accepts. Automaton has 3034 states and 4668 transitions. Word has length 332 [2020-07-20 15:06:27,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:27,134 INFO L479 AbstractCegarLoop]: Abstraction has 3034 states and 4668 transitions. [2020-07-20 15:06:27,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:27,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3034 states and 4668 transitions. [2020-07-20 15:06:27,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-07-20 15:06:27,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:27,147 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] [2020-07-20 15:06:27,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:27,360 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1210674357, now seen corresponding path program 1 times [2020-07-20 15:06:27,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:27,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074956215] [2020-07-20 15:06:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:27,683 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:06:27,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:27,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:06:27,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:27,826 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:27,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074956215] [2020-07-20 15:06:27,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:27,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:27,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389827552] [2020-07-20 15:06:27,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:27,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:27,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:27,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:27,830 INFO L87 Difference]: Start difference. First operand 3034 states and 4668 transitions. Second operand 4 states. [2020-07-20 15:06:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:28,206 INFO L93 Difference]: Finished difference Result 8969 states and 13786 transitions. [2020-07-20 15:06:28,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:28,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-07-20 15:06:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:28,238 INFO L225 Difference]: With dead ends: 8969 [2020-07-20 15:06:28,238 INFO L226 Difference]: Without dead ends: 5955 [2020-07-20 15:06:28,246 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 [2020-07-20 15:06:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5955 states. [2020-07-20 15:06:28,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5955 to 5953. [2020-07-20 15:06:28,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5953 states. [2020-07-20 15:06:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5953 states to 5953 states and 9098 transitions. [2020-07-20 15:06:28,499 INFO L78 Accepts]: Start accepts. Automaton has 5953 states and 9098 transitions. Word has length 334 [2020-07-20 15:06:28,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:28,499 INFO L479 AbstractCegarLoop]: Abstraction has 5953 states and 9098 transitions. [2020-07-20 15:06:28,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 5953 states and 9098 transitions. [2020-07-20 15:06:28,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-07-20 15:06:28,515 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:28,516 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] [2020-07-20 15:06:28,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:28,730 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:28,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:28,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1763216307, now seen corresponding path program 1 times [2020-07-20 15:06:28,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:28,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994637600] [2020-07-20 15:06:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:28,967 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:28,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:28,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:28,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:29,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:29,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994637600] [2020-07-20 15:06:29,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:29,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:29,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208529874] [2020-07-20 15:06:29,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:29,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:29,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:29,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:29,121 INFO L87 Difference]: Start difference. First operand 5953 states and 9098 transitions. Second operand 3 states. [2020-07-20 15:06:29,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:29,457 INFO L93 Difference]: Finished difference Result 17815 states and 27228 transitions. [2020-07-20 15:06:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:06:29,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-07-20 15:06:29,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:29,513 INFO L225 Difference]: With dead ends: 17815 [2020-07-20 15:06:29,513 INFO L226 Difference]: Without dead ends: 11880 [2020-07-20 15:06:29,528 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 [2020-07-20 15:06:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11880 states. [2020-07-20 15:06:29,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11880 to 5968. [2020-07-20 15:06:29,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5968 states. [2020-07-20 15:06:29,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5968 states to 5968 states and 9119 transitions. [2020-07-20 15:06:29,964 INFO L78 Accepts]: Start accepts. Automaton has 5968 states and 9119 transitions. Word has length 336 [2020-07-20 15:06:29,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:29,964 INFO L479 AbstractCegarLoop]: Abstraction has 5968 states and 9119 transitions. [2020-07-20 15:06:29,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:06:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 5968 states and 9119 transitions. [2020-07-20 15:06:29,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-20 15:06:29,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:29,983 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] [2020-07-20 15:06:30,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:30,197 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:30,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1274994967, now seen corresponding path program 1 times [2020-07-20 15:06:30,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:30,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092877688] [2020-07-20 15:06:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:30,477 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:06:30,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:30,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:06:30,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:30,621 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:30,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092877688] [2020-07-20 15:06:30,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:30,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:30,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157871924] [2020-07-20 15:06:30,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:30,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:30,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:30,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:30,625 INFO L87 Difference]: Start difference. First operand 5968 states and 9119 transitions. Second operand 4 states. [2020-07-20 15:06:31,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:31,279 INFO L93 Difference]: Finished difference Result 17374 states and 26465 transitions. [2020-07-20 15:06:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:31,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 337 [2020-07-20 15:06:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:31,315 INFO L225 Difference]: With dead ends: 17374 [2020-07-20 15:06:31,315 INFO L226 Difference]: Without dead ends: 11680 [2020-07-20 15:06:31,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 334 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11680 states. [2020-07-20 15:06:31,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11680 to 11678. [2020-07-20 15:06:31,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11678 states. [2020-07-20 15:06:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11678 states to 11678 states and 17723 transitions. [2020-07-20 15:06:31,802 INFO L78 Accepts]: Start accepts. Automaton has 11678 states and 17723 transitions. Word has length 337 [2020-07-20 15:06:31,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:31,803 INFO L479 AbstractCegarLoop]: Abstraction has 11678 states and 17723 transitions. [2020-07-20 15:06:31,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:31,803 INFO L276 IsEmpty]: Start isEmpty. Operand 11678 states and 17723 transitions. [2020-07-20 15:06:31,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-07-20 15:06:31,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:31,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:32,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:32,045 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:32,045 INFO L82 PathProgramCache]: Analyzing trace with hash -927576035, now seen corresponding path program 1 times [2020-07-20 15:06:32,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:32,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911289687] [2020-07-20 15:06:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:32,277 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:32,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:32,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:06:32,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:32,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:32,463 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:32,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911289687] [2020-07-20 15:06:32,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:32,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:32,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474731877] [2020-07-20 15:06:32,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:32,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:32,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:32,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:32,465 INFO L87 Difference]: Start difference. First operand 11678 states and 17723 transitions. Second operand 4 states. [2020-07-20 15:06:33,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:33,194 INFO L93 Difference]: Finished difference Result 32621 states and 49259 transitions. [2020-07-20 15:06:33,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:33,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 338 [2020-07-20 15:06:33,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:33,250 INFO L225 Difference]: With dead ends: 32621 [2020-07-20 15:06:33,250 INFO L226 Difference]: Without dead ends: 21883 [2020-07-20 15:06:33,280 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:33,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21883 states. [2020-07-20 15:06:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21883 to 12555. [2020-07-20 15:06:33,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12555 states. [2020-07-20 15:06:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12555 states to 12555 states and 19191 transitions. [2020-07-20 15:06:34,029 INFO L78 Accepts]: Start accepts. Automaton has 12555 states and 19191 transitions. Word has length 338 [2020-07-20 15:06:34,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:34,030 INFO L479 AbstractCegarLoop]: Abstraction has 12555 states and 19191 transitions. [2020-07-20 15:06:34,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:34,030 INFO L276 IsEmpty]: Start isEmpty. Operand 12555 states and 19191 transitions. [2020-07-20 15:06:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2020-07-20 15:06:34,052 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:34,052 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:34,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:34,266 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:34,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:34,266 INFO L82 PathProgramCache]: Analyzing trace with hash -90499940, now seen corresponding path program 1 times [2020-07-20 15:06:34,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:34,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299836453] [2020-07-20 15:06:34,268 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:34,496 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:34,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:34,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:06:34,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:34,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:34,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299836453] [2020-07-20 15:06:34,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:34,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:34,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518501119] [2020-07-20 15:06:34,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:34,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:34,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:34,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:34,596 INFO L87 Difference]: Start difference. First operand 12555 states and 19191 transitions. Second operand 4 states. [2020-07-20 15:06:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:35,506 INFO L93 Difference]: Finished difference Result 34258 states and 51993 transitions. [2020-07-20 15:06:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:35,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 340 [2020-07-20 15:06:35,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:35,548 INFO L225 Difference]: With dead ends: 34258 [2020-07-20 15:06:35,548 INFO L226 Difference]: Without dead ends: 23348 [2020-07-20 15:06:35,576 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 [2020-07-20 15:06:35,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23348 states. [2020-07-20 15:06:37,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23348 to 14048. [2020-07-20 15:06:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14048 states. [2020-07-20 15:06:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14048 states to 14048 states and 21669 transitions. [2020-07-20 15:06:37,054 INFO L78 Accepts]: Start accepts. Automaton has 14048 states and 21669 transitions. Word has length 340 [2020-07-20 15:06:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:37,055 INFO L479 AbstractCegarLoop]: Abstraction has 14048 states and 21669 transitions. [2020-07-20 15:06:37,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 14048 states and 21669 transitions. [2020-07-20 15:06:37,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 15:06:37,082 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:37,083 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] [2020-07-20 15:06:37,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:37,297 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:37,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:37,298 INFO L82 PathProgramCache]: Analyzing trace with hash -488597854, now seen corresponding path program 1 times [2020-07-20 15:06:37,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:37,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332985388] [2020-07-20 15:06:37,299 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:37,524 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:37,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:37,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 966 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:37,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:37,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:37,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332985388] [2020-07-20 15:06:37,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:37,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:37,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283338756] [2020-07-20 15:06:37,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:37,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:37,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:37,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:37,605 INFO L87 Difference]: Start difference. First operand 14048 states and 21669 transitions. Second operand 3 states. [2020-07-20 15:06:38,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:38,317 INFO L93 Difference]: Finished difference Result 35796 states and 54199 transitions. [2020-07-20 15:06:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:06:38,317 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-20 15:06:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:38,352 INFO L225 Difference]: With dead ends: 35796 [2020-07-20 15:06:38,353 INFO L226 Difference]: Without dead ends: 24956 [2020-07-20 15:06:38,374 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 [2020-07-20 15:06:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24956 states. [2020-07-20 15:06:38,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24956 to 14410. [2020-07-20 15:06:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14410 states. [2020-07-20 15:06:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14410 states to 14410 states and 22111 transitions. [2020-07-20 15:06:38,914 INFO L78 Accepts]: Start accepts. Automaton has 14410 states and 22111 transitions. Word has length 342 [2020-07-20 15:06:38,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:38,914 INFO L479 AbstractCegarLoop]: Abstraction has 14410 states and 22111 transitions. [2020-07-20 15:06:38,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:06:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 14410 states and 22111 transitions. [2020-07-20 15:06:38,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-07-20 15:06:38,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:38,931 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] [2020-07-20 15:06:39,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:39,132 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:39,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:39,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1205151862, now seen corresponding path program 1 times [2020-07-20 15:06:39,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:39,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107485125] [2020-07-20 15:06:39,134 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:39,388 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:06:39,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:39,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:39,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:39,493 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:39,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107485125] [2020-07-20 15:06:39,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:39,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:39,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207881573] [2020-07-20 15:06:39,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:39,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:39,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:39,497 INFO L87 Difference]: Start difference. First operand 14410 states and 22111 transitions. Second operand 3 states. [2020-07-20 15:06:40,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:40,127 INFO L93 Difference]: Finished difference Result 26360 states and 40387 transitions. [2020-07-20 15:06:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:06:40,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 342 [2020-07-20 15:06:40,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:40,151 INFO L225 Difference]: With dead ends: 26360 [2020-07-20 15:06:40,151 INFO L226 Difference]: Without dead ends: 18608 [2020-07-20 15:06:40,166 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 [2020-07-20 15:06:40,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18608 states. [2020-07-20 15:06:40,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18608 to 16191. [2020-07-20 15:06:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16191 states. [2020-07-20 15:06:40,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16191 states to 16191 states and 25026 transitions. [2020-07-20 15:06:40,907 INFO L78 Accepts]: Start accepts. Automaton has 16191 states and 25026 transitions. Word has length 342 [2020-07-20 15:06:40,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:40,908 INFO L479 AbstractCegarLoop]: Abstraction has 16191 states and 25026 transitions. [2020-07-20 15:06:40,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:06:40,908 INFO L276 IsEmpty]: Start isEmpty. Operand 16191 states and 25026 transitions. [2020-07-20 15:06:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-20 15:06:40,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:40,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:41,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:41,124 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:41,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:41,127 INFO L82 PathProgramCache]: Analyzing trace with hash 499919230, now seen corresponding path program 1 times [2020-07-20 15:06:41,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:41,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593342544] [2020-07-20 15:06:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:41,349 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:41,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:41,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:06:41,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:41,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:41,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593342544] [2020-07-20 15:06:41,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:41,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:41,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615246838] [2020-07-20 15:06:41,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:41,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:41,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:41,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:41,435 INFO L87 Difference]: Start difference. First operand 16191 states and 25026 transitions. Second operand 4 states. [2020-07-20 15:06:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:42,309 INFO L93 Difference]: Finished difference Result 42745 states and 65564 transitions. [2020-07-20 15:06:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:42,310 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-20 15:06:42,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:42,369 INFO L225 Difference]: With dead ends: 42745 [2020-07-20 15:06:42,369 INFO L226 Difference]: Without dead ends: 29810 [2020-07-20 15:06:42,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:42,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29810 states. [2020-07-20 15:06:43,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29810 to 18117. [2020-07-20 15:06:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18117 states. [2020-07-20 15:06:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18117 states to 18117 states and 28278 transitions. [2020-07-20 15:06:43,811 INFO L78 Accepts]: Start accepts. Automaton has 18117 states and 28278 transitions. Word has length 344 [2020-07-20 15:06:43,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:43,812 INFO L479 AbstractCegarLoop]: Abstraction has 18117 states and 28278 transitions. [2020-07-20 15:06:43,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:43,812 INFO L276 IsEmpty]: Start isEmpty. Operand 18117 states and 28278 transitions. [2020-07-20 15:06:43,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2020-07-20 15:06:43,826 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:43,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:44,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:44,034 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:44,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2057339168, now seen corresponding path program 1 times [2020-07-20 15:06:44,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:44,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361995957] [2020-07-20 15:06:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:44,286 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:06:44,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:44,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 1123 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:06:44,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:44,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:44,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361995957] [2020-07-20 15:06:44,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:44,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:06:44,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993749373] [2020-07-20 15:06:44,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:06:44,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:44,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:06:44,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:06:44,366 INFO L87 Difference]: Start difference. First operand 18117 states and 28278 transitions. Second operand 4 states. [2020-07-20 15:06:45,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:45,036 INFO L93 Difference]: Finished difference Result 29980 states and 46228 transitions. [2020-07-20 15:06:45,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:06:45,037 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 344 [2020-07-20 15:06:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:45,062 INFO L225 Difference]: With dead ends: 29980 [2020-07-20 15:06:45,062 INFO L226 Difference]: Without dead ends: 16045 [2020-07-20 15:06:45,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:06:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16045 states. [2020-07-20 15:06:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16045 to 16045. [2020-07-20 15:06:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16045 states. [2020-07-20 15:06:45,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16045 states to 16045 states and 24934 transitions. [2020-07-20 15:06:45,683 INFO L78 Accepts]: Start accepts. Automaton has 16045 states and 24934 transitions. Word has length 344 [2020-07-20 15:06:45,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:45,684 INFO L479 AbstractCegarLoop]: Abstraction has 16045 states and 24934 transitions. [2020-07-20 15:06:45,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:06:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 16045 states and 24934 transitions. [2020-07-20 15:06:45,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-07-20 15:06:45,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:45,695 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] [2020-07-20 15:06:45,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:45,897 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:45,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:45,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1275831673, now seen corresponding path program 1 times [2020-07-20 15:06:45,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:45,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63701489] [2020-07-20 15:06:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:46,169 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:06:46,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:46,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:46,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:46,352 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:46,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63701489] [2020-07-20 15:06:46,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:46,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:46,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488085795] [2020-07-20 15:06:46,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:46,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:46,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:46,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:46,356 INFO L87 Difference]: Start difference. First operand 16045 states and 24934 transitions. Second operand 3 states. [2020-07-20 15:06:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:47,637 INFO L93 Difference]: Finished difference Result 40239 states and 61528 transitions. [2020-07-20 15:06:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:06:47,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 345 [2020-07-20 15:06:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:47,667 INFO L225 Difference]: With dead ends: 40239 [2020-07-20 15:06:47,668 INFO L226 Difference]: Without dead ends: 28563 [2020-07-20 15:06:47,681 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 [2020-07-20 15:06:47,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28563 states. [2020-07-20 15:06:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28563 to 28561. [2020-07-20 15:06:48,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28561 states. [2020-07-20 15:06:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28561 states to 28561 states and 43630 transitions. [2020-07-20 15:06:48,819 INFO L78 Accepts]: Start accepts. Automaton has 28561 states and 43630 transitions. Word has length 345 [2020-07-20 15:06:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:48,820 INFO L479 AbstractCegarLoop]: Abstraction has 28561 states and 43630 transitions. [2020-07-20 15:06:48,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:06:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 28561 states and 43630 transitions. [2020-07-20 15:06:48,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-20 15:06:48,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:48,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:49,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:49,049 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:49,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:49,050 INFO L82 PathProgramCache]: Analyzing trace with hash -515591940, now seen corresponding path program 1 times [2020-07-20 15:06:49,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:49,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113895307] [2020-07-20 15:06:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:49,330 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:06:49,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:49,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 1275 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:49,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:49,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:49,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113895307] [2020-07-20 15:06:49,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:49,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:49,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190044544] [2020-07-20 15:06:49,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:49,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:49,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:49,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:49,448 INFO L87 Difference]: Start difference. First operand 28561 states and 43630 transitions. Second operand 3 states. [2020-07-20 15:06:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:52,076 INFO L93 Difference]: Finished difference Result 81097 states and 123133 transitions. [2020-07-20 15:06:52,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:06:52,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-20 15:06:52,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:52,135 INFO L225 Difference]: With dead ends: 81097 [2020-07-20 15:06:52,135 INFO L226 Difference]: Without dead ends: 55866 [2020-07-20 15:06:52,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:52,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55866 states. [2020-07-20 15:06:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55866 to 55864. [2020-07-20 15:06:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55864 states. [2020-07-20 15:06:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55864 states to 55864 states and 84790 transitions. [2020-07-20 15:06:54,186 INFO L78 Accepts]: Start accepts. Automaton has 55864 states and 84790 transitions. Word has length 346 [2020-07-20 15:06:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:06:54,186 INFO L479 AbstractCegarLoop]: Abstraction has 55864 states and 84790 transitions. [2020-07-20 15:06:54,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:06:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 55864 states and 84790 transitions. [2020-07-20 15:06:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-07-20 15:06:54,235 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:06:54,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:06:54,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:54,447 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:06:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:06:54,448 INFO L82 PathProgramCache]: Analyzing trace with hash 591039255, now seen corresponding path program 1 times [2020-07-20 15:06:54,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:06:54,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075584275] [2020-07-20 15:06:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:06:54,670 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:06:54,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:06:54,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:06:54,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:06:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:06:54,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:06:54,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075584275] [2020-07-20 15:06:54,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:06:54,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:06:54,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354695295] [2020-07-20 15:06:54,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:06:54,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:06:54,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:06:54,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:06:54,733 INFO L87 Difference]: Start difference. First operand 55864 states and 84790 transitions. Second operand 3 states. [2020-07-20 15:06:59,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:06:59,806 INFO L93 Difference]: Finished difference Result 164159 states and 248627 transitions. [2020-07-20 15:06:59,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:06:59,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 346 [2020-07-20 15:06:59,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:06:59,924 INFO L225 Difference]: With dead ends: 164159 [2020-07-20 15:06:59,924 INFO L226 Difference]: Without dead ends: 110089 [2020-07-20 15:06:59,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:07:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110089 states. [2020-07-20 15:07:02,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110089 to 56325. [2020-07-20 15:07:02,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56325 states. [2020-07-20 15:07:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56325 states to 56325 states and 85340 transitions. [2020-07-20 15:07:02,539 INFO L78 Accepts]: Start accepts. Automaton has 56325 states and 85340 transitions. Word has length 346 [2020-07-20 15:07:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:07:02,539 INFO L479 AbstractCegarLoop]: Abstraction has 56325 states and 85340 transitions. [2020-07-20 15:07:02,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:07:02,539 INFO L276 IsEmpty]: Start isEmpty. Operand 56325 states and 85340 transitions. [2020-07-20 15:07:02,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-07-20 15:07:02,573 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:07:02,574 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] [2020-07-20 15:07:02,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:02,775 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:07:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:07:02,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1626377061, now seen corresponding path program 1 times [2020-07-20 15:07:02,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:07:02,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45741208] [2020-07-20 15:07:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:03,021 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:07:03,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:07:03,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:07:03,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:07:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:07:03,097 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:07:03,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45741208] [2020-07-20 15:07:03,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:07:03,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:07:03,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449897301] [2020-07-20 15:07:03,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:07:03,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:07:03,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:07:03,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:07:03,099 INFO L87 Difference]: Start difference. First operand 56325 states and 85340 transitions. Second operand 3 states. [2020-07-20 15:07:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:07:06,900 INFO L93 Difference]: Finished difference Result 165212 states and 250138 transitions. [2020-07-20 15:07:06,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:07:06,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 347 [2020-07-20 15:07:06,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:07:07,037 INFO L225 Difference]: With dead ends: 165212 [2020-07-20 15:07:07,037 INFO L226 Difference]: Without dead ends: 111153 [2020-07-20 15:07:07,096 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 [2020-07-20 15:07:07,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111153 states. [2020-07-20 15:07:11,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111153 to 57062. [2020-07-20 15:07:11,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57062 states. [2020-07-20 15:07:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57062 states to 57062 states and 86362 transitions. [2020-07-20 15:07:11,428 INFO L78 Accepts]: Start accepts. Automaton has 57062 states and 86362 transitions. Word has length 347 [2020-07-20 15:07:11,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:07:11,428 INFO L479 AbstractCegarLoop]: Abstraction has 57062 states and 86362 transitions. [2020-07-20 15:07:11,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:07:11,428 INFO L276 IsEmpty]: Start isEmpty. Operand 57062 states and 86362 transitions. [2020-07-20 15:07:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-20 15:07:11,468 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:07:11,469 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] [2020-07-20 15:07:11,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:11,683 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:07:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:07:11,684 INFO L82 PathProgramCache]: Analyzing trace with hash 1606806177, now seen corresponding path program 1 times [2020-07-20 15:07:11,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:07:11,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700688704] [2020-07-20 15:07:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:11,938 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 15:07:11,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:07:11,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 15:07:11,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:07:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:07:12,248 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:07:12,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700688704] [2020-07-20 15:07:12,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:07:12,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:07:12,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844334849] [2020-07-20 15:07:12,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:07:12,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:07:12,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:07:12,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:07:12,252 INFO L87 Difference]: Start difference. First operand 57062 states and 86362 transitions. Second operand 4 states. [2020-07-20 15:07:15,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:07:15,264 INFO L93 Difference]: Finished difference Result 127448 states and 191855 transitions. [2020-07-20 15:07:15,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:07:15,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 348 [2020-07-20 15:07:15,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:07:15,338 INFO L225 Difference]: With dead ends: 127448 [2020-07-20 15:07:15,339 INFO L226 Difference]: Without dead ends: 66046 [2020-07-20 15:07:15,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:07:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66046 states. [2020-07-20 15:07:19,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66046 to 66044. [2020-07-20 15:07:19,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66044 states. [2020-07-20 15:07:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66044 states to 66044 states and 98534 transitions. [2020-07-20 15:07:20,069 INFO L78 Accepts]: Start accepts. Automaton has 66044 states and 98534 transitions. Word has length 348 [2020-07-20 15:07:20,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:07:20,069 INFO L479 AbstractCegarLoop]: Abstraction has 66044 states and 98534 transitions. [2020-07-20 15:07:20,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:07:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 66044 states and 98534 transitions. [2020-07-20 15:07:20,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-07-20 15:07:20,116 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:07:20,116 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] [2020-07-20 15:07:20,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:20,323 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:07:20,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:07:20,324 INFO L82 PathProgramCache]: Analyzing trace with hash 281007074, now seen corresponding path program 1 times [2020-07-20 15:07:20,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:07:20,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309852415] [2020-07-20 15:07:20,325 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:20,602 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:07:20,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:07:20,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:07:20,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:07:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:07:20,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:07:20,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309852415] [2020-07-20 15:07:20,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:07:20,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:07:20,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839893520] [2020-07-20 15:07:20,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:07:20,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:07:20,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:07:20,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:07:20,680 INFO L87 Difference]: Start difference. First operand 66044 states and 98534 transitions. Second operand 3 states. [2020-07-20 15:07:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:07:24,172 INFO L93 Difference]: Finished difference Result 123113 states and 186021 transitions. [2020-07-20 15:07:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:07:24,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 350 [2020-07-20 15:07:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:07:24,275 INFO L225 Difference]: With dead ends: 123113 [2020-07-20 15:07:24,275 INFO L226 Difference]: Without dead ends: 87178 [2020-07-20 15:07:24,317 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 [2020-07-20 15:07:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87178 states. [2020-07-20 15:07:28,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87178 to 78256. [2020-07-20 15:07:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78256 states. [2020-07-20 15:07:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78256 states to 78256 states and 118262 transitions. [2020-07-20 15:07:28,304 INFO L78 Accepts]: Start accepts. Automaton has 78256 states and 118262 transitions. Word has length 350 [2020-07-20 15:07:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:07:28,304 INFO L479 AbstractCegarLoop]: Abstraction has 78256 states and 118262 transitions. [2020-07-20 15:07:28,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:07:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 78256 states and 118262 transitions. [2020-07-20 15:07:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-07-20 15:07:28,352 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:07:28,352 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] [2020-07-20 15:07:28,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:28,553 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:07:28,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:07:28,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1251474123, now seen corresponding path program 1 times [2020-07-20 15:07:28,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:07:28,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45733353] [2020-07-20 15:07:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:28,785 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:07:28,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:07:28,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:07:28,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:07:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:07:28,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:07:28,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45733353] [2020-07-20 15:07:28,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:07:28,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:07:28,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004666140] [2020-07-20 15:07:28,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:07:28,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:07:28,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:07:28,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:07:28,857 INFO L87 Difference]: Start difference. First operand 78256 states and 118262 transitions. Second operand 3 states. [2020-07-20 15:07:36,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:07:36,581 INFO L93 Difference]: Finished difference Result 211696 states and 319573 transitions. [2020-07-20 15:07:36,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:07:36,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 350 [2020-07-20 15:07:36,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:07:36,732 INFO L225 Difference]: With dead ends: 211696 [2020-07-20 15:07:36,732 INFO L226 Difference]: Without dead ends: 148647 [2020-07-20 15:07:36,788 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 [2020-07-20 15:07:36,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148647 states. [2020-07-20 15:07:40,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148647 to 78894. [2020-07-20 15:07:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78894 states. [2020-07-20 15:07:40,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78894 states to 78894 states and 118989 transitions. [2020-07-20 15:07:40,886 INFO L78 Accepts]: Start accepts. Automaton has 78894 states and 118989 transitions. Word has length 350 [2020-07-20 15:07:40,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:07:40,887 INFO L479 AbstractCegarLoop]: Abstraction has 78894 states and 118989 transitions. [2020-07-20 15:07:40,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:07:40,887 INFO L276 IsEmpty]: Start isEmpty. Operand 78894 states and 118989 transitions. [2020-07-20 15:07:40,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-07-20 15:07:40,930 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:07:40,930 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] [2020-07-20 15:07:41,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:41,131 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:07:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:07:41,132 INFO L82 PathProgramCache]: Analyzing trace with hash 366509442, now seen corresponding path program 1 times [2020-07-20 15:07:41,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:07:41,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393869383] [2020-07-20 15:07:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:41,351 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:07:41,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:07:41,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 15:07:41,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:07:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:07:41,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:07:41,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393869383] [2020-07-20 15:07:41,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:07:41,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 15:07:41,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991087742] [2020-07-20 15:07:41,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 15:07:41,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:07:41,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 15:07:41,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-20 15:07:41,647 INFO L87 Difference]: Start difference. First operand 78894 states and 118989 transitions. Second operand 4 states. [2020-07-20 15:07:48,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:07:48,568 INFO L93 Difference]: Finished difference Result 211902 states and 319587 transitions. [2020-07-20 15:07:48,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 15:07:48,569 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 350 [2020-07-20 15:07:48,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:07:48,762 INFO L225 Difference]: With dead ends: 211902 [2020-07-20 15:07:48,762 INFO L226 Difference]: Without dead ends: 153732 [2020-07-20 15:07:48,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 347 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-20 15:07:48,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153732 states. [2020-07-20 15:07:56,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153732 to 96402. [2020-07-20 15:07:56,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96402 states. [2020-07-20 15:07:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96402 states to 96402 states and 145513 transitions. [2020-07-20 15:07:56,633 INFO L78 Accepts]: Start accepts. Automaton has 96402 states and 145513 transitions. Word has length 350 [2020-07-20 15:07:56,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:07:56,633 INFO L479 AbstractCegarLoop]: Abstraction has 96402 states and 145513 transitions. [2020-07-20 15:07:56,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 15:07:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 96402 states and 145513 transitions. [2020-07-20 15:07:56,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-07-20 15:07:56,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:07:56,711 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] [2020-07-20 15:07:56,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:56,912 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:07:56,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:07:56,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1072229493, now seen corresponding path program 1 times [2020-07-20 15:07:56,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:07:56,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835274634] [2020-07-20 15:07:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:07:57,187 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:07:57,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:07:57,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1281 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:07:57,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:07:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:07:57,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:07:57,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835274634] [2020-07-20 15:07:57,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:07:57,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:07:57,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2324028] [2020-07-20 15:07:57,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:07:57,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:07:57,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:07:57,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:07:57,280 INFO L87 Difference]: Start difference. First operand 96402 states and 145513 transitions. Second operand 3 states. [2020-07-20 15:08:05,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:08:05,911 INFO L93 Difference]: Finished difference Result 237001 states and 356330 transitions. [2020-07-20 15:08:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:08:05,911 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 350 [2020-07-20 15:08:05,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:08:06,113 INFO L225 Difference]: With dead ends: 237001 [2020-07-20 15:08:06,113 INFO L226 Difference]: Without dead ends: 171331 [2020-07-20 15:08:06,173 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 [2020-07-20 15:08:06,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171331 states. [2020-07-20 15:08:17,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171331 to 170129. [2020-07-20 15:08:17,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170129 states. [2020-07-20 15:08:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170129 states to 170129 states and 254656 transitions. [2020-07-20 15:08:17,889 INFO L78 Accepts]: Start accepts. Automaton has 170129 states and 254656 transitions. Word has length 350 [2020-07-20 15:08:17,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:08:17,889 INFO L479 AbstractCegarLoop]: Abstraction has 170129 states and 254656 transitions. [2020-07-20 15:08:17,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:08:17,889 INFO L276 IsEmpty]: Start isEmpty. Operand 170129 states and 254656 transitions. [2020-07-20 15:08:17,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 15:08:18,000 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:08:18,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (21)] Forcibly destroying the process [2020-07-20 15:08:18,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:18,438 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:08:18,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:08:18,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1885110974, now seen corresponding path program 1 times [2020-07-20 15:08:18,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:08:18,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1148463835] [2020-07-20 15:08:18,439 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:08:18,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:08:18,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:08:18,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1283 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:08:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:08:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:08:18,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:08:18,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1148463835] [2020-07-20 15:08:18,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:08:18,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 15:08:18,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344621547] [2020-07-20 15:08:18,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 15:08:18,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:08:18,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 15:08:18,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 15:08:18,845 INFO L87 Difference]: Start difference. First operand 170129 states and 254656 transitions. Second operand 9 states. [2020-07-20 15:09:34,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:09:34,448 INFO L93 Difference]: Finished difference Result 1003651 states and 1543117 transitions. [2020-07-20 15:09:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 15:09:34,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 351 [2020-07-20 15:09:34,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:09:35,731 INFO L225 Difference]: With dead ends: 1003651 [2020-07-20 15:09:35,731 INFO L226 Difference]: Without dead ends: 963873 [2020-07-20 15:09:35,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482 [2020-07-20 15:09:36,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963873 states. [2020-07-20 15:10:20,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963873 to 384169. [2020-07-20 15:10:20,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384169 states. [2020-07-20 15:10:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384169 states to 384169 states and 585136 transitions. [2020-07-20 15:10:20,965 INFO L78 Accepts]: Start accepts. Automaton has 384169 states and 585136 transitions. Word has length 351 [2020-07-20 15:10:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:10:20,965 INFO L479 AbstractCegarLoop]: Abstraction has 384169 states and 585136 transitions. [2020-07-20 15:10:20,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 15:10:20,966 INFO L276 IsEmpty]: Start isEmpty. Operand 384169 states and 585136 transitions. [2020-07-20 15:10:21,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 15:10:21,146 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:10:21,146 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] [2020-07-20 15:10:21,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:10:21,347 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:10:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:10:21,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1369510302, now seen corresponding path program 1 times [2020-07-20 15:10:21,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:10:21,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001493793] [2020-07-20 15:10:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:10:21,607 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 15:10:21,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:10:21,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 1279 conjuncts, 2 conjunts are in the unsatisfiable core [2020-07-20 15:10:21,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:10:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:10:21,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:10:21,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001493793] [2020-07-20 15:10:21,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:10:21,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 15:10:21,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139525064] [2020-07-20 15:10:21,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 15:10:21,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:10:21,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 15:10:21,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:10:21,744 INFO L87 Difference]: Start difference. First operand 384169 states and 585136 transitions. Second operand 3 states. [2020-07-20 15:11:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 15:11:24,157 INFO L93 Difference]: Finished difference Result 1057759 states and 1610908 transitions. [2020-07-20 15:11:24,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 15:11:24,158 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 351 [2020-07-20 15:11:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 15:11:25,249 INFO L225 Difference]: With dead ends: 1057759 [2020-07-20 15:11:25,249 INFO L226 Difference]: Without dead ends: 721651 [2020-07-20 15:11:25,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 15:11:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721651 states. [2020-07-20 15:12:39,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721651 to 721649. [2020-07-20 15:12:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721649 states. [2020-07-20 15:12:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721649 states to 721649 states and 1093585 transitions. [2020-07-20 15:12:40,855 INFO L78 Accepts]: Start accepts. Automaton has 721649 states and 1093585 transitions. Word has length 351 [2020-07-20 15:12:40,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 15:12:40,855 INFO L479 AbstractCegarLoop]: Abstraction has 721649 states and 1093585 transitions. [2020-07-20 15:12:40,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 15:12:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand 721649 states and 1093585 transitions. [2020-07-20 15:12:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-07-20 15:12:41,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 15:12:41,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 15:12:41,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:41,422 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 15:12:41,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 15:12:41,423 INFO L82 PathProgramCache]: Analyzing trace with hash 1351823149, now seen corresponding path program 1 times [2020-07-20 15:12:41,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 15:12:41,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896563022] [2020-07-20 15:12:41,424 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 15:12:41,655 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 15:12:41,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 15:12:41,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 992 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 15:12:41,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 15:12:41,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 15:12:41,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 15:12:41,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896563022] [2020-07-20 15:12:41,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 15:12:41,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 15:12:41,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780167882] [2020-07-20 15:12:41,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 15:12:41,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 15:12:41,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 15:12:41,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-07-20 15:12:41,770 INFO L87 Difference]: Start difference. First operand 721649 states and 1093585 transitions. Second operand 9 states.