/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:02:50,537 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:02:50,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:02:50,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:02:50,553 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:02:50,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:02:50,555 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:02:50,557 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:02:50,559 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:02:50,560 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:02:50,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:02:50,562 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:02:50,562 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:02:50,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:02:50,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:02:50,566 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:02:50,567 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:02:50,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:02:50,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:02:50,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:02:50,573 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:02:50,574 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:02:50,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:02:50,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:02:50,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 22:02:50,579 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 22:02:50,579 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 22:02:50,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 22:02:50,580 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 22:02:50,581 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 22:02:50,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 22:02:50,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 22:02:50,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 22:02:50,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 22:02:50,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 22:02:50,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 22:02:50,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 22:02:50,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 22:02:50,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 22:02:50,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 22:02:50,588 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 22:02:50,589 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 22:02:50,604 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:02:50,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:02:50,605 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:02:50,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:02:50,606 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:02:50,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:02:50,606 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:02:50,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:02:50,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:02:50,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:02:50,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:02:50,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:02:50,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:02:50,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:02:50,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:02:50,610 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:02:50,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:02:50,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:02:50,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:02:50,610 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:02:50,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:02:50,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:02:50,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:02:50,611 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:02:50,611 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:02:50,612 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:02:50,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:50,612 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:02:50,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:02:50,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 22:02:50,899 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:02:50,913 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:02:50,916 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:02:50,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:02:50,918 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:02:50,919 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-21 22:02:51,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a93e8e69e/afb6ff6f5a65474aa9109c5c20abf7c4/FLAG5c98a0599 [2020-07-21 22:02:51,443 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:02:51,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-21 22:02:51,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a93e8e69e/afb6ff6f5a65474aa9109c5c20abf7c4/FLAG5c98a0599 [2020-07-21 22:02:51,829 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a93e8e69e/afb6ff6f5a65474aa9109c5c20abf7c4 [2020-07-21 22:02:51,841 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:02:51,844 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:02:51,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:51,845 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:02:51,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:02:51,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:51" (1/1) ... [2020-07-21 22:02:51,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31392a2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:51, skipping insertion in model container [2020-07-21 22:02:51,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:02:51" (1/1) ... [2020-07-21 22:02:51,861 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:02:51,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:02:52,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:52,040 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:02:52,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:02:52,070 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:02:52,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:52 WrapperNode [2020-07-21 22:02:52,071 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:02:52,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:02:52,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:02:52,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:02:52,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:52" (1/1) ... [2020-07-21 22:02:52,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:52" (1/1) ... [2020-07-21 22:02:52,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:52" (1/1) ... [2020-07-21 22:02:52,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:52" (1/1) ... [2020-07-21 22:02:52,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:52" (1/1) ... [2020-07-21 22:02:52,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:52" (1/1) ... [2020-07-21 22:02:52,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:52" (1/1) ... [2020-07-21 22:02:52,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:02:52,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:02:52,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:02:52,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:02:52,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:02:52,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:02:52,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:02:52,232 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 22:02:52,232 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:02:52,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:02:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:02:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 22:02:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:02:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:02:52,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:02:52,404 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:02:52,405 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:02:52,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:52 BoogieIcfgContainer [2020-07-21 22:02:52,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:02:52,424 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:02:52,424 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:02:52,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:02:52,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:02:51" (1/3) ... [2020-07-21 22:02:52,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5274c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:52, skipping insertion in model container [2020-07-21 22:02:52,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:02:52" (2/3) ... [2020-07-21 22:02:52,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5274c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:02:52, skipping insertion in model container [2020-07-21 22:02:52,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:02:52" (3/3) ... [2020-07-21 22:02:52,445 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2020-07-21 22:02:52,469 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:02:52,485 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:02:52,510 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:02:52,546 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:02:52,546 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:02:52,547 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:02:52,547 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:02:52,547 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:02:52,548 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:02:52,548 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:02:52,549 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:02:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 22:02:52,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:02:52,574 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:52,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:52,576 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:52,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:52,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-21 22:02:52,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:52,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090950086] [2020-07-21 22:02:52,589 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:52,643 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:52,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:52,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:02:52,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:02:52,736 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:52,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090950086] [2020-07-21 22:02:52,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:52,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:02:52,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275235033] [2020-07-21 22:02:52,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:02:52,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:52,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:02:52,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:02:52,756 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-21 22:02:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:52,868 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-07-21 22:02:52,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:02:52,870 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:02:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:52,880 INFO L225 Difference]: With dead ends: 33 [2020-07-21 22:02:52,880 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 22:02:52,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:02:52,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 22:02:52,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 22:02:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 22:02:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 22:02:52,926 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 22:02:52,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:52,927 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 22:02:52,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:02:52,927 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 22:02:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:02:52,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:52,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:53,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:53,137 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:53,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:53,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-21 22:02:53,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:53,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951358048] [2020-07-21 22:02:53,139 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:53,161 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:02:53,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:53,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:02:53,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:53,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 22:02:53,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:02:53,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951358048] [2020-07-21 22:02:53,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:02:53,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:02:53,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171632566] [2020-07-21 22:02:53,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:02:53,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:53,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:02:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:02:53,206 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 22:02:53,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:53,270 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 22:02:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:02:53,271 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:02:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:53,273 INFO L225 Difference]: With dead ends: 27 [2020-07-21 22:02:53,273 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 22:02:53,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 22:02:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 22:02:53,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 22:02:53,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 22:02:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 22:02:53,283 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 22:02:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:53,284 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 22:02:53,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:02:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 22:02:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:02:53,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:53,286 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:53,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:53,500 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-21 22:02:53,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:53,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094892545] [2020-07-21 22:02:53,503 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:53,545 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:53,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:53,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:02:53,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:53,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:02:53,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:53,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:53,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 22:02:53,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094892545] [2020-07-21 22:02:53,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:53,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 22:02:53,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026884319] [2020-07-21 22:02:53,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:02:53,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:53,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:02:53,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:02:53,828 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 22:02:53,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:53,928 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 22:02:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:02:53,929 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 22:02:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:53,931 INFO L225 Difference]: With dead ends: 32 [2020-07-21 22:02:53,931 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 22:02:53,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:02:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 22:02:53,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 22:02:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 22:02:53,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 22:02:53,941 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 22:02:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:53,942 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 22:02:53,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:02:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 22:02:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:02:53,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:53,944 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:54,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:54,160 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:54,161 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-21 22:02:54,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:54,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286983726] [2020-07-21 22:02:54,163 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) [2020-07-21 22:02:54,187 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:54,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:54,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:02:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:02:54,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:54,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 22:02:54,445 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286983726] [2020-07-21 22:02:54,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:54,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 22:02:54,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282264651] [2020-07-21 22:02:54,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 22:02:54,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:54,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 22:02:54,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 22:02:54,448 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 22:02:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:54,544 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 22:02:54,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 22:02:54,547 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 22:02:54,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:54,549 INFO L225 Difference]: With dead ends: 37 [2020-07-21 22:02:54,550 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 22:02:54,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:02:54,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 22:02:54,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 22:02:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 22:02:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 22:02:54,569 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 22:02:54,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:54,570 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 22:02:54,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 22:02:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 22:02:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 22:02:54,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:54,576 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:54,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:54,777 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:54,778 INFO L82 PathProgramCache]: Analyzing trace with hash 246499846, now seen corresponding path program 2 times [2020-07-21 22:02:54,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:54,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510935309] [2020-07-21 22:02:54,778 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) [2020-07-21 22:02:54,816 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:54,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:54,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:02:54,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 22:02:54,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:55,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:55,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 22:02:55,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510935309] [2020-07-21 22:02:55,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:55,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 22:02:55,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031993336] [2020-07-21 22:02:55,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:02:55,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:55,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:02:55,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:02:55,212 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 22:02:55,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:55,353 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 22:02:55,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:02:55,354 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 22:02:55,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:55,356 INFO L225 Difference]: With dead ends: 42 [2020-07-21 22:02:55,357 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 22:02:55,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:02:55,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 22:02:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 22:02:55,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 22:02:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 22:02:55,382 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 22:02:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:55,383 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 22:02:55,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:02:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 22:02:55,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 22:02:55,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:55,385 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:55,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:55,589 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:55,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:55,590 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 2 times [2020-07-21 22:02:55,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:55,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371160571] [2020-07-21 22:02:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:55,621 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:55,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:55,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:02:55,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 22:02:55,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:55,911 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:55,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 22:02:56,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371160571] [2020-07-21 22:02:56,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:56,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 22:02:56,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964189279] [2020-07-21 22:02:56,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 22:02:56,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:56,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 22:02:56,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 22:02:56,004 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 22:02:56,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:56,169 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 22:02:56,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:02:56,170 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 22:02:56,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:56,173 INFO L225 Difference]: With dead ends: 47 [2020-07-21 22:02:56,173 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 22:02:56,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:02:56,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 22:02:56,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 22:02:56,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 22:02:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 22:02:56,185 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 22:02:56,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:56,185 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 22:02:56,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 22:02:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 22:02:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 22:02:56,188 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:56,188 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:56,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:56,396 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:56,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:56,397 INFO L82 PathProgramCache]: Analyzing trace with hash 2029845474, now seen corresponding path program 3 times [2020-07-21 22:02:56,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:56,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428257912] [2020-07-21 22:02:56,398 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:56,436 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:02:56,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:56,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:02:56,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 22:02:56,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:56,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:56,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:57,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:57,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:57,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 22:02:57,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428257912] [2020-07-21 22:02:57,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:57,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 22:02:57,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394267502] [2020-07-21 22:02:57,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:02:57,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:57,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:02:57,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:02:57,124 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 22:02:57,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:57,290 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 22:02:57,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:02:57,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 22:02:57,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:57,295 INFO L225 Difference]: With dead ends: 52 [2020-07-21 22:02:57,295 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 22:02:57,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:02:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 22:02:57,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 22:02:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 22:02:57,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 22:02:57,308 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 22:02:57,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:57,308 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 22:02:57,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:02:57,308 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 22:02:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 22:02:57,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:57,311 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:57,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:57,520 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:57,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:57,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1541039141, now seen corresponding path program 3 times [2020-07-21 22:02:57,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:57,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [583719395] [2020-07-21 22:02:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:57,556 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:02:57,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:02:57,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-07-21 22:02:57,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:58,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:58,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:58,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:58,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:58,211 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 142 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 22:02:58,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [583719395] [2020-07-21 22:02:58,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:02:58,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 22:02:58,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900078579] [2020-07-21 22:02:58,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 22:02:58,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:02:58,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 22:02:58,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 22:02:58,216 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 22:02:58,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:02:58,401 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 22:02:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:02:58,405 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-21 22:02:58,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:02:58,409 INFO L225 Difference]: With dead ends: 57 [2020-07-21 22:02:58,409 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 22:02:58,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:02:58,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 22:02:58,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 22:02:58,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 22:02:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 22:02:58,436 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 82 [2020-07-21 22:02:58,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:02:58,437 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 22:02:58,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 22:02:58,440 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 22:02:58,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 22:02:58,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:02:58,446 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:02:58,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:58,660 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:02:58,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:02:58,660 INFO L82 PathProgramCache]: Analyzing trace with hash 332479940, now seen corresponding path program 4 times [2020-07-21 22:02:58,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:02:58,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745864883] [2020-07-21 22:02:58,661 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:02:58,727 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:02:58,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:02:58,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:02:58,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:02:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 507 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2020-07-21 22:02:58,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:02:59,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:59,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:59,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:02:59,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 529 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2020-07-21 22:03:00,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745864883] [2020-07-21 22:03:00,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:00,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 22:03:00,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149832933] [2020-07-21 22:03:00,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:03:00,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:00,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:03:00,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:03:00,055 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 22:03:00,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:00,235 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 22:03:00,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:03:00,235 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 195 [2020-07-21 22:03:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:00,238 INFO L225 Difference]: With dead ends: 62 [2020-07-21 22:03:00,238 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 22:03:00,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 367 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:03:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 22:03:00,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 22:03:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 22:03:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 22:03:00,251 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 195 [2020-07-21 22:03:00,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:00,252 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 22:03:00,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:03:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 22:03:00,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 22:03:00,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:00,254 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:00,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:00,467 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:00,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:00,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2116311810, now seen corresponding path program 4 times [2020-07-21 22:03:00,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:00,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142816547] [2020-07-21 22:03:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:00,526 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:03:00,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:00,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:03:00,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 268 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-07-21 22:03:00,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:01,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:01,203 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:01,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:01,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:01,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:01,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:01,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:01,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:01,552 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 294 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 22:03:01,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142816547] [2020-07-21 22:03:01,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:01,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 22:03:01,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128603050] [2020-07-21 22:03:01,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 22:03:01,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:01,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 22:03:01,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:03:01,554 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 22:03:01,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:01,776 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 22:03:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:03:01,776 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 122 [2020-07-21 22:03:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:01,779 INFO L225 Difference]: With dead ends: 67 [2020-07-21 22:03:01,780 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 22:03:01,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 220 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:03:01,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 22:03:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 22:03:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 22:03:01,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 22:03:01,792 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 122 [2020-07-21 22:03:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:01,793 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 22:03:01,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 22:03:01,793 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 22:03:01,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 22:03:01,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:01,797 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:02,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:02,011 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:02,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1067745099, now seen corresponding path program 5 times [2020-07-21 22:03:02,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:02,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119464031] [2020-07-21 22:03:02,013 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:02,089 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:03:02,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:02,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:03:02,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 22:03:02,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:03,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:03,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:03,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:03,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:03,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:03,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:04,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:04,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:04,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 22:03:04,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119464031] [2020-07-21 22:03:04,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:04,162 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 22:03:04,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221841697] [2020-07-21 22:03:04,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:03:04,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:04,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:03:04,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:03:04,167 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 22:03:04,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:04,419 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 22:03:04,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:03:04,419 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 22:03:04,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:04,422 INFO L225 Difference]: With dead ends: 72 [2020-07-21 22:03:04,423 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 22:03:04,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:03:04,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 22:03:04,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 22:03:04,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 22:03:04,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 22:03:04,437 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 22:03:04,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:04,438 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 22:03:04,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:03:04,438 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 22:03:04,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-07-21 22:03:04,442 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:04,443 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 35, 21, 21, 21, 21, 21, 21, 21, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:04,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:04,656 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:04,657 INFO L82 PathProgramCache]: Analyzing trace with hash 659892537, now seen corresponding path program 5 times [2020-07-21 22:03:04,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:04,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205413671] [2020-07-21 22:03:04,657 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:04,757 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:03:04,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:04,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:03:04,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:04,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1061 refuted. 0 times theorem prover too weak. 3827 trivial. 0 not checked. [2020-07-21 22:03:04,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:06,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:06,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:06,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:06,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:06,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:06,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:06,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:06,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1101 refuted. 0 times theorem prover too weak. 3787 trivial. 0 not checked. [2020-07-21 22:03:06,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205413671] [2020-07-21 22:03:06,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:06,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 22:03:06,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303610871] [2020-07-21 22:03:06,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 22:03:06,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:06,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 22:03:06,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 22:03:06,880 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-21 22:03:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:07,141 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 22:03:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:03:07,142 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 300 [2020-07-21 22:03:07,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:07,149 INFO L225 Difference]: With dead ends: 77 [2020-07-21 22:03:07,149 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 22:03:07,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 572 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 22:03:07,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 22:03:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 22:03:07,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 22:03:07,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 22:03:07,177 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 300 [2020-07-21 22:03:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:07,178 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 22:03:07,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 22:03:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 22:03:07,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-07-21 22:03:07,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:07,187 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:07,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:07,401 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:07,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:07,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2120427989, now seen corresponding path program 6 times [2020-07-21 22:03:07,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:07,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591299937] [2020-07-21 22:03:07,402 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:07,523 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:03:07,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:07,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:03:07,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:07,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8874 backedges. 248 proven. 1621 refuted. 0 times theorem prover too weak. 7005 trivial. 0 not checked. [2020-07-21 22:03:07,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:09,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:09,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:09,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8874 backedges. 248 proven. 1672 refuted. 0 times theorem prover too weak. 6954 trivial. 0 not checked. [2020-07-21 22:03:10,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591299937] [2020-07-21 22:03:10,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:10,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 22:03:10,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179226064] [2020-07-21 22:03:10,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:03:10,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:10,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:03:10,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:03:10,626 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-21 22:03:10,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:10,902 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 22:03:10,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:03:10,903 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 390 [2020-07-21 22:03:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:10,908 INFO L225 Difference]: With dead ends: 82 [2020-07-21 22:03:10,910 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 22:03:10,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 787 GetRequests, 749 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:03:10,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 22:03:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 22:03:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 22:03:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 22:03:10,936 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 390 [2020-07-21 22:03:10,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:10,937 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 22:03:10,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:03:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 22:03:10,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2020-07-21 22:03:10,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:10,945 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 76, 44, 44, 44, 44, 44, 44, 44, 32, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:11,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:11,158 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:11,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:11,159 INFO L82 PathProgramCache]: Analyzing trace with hash -694257440, now seen corresponding path program 6 times [2020-07-21 22:03:11,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:11,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821207687] [2020-07-21 22:03:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:11,309 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:03:11,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:11,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:03:11,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 22298 backedges. 491 proven. 2713 refuted. 0 times theorem prover too weak. 19094 trivial. 0 not checked. [2020-07-21 22:03:11,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:13,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:13,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:14,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:14,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:15,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:15,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:15,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:15,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:15,401 INFO L134 CoverageAnalysis]: Checked inductivity of 22298 backedges. 491 proven. 2770 refuted. 0 times theorem prover too weak. 19037 trivial. 0 not checked. [2020-07-21 22:03:15,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821207687] [2020-07-21 22:03:15,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:15,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 22:03:15,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020991496] [2020-07-21 22:03:15,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 22:03:15,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:15,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 22:03:15,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 22:03:15,404 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-21 22:03:15,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:15,795 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-21 22:03:15,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:03:15,796 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 617 [2020-07-21 22:03:15,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:15,801 INFO L225 Difference]: With dead ends: 87 [2020-07-21 22:03:15,801 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 22:03:15,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1240 GetRequests, 1202 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:03:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 22:03:15,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-21 22:03:15,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 22:03:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 22:03:15,842 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 617 [2020-07-21 22:03:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:15,849 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 22:03:15,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 22:03:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 22:03:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1184 [2020-07-21 22:03:15,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:15,872 INFO L422 BasicCegarLoop]: trace histogram [181, 181, 91, 90, 90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:16,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:16,081 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:16,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:16,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1630389726, now seen corresponding path program 7 times [2020-07-21 22:03:16,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:16,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279171754] [2020-07-21 22:03:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:16,357 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:03:16,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:16,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:03:16,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 85185 backedges. 1108 proven. 6068 refuted. 0 times theorem prover too weak. 78009 trivial. 0 not checked. [2020-07-21 22:03:17,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:20,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:22,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:23,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:23,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:23,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:23,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:23,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:23,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 85185 backedges. 1108 proven. 6138 refuted. 0 times theorem prover too weak. 77939 trivial. 0 not checked. [2020-07-21 22:03:24,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279171754] [2020-07-21 22:03:24,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:24,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 22:03:24,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286337138] [2020-07-21 22:03:24,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 22:03:24,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:24,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 22:03:24,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:03:24,391 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-21 22:03:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:24,989 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-21 22:03:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:03:24,990 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1183 [2020-07-21 22:03:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:24,995 INFO L225 Difference]: With dead ends: 92 [2020-07-21 22:03:24,996 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 22:03:24,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2374 GetRequests, 2331 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 22:03:24,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 22:03:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-21 22:03:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 22:03:25,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 22:03:25,010 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1183 [2020-07-21 22:03:25,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:25,012 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 22:03:25,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 22:03:25,013 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 22:03:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1066 [2020-07-21 22:03:25,022 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:25,023 INFO L422 BasicCegarLoop]: trace histogram [155, 155, 128, 77, 77, 77, 77, 77, 77, 77, 51, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:25,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:25,238 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:25,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:25,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1871885629, now seen corresponding path program 7 times [2020-07-21 22:03:25,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:25,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706218553] [2020-07-21 22:03:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:25,487 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:03:25,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:25,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:03:25,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 67572 backedges. 931 proven. 5636 refuted. 0 times theorem prover too weak. 61005 trivial. 0 not checked. [2020-07-21 22:03:26,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:29,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:29,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:30,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:30,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:31,440 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:31,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:31,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:31,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:31,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:32,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:32,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:32,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 67572 backedges. 931 proven. 5713 refuted. 0 times theorem prover too weak. 60928 trivial. 0 not checked. [2020-07-21 22:03:32,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706218553] [2020-07-21 22:03:32,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:32,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 22:03:32,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935291595] [2020-07-21 22:03:32,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:03:32,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:32,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:03:32,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:03:32,533 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 20 states. [2020-07-21 22:03:32,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:32,877 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-21 22:03:32,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:03:32,878 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 1065 [2020-07-21 22:03:32,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:32,882 INFO L225 Difference]: With dead ends: 97 [2020-07-21 22:03:32,882 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 22:03:32,883 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2137 GetRequests, 2094 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:03:32,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 22:03:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-21 22:03:32,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 22:03:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 22:03:32,897 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1065 [2020-07-21 22:03:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:32,899 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 22:03:32,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:03:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 22:03:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2020-07-21 22:03:32,913 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:32,914 INFO L422 BasicCegarLoop]: trace histogram [195, 195, 98, 97, 97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:33,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:33,127 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:33,128 INFO L82 PathProgramCache]: Analyzing trace with hash -638809117, now seen corresponding path program 8 times [2020-07-21 22:03:33,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:33,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444256348] [2020-07-21 22:03:33,128 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:33,425 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:03:33,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:33,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:03:33,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 98940 backedges. 1014 proven. 7724 refuted. 0 times theorem prover too weak. 90202 trivial. 0 not checked. [2020-07-21 22:03:34,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:39,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:40,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:40,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:41,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:42,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:42,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:42,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:42,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:42,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:42,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:42,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 98940 backedges. 1014 proven. 7816 refuted. 0 times theorem prover too weak. 90110 trivial. 0 not checked. [2020-07-21 22:03:43,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444256348] [2020-07-21 22:03:43,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:43,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 22:03:43,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262464200] [2020-07-21 22:03:43,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:03:43,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:43,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:03:43,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:03:43,331 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 22 states. [2020-07-21 22:03:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:44,083 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-21 22:03:44,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:03:44,084 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1274 [2020-07-21 22:03:44,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:44,089 INFO L225 Difference]: With dead ends: 102 [2020-07-21 22:03:44,089 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 22:03:44,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2557 GetRequests, 2509 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 22:03:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 22:03:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-21 22:03:44,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 22:03:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 22:03:44,104 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1274 [2020-07-21 22:03:44,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:44,105 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 22:03:44,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:03:44,106 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 22:03:44,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1689 [2020-07-21 22:03:44,133 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:44,133 INFO L422 BasicCegarLoop]: trace histogram [245, 245, 211, 122, 122, 122, 122, 122, 122, 122, 89, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:44,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:44,348 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:44,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:44,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1963331046, now seen corresponding path program 8 times [2020-07-21 22:03:44,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:44,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562839070] [2020-07-21 22:03:44,350 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:44,735 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:03:44,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:44,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:03:44,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:46,161 INFO L134 CoverageAnalysis]: Checked inductivity of 171239 backedges. 1790 proven. 10664 refuted. 0 times theorem prover too weak. 158785 trivial. 0 not checked. [2020-07-21 22:03:46,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:03:51,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:51,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:54,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:54,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:55,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:56,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:56,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:56,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:56,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:56,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:56,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:03:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 171239 backedges. 1800 proven. 10746 refuted. 0 times theorem prover too weak. 158693 trivial. 0 not checked. [2020-07-21 22:03:57,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562839070] [2020-07-21 22:03:57,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:03:57,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 22:03:57,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239164549] [2020-07-21 22:03:57,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:03:57,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:03:57,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:03:57,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:03:57,820 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 22 states. [2020-07-21 22:03:58,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:03:58,323 INFO L93 Difference]: Finished difference Result 245 states and 2197 transitions. [2020-07-21 22:03:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:03:58,324 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1688 [2020-07-21 22:03:58,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:03:58,330 INFO L225 Difference]: With dead ends: 245 [2020-07-21 22:03:58,330 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 22:03:58,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3384 GetRequests, 3336 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 22:03:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 22:03:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-21 22:03:58,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 22:03:58,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 94 transitions. [2020-07-21 22:03:58,355 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 94 transitions. Word has length 1688 [2020-07-21 22:03:58,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:03:58,355 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 94 transitions. [2020-07-21 22:03:58,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:03:58,355 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 94 transitions. [2020-07-21 22:03:58,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-07-21 22:03:58,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:03:58,364 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 97, 60, 60, 60, 60, 60, 60, 60, 37, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:03:58,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:58,579 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:03:58,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:03:58,579 INFO L82 PathProgramCache]: Analyzing trace with hash -260964346, now seen corresponding path program 9 times [2020-07-21 22:03:58,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:03:58,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968553551] [2020-07-21 22:03:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:03:58,902 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:03:58,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:03:58,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:03:58,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:03:59,243 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1287 proven. 4357 refuted. 0 times theorem prover too weak. 35132 trivial. 0 not checked. [2020-07-21 22:03:59,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:03,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:04,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:05,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:05,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:05,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:05,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:05,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:05,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:06,134 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:06,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:06,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:06,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:06,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1293 proven. 4443 refuted. 0 times theorem prover too weak. 35040 trivial. 0 not checked. [2020-07-21 22:04:06,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968553551] [2020-07-21 22:04:06,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:06,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 22:04:06,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29360503] [2020-07-21 22:04:06,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:04:06,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:06,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:04:06,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:04:06,846 INFO L87 Difference]: Start difference. First operand 69 states and 94 transitions. Second operand 22 states. [2020-07-21 22:04:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:07,303 INFO L93 Difference]: Finished difference Result 135 states and 195 transitions. [2020-07-21 22:04:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:04:07,304 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 830 [2020-07-21 22:04:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:07,307 INFO L225 Difference]: With dead ends: 135 [2020-07-21 22:04:07,307 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 22:04:07,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1668 GetRequests, 1620 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 22:04:07,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 22:04:07,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-07-21 22:04:07,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-21 22:04:07,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 122 transitions. [2020-07-21 22:04:07,324 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 122 transitions. Word has length 830 [2020-07-21 22:04:07,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:07,325 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 122 transitions. [2020-07-21 22:04:07,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:04:07,325 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 122 transitions. [2020-07-21 22:04:07,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-21 22:04:07,334 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:07,334 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:04:07,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:07,548 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:07,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:07,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 10 times [2020-07-21 22:04:07,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:07,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758676216] [2020-07-21 22:04:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:08,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 22:04:08,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:08,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 439 conjunts are in the unsatisfiable core [2020-07-21 22:04:08,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:09,034 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 22:04:09,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 22:04:21,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758676216] [2020-07-21 22:04:21,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:21,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 22:04:21,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67430829] [2020-07-21 22:04:21,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 22:04:21,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:21,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 22:04:21,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 22:04:21,281 INFO L87 Difference]: Start difference. First operand 87 states and 122 transitions. Second operand 36 states. [2020-07-21 22:04:22,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:22,291 INFO L93 Difference]: Finished difference Result 194 states and 324 transitions. [2020-07-21 22:04:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 22:04:22,292 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2020-07-21 22:04:22,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:22,300 INFO L225 Difference]: With dead ends: 194 [2020-07-21 22:04:22,301 INFO L226 Difference]: Without dead ends: 187 [2020-07-21 22:04:22,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1455 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=1313, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 22:04:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-21 22:04:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 147. [2020-07-21 22:04:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 22:04:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 255 transitions. [2020-07-21 22:04:22,337 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 255 transitions. Word has length 749 [2020-07-21 22:04:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:22,338 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 255 transitions. [2020-07-21 22:04:22,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 22:04:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 255 transitions. [2020-07-21 22:04:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 839 [2020-07-21 22:04:22,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:22,353 INFO L422 BasicCegarLoop]: trace histogram [123, 123, 93, 61, 61, 61, 61, 61, 61, 61, 32, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:04:22,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:22,568 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:22,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:22,569 INFO L82 PathProgramCache]: Analyzing trace with hash 593699595, now seen corresponding path program 11 times [2020-07-21 22:04:22,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:22,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582909266] [2020-07-21 22:04:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:22,966 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:04:22,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:22,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:04:22,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 41610 backedges. 1098 proven. 4596 refuted. 0 times theorem prover too weak. 35916 trivial. 0 not checked. [2020-07-21 22:04:23,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:27,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:29,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:30,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:30,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:30,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:30,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:30,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:31,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:31,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:31,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:31,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:31,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:31,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 41610 backedges. 1106 proven. 4680 refuted. 0 times theorem prover too weak. 35824 trivial. 0 not checked. [2020-07-21 22:04:31,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582909266] [2020-07-21 22:04:31,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:31,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 22:04:31,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21966907] [2020-07-21 22:04:31,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:04:31,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:31,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:04:31,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:04:31,658 INFO L87 Difference]: Start difference. First operand 147 states and 255 transitions. Second operand 22 states. [2020-07-21 22:04:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:32,062 INFO L93 Difference]: Finished difference Result 197 states and 341 transitions. [2020-07-21 22:04:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:04:32,063 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 838 [2020-07-21 22:04:32,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:32,067 INFO L225 Difference]: With dead ends: 197 [2020-07-21 22:04:32,067 INFO L226 Difference]: Without dead ends: 150 [2020-07-21 22:04:32,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1684 GetRequests, 1636 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 22:04:32,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-21 22:04:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 131. [2020-07-21 22:04:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 22:04:32,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 221 transitions. [2020-07-21 22:04:32,096 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 221 transitions. Word has length 838 [2020-07-21 22:04:32,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:32,097 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 221 transitions. [2020-07-21 22:04:32,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:04:32,097 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 221 transitions. [2020-07-21 22:04:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-07-21 22:04:32,109 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:32,110 INFO L422 BasicCegarLoop]: trace histogram [125, 125, 88, 62, 62, 62, 62, 62, 62, 62, 37, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:04:32,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:32,325 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:32,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:32,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1679468380, now seen corresponding path program 12 times [2020-07-21 22:04:32,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:32,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888426320] [2020-07-21 22:04:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:32,768 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:04:32,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:32,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 22:04:32,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:33,173 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1025 proven. 4305 refuted. 0 times theorem prover too weak. 37062 trivial. 0 not checked. [2020-07-21 22:04:33,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:37,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:37,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:38,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:38,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:39,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:39,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:39,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:40,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:40,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:40,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:40,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1028 proven. 4372 refuted. 0 times theorem prover too weak. 36992 trivial. 0 not checked. [2020-07-21 22:04:40,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888426320] [2020-07-21 22:04:40,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:40,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 22:04:40,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101909982] [2020-07-21 22:04:40,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:04:40,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:40,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:04:40,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:04:40,774 INFO L87 Difference]: Start difference. First operand 131 states and 221 transitions. Second operand 22 states. [2020-07-21 22:04:41,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:41,316 INFO L93 Difference]: Finished difference Result 292 states and 547 transitions. [2020-07-21 22:04:41,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:04:41,318 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 845 [2020-07-21 22:04:41,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:41,324 INFO L225 Difference]: With dead ends: 292 [2020-07-21 22:04:41,324 INFO L226 Difference]: Without dead ends: 131 [2020-07-21 22:04:41,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1697 GetRequests, 1652 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:04:41,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-07-21 22:04:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-07-21 22:04:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 22:04:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 207 transitions. [2020-07-21 22:04:41,367 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 207 transitions. Word has length 845 [2020-07-21 22:04:41,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:41,367 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 207 transitions. [2020-07-21 22:04:41,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:04:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 207 transitions. [2020-07-21 22:04:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 22:04:41,381 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:41,381 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:04:41,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:41,596 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:41,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:41,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1934761414, now seen corresponding path program 13 times [2020-07-21 22:04:41,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:41,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752508556] [2020-07-21 22:04:41,597 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:42,121 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:04:42,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:42,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1292 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 22:04:42,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:42,488 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1757 proven. 1940 refuted. 0 times theorem prover too weak. 31603 trivial. 0 not checked. [2020-07-21 22:04:42,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:45,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:45,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:45,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:45,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:46,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:46,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:46,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:46,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:46,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:46,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:46,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1762 proven. 1976 refuted. 0 times theorem prover too weak. 31562 trivial. 0 not checked. [2020-07-21 22:04:47,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752508556] [2020-07-21 22:04:47,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:47,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 22:04:47,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966341664] [2020-07-21 22:04:47,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:04:47,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:47,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:04:47,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:04:47,529 INFO L87 Difference]: Start difference. First operand 131 states and 207 transitions. Second operand 18 states. [2020-07-21 22:04:47,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:47,814 INFO L93 Difference]: Finished difference Result 176 states and 281 transitions. [2020-07-21 22:04:47,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:04:47,815 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 773 [2020-07-21 22:04:47,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:47,820 INFO L225 Difference]: With dead ends: 176 [2020-07-21 22:04:47,821 INFO L226 Difference]: Without dead ends: 164 [2020-07-21 22:04:47,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1551 GetRequests, 1516 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:04:47,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-21 22:04:47,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 142. [2020-07-21 22:04:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-21 22:04:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 224 transitions. [2020-07-21 22:04:47,848 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 224 transitions. Word has length 773 [2020-07-21 22:04:47,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:47,849 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 224 transitions. [2020-07-21 22:04:47,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:04:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 224 transitions. [2020-07-21 22:04:47,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-07-21 22:04:47,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:47,863 INFO L422 BasicCegarLoop]: trace histogram [125, 125, 88, 62, 62, 62, 62, 62, 62, 62, 37, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:04:48,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:48,078 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:48,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:48,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1485076642, now seen corresponding path program 14 times [2020-07-21 22:04:48,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:48,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850640031] [2020-07-21 22:04:48,080 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:48,557 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:04:48,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:48,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:04:48,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:48,968 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1019 proven. 3681 refuted. 0 times theorem prover too weak. 37692 trivial. 0 not checked. [2020-07-21 22:04:48,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:52,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:53,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:54,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:54,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:54,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:54,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:54,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:54,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:54,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:54,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:54,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42392 backedges. 1029 proven. 3724 refuted. 0 times theorem prover too weak. 37639 trivial. 0 not checked. [2020-07-21 22:04:55,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850640031] [2020-07-21 22:04:55,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:04:55,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 22:04:55,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226852023] [2020-07-21 22:04:55,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:04:55,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:04:55,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:04:55,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:04:55,355 INFO L87 Difference]: Start difference. First operand 142 states and 224 transitions. Second operand 20 states. [2020-07-21 22:04:55,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:04:55,697 INFO L93 Difference]: Finished difference Result 183 states and 294 transitions. [2020-07-21 22:04:55,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:04:55,698 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 845 [2020-07-21 22:04:55,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:04:55,702 INFO L225 Difference]: With dead ends: 183 [2020-07-21 22:04:55,702 INFO L226 Difference]: Without dead ends: 156 [2020-07-21 22:04:55,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1696 GetRequests, 1656 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:04:55,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-21 22:04:55,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2020-07-21 22:04:55,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 22:04:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 210 transitions. [2020-07-21 22:04:55,730 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 210 transitions. Word has length 845 [2020-07-21 22:04:55,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:04:55,730 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 210 transitions. [2020-07-21 22:04:55,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:04:55,730 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 210 transitions. [2020-07-21 22:04:55,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2020-07-21 22:04:55,744 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:04:55,745 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 90, 56, 56, 56, 56, 56, 56, 56, 34, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:04:55,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:55,961 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:04:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:04:55,962 INFO L82 PathProgramCache]: Analyzing trace with hash 729478484, now seen corresponding path program 15 times [2020-07-21 22:04:55,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:04:55,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383419356] [2020-07-21 22:04:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:04:56,426 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:04:56,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:04:56,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:04:56,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:04:56,778 INFO L134 CoverageAnalysis]: Checked inductivity of 35477 backedges. 1085 proven. 3209 refuted. 0 times theorem prover too weak. 31183 trivial. 0 not checked. [2020-07-21 22:04:56,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:04:59,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:04:59,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:01,102 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:01,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:01,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:01,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:02,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:02,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:02,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:02,388 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 35477 backedges. 1093 proven. 3254 refuted. 0 times theorem prover too weak. 31130 trivial. 0 not checked. [2020-07-21 22:05:02,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383419356] [2020-07-21 22:05:02,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:02,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 22:05:02,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093715962] [2020-07-21 22:05:02,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:05:02,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:02,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:05:02,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:05:02,889 INFO L87 Difference]: Start difference. First operand 134 states and 210 transitions. Second operand 20 states. [2020-07-21 22:05:03,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:03,199 INFO L93 Difference]: Finished difference Result 193 states and 302 transitions. [2020-07-21 22:05:03,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:05:03,206 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 775 [2020-07-21 22:05:03,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:03,210 INFO L225 Difference]: With dead ends: 193 [2020-07-21 22:05:03,210 INFO L226 Difference]: Without dead ends: 171 [2020-07-21 22:05:03,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1556 GetRequests, 1516 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:05:03,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-07-21 22:05:03,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 131. [2020-07-21 22:05:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 22:05:03,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 207 transitions. [2020-07-21 22:05:03,237 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 207 transitions. Word has length 775 [2020-07-21 22:05:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:03,238 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 207 transitions. [2020-07-21 22:05:03,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:05:03,238 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 207 transitions. [2020-07-21 22:05:03,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2020-07-21 22:05:03,248 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:03,249 INFO L422 BasicCegarLoop]: trace histogram [115, 115, 90, 57, 57, 57, 57, 57, 57, 57, 33, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:03,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:03,464 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:03,465 INFO L82 PathProgramCache]: Analyzing trace with hash -139992959, now seen corresponding path program 16 times [2020-07-21 22:05:03,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:03,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509854192] [2020-07-21 22:05:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:03,938 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:05:03,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:03,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 22:05:03,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36609 backedges. 1016 proven. 3930 refuted. 0 times theorem prover too weak. 31663 trivial. 0 not checked. [2020-07-21 22:05:04,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:08,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:09,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:10,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:10,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:11,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:11,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:11,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:11,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:11,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:11,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:11,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36609 backedges. 1017 proven. 3999 refuted. 0 times theorem prover too weak. 31593 trivial. 0 not checked. [2020-07-21 22:05:11,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509854192] [2020-07-21 22:05:11,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:11,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 22:05:11,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805177178] [2020-07-21 22:05:11,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:05:11,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:11,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:05:11,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:05:11,900 INFO L87 Difference]: Start difference. First operand 131 states and 207 transitions. Second operand 22 states. [2020-07-21 22:05:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:12,307 INFO L93 Difference]: Finished difference Result 167 states and 259 transitions. [2020-07-21 22:05:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:05:12,308 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 787 [2020-07-21 22:05:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:12,312 INFO L225 Difference]: With dead ends: 167 [2020-07-21 22:05:12,312 INFO L226 Difference]: Without dead ends: 140 [2020-07-21 22:05:12,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1581 GetRequests, 1536 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:05:12,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-21 22:05:12,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 131. [2020-07-21 22:05:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 22:05:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 205 transitions. [2020-07-21 22:05:12,335 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 205 transitions. Word has length 787 [2020-07-21 22:05:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:12,335 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 205 transitions. [2020-07-21 22:05:12,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:05:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 205 transitions. [2020-07-21 22:05:12,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 22:05:12,346 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:12,346 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:12,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:12,561 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:12,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1169932622, now seen corresponding path program 17 times [2020-07-21 22:05:12,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:12,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194464607] [2020-07-21 22:05:12,562 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:13,129 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:05:13,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:13,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 832 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:05:13,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 1399 proven. 3113 refuted. 0 times theorem prover too weak. 28672 trivial. 0 not checked. [2020-07-21 22:05:13,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:17,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:18,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:19,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:19,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:19,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:19,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:19,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:19,809 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:19,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:19,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 1413 proven. 3171 refuted. 0 times theorem prover too weak. 28600 trivial. 0 not checked. [2020-07-21 22:05:20,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194464607] [2020-07-21 22:05:20,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:20,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 22:05:20,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198307885] [2020-07-21 22:05:20,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:05:20,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:20,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:05:20,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:05:20,636 INFO L87 Difference]: Start difference. First operand 131 states and 205 transitions. Second operand 20 states. [2020-07-21 22:05:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:21,118 INFO L93 Difference]: Finished difference Result 190 states and 297 transitions. [2020-07-21 22:05:21,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:05:21,120 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 750 [2020-07-21 22:05:21,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:21,124 INFO L225 Difference]: With dead ends: 190 [2020-07-21 22:05:21,125 INFO L226 Difference]: Without dead ends: 173 [2020-07-21 22:05:21,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1507 GetRequests, 1464 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:05:21,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-21 22:05:21,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 149. [2020-07-21 22:05:21,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 22:05:21,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 236 transitions. [2020-07-21 22:05:21,157 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 236 transitions. Word has length 750 [2020-07-21 22:05:21,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:21,157 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 236 transitions. [2020-07-21 22:05:21,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:05:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 236 transitions. [2020-07-21 22:05:21,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 811 [2020-07-21 22:05:21,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:21,173 INFO L422 BasicCegarLoop]: trace histogram [119, 119, 89, 59, 59, 59, 59, 59, 59, 59, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:21,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:21,387 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:21,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:21,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1728748625, now seen corresponding path program 18 times [2020-07-21 22:05:21,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:21,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66128810] [2020-07-21 22:05:21,388 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:21,959 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:05:21,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:21,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 22:05:21,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 38844 backedges. 1206 proven. 3892 refuted. 0 times theorem prover too weak. 33746 trivial. 0 not checked. [2020-07-21 22:05:22,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:26,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:28,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:28,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:29,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:29,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:29,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:29,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:30,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:30,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:30,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:30,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:30,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:30,732 INFO L134 CoverageAnalysis]: Checked inductivity of 38844 backedges. 1205 proven. 3963 refuted. 0 times theorem prover too weak. 33676 trivial. 0 not checked. [2020-07-21 22:05:30,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66128810] [2020-07-21 22:05:30,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:30,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 22:05:30,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139816607] [2020-07-21 22:05:30,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:05:30,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:30,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:05:30,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:05:30,734 INFO L87 Difference]: Start difference. First operand 149 states and 236 transitions. Second operand 22 states. [2020-07-21 22:05:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:31,149 INFO L93 Difference]: Finished difference Result 204 states and 314 transitions. [2020-07-21 22:05:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:05:31,151 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 810 [2020-07-21 22:05:31,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:31,156 INFO L225 Difference]: With dead ends: 204 [2020-07-21 22:05:31,156 INFO L226 Difference]: Without dead ends: 182 [2020-07-21 22:05:31,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1627 GetRequests, 1582 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:05:31,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-07-21 22:05:31,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-07-21 22:05:31,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-07-21 22:05:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 213 transitions. [2020-07-21 22:05:31,184 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 213 transitions. Word has length 810 [2020-07-21 22:05:31,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:31,184 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 213 transitions. [2020-07-21 22:05:31,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:05:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 213 transitions. [2020-07-21 22:05:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 776 [2020-07-21 22:05:31,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:31,197 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 90, 56, 56, 56, 56, 56, 56, 56, 34, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:31,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:31,411 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:31,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:31,411 INFO L82 PathProgramCache]: Analyzing trace with hash 657681720, now seen corresponding path program 19 times [2020-07-21 22:05:31,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:31,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473920564] [2020-07-21 22:05:31,412 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:32,052 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:05:32,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:32,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:05:32,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 35477 backedges. 2095 proven. 2577 refuted. 0 times theorem prover too weak. 30805 trivial. 0 not checked. [2020-07-21 22:05:32,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:36,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:36,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:37,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:37,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:37,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:37,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:38,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:38,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:38,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:38,514 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:38,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:38,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:38,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 35477 backedges. 2107 proven. 2637 refuted. 0 times theorem prover too weak. 30733 trivial. 0 not checked. [2020-07-21 22:05:39,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473920564] [2020-07-21 22:05:39,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:39,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 22:05:39,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353998222] [2020-07-21 22:05:39,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:05:39,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:05:39,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:05:39,888 INFO L87 Difference]: Start difference. First operand 136 states and 213 transitions. Second operand 20 states. [2020-07-21 22:05:40,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:40,334 INFO L93 Difference]: Finished difference Result 195 states and 301 transitions. [2020-07-21 22:05:40,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:05:40,336 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 775 [2020-07-21 22:05:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:40,341 INFO L225 Difference]: With dead ends: 195 [2020-07-21 22:05:40,341 INFO L226 Difference]: Without dead ends: 183 [2020-07-21 22:05:40,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1557 GetRequests, 1514 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:05:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-07-21 22:05:40,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 141. [2020-07-21 22:05:40,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-21 22:05:40,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 219 transitions. [2020-07-21 22:05:40,370 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 219 transitions. Word has length 775 [2020-07-21 22:05:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:40,370 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 219 transitions. [2020-07-21 22:05:40,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:05:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 219 transitions. [2020-07-21 22:05:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2020-07-21 22:05:40,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:40,383 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 89, 56, 56, 56, 56, 56, 56, 56, 33, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:40,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:40,597 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:40,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:40,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1476570892, now seen corresponding path program 20 times [2020-07-21 22:05:40,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:40,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344076145] [2020-07-21 22:05:40,598 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:41,290 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:05:41,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:41,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:05:41,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 35388 backedges. 1366 proven. 2921 refuted. 0 times theorem prover too weak. 31101 trivial. 0 not checked. [2020-07-21 22:05:41,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:45,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:46,583 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 22:05:46,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:47,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:47,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:47,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:47,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:47,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:47,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:47,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:47,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:48,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:48,852 INFO L134 CoverageAnalysis]: Checked inductivity of 35388 backedges. 1372 proven. 2968 refuted. 0 times theorem prover too weak. 31048 trivial. 0 not checked. [2020-07-21 22:05:48,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344076145] [2020-07-21 22:05:48,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:48,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 22:05:48,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095290824] [2020-07-21 22:05:48,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:05:48,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:48,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:05:48,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:05:48,855 INFO L87 Difference]: Start difference. First operand 141 states and 219 transitions. Second operand 20 states. [2020-07-21 22:05:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:49,396 INFO L93 Difference]: Finished difference Result 236 states and 373 transitions. [2020-07-21 22:05:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:05:49,398 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 774 [2020-07-21 22:05:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:49,406 INFO L225 Difference]: With dead ends: 236 [2020-07-21 22:05:49,406 INFO L226 Difference]: Without dead ends: 209 [2020-07-21 22:05:49,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1554 GetRequests, 1514 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:05:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-21 22:05:49,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 167. [2020-07-21 22:05:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-07-21 22:05:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 263 transitions. [2020-07-21 22:05:49,460 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 263 transitions. Word has length 774 [2020-07-21 22:05:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:49,461 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 263 transitions. [2020-07-21 22:05:49,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:05:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 263 transitions. [2020-07-21 22:05:49,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 22:05:49,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:49,478 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:49,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:49,693 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:49,694 INFO L82 PathProgramCache]: Analyzing trace with hash -193438124, now seen corresponding path program 21 times [2020-07-21 22:05:49,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:49,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588695851] [2020-07-21 22:05:49,695 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:50,409 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:05:50,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:50,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:05:50,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:05:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3182 proven. 1330 refuted. 0 times theorem prover too weak. 28672 trivial. 0 not checked. [2020-07-21 22:05:50,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:05:53,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:54,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:54,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:55,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:55,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:55,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:55,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:56,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:56,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:56,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:56,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:05:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3192 proven. 1392 refuted. 0 times theorem prover too weak. 28600 trivial. 0 not checked. [2020-07-21 22:05:58,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588695851] [2020-07-21 22:05:58,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:05:58,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 22:05:58,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091489495] [2020-07-21 22:05:58,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:05:58,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:05:58,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:05:58,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:05:58,205 INFO L87 Difference]: Start difference. First operand 167 states and 263 transitions. Second operand 20 states. [2020-07-21 22:05:58,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:05:58,605 INFO L93 Difference]: Finished difference Result 244 states and 382 transitions. [2020-07-21 22:05:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:05:58,605 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 750 [2020-07-21 22:05:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:05:58,611 INFO L225 Difference]: With dead ends: 244 [2020-07-21 22:05:58,611 INFO L226 Difference]: Without dead ends: 237 [2020-07-21 22:05:58,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1507 GetRequests, 1464 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:05:58,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-21 22:05:58,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 172. [2020-07-21 22:05:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-07-21 22:05:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 270 transitions. [2020-07-21 22:05:58,642 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 270 transitions. Word has length 750 [2020-07-21 22:05:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:05:58,643 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 270 transitions. [2020-07-21 22:05:58,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:05:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 270 transitions. [2020-07-21 22:05:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 22:05:58,656 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:05:58,656 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:05:58,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:58,870 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:05:58,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:05:58,871 INFO L82 PathProgramCache]: Analyzing trace with hash -2114547388, now seen corresponding path program 22 times [2020-07-21 22:05:58,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:05:58,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995473781] [2020-07-21 22:05:58,872 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:05:59,575 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:05:59,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:05:59,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:05:59,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:06:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1926 proven. 2354 refuted. 0 times theorem prover too weak. 31020 trivial. 0 not checked. [2020-07-21 22:06:00,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:06:03,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:04,427 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 22:06:04,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:04,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:05,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:05,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:05,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:05,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:05,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:05,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:05,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:05,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:05,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:06,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1930 proven. 2403 refuted. 0 times theorem prover too weak. 30967 trivial. 0 not checked. [2020-07-21 22:06:07,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995473781] [2020-07-21 22:06:07,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:06:07,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 22:06:07,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913635092] [2020-07-21 22:06:07,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:06:07,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:06:07,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:06:07,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:06:07,011 INFO L87 Difference]: Start difference. First operand 172 states and 270 transitions. Second operand 20 states. [2020-07-21 22:06:07,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:06:07,424 INFO L93 Difference]: Finished difference Result 264 states and 409 transitions. [2020-07-21 22:06:07,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:06:07,426 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 773 [2020-07-21 22:06:07,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:06:07,431 INFO L225 Difference]: With dead ends: 264 [2020-07-21 22:06:07,432 INFO L226 Difference]: Without dead ends: 247 [2020-07-21 22:06:07,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1552 GetRequests, 1512 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:06:07,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-07-21 22:06:07,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 182. [2020-07-21 22:06:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-21 22:06:07,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 282 transitions. [2020-07-21 22:06:07,465 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 282 transitions. Word has length 773 [2020-07-21 22:06:07,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:06:07,466 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 282 transitions. [2020-07-21 22:06:07,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:06:07,466 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 282 transitions. [2020-07-21 22:06:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 22:06:07,479 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:06:07,479 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:06:07,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:07,692 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:06:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:06:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1764616954, now seen corresponding path program 23 times [2020-07-21 22:06:07,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:06:07,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618875362] [2020-07-21 22:06:07,694 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:08,411 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:06:08,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:06:08,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 859 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 22:06:08,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:06:08,759 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1516 proven. 3334 refuted. 0 times theorem prover too weak. 30450 trivial. 0 not checked. [2020-07-21 22:06:08,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:06:13,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:14,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:15,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:15,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:16,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:16,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:16,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:16,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:16,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1513 proven. 3407 refuted. 0 times theorem prover too weak. 30380 trivial. 0 not checked. [2020-07-21 22:06:17,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618875362] [2020-07-21 22:06:17,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:06:17,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 22:06:17,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733387583] [2020-07-21 22:06:17,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:06:17,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:06:17,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:06:17,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:06:17,327 INFO L87 Difference]: Start difference. First operand 182 states and 282 transitions. Second operand 22 states. [2020-07-21 22:06:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:06:17,793 INFO L93 Difference]: Finished difference Result 316 states and 484 transitions. [2020-07-21 22:06:17,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:06:17,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 773 [2020-07-21 22:06:17,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:06:17,801 INFO L225 Difference]: With dead ends: 316 [2020-07-21 22:06:17,801 INFO L226 Difference]: Without dead ends: 286 [2020-07-21 22:06:17,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1508 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:06:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-07-21 22:06:17,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 187. [2020-07-21 22:06:17,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-21 22:06:17,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 289 transitions. [2020-07-21 22:06:17,836 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 289 transitions. Word has length 773 [2020-07-21 22:06:17,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:06:17,837 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 289 transitions. [2020-07-21 22:06:17,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:06:17,837 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 289 transitions. [2020-07-21 22:06:17,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 22:06:17,849 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:06:17,850 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:06:18,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:18,064 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:06:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:06:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1953028691, now seen corresponding path program 24 times [2020-07-21 22:06:18,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:06:18,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592908627] [2020-07-21 22:06:18,066 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:18,806 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:06:18,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:06:18,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 22:06:18,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:06:19,160 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2164 proven. 2606 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 22:06:19,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:06:23,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:23,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:24,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:24,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:25,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:25,963 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:26,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:26,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:26,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:26,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:26,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:26,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2159 proven. 2681 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 22:06:28,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592908627] [2020-07-21 22:06:28,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:06:28,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 22:06:28,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682127985] [2020-07-21 22:06:28,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:06:28,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:06:28,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:06:28,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:06:28,074 INFO L87 Difference]: Start difference. First operand 187 states and 289 transitions. Second operand 22 states. [2020-07-21 22:06:28,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:06:28,630 INFO L93 Difference]: Finished difference Result 388 states and 600 transitions. [2020-07-21 22:06:28,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:06:28,632 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 22:06:28,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:06:28,640 INFO L225 Difference]: With dead ends: 388 [2020-07-21 22:06:28,641 INFO L226 Difference]: Without dead ends: 371 [2020-07-21 22:06:28,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:06:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-07-21 22:06:28,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 156. [2020-07-21 22:06:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-07-21 22:06:28,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 237 transitions. [2020-07-21 22:06:28,680 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 237 transitions. Word has length 761 [2020-07-21 22:06:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:06:28,680 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 237 transitions. [2020-07-21 22:06:28,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:06:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 237 transitions. [2020-07-21 22:06:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 22:06:28,691 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:06:28,691 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:06:28,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:28,906 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:06:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:06:28,907 INFO L82 PathProgramCache]: Analyzing trace with hash -435112683, now seen corresponding path program 25 times [2020-07-21 22:06:28,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:06:28,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878710784] [2020-07-21 22:06:28,907 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:29,744 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:06:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:06:29,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 22:06:29,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:06:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2984 proven. 1226 refuted. 0 times theorem prover too weak. 29978 trivial. 0 not checked. [2020-07-21 22:06:30,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:06:33,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:33,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:34,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:34,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:34,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:34,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:35,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:35,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:35,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:35,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:35,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:36,260 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 2986 proven. 1277 refuted. 0 times theorem prover too weak. 29925 trivial. 0 not checked. [2020-07-21 22:06:38,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878710784] [2020-07-21 22:06:38,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:06:38,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 22:06:38,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972613279] [2020-07-21 22:06:38,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:06:38,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:06:38,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:06:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:06:38,419 INFO L87 Difference]: Start difference. First operand 156 states and 237 transitions. Second operand 20 states. [2020-07-21 22:06:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:06:38,932 INFO L93 Difference]: Finished difference Result 302 states and 461 transitions. [2020-07-21 22:06:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:06:38,932 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 761 [2020-07-21 22:06:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:06:38,940 INFO L225 Difference]: With dead ends: 302 [2020-07-21 22:06:38,940 INFO L226 Difference]: Without dead ends: 295 [2020-07-21 22:06:38,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1528 GetRequests, 1488 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:06:38,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-07-21 22:06:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 179. [2020-07-21 22:06:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-07-21 22:06:38,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 271 transitions. [2020-07-21 22:06:38,975 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 271 transitions. Word has length 761 [2020-07-21 22:06:38,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:06:38,975 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 271 transitions. [2020-07-21 22:06:38,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:06:38,976 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 271 transitions. [2020-07-21 22:06:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 22:06:38,983 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:06:38,983 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:06:39,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:39,184 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:06:39,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:06:39,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1365832043, now seen corresponding path program 26 times [2020-07-21 22:06:39,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:06:39,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808029971] [2020-07-21 22:06:39,186 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:40,057 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:06:40,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:06:40,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 22:06:40,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:06:40,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3378 proven. 1392 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 22:06:40,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:06:44,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:45,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:46,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:46,802 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:46,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:47,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:47,078 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:47,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:47,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:47,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:47,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:47,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3371 proven. 1469 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 22:06:49,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808029971] [2020-07-21 22:06:49,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:06:49,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 22:06:49,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639030642] [2020-07-21 22:06:49,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:06:49,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:06:49,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:06:49,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:06:49,699 INFO L87 Difference]: Start difference. First operand 179 states and 271 transitions. Second operand 22 states. [2020-07-21 22:06:50,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:06:50,225 INFO L93 Difference]: Finished difference Result 433 states and 670 transitions. [2020-07-21 22:06:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:06:50,227 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 22:06:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:06:50,236 INFO L225 Difference]: With dead ends: 433 [2020-07-21 22:06:50,236 INFO L226 Difference]: Without dead ends: 371 [2020-07-21 22:06:50,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:06:50,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-07-21 22:06:50,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 101. [2020-07-21 22:06:50,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-21 22:06:50,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 149 transitions. [2020-07-21 22:06:50,265 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 149 transitions. Word has length 761 [2020-07-21 22:06:50,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:06:50,265 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 149 transitions. [2020-07-21 22:06:50,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:06:50,265 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 149 transitions. [2020-07-21 22:06:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 22:06:50,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:06:50,271 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:06:50,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:50,485 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:06:50,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:06:50,485 INFO L82 PathProgramCache]: Analyzing trace with hash 19782726, now seen corresponding path program 27 times [2020-07-21 22:06:50,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:06:50,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909836647] [2020-07-21 22:06:50,485 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:06:51,224 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:06:51,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:06:51,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:06:51,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:06:51,631 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 805 proven. 4251 refuted. 0 times theorem prover too weak. 28128 trivial. 0 not checked. [2020-07-21 22:06:51,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:06:56,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:56,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:58,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:59,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:59,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:06:59,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:00,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:00,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:00,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:00,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:00,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 819 proven. 4329 refuted. 0 times theorem prover too weak. 28036 trivial. 0 not checked. [2020-07-21 22:07:00,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909836647] [2020-07-21 22:07:00,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:07:00,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 22:07:00,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843067573] [2020-07-21 22:07:00,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:07:00,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:00,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:07:00,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:07:00,781 INFO L87 Difference]: Start difference. First operand 101 states and 149 transitions. Second operand 22 states. [2020-07-21 22:07:01,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:01,336 INFO L93 Difference]: Finished difference Result 271 states and 409 transitions. [2020-07-21 22:07:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:07:01,338 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 750 [2020-07-21 22:07:01,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:01,343 INFO L225 Difference]: With dead ends: 271 [2020-07-21 22:07:01,343 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 22:07:01,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 1460 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 22:07:01,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 22:07:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-07-21 22:07:01,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 22:07:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2020-07-21 22:07:01,359 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 750 [2020-07-21 22:07:01,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:01,359 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2020-07-21 22:07:01,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:07:01,359 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2020-07-21 22:07:01,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 22:07:01,366 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:01,366 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:07:01,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:01,576 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:01,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:01,577 INFO L82 PathProgramCache]: Analyzing trace with hash 795943445, now seen corresponding path program 28 times [2020-07-21 22:07:01,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:01,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550756105] [2020-07-21 22:07:01,577 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:02,348 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:07:02,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:02,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 22:07:02,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 872 proven. 3898 refuted. 0 times theorem prover too weak. 29418 trivial. 0 not checked. [2020-07-21 22:07:02,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:07:07,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:08,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:09,903 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:09,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:10,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:10,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:10,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:10,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:11,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:11,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:11,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:11,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 877 proven. 3963 refuted. 0 times theorem prover too weak. 29348 trivial. 0 not checked. [2020-07-21 22:07:11,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550756105] [2020-07-21 22:07:11,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:07:11,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 22:07:11,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353246326] [2020-07-21 22:07:11,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:07:11,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:11,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:07:11,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:07:11,502 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 22 states. [2020-07-21 22:07:11,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:11,933 INFO L93 Difference]: Finished difference Result 135 states and 162 transitions. [2020-07-21 22:07:11,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:07:11,934 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 761 [2020-07-21 22:07:11,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:11,937 INFO L225 Difference]: With dead ends: 135 [2020-07-21 22:07:11,937 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 22:07:11,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1529 GetRequests, 1484 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:07:11,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 22:07:11,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-07-21 22:07:11,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-21 22:07:11,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-07-21 22:07:11,946 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 761 [2020-07-21 22:07:11,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:11,946 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-07-21 22:07:11,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:07:11,947 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-07-21 22:07:11,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 22:07:11,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:07:11,951 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:07:12,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:12,152 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:07:12,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:07:12,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1599781781, now seen corresponding path program 29 times [2020-07-21 22:07:12,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:07:12,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246035288] [2020-07-21 22:07:12,153 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:12,977 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:07:12,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:07:12,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-21 22:07:12,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:07:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 883 proven. 4434 refuted. 0 times theorem prover too weak. 28871 trivial. 0 not checked. [2020-07-21 22:07:13,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:07:18,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:20,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:22,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:22,853 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:22,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:23,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:23,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:23,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:23,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:07:24,329 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 875 proven. 4534 refuted. 0 times theorem prover too weak. 28779 trivial. 0 not checked. [2020-07-21 22:07:24,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246035288] [2020-07-21 22:07:24,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:07:24,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 24 [2020-07-21 22:07:24,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209062355] [2020-07-21 22:07:24,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:07:24,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:07:24,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:07:24,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:07:24,331 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 24 states. [2020-07-21 22:07:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:07:25,036 INFO L93 Difference]: Finished difference Result 219 states and 262 transitions. [2020-07-21 22:07:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:07:25,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 761 [2020-07-21 22:07:25,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:07:25,041 INFO L225 Difference]: With dead ends: 219 [2020-07-21 22:07:25,041 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 22:07:25,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1530 GetRequests, 1480 SyntacticMatches, 19 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:07:25,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 22:07:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 22:07:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 22:07:25,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 22:07:25,048 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 761 [2020-07-21 22:07:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:07:25,049 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 22:07:25,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:07:25,049 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 22:07:25,049 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 22:07:25,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:07:25,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 22:07:26,862 WARN L193 SmtUtils]: Spent 914.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 76 [2020-07-21 22:07:33,368 WARN L193 SmtUtils]: Spent 6.50 s on a formula simplification. DAG size of input: 690 DAG size of output: 273 [2020-07-21 22:07:33,534 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:07:39,844 WARN L193 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:07:45,549 WARN L193 SmtUtils]: Spent 5.70 s on a formula simplification. DAG size of input: 701 DAG size of output: 282 [2020-07-21 22:07:51,661 WARN L193 SmtUtils]: Spent 6.11 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:07:52,263 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 111 [2020-07-21 22:07:52,728 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 22:07:58,888 WARN L193 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:07:59,034 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:07:59,355 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 76 [2020-07-21 22:08:05,605 WARN L193 SmtUtils]: Spent 6.25 s on a formula simplification. DAG size of input: 689 DAG size of output: 272 [2020-07-21 22:08:06,064 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 22:08:06,883 WARN L193 SmtUtils]: Spent 816.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 127 [2020-07-21 22:08:13,053 WARN L193 SmtUtils]: Spent 6.17 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:08:15,237 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 526 DAG size of output: 182 [2020-07-21 22:08:20,892 WARN L193 SmtUtils]: Spent 5.65 s on a formula simplification. DAG size of input: 693 DAG size of output: 281 [2020-07-21 22:08:26,507 WARN L193 SmtUtils]: Spent 5.61 s on a formula simplification. DAG size of input: 690 DAG size of output: 273 [2020-07-21 22:08:27,124 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 111 [2020-07-21 22:08:33,219 WARN L193 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:08:39,375 WARN L193 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:08:39,844 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 22:08:42,080 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 526 DAG size of output: 182 [2020-07-21 22:08:47,695 WARN L193 SmtUtils]: Spent 5.61 s on a formula simplification. DAG size of input: 690 DAG size of output: 273 [2020-07-21 22:08:48,558 WARN L193 SmtUtils]: Spent 860.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 127 [2020-07-21 22:08:54,292 WARN L193 SmtUtils]: Spent 5.73 s on a formula simplification. DAG size of input: 690 DAG size of output: 273 [2020-07-21 22:08:54,753 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 22:09:00,852 WARN L193 SmtUtils]: Spent 6.10 s on a formula simplification. DAG size of input: 714 DAG size of output: 282 [2020-07-21 22:09:06,264 WARN L193 SmtUtils]: Spent 5.41 s on a formula simplification. DAG size of input: 698 DAG size of output: 272 [2020-07-21 22:09:06,409 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:09:06,892 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 22:09:13,081 WARN L193 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:09:18,827 WARN L193 SmtUtils]: Spent 5.74 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:09:25,129 WARN L193 SmtUtils]: Spent 6.30 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:09:25,279 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:09:25,728 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 100 [2020-07-21 22:09:31,518 WARN L193 SmtUtils]: Spent 5.79 s on a formula simplification. DAG size of input: 690 DAG size of output: 273 [2020-07-21 22:09:37,755 WARN L193 SmtUtils]: Spent 6.23 s on a formula simplification. DAG size of input: 714 DAG size of output: 282 [2020-07-21 22:09:40,088 WARN L193 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 526 DAG size of output: 182 [2020-07-21 22:09:45,827 WARN L193 SmtUtils]: Spent 5.73 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:09:51,602 WARN L193 SmtUtils]: Spent 5.77 s on a formula simplification. DAG size of input: 690 DAG size of output: 273 [2020-07-21 22:09:57,407 WARN L193 SmtUtils]: Spent 5.80 s on a formula simplification. DAG size of input: 699 DAG size of output: 283 [2020-07-21 22:09:57,557 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:09:59,824 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 526 DAG size of output: 182 [2020-07-21 22:10:00,290 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 22:10:06,895 WARN L193 SmtUtils]: Spent 6.60 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:10:13,250 WARN L193 SmtUtils]: Spent 6.35 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:10:13,716 WARN L193 SmtUtils]: Spent 463.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 22:10:19,624 WARN L193 SmtUtils]: Spent 5.91 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:10:19,771 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:10:25,706 WARN L193 SmtUtils]: Spent 5.93 s on a formula simplification. DAG size of input: 699 DAG size of output: 283 [2020-07-21 22:10:32,084 WARN L193 SmtUtils]: Spent 6.37 s on a formula simplification. DAG size of input: 714 DAG size of output: 282 [2020-07-21 22:10:32,234 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:10:37,513 WARN L193 SmtUtils]: Spent 5.28 s on a formula simplification. DAG size of input: 651 DAG size of output: 264 [2020-07-21 22:10:44,104 WARN L193 SmtUtils]: Spent 6.59 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:10:44,258 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:10:44,719 WARN L193 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 100 [2020-07-21 22:10:49,771 WARN L193 SmtUtils]: Spent 5.05 s on a formula simplification. DAG size of input: 651 DAG size of output: 264 [2020-07-21 22:10:56,110 WARN L193 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:11:01,949 WARN L193 SmtUtils]: Spent 5.83 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:11:02,417 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 100 [2020-07-21 22:11:08,279 WARN L193 SmtUtils]: Spent 5.86 s on a formula simplification. DAG size of input: 699 DAG size of output: 283 [2020-07-21 22:11:14,270 WARN L193 SmtUtils]: Spent 5.99 s on a formula simplification. DAG size of input: 719 DAG size of output: 273 [2020-07-21 22:11:20,580 WARN L193 SmtUtils]: Spent 6.31 s on a formula simplification. DAG size of input: 714 DAG size of output: 282 [2020-07-21 22:11:26,553 WARN L193 SmtUtils]: Spent 5.97 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:11:26,705 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:11:27,189 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 22:11:27,371 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 66 [2020-07-21 22:11:27,522 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:11:28,013 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 22:11:34,378 WARN L193 SmtUtils]: Spent 6.36 s on a formula simplification. DAG size of input: 719 DAG size of output: 273 [2020-07-21 22:11:40,400 WARN L193 SmtUtils]: Spent 6.02 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:11:40,870 WARN L193 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 100 [2020-07-21 22:11:46,206 WARN L193 SmtUtils]: Spent 5.33 s on a formula simplification. DAG size of input: 651 DAG size of output: 264 [2020-07-21 22:11:46,357 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:11:46,512 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:11:53,114 WARN L193 SmtUtils]: Spent 6.60 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:11:53,267 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:11:59,269 WARN L193 SmtUtils]: Spent 6.00 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:12:05,856 WARN L193 SmtUtils]: Spent 6.58 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:12:06,030 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 22:12:11,934 WARN L193 SmtUtils]: Spent 5.90 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:12:12,114 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 22:12:12,265 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:12:18,385 WARN L193 SmtUtils]: Spent 6.12 s on a formula simplification. DAG size of input: 714 DAG size of output: 282 [2020-07-21 22:12:18,882 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 101 [2020-07-21 22:12:24,971 WARN L193 SmtUtils]: Spent 6.09 s on a formula simplification. DAG size of input: 719 DAG size of output: 273 [2020-07-21 22:12:30,807 WARN L193 SmtUtils]: Spent 5.83 s on a formula simplification. DAG size of input: 684 DAG size of output: 271 [2020-07-21 22:12:30,962 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:12:31,145 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 22:12:31,300 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:12:37,074 WARN L193 SmtUtils]: Spent 5.77 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:12:37,539 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 100 [2020-07-21 22:12:43,811 WARN L193 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 714 DAG size of output: 282 [2020-07-21 22:12:43,969 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:12:49,189 WARN L193 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 651 DAG size of output: 264 [2020-07-21 22:12:49,383 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 22:12:49,877 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 101 [2020-07-21 22:12:55,876 WARN L193 SmtUtils]: Spent 5.99 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:13:02,330 WARN L193 SmtUtils]: Spent 6.45 s on a formula simplification. DAG size of input: 720 DAG size of output: 283 [2020-07-21 22:13:02,487 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:13:02,673 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 22:13:03,172 WARN L193 SmtUtils]: Spent 495.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 101 [2020-07-21 22:13:08,415 WARN L193 SmtUtils]: Spent 5.24 s on a formula simplification. DAG size of input: 652 DAG size of output: 251 [2020-07-21 22:13:14,653 WARN L193 SmtUtils]: Spent 6.23 s on a formula simplification. DAG size of input: 719 DAG size of output: 273 [2020-07-21 22:13:20,107 WARN L193 SmtUtils]: Spent 5.45 s on a formula simplification. DAG size of input: 652 DAG size of output: 251 [2020-07-21 22:13:22,180 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 501 DAG size of output: 166 [2020-07-21 22:13:28,291 WARN L193 SmtUtils]: Spent 6.11 s on a formula simplification. DAG size of input: 684 DAG size of output: 271 [2020-07-21 22:13:29,187 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification. DAG size of input: 395 DAG size of output: 125 [2020-07-21 22:13:29,723 WARN L193 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 105 [2020-07-21 22:13:36,632 WARN L193 SmtUtils]: Spent 6.91 s on a formula simplification. DAG size of input: 720 DAG size of output: 283 [2020-07-21 22:13:37,136 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 340 DAG size of output: 101 [2020-07-21 22:13:43,417 WARN L193 SmtUtils]: Spent 6.28 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:13:43,571 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:13:44,064 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 101 [2020-07-21 22:13:45,556 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 459 DAG size of output: 149 [2020-07-21 22:13:50,705 WARN L193 SmtUtils]: Spent 5.15 s on a formula simplification. DAG size of input: 652 DAG size of output: 252 [2020-07-21 22:13:56,872 WARN L193 SmtUtils]: Spent 6.16 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:13:57,206 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 76 [2020-07-21 22:13:57,356 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:14:03,693 WARN L193 SmtUtils]: Spent 6.33 s on a formula simplification. DAG size of input: 719 DAG size of output: 273 [2020-07-21 22:14:10,425 WARN L193 SmtUtils]: Spent 6.73 s on a formula simplification. DAG size of input: 720 DAG size of output: 283 [2020-07-21 22:14:10,581 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:14:12,117 WARN L193 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 459 DAG size of output: 149 [2020-07-21 22:14:12,448 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 291 DAG size of output: 76 [2020-07-21 22:14:14,446 WARN L193 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 501 DAG size of output: 166 [2020-07-21 22:14:20,513 WARN L193 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 684 DAG size of output: 271 [2020-07-21 22:14:20,665 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:14:21,580 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 122 [2020-07-21 22:14:22,645 WARN L193 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 422 DAG size of output: 125 [2020-07-21 22:14:29,395 WARN L193 SmtUtils]: Spent 6.75 s on a formula simplification. DAG size of input: 720 DAG size of output: 283 [2020-07-21 22:14:29,891 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 101 [2020-07-21 22:14:36,166 WARN L193 SmtUtils]: Spent 6.27 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:14:37,377 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 438 DAG size of output: 138 [2020-07-21 22:14:42,800 WARN L193 SmtUtils]: Spent 5.42 s on a formula simplification. DAG size of input: 652 DAG size of output: 252 [2020-07-21 22:14:42,953 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:14:43,446 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 101 [2020-07-21 22:14:44,246 WARN L193 SmtUtils]: Spent 798.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 119 [2020-07-21 22:14:45,754 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 459 DAG size of output: 149 [2020-07-21 22:14:52,572 WARN L193 SmtUtils]: Spent 6.81 s on a formula simplification. DAG size of input: 720 DAG size of output: 284 [2020-07-21 22:14:52,726 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:14:59,129 WARN L193 SmtUtils]: Spent 6.40 s on a formula simplification. DAG size of input: 692 DAG size of output: 272 [2020-07-21 22:14:59,470 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 76 [2020-07-21 22:15:06,730 WARN L193 SmtUtils]: Spent 7.26 s on a formula simplification. DAG size of input: 720 DAG size of output: 284 [2020-07-21 22:15:08,302 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 459 DAG size of output: 149 [2020-07-21 22:15:14,085 WARN L193 SmtUtils]: Spent 5.78 s on a formula simplification. DAG size of input: 689 DAG size of output: 272 [2020-07-21 22:15:15,123 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 422 DAG size of output: 125 [2020-07-21 22:15:16,015 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 396 DAG size of output: 122 [2020-07-21 22:15:16,169 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:15:16,803 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 115 [2020-07-21 22:15:17,620 WARN L193 SmtUtils]: Spent 813.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 119 [2020-07-21 22:15:18,154 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 101 [2020-07-21 22:15:21,168 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 567 DAG size of output: 204 [2020-07-21 22:15:27,841 WARN L193 SmtUtils]: Spent 6.67 s on a formula simplification. DAG size of input: 720 DAG size of output: 284 [2020-07-21 22:15:35,731 WARN L193 SmtUtils]: Spent 7.88 s on a formula simplification. DAG size of input: 727 DAG size of output: 292 [2020-07-21 22:15:41,798 WARN L193 SmtUtils]: Spent 6.06 s on a formula simplification. DAG size of input: 684 DAG size of output: 271 [2020-07-21 22:15:41,962 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:15:42,309 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 76 [2020-07-21 22:15:44,429 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 645 DAG size of output: 260 [2020-07-21 22:15:45,521 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 422 DAG size of output: 125 [2020-07-21 22:15:48,635 WARN L193 SmtUtils]: Spent 3.11 s on a formula simplification. DAG size of input: 567 DAG size of output: 204 [2020-07-21 22:15:55,373 WARN L193 SmtUtils]: Spent 6.73 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:15:55,721 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 76 [2020-07-21 22:15:56,226 WARN L193 SmtUtils]: Spent 501.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 101 [2020-07-21 22:16:02,150 WARN L193 SmtUtils]: Spent 5.92 s on a formula simplification. DAG size of input: 689 DAG size of output: 272 [2020-07-21 22:16:08,704 WARN L193 SmtUtils]: Spent 6.55 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:16:09,626 WARN L193 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 398 DAG size of output: 122 [2020-07-21 22:16:09,780 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:16:10,658 WARN L193 SmtUtils]: Spent 874.00 ms on a formula simplification. DAG size of input: 387 DAG size of output: 119 [2020-07-21 22:16:10,813 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 22:16:11,303 WARN L193 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 22:16:11,802 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 22:16:12,298 WARN L193 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 341 DAG size of output: 101 [2020-07-21 22:16:18,888 WARN L193 SmtUtils]: Spent 6.59 s on a formula simplification. DAG size of input: 722 DAG size of output: 283 [2020-07-21 22:16:19,233 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 76 [2020-07-21 22:16:19,877 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 111 [2020-07-21 22:16:26,220 WARN L193 SmtUtils]: Spent 6.34 s on a formula simplification. DAG size of input: 701 DAG size of output: 282 [2020-07-21 22:16:32,054 WARN L193 SmtUtils]: Spent 5.83 s on a formula simplification. DAG size of input: 684 DAG size of output: 271