/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-simple/fibo_2calls_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 22:17:01,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 22:17:01,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 22:17:01,384 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 22:17:01,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 22:17:01,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 22:17:01,387 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 22:17:01,390 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 22:17:01,392 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 22:17:01,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 22:17:01,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 22:17:01,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 22:17:01,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 22:17:01,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 22:17:01,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 22:17:01,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 22:17:01,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 22:17:01,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 22:17:01,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 22:17:01,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 22:17:01,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 22:17:01,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 22:17:01,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 22:17:01,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 22:17:01,417 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 22:17:01,430 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 22:17:01,450 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 22:17:01,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 22:17:01,452 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 22:17:01,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 22:17:01,452 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 22:17:01,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 22:17:01,453 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 22:17:01,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 22:17:01,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 22:17:01,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 22:17:01,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 22:17:01,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 22:17:01,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 22:17:01,454 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 22:17:01,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 22:17:01,455 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 22:17:01,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 22:17:01,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 22:17:01,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 22:17:01,456 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 22:17:01,456 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 22:17:01,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 22:17:01,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 22:17:01,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 22:17:01,457 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 22:17:01,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 22:17:01,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:01,457 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 22:17:01,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 22:17:01,458 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 22:17:01,774 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 22:17:01,791 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 22:17:01,795 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 22:17:01,797 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 22:17:01,798 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 22:17:01,799 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c [2020-07-21 22:17:01,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe6219fb5/f467cf60b7254502b5a7164b2cac5fc6/FLAGc51e9187f [2020-07-21 22:17:02,459 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 22:17:02,460 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_15-2.c [2020-07-21 22:17:02,474 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe6219fb5/f467cf60b7254502b5a7164b2cac5fc6/FLAGc51e9187f [2020-07-21 22:17:02,791 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe6219fb5/f467cf60b7254502b5a7164b2cac5fc6 [2020-07-21 22:17:02,805 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 22:17:02,809 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 22:17:02,813 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 22:17:02,813 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 22:17:02,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 22:17:02,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:17:02" (1/1) ... [2020-07-21 22:17:02,823 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c8a2ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:02, skipping insertion in model container [2020-07-21 22:17:02,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 10:17:02" (1/1) ... [2020-07-21 22:17:02,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 22:17:02,854 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 22:17:03,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:17:03,042 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 22:17:03,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 22:17:03,084 INFO L208 MainTranslator]: Completed translation [2020-07-21 22:17:03,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:03 WrapperNode [2020-07-21 22:17:03,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 22:17:03,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 22:17:03,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 22:17:03,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 22:17:03,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:03" (1/1) ... [2020-07-21 22:17:03,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:03" (1/1) ... [2020-07-21 22:17:03,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:03" (1/1) ... [2020-07-21 22:17:03,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:03" (1/1) ... [2020-07-21 22:17:03,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:03" (1/1) ... [2020-07-21 22:17:03,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:03" (1/1) ... [2020-07-21 22:17:03,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:03" (1/1) ... [2020-07-21 22:17:03,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 22:17:03,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 22:17:03,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 22:17:03,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 22:17:03,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:03" (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 22:17:03,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 22:17:03,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 22:17:03,308 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 22:17:03,308 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 22:17:03,308 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 22:17:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 22:17:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 22:17:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 22:17:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 22:17:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 22:17:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 22:17:03,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 22:17:03,590 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 22:17:03,591 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 22:17:03,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:17:03 BoogieIcfgContainer [2020-07-21 22:17:03,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 22:17:03,605 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 22:17:03,605 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 22:17:03,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 22:17:03,618 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 10:17:02" (1/3) ... [2020-07-21 22:17:03,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1393a633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:17:03, skipping insertion in model container [2020-07-21 22:17:03,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 10:17:03" (2/3) ... [2020-07-21 22:17:03,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1393a633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 10:17:03, skipping insertion in model container [2020-07-21 22:17:03,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 10:17:03" (3/3) ... [2020-07-21 22:17:03,630 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_15-2.c [2020-07-21 22:17:03,656 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 22:17:03,665 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 22:17:03,683 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 22:17:03,711 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 22:17:03,712 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 22:17:03,712 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 22:17:03,712 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 22:17:03,713 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 22:17:03,713 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 22:17:03,713 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 22:17:03,713 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 22:17:03,738 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 22:17:03,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 22:17:03,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:03,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:03,749 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:03,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:03,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 22:17:03,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:03,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716078422] [2020-07-21 22:17:03,766 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 22:17:03,845 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:03,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:03,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:17:03,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:03,971 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 22:17:03,971 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:17:03,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716078422] [2020-07-21 22:17:03,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:17:03,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:17:03,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003288446] [2020-07-21 22:17:03,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:17:03,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:04,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:17:04,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:17:04,005 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 22:17:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:04,151 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 22:17:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:17:04,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 22:17:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:04,181 INFO L225 Difference]: With dead ends: 44 [2020-07-21 22:17:04,181 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 22:17:04,185 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 22:17:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 22:17:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 22:17:04,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:17:04,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:17:04,278 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 22:17:04,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:04,279 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:17:04,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:17:04,279 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:17:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 22:17:04,284 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:04,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:04,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:04,499 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:04,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:04,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 22:17:04,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:04,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255518784] [2020-07-21 22:17:04,501 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 22:17:04,537 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 22:17:04,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:04,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 22:17:04,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:04,589 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 22:17:04,590 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 22:17:04,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255518784] [2020-07-21 22:17:04,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 22:17:04,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 22:17:04,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142565312] [2020-07-21 22:17:04,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 22:17:04,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:04,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 22:17:04,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 22:17:04,595 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 22:17:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:04,674 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 22:17:04,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 22:17:04,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 22:17:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:04,678 INFO L225 Difference]: With dead ends: 36 [2020-07-21 22:17:04,678 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 22:17:04,680 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 22:17:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 22:17:04,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 22:17:04,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 22:17:04,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 22:17:04,691 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 22:17:04,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:04,692 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 22:17:04,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 22:17:04,693 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 22:17:04,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 22:17:04,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:04,695 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:04,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:04,911 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:04,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:04,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 22:17:04,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:04,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1749700715] [2020-07-21 22:17:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:17:04,943 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:04,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:04,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:17:04,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:17:05,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:05,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:17:05,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1749700715] [2020-07-21 22:17:05,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:05,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:17:05,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790680584] [2020-07-21 22:17:05,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:17:05,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:05,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:17:05,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:17:05,315 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 22:17:05,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:05,488 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 22:17:05,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:17:05,489 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 22:17:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:05,492 INFO L225 Difference]: With dead ends: 41 [2020-07-21 22:17:05,492 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 22:17:05,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:17:05,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 22:17:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 22:17:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:17:05,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:17:05,504 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 22:17:05,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:05,505 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:17:05,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:17:05,505 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:17:05,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 22:17:05,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:05,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:05,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:05,722 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:05,723 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 22:17:05,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:05,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838343946] [2020-07-21 22:17:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:05,754 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:05,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:05,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 22:17:05,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:17:05,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:05,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:05,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 22:17:06,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838343946] [2020-07-21 22:17:06,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:06,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 22:17:06,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169783327] [2020-07-21 22:17:06,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 22:17:06,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:06,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 22:17:06,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 22:17:06,030 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 22:17:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:06,184 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 22:17:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 22:17:06,185 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 22:17:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:06,188 INFO L225 Difference]: With dead ends: 46 [2020-07-21 22:17:06,188 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 22:17:06,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:17:06,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 22:17:06,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 22:17:06,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 22:17:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 22:17:06,201 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 22:17:06,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:06,201 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 22:17:06,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 22:17:06,201 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 22:17:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 22:17:06,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:06,204 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:06,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:06,419 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:06,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:06,420 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 22:17:06,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:06,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302659680] [2020-07-21 22:17:06,422 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:06,466 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:06,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:06,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:17:06,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:06,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 22:17:06,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:06,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:06,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:06,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:17:06,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302659680] [2020-07-21 22:17:06,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:06,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:17:06,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633342223] [2020-07-21 22:17:06,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:17:06,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:06,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:17:06,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:17:06,986 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 22:17:07,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:07,172 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 22:17:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:17:07,173 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 22:17:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:07,175 INFO L225 Difference]: With dead ends: 51 [2020-07-21 22:17:07,175 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 22:17:07,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:17:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 22:17:07,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 22:17:07,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:17:07,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:17:07,187 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 22:17:07,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:07,188 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:17:07,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:17:07,188 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:17:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 22:17:07,191 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:07,191 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:07,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:07,406 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:07,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:07,407 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 22:17:07,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:07,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846503232] [2020-07-21 22:17:07,409 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 22:17:07,440 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:07,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:07,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 22:17:07,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 22:17:07,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:07,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:07,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:07,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 22:17:07,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846503232] [2020-07-21 22:17:07,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:07,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 22:17:07,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357894205] [2020-07-21 22:17:07,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 22:17:07,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:07,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 22:17:07,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 22:17:07,849 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 22:17:08,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:08,040 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 22:17:08,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 22:17:08,043 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 22:17:08,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:08,046 INFO L225 Difference]: With dead ends: 56 [2020-07-21 22:17:08,046 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 22:17:08,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 22:17:08,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 22:17:08,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 22:17:08,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 22:17:08,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 22:17:08,083 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 22:17:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:08,084 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 22:17:08,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 22:17:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 22:17:08,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 22:17:08,092 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:08,093 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:08,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:08,294 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:08,296 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 22:17:08,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:08,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918891327] [2020-07-21 22:17:08,297 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 22:17:08,337 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:08,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:08,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:17:08,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 22:17:08,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:08,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:08,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:08,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:08,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:17:09,020 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918891327] [2020-07-21 22:17:09,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:09,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:17:09,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347242860] [2020-07-21 22:17:09,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:17:09,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:09,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:17:09,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:17:09,023 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 22:17:09,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:09,267 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 22:17:09,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:17:09,268 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 22:17:09,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:09,274 INFO L225 Difference]: With dead ends: 61 [2020-07-21 22:17:09,275 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 22:17:09,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:17:09,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 22:17:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 22:17:09,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:17:09,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:17:09,301 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 22:17:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:09,302 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:17:09,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:17:09,303 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:17:09,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 22:17:09,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:09,311 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:09,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:09,525 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:09,526 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 22:17:09,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:09,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649293136] [2020-07-21 22:17:09,526 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 22:17:09,575 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:09,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:09,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 22:17:09,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 22:17:09,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:10,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:10,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:10,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:10,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:10,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:10,225 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 22:17:10,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649293136] [2020-07-21 22:17:10,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:10,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 22:17:10,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249908417] [2020-07-21 22:17:10,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 22:17:10,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:10,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 22:17:10,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 22:17:10,230 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 22:17:10,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:10,457 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 22:17:10,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 22:17:10,457 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 22:17:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:10,460 INFO L225 Difference]: With dead ends: 66 [2020-07-21 22:17:10,460 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 22:17:10,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:17:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 22:17:10,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 22:17:10,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 22:17:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 22:17:10,474 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 22:17:10,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:10,475 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 22:17:10,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 22:17:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 22:17:10,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 22:17:10,477 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:10,477 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:10,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:10,690 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:10,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:10,690 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 22:17:10,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:10,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253447518] [2020-07-21 22:17:10,692 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 22:17:10,738 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 22:17:10,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:10,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:17:10,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 22:17:10,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:11,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:11,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:11,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:11,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:11,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:11,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:11,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 22:17:11,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253447518] [2020-07-21 22:17:11,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:11,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:17:11,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650278288] [2020-07-21 22:17:11,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:17:11,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:11,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:17:11,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:17:11,862 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 22:17:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:12,144 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 22:17:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:17:12,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 22:17:12,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:12,147 INFO L225 Difference]: With dead ends: 71 [2020-07-21 22:17:12,147 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 22:17:12,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:17:12,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 22:17:12,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 22:17:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:17:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:17:12,162 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 22:17:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:12,163 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:17:12,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:17:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:17:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 22:17:12,177 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:12,178 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:12,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:12,379 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:12,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:12,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 22:17:12,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:12,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249709626] [2020-07-21 22:17:12,380 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 22:17:12,428 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:12,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:12,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 22:17:12,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:12,508 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 22:17:12,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:13,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:13,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:13,369 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:13,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 22:17:13,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249709626] [2020-07-21 22:17:13,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:13,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 22:17:13,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929314620] [2020-07-21 22:17:13,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 22:17:13,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:13,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 22:17:13,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 22:17:13,501 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 22:17:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:13,742 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 22:17:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 22:17:13,743 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 22:17:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:13,745 INFO L225 Difference]: With dead ends: 76 [2020-07-21 22:17:13,746 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 22:17:13,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 22:17:13,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 22:17:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 22:17:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 22:17:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 22:17:13,761 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 22:17:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:13,762 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 22:17:13,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 22:17:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 22:17:13,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 22:17:13,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:13,765 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:13,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:13,980 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:13,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:13,980 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 22:17:13,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:13,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929771222] [2020-07-21 22:17:13,982 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 22:17:14,061 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:14,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:14,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:17:14,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 22:17:14,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:15,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:15,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 22:17:15,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929771222] [2020-07-21 22:17:15,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:15,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:17:15,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394451667] [2020-07-21 22:17:15,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:17:15,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:15,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:17:15,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:17:15,977 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 22:17:16,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:16,286 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 22:17:16,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:17:16,287 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 22:17:16,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:16,291 INFO L225 Difference]: With dead ends: 81 [2020-07-21 22:17:16,291 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 22:17:16,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:17:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 22:17:16,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 22:17:16,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:17:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:17:16,305 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 22:17:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:16,306 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:17:16,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:17:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:17:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 22:17:16,308 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:16,309 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:16,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:16,523 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:16,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:16,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 22:17:16,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:16,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888534108] [2020-07-21 22:17:16,525 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 22:17:16,590 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:16,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:16,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 22:17:16,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:16,682 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 22:17:16,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:17,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:17,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:17,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:17,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:18,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:18,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:18,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 22:17:18,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888534108] [2020-07-21 22:17:18,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:18,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 22:17:18,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472372586] [2020-07-21 22:17:18,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 22:17:18,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:18,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 22:17:18,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 22:17:18,185 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 22:17:18,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:18,548 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 22:17:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 22:17:18,549 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 22:17:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:18,552 INFO L225 Difference]: With dead ends: 86 [2020-07-21 22:17:18,552 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 22:17:18,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:17:18,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 22:17:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 22:17:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 22:17:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 22:17:18,595 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 22:17:18,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:18,596 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 22:17:18,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 22:17:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 22:17:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 22:17:18,602 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:18,603 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:18,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:18,815 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:18,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:18,816 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 22:17:18,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:18,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553861332] [2020-07-21 22:17:18,817 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 22:17:18,934 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:18,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:18,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:17:18,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 22:17:19,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:20,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:20,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:20,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,390 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:21,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 22:17:21,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553861332] [2020-07-21 22:17:21,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:21,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:17:21,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200595009] [2020-07-21 22:17:21,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:17:21,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:21,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:17:21,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:17:21,524 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 22:17:21,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:21,977 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 22:17:21,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:17:21,978 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 22:17:21,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:21,981 INFO L225 Difference]: With dead ends: 91 [2020-07-21 22:17:21,982 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 22:17:21,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:17:21,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 22:17:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 22:17:21,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:17:21,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:17:21,995 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 22:17:21,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:21,995 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:17:21,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:17:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:17:21,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 22:17:21,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:21,999 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:22,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:22,214 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:22,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:22,215 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 22:17:22,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:22,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179481988] [2020-07-21 22:17:22,216 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 22:17:22,326 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:22,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 22:17:22,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:22,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 22:17:22,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:23,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:24,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 22:17:25,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179481988] [2020-07-21 22:17:25,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:25,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 22:17:25,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009517919] [2020-07-21 22:17:25,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 22:17:25,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 22:17:25,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 22:17:25,086 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-21 22:17:25,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:25,493 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 22:17:25,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 22:17:25,494 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-21 22:17:25,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:25,501 INFO L225 Difference]: With dead ends: 96 [2020-07-21 22:17:25,501 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 22:17:25,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 22:17:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 22:17:25,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 22:17:25,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 22:17:25,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 22:17:25,526 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 22:17:25,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:25,527 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 22:17:25,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 22:17:25,527 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 22:17:25,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 22:17:25,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:25,538 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:25,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:25,752 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:25,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:25,753 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 22:17:25,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:25,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543143861] [2020-07-21 22:17:25,754 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 22:17:25,898 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:25,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:25,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:17:25,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 22:17:26,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:28,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:28,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:28,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:28,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:29,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:29,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:29,604 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:29,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:29,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:29,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:29,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 22:17:30,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543143861] [2020-07-21 22:17:30,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:30,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 22:17:30,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346444747] [2020-07-21 22:17:30,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:17:30,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:30,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:17:30,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:17:30,135 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-21 22:17:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:30,683 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 22:17:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:17:30,684 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-21 22:17:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:30,691 INFO L225 Difference]: With dead ends: 101 [2020-07-21 22:17:30,691 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 22:17:30,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:17:30,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 22:17:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 22:17:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:17:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 22:17:30,717 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 22:17:30,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:30,718 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 22:17:30,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:17:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 22:17:30,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 22:17:30,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:30,727 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:30,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:30,941 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:30,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:30,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-21 22:17:30,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:30,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395472960] [2020-07-21 22:17:30,943 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 22:17:31,104 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:31,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 22:17:31,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-21 22:17:31,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:33,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:33,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:34,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:34,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:35,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:35,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:35,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:35,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:35,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:35,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-21 22:17:35,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395472960] [2020-07-21 22:17:35,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:35,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 22:17:35,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479490405] [2020-07-21 22:17:35,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 22:17:35,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:35,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 22:17:35,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 22:17:35,563 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-21 22:17:36,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:36,071 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-21 22:17:36,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 22:17:36,072 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-21 22:17:36,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:36,076 INFO L225 Difference]: With dead ends: 106 [2020-07-21 22:17:36,076 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 22:17:36,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:17:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 22:17:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-21 22:17:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 22:17:36,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 22:17:36,101 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-21 22:17:36,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:36,103 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 22:17:36,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 22:17:36,104 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 22:17:36,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-21 22:17:36,136 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:36,136 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:36,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:36,353 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:36,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:36,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-21 22:17:36,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:36,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575073302] [2020-07-21 22:17:36,355 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 22:17:36,644 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:36,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:36,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:17:36,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-21 22:17:37,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:41,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:42,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:43,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:43,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:43,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:43,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:44,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:44,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:44,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:44,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:44,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:44,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-21 22:17:44,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575073302] [2020-07-21 22:17:44,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:44,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 22:17:44,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860840986] [2020-07-21 22:17:44,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:17:44,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:44,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:17:44,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:17:44,894 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-21 22:17:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:45,455 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-21 22:17:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:17:45,457 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-21 22:17:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:45,462 INFO L225 Difference]: With dead ends: 111 [2020-07-21 22:17:45,462 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 22:17:45,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:17:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 22:17:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-21 22:17:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:17:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 22:17:45,477 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-21 22:17:45,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:45,478 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 22:17:45,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:17:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 22:17:45,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-21 22:17:45,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:45,482 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:45,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:45,695 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:45,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:45,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-21 22:17:45,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:45,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367563957] [2020-07-21 22:17:45,697 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 22:17:45,940 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:45,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:45,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 22:17:45,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-21 22:17:46,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:48,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:49,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:49,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:50,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:51,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:51,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:51,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:51,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:51,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:51,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:51,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-21 22:17:51,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367563957] [2020-07-21 22:17:51,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:17:51,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 22:17:51,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437103695] [2020-07-21 22:17:51,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 22:17:51,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:17:51,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 22:17:51,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 22:17:51,838 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 24 states. [2020-07-21 22:17:52,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:17:52,436 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-21 22:17:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 22:17:52,437 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 418 [2020-07-21 22:17:52,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:17:52,441 INFO L225 Difference]: With dead ends: 116 [2020-07-21 22:17:52,441 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 22:17:52,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 22:17:52,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 22:17:52,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-21 22:17:52,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 22:17:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 22:17:52,460 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-21 22:17:52,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:17:52,460 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 22:17:52,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 22:17:52,461 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 22:17:52,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2020-07-21 22:17:52,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:17:52,467 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 46, 45, 45, 34, 34, 34, 34, 34, 34, 34, 34, 22, 22, 22, 22, 22, 22, 22, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:17:52,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:17:52,681 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:17:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:17:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1563866591, now seen corresponding path program 8 times [2020-07-21 22:17:52,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:17:52,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215401963] [2020-07-21 22:17:52,682 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 22:17:53,014 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:17:53,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:17:53,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:17:53,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:17:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2323 refuted. 0 times theorem prover too weak. 14314 trivial. 0 not checked. [2020-07-21 22:17:53,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:17:57,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:57,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:59,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:17:59,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:00,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:01,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:01,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:01,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:02,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:02,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:02,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:02,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:02,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:02,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:02,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2375 refuted. 0 times theorem prover too weak. 14262 trivial. 0 not checked. [2020-07-21 22:18:02,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215401963] [2020-07-21 22:18:02,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:02,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 22:18:02,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089076744] [2020-07-21 22:18:02,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 22:18:02,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:02,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 22:18:02,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:18:02,843 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 26 states. [2020-07-21 22:18:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:03,398 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-21 22:18:03,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:18:03,399 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 741 [2020-07-21 22:18:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:03,404 INFO L225 Difference]: With dead ends: 121 [2020-07-21 22:18:03,404 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 22:18:03,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1493 GetRequests, 1439 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 22:18:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 22:18:03,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-21 22:18:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 22:18:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 22:18:03,417 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 741 [2020-07-21 22:18:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:03,418 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 22:18:03,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 22:18:03,419 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 22:18:03,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 22:18:03,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:03,429 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 55, 55, 53, 37, 37, 37, 37, 37, 37, 37, 37, 27, 27, 27, 27, 27, 27, 27, 26, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:03,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:03,644 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:03,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:03,644 INFO L82 PathProgramCache]: Analyzing trace with hash 2100501163, now seen corresponding path program 4 times [2020-07-21 22:18:03,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:03,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087477292] [2020-07-21 22:18:03,645 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 22:18:04,010 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:04,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:04,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 22:18:04,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2821 refuted. 0 times theorem prover too weak. 19575 trivial. 0 not checked. [2020-07-21 22:18:04,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:06,188 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 22:18:09,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:09,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:10,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:11,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:11,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:12,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:13,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:14,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:14,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2877 refuted. 0 times theorem prover too weak. 19519 trivial. 0 not checked. [2020-07-21 22:18:14,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087477292] [2020-07-21 22:18:14,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:14,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 22:18:14,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779809868] [2020-07-21 22:18:14,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 22:18:14,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:14,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 22:18:14,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 22:18:14,458 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 26 states. [2020-07-21 22:18:15,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:15,160 INFO L93 Difference]: Finished difference Result 126 states and 350 transitions. [2020-07-21 22:18:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 22:18:15,161 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 871 [2020-07-21 22:18:15,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:15,166 INFO L225 Difference]: With dead ends: 126 [2020-07-21 22:18:15,166 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 22:18:15,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1752 GetRequests, 1698 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 22:18:15,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 22:18:15,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-21 22:18:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 22:18:15,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 22:18:15,181 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 871 [2020-07-21 22:18:15,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:15,182 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 22:18:15,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 22:18:15,182 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 22:18:15,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2020-07-21 22:18:15,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:15,214 INFO L422 BasicCegarLoop]: trace histogram [149, 149, 110, 110, 94, 74, 74, 74, 74, 74, 74, 74, 74, 55, 55, 55, 55, 55, 55, 55, 55, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:15,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:15,429 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:15,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:15,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1326645612, now seen corresponding path program 9 times [2020-07-21 22:18:15,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:15,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072328742] [2020-07-21 22:18:15,432 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 22:18:15,978 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:15,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:15,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 22:18:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6392 refuted. 0 times theorem prover too weak. 81780 trivial. 0 not checked. [2020-07-21 22:18:17,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:26,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:26,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:29,441 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:31,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:32,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:33,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:34,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:36,038 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6457 refuted. 0 times theorem prover too weak. 81715 trivial. 0 not checked. [2020-07-21 22:18:36,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072328742] [2020-07-21 22:18:36,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:36,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-21 22:18:36,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708861547] [2020-07-21 22:18:36,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 22:18:36,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:36,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 22:18:36,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:18:36,042 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 28 states. [2020-07-21 22:18:36,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:36,902 INFO L93 Difference]: Finished difference Result 131 states and 376 transitions. [2020-07-21 22:18:36,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 22:18:36,903 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1690 [2020-07-21 22:18:36,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:36,909 INFO L225 Difference]: With dead ends: 131 [2020-07-21 22:18:36,909 INFO L226 Difference]: Without dead ends: 127 [2020-07-21 22:18:36,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3392 GetRequests, 3333 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 22:18:36,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-21 22:18:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2020-07-21 22:18:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 22:18:36,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-21 22:18:36,929 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1690 [2020-07-21 22:18:36,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:36,931 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-21 22:18:36,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 22:18:36,931 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-21 22:18:36,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1433 [2020-07-21 22:18:36,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:36,966 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 92, 92, 87, 60, 60, 60, 60, 60, 60, 60, 60, 46, 46, 46, 46, 46, 46, 46, 41, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:37,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:37,180 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash -37703149, now seen corresponding path program 5 times [2020-07-21 22:18:37,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:37,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971885889] [2020-07-21 22:18:37,182 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 22:18:37,767 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:37,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:37,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 22:18:37,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:18:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5319 refuted. 0 times theorem prover too weak. 56349 trivial. 0 not checked. [2020-07-21 22:18:39,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:18:46,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:46,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:49,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:49,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:51,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:51,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:52,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:54,817 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:55,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:55,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:55,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:55,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:55,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:18:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5389 refuted. 0 times theorem prover too weak. 56279 trivial. 0 not checked. [2020-07-21 22:18:56,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971885889] [2020-07-21 22:18:56,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:18:56,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-21 22:18:56,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837330216] [2020-07-21 22:18:56,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 22:18:56,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:18:56,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 22:18:56,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-21 22:18:56,540 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 28 states. [2020-07-21 22:18:57,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:18:57,323 INFO L93 Difference]: Finished difference Result 136 states and 404 transitions. [2020-07-21 22:18:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 22:18:57,327 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1432 [2020-07-21 22:18:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:18:57,332 INFO L225 Difference]: With dead ends: 136 [2020-07-21 22:18:57,333 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 22:18:57,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2875 GetRequests, 2816 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 22:18:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 22:18:57,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-07-21 22:18:57,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 22:18:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-21 22:18:57,349 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1432 [2020-07-21 22:18:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:18:57,350 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-21 22:18:57,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 22:18:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-21 22:18:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1990 [2020-07-21 22:18:57,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:18:57,395 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 112, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 64, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:18:57,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:18:57,610 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:18:57,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:18:57,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1412849447, now seen corresponding path program 10 times [2020-07-21 22:18:57,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:18:57,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900644056] [2020-07-21 22:18:57,612 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 22:18:58,346 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:18:58,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:18:58,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:18:58,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8137 refuted. 0 times theorem prover too weak. 114500 trivial. 0 not checked. [2020-07-21 22:19:00,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:11,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:11,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:14,702 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:19:15,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:18,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:18,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:21,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:22,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:23,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:23,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:24,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:24,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:24,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:24,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:25,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:25,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:25,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8217 refuted. 0 times theorem prover too weak. 114420 trivial. 0 not checked. [2020-07-21 22:19:27,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900644056] [2020-07-21 22:19:27,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:19:27,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-21 22:19:27,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443774664] [2020-07-21 22:19:27,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 22:19:27,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:19:27,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 22:19:27,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:19:27,229 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 30 states. [2020-07-21 22:19:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:19:28,435 INFO L93 Difference]: Finished difference Result 141 states and 432 transitions. [2020-07-21 22:19:28,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 22:19:28,436 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1989 [2020-07-21 22:19:28,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:19:28,442 INFO L225 Difference]: With dead ends: 141 [2020-07-21 22:19:28,442 INFO L226 Difference]: Without dead ends: 137 [2020-07-21 22:19:28,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3991 GetRequests, 3927 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 22:19:28,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-21 22:19:28,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-07-21 22:19:28,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 22:19:28,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-21 22:19:28,460 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 1989 [2020-07-21 22:19:28,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:19:28,462 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-21 22:19:28,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 22:19:28,462 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-21 22:19:28,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2050 [2020-07-21 22:19:28,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:19:28,494 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 124, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 60, 52, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:19:28,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:19:28,697 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:19:28,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:19:28,699 INFO L82 PathProgramCache]: Analyzing trace with hash 266934567, now seen corresponding path program 5 times [2020-07-21 22:19:28,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:19:28,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304083111] [2020-07-21 22:19:28,700 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 22:19:29,598 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:19:29,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:19:29,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 1138 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 22:19:29,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:19:31,816 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8506 refuted. 0 times theorem prover too weak. 119697 trivial. 0 not checked. [2020-07-21 22:19:31,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:19:42,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:42,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:47,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:52,029 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:19:52,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:52,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:54,644 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:56,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:56,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:57,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:58,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:59,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:59,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:59,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:19:59,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:00,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:01,726 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8591 refuted. 0 times theorem prover too weak. 119612 trivial. 0 not checked. [2020-07-21 22:20:01,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304083111] [2020-07-21 22:20:01,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:20:01,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-21 22:20:01,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781639874] [2020-07-21 22:20:01,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 22:20:01,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:20:01,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 22:20:01,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-21 22:20:01,730 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 30 states. [2020-07-21 22:20:03,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:20:03,648 INFO L93 Difference]: Finished difference Result 146 states and 462 transitions. [2020-07-21 22:20:03,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 22:20:03,650 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 2049 [2020-07-21 22:20:03,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:20:03,654 INFO L225 Difference]: With dead ends: 146 [2020-07-21 22:20:03,654 INFO L226 Difference]: Without dead ends: 142 [2020-07-21 22:20:03,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4110 GetRequests, 4046 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 22:20:03,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-21 22:20:03,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2020-07-21 22:20:03,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 22:20:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-21 22:20:03,676 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 2049 [2020-07-21 22:20:03,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:20:03,677 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-21 22:20:03,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 22:20:03,678 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-21 22:20:03,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3680 [2020-07-21 22:20:03,780 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:20:03,782 INFO L422 BasicCegarLoop]: trace histogram [329, 329, 236, 236, 211, 164, 164, 164, 164, 164, 164, 164, 164, 118, 118, 118, 118, 118, 118, 118, 118, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:20:03,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:20:03,997 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:20:03,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:20:03,998 INFO L82 PathProgramCache]: Analyzing trace with hash -886096047, now seen corresponding path program 11 times [2020-07-21 22:20:03,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:20:03,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161236899] [2020-07-21 22:20:03,999 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 22:20:05,080 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:20:05,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:20:05,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 2049 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 22:20:05,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:20:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16770 refuted. 0 times theorem prover too weak. 408925 trivial. 0 not checked. [2020-07-21 22:20:09,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:20:14,225 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:20:15,251 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:20:15,358 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:20:15,466 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:20:15,575 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:20:17,655 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:20:17,772 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:20:17,898 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:20:18,020 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:20:18,140 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:20:18,249 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:20:18,351 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:20:37,854 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:20:38,957 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:20:39,062 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:20:39,174 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:20:39,287 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:20:39,409 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:20:39,518 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:20:40,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:50,775 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:20:51,719 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:20:51,827 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:20:51,934 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:20:52,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:20:55,477 WARN L193 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 22:21:01,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:01,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:11,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,583 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:16,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:19,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:21,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:21,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:22,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:22,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:23,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:23,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:23,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:21:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16866 refuted. 0 times theorem prover too weak. 408829 trivial. 0 not checked. [2020-07-21 22:21:28,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161236899] [2020-07-21 22:21:28,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:21:28,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-21 22:21:28,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161577363] [2020-07-21 22:21:28,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 22:21:28,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:21:28,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 22:21:28,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:21:28,063 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 32 states. [2020-07-21 22:21:30,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:21:30,362 INFO L93 Difference]: Finished difference Result 151 states and 492 transitions. [2020-07-21 22:21:30,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:21:30,366 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3679 [2020-07-21 22:21:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:21:30,373 INFO L225 Difference]: With dead ends: 151 [2020-07-21 22:21:30,373 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 22:21:30,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7372 GetRequests, 7303 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 22:21:30,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 22:21:30,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2020-07-21 22:21:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 22:21:30,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-21 22:21:30,397 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3679 [2020-07-21 22:21:30,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:21:30,401 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-21 22:21:30,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 22:21:30,401 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-21 22:21:30,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3365 [2020-07-21 22:21:30,517 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:21:30,519 INFO L422 BasicCegarLoop]: trace histogram [287, 287, 214, 214, 208, 143, 143, 143, 143, 143, 143, 143, 143, 107, 107, 107, 107, 107, 107, 107, 101, 79, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:21:30,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:21:30,734 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:21:30,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:21:30,735 INFO L82 PathProgramCache]: Analyzing trace with hash 147049693, now seen corresponding path program 6 times [2020-07-21 22:21:30,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:21:30,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957224464] [2020-07-21 22:21:30,736 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 22:21:31,992 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:21:31,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:21:31,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 1867 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 22:21:32,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:21:36,021 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15526 refuted. 0 times theorem prover too weak. 332578 trivial. 0 not checked. [2020-07-21 22:21:36,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:21:39,359 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:21:39,470 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:21:39,583 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:21:39,698 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:21:41,337 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:21:41,449 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:21:41,571 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:21:41,692 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:21:42,996 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:21:43,115 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:21:43,233 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:21:43,353 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:21:44,941 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:21:45,093 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:21:45,242 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:21:45,387 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:21:45,527 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:21:45,651 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:21:45,772 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:21:45,897 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:21:46,014 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:21:46,128 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:21:46,231 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:22:00,306 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:00,513 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:22:01,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:01,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:11,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:22,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:22,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:27,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:27,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:31,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:33,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:34,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:35,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:36,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:36,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:36,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:37,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:22:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15628 refuted. 0 times theorem prover too weak. 332476 trivial. 0 not checked. [2020-07-21 22:22:41,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957224464] [2020-07-21 22:22:41,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:22:41,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-21 22:22:41,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262949785] [2020-07-21 22:22:41,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 22:22:41,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:22:41,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 22:22:41,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-21 22:22:41,151 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 32 states. [2020-07-21 22:22:42,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:22:42,934 INFO L93 Difference]: Finished difference Result 156 states and 524 transitions. [2020-07-21 22:22:42,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 22:22:42,937 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3364 [2020-07-21 22:22:42,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:22:42,944 INFO L225 Difference]: With dead ends: 156 [2020-07-21 22:22:42,944 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 22:22:42,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6741 GetRequests, 6672 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 22:22:42,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 22:22:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-21 22:22:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 22:22:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-21 22:22:42,964 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3364 [2020-07-21 22:22:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:22:42,966 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-21 22:22:42,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 22:22:42,967 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-21 22:22:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4616 [2020-07-21 22:22:43,095 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:22:43,096 INFO L422 BasicCegarLoop]: trace histogram [436, 436, 300, 273, 273, 218, 218, 218, 218, 218, 218, 218, 218, 136, 136, 136, 136, 136, 136, 136, 136, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:22:43,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:22:43,298 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:22:43,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:22:43,300 INFO L82 PathProgramCache]: Analyzing trace with hash -554675479, now seen corresponding path program 12 times [2020-07-21 22:22:43,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:22:43,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685714813] [2020-07-21 22:22:43,301 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 22:22:44,664 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:22:44,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:22:44,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 2571 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 22:22:44,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:22:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 22920 refuted. 0 times theorem prover too weak. 665925 trivial. 0 not checked. [2020-07-21 22:22:52,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:22:55,991 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:22:56,096 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:22:56,201 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:22:58,019 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:22:58,128 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:22:58,250 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:58,372 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:22:59,717 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:22:59,851 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:22:59,987 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:23:00,119 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:23:02,456 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:23:02,606 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:23:02,766 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:23:02,918 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:23:03,093 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 22:23:03,238 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 22:23:03,371 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:23:03,498 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:23:03,620 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:23:03,746 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:23:03,857 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:23:03,958 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:23:25,277 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:23:25,394 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:23:25,519 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:25,646 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:28,234 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:23:28,372 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:23:28,516 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:28,661 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:30,521 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:23:30,685 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:23:30,859 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:23:31,036 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:23:31,201 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 22:23:31,351 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:23:31,491 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 22:23:31,628 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:23:31,757 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:23:31,879 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:23:31,995 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 22:23:32,100 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 22:23:32,204 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:23:32,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:23:47,748 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:23:47,865 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:23:47,989 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:23:48,112 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:23:49,194 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:23:49,324 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:23:49,465 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:49,605 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:23:52,399 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:23:52,548 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:23:52,706 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:52,864 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:53,020 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:23:53,164 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:23:53,300 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:23:53,435 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:23:53,560 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 22:23:53,681 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:23:53,792 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:23:54,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:20,296 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:24:20,402 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:24:21,105 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:24:21,233 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:24:21,366 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:21,507 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:22,782 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:24:22,935 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:24:23,098 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:24:23,263 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:24:23,421 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:24:23,567 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:24:23,702 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:24:23,822 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:24:23,938 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:24:24,050 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:24:24,162 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:24:24,265 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:24,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:33,924 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:34,040 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:34,165 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:34,277 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:34,826 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:24:34,948 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:24:35,088 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:24:35,224 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:24:36,069 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:24:36,216 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:24:36,366 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:36,522 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:36,674 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:24:36,817 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:24:36,954 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 22:24:37,083 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:24:37,203 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:24:37,314 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:37,417 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:24:37,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:43,158 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:43,264 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:43,919 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:44,033 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:44,153 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:44,275 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:44,846 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:24:44,980 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:24:45,116 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:24:45,256 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:24:45,385 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:24:45,510 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:24:45,630 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:24:45,741 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 22:24:46,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:49,838 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:50,479 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:50,601 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:24:50,732 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:50,864 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:24:50,989 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:24:51,101 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:24:51,208 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 22:24:51,644 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:24:51,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:51,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:24:56,046 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:24:56,707 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:56,814 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:24:57,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:00,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:02,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:03,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:04,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:05,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:05,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:05,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:25:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 23034 refuted. 0 times theorem prover too weak. 665811 trivial. 0 not checked. [2020-07-21 22:25:13,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685714813] [2020-07-21 22:25:13,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 22:25:13,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-21 22:25:13,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170119911] [2020-07-21 22:25:13,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 22:25:13,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 22:25:13,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 22:25:13,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 22:25:13,196 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 34 states. [2020-07-21 22:25:16,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 22:25:16,397 INFO L93 Difference]: Finished difference Result 161 states and 556 transitions. [2020-07-21 22:25:16,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 22:25:16,402 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 4615 [2020-07-21 22:25:16,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 22:25:16,409 INFO L225 Difference]: With dead ends: 161 [2020-07-21 22:25:16,410 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 22:25:16,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9245 GetRequests, 9171 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 22:25:16,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 22:25:16,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-07-21 22:25:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 22:25:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-21 22:25:16,433 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 4615 [2020-07-21 22:25:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 22:25:16,436 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-21 22:25:16,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 22:25:16,437 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-21 22:25:17,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9330 [2020-07-21 22:25:17,319 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 22:25:17,322 INFO L422 BasicCegarLoop]: trace histogram [846, 846, 625, 533, 533, 423, 423, 423, 423, 423, 423, 423, 423, 359, 266, 266, 266, 266, 266, 266, 266, 221, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 22:25:17,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 22:25:17,531 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 22:25:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 22:25:17,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1670319822, now seen corresponding path program 6 times [2020-07-21 22:25:17,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 22:25:17,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015886474] [2020-07-21 22:25:17,535 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 22:25:19,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-21 22:25:19,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 22:25:19,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 5179 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 22:25:19,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 22:25:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49554 refuted. 0 times theorem prover too weak. 2725114 trivial. 0 not checked. [2020-07-21 22:25:49,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 22:25:52,644 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:25:52,756 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:25:52,874 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:25:52,993 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:25:53,756 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:25:53,885 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:25:54,021 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:25:54,155 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:25:55,411 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:25:55,551 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:25:55,690 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:25:55,835 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:25:57,924 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:25:58,067 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:25:58,219 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:25:58,381 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:04,973 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:26:05,155 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:26:05,345 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:26:05,527 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:26:15,171 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:26:15,344 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:26:15,525 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:26:15,700 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 22:26:15,877 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 22:26:16,044 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 22:26:16,206 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 22:26:16,359 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 22:26:16,510 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 22:26:16,647 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 22:26:16,768 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 22:26:16,890 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 22:26:17,009 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:26:17,124 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:26:17,232 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:26:17,337 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:27:56,797 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:27:57,009 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:27:57,115 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:27:57,937 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:27:58,058 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:27:58,184 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:58,306 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:27:58,898 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:59,111 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:27:59,254 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:27:59,397 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:28:00,213 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:28:00,359 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:28:00,512 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:28:00,663 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:28:02,224 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:28:02,381 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:28:02,564 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:28:02,739 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:28:05,880 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:28:06,064 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:28:06,248 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:28:06,425 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:28:13,990 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:28:14,169 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 22:28:14,362 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:28:14,548 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 22:28:14,734 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 22:28:14,921 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 22:28:15,109 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:28:15,281 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:28:15,439 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:28:15,589 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:28:15,732 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:28:15,869 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:28:16,006 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:28:16,137 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 22:28:16,256 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:28:16,373 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 22:28:16,490 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2020-07-21 22:28:16,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:28:16,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:19,257 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:29:19,464 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:29:19,937 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:29:20,044 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:29:20,162 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:29:21,029 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:29:21,168 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:29:21,290 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:29:21,436 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:29:22,138 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:29:22,279 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:29:22,426 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:29:22,572 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:29:23,472 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:29:23,635 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:29:23,792 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:29:23,974 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:29:25,557 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:29:25,721 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:29:25,892 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:29:26,073 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:29:29,652 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:29:29,855 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:29:30,065 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:29:30,276 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:29:30,489 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 22:29:30,678 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 22:29:30,870 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:29:31,047 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:29:31,224 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:29:31,390 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 22:29:31,533 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 22:29:31,669 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:29:31,799 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 22:29:31,926 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 22:29:32,037 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:29:32,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:29:59,350 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:29:59,466 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 22:29:59,578 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:29:59,690 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 22:30:00,102 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:30:00,235 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 22:30:00,364 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:30:00,485 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 22:30:01,485 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:30:01,617 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:30:01,762 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:30:01,928 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:30:02,624 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:30:02,771 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:30:02,947 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:30:03,130 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:30:03,992 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:30:04,115 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:30:04,244 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:30:04,366 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:30:05,677 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:30:05,821 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 22:30:05,976 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:30:06,131 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 22:30:06,288 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 22:30:06,439 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 22:30:06,573 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 22:30:06,703 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:30:06,828 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-21 22:30:06,944 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:30:07,052 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:30:07,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:17,505 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:30:17,611 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:30:18,095 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:30:18,216 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:30:18,333 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:30:18,451 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:30:19,150 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:30:19,279 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 22:30:19,426 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:30:19,577 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:30:19,714 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 22:30:19,850 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 22:30:19,966 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:30:20,073 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:30:20,183 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 22:30:20,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:20,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:26,524 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:30:26,631 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:30:26,740 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:30:27,257 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:30:27,375 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 22:30:27,497 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:30:27,621 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 22:30:27,746 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 22:30:27,857 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 22:30:27,962 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-07-21 22:30:28,065 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:30:28,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 22:30:32,850 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:30:33,044 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 22:30:33,153 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:30:33,263 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 22:30:33,472 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 22:30:33,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts