/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --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/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 16:30:45,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 16:30:45,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 16:30:45,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 16:30:45,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 16:30:45,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 16:30:45,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 16:30:45,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 16:30:45,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 16:30:45,051 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 16:30:45,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 16:30:45,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 16:30:45,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 16:30:45,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 16:30:45,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 16:30:45,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 16:30:45,065 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 16:30:45,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 16:30:45,069 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 16:30:45,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 16:30:45,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 16:30:45,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 16:30:45,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 16:30:45,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 16:30:45,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 16:30:45,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 16:30:45,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 16:30:45,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 16:30:45,105 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 16:30:45,129 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 16:30:45,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 16:30:45,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 16:30:45,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 16:30:45,132 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 16:30:45,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 16:30:45,132 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 16:30:45,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 16:30:45,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 16:30:45,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 16:30:45,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 16:30:45,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 16:30:45,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 16:30:45,135 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 16:30:45,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 16:30:45,135 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 16:30:45,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 16:30:45,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 16:30:45,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 16:30:45,136 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 16:30:45,136 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 16:30:45,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:30:45,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 16:30:45,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 16:30:45,137 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 16:30:45,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 16:30:45,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:45,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 16:30:45,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 16:30:45,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 16:30:45,454 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 16:30:45,470 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 16:30:45,474 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 16:30:45,475 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 16:30:45,478 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 16:30:45,479 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-20 16:30:45,554 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952f87bb4/7fc3f0c8b269487da2b2b5a052a0585c/FLAG5a30786ac [2020-07-20 16:30:45,997 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 16:30:45,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-20 16:30:46,006 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952f87bb4/7fc3f0c8b269487da2b2b5a052a0585c/FLAG5a30786ac [2020-07-20 16:30:46,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/952f87bb4/7fc3f0c8b269487da2b2b5a052a0585c [2020-07-20 16:30:46,365 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 16:30:46,368 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 16:30:46,369 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 16:30:46,369 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 16:30:46,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 16:30:46,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:30:46" (1/1) ... [2020-07-20 16:30:46,378 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0b6dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:46, skipping insertion in model container [2020-07-20 16:30:46,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 04:30:46" (1/1) ... [2020-07-20 16:30:46,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 16:30:46,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 16:30:46,581 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:30:46,586 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 16:30:46,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 16:30:46,620 INFO L208 MainTranslator]: Completed translation [2020-07-20 16:30:46,621 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:46 WrapperNode [2020-07-20 16:30:46,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 16:30:46,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 16:30:46,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 16:30:46,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 16:30:46,636 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:46" (1/1) ... [2020-07-20 16:30:46,636 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:46" (1/1) ... [2020-07-20 16:30:46,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:46" (1/1) ... [2020-07-20 16:30:46,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:46" (1/1) ... [2020-07-20 16:30:46,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:46" (1/1) ... [2020-07-20 16:30:46,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:46" (1/1) ... [2020-07-20 16:30:46,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:46" (1/1) ... [2020-07-20 16:30:46,651 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 16:30:46,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 16:30:46,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 16:30:46,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 16:30:46,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 16:30:46,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 16:30:46,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 16:30:46,799 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-07-20 16:30:46,799 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 16:30:46,799 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 16:30:46,800 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 16:30:46,800 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-07-20 16:30:46,800 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 16:30:46,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 16:30:46,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 16:30:47,004 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 16:30:47,004 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 16:30:47,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:30:47 BoogieIcfgContainer [2020-07-20 16:30:47,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 16:30:47,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 16:30:47,011 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 16:30:47,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 16:30:47,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 04:30:46" (1/3) ... [2020-07-20 16:30:47,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651f8d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:30:47, skipping insertion in model container [2020-07-20 16:30:47,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 04:30:46" (2/3) ... [2020-07-20 16:30:47,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@651f8d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 04:30:47, skipping insertion in model container [2020-07-20 16:30:47,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 04:30:47" (3/3) ... [2020-07-20 16:30:47,018 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-07-20 16:30:47,029 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 16:30:47,037 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 16:30:47,055 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 16:30:47,088 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 16:30:47,088 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 16:30:47,088 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 16:30:47,089 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 16:30:47,089 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 16:30:47,089 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 16:30:47,089 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 16:30:47,089 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 16:30:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 16:30:47,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-20 16:30:47,125 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:47,128 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:47,129 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:47,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:47,144 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-07-20 16:30:47,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:47,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157288396] [2020-07-20 16:30:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:47,252 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:30:47,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:47,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:30:47,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 16:30:47,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 16:30:47,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157288396] [2020-07-20 16:30:47,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:47,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-20 16:30:47,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627869975] [2020-07-20 16:30:47,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 16:30:47,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:47,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 16:30:47,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:30:47,495 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-20 16:30:47,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:47,646 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-07-20 16:30:47,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:30:47,648 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-20 16:30:47,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:47,660 INFO L225 Difference]: With dead ends: 41 [2020-07-20 16:30:47,660 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 16:30:47,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-20 16:30:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 16:30:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 16:30:47,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 16:30:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-20 16:30:47,716 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-07-20 16:30:47,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:47,716 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-20 16:30:47,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 16:30:47,717 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-20 16:30:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 16:30:47,720 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:47,720 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:47,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:47,934 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:47,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-07-20 16:30:47,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:47,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669160035] [2020-07-20 16:30:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:47,989 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:30:47,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:47,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:30:47,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 16:30:48,022 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:30:48,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669160035] [2020-07-20 16:30:48,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:30:48,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:30:48,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160694895] [2020-07-20 16:30:48,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:30:48,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:48,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:30:48,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:30:48,026 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-07-20 16:30:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:48,104 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-20 16:30:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:30:48,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-20 16:30:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:48,107 INFO L225 Difference]: With dead ends: 29 [2020-07-20 16:30:48,107 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 16:30:48,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 16:30:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 16:30:48,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 16:30:48,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 16:30:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-07-20 16:30:48,117 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-07-20 16:30:48,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:48,118 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-07-20 16:30:48,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:30:48,118 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-07-20 16:30:48,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 16:30:48,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:48,120 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:48,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:48,336 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-07-20 16:30:48,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:48,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845573414] [2020-07-20 16:30:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:48,389 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:30:48,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:48,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 16:30:48,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:48,559 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 16:30:48,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:48,750 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 16:30:48,754 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 16:30:48,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:48,910 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:48,913 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:48,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:48,916 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:48,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:48,919 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:48,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:49,258 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 16:30:49,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:49,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:49,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:49,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:49,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:49,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:49,272 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 16:30:49,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:49,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:49,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:49,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:49,281 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 16:30:49,308 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 16:30:49,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845573414] [2020-07-20 16:30:49,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:49,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 22 [2020-07-20 16:30:49,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439351454] [2020-07-20 16:30:49,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 16:30:49,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:49,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 16:30:49,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-07-20 16:30:49,312 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 22 states. [2020-07-20 16:30:49,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:49,688 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-20 16:30:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:30:49,688 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-07-20 16:30:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:49,690 INFO L225 Difference]: With dead ends: 40 [2020-07-20 16:30:49,691 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 16:30:49,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2020-07-20 16:30:49,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 16:30:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-07-20 16:30:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-20 16:30:49,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-07-20 16:30:49,704 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-07-20 16:30:49,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:49,704 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-07-20 16:30:49,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 16:30:49,705 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-07-20 16:30:49,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 16:30:49,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:49,707 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:49,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:49,918 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:49,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:49,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-07-20 16:30:49,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:49,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942125812] [2020-07-20 16:30:49,921 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:49,982 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:30:49,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:49,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 47 conjunts are in the unsatisfiable core [2020-07-20 16:30:49,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-07-20 16:30:50,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:50,414 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 16:30:50,415 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:50,607 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:50,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:50,615 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:50,617 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:50,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:50,619 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:50,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:50,623 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:50,683 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:50,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:50,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:51,024 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 16:30:51,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:51,027 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 16:30:51,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:51,028 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:51,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:51,031 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 16:30:51,032 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-20 16:30:51,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:51,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:51,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:51,037 INFO L501 QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts [2020-07-20 16:30:51,038 INFO L501 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2020-07-20 16:30:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 27 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 16:30:51,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942125812] [2020-07-20 16:30:51,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:51,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 26 [2020-07-20 16:30:51,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779464718] [2020-07-20 16:30:51,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 16:30:51,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:51,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 16:30:51,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2020-07-20 16:30:51,064 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 26 states. [2020-07-20 16:30:51,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:30:51,642 INFO L93 Difference]: Finished difference Result 48 states and 64 transitions. [2020-07-20 16:30:51,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 16:30:51,642 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 43 [2020-07-20 16:30:51,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:30:51,644 INFO L225 Difference]: With dead ends: 48 [2020-07-20 16:30:51,645 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 16:30:51,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 16:30:51,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 16:30:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2020-07-20 16:30:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 16:30:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2020-07-20 16:30:51,659 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2020-07-20 16:30:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:30:51,660 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2020-07-20 16:30:51,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 16:30:51,660 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2020-07-20 16:30:51,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-20 16:30:51,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:30:51,662 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:30:51,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:51,878 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:30:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:30:51,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-07-20 16:30:51,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:30:51,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493248860] [2020-07-20 16:30:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:30:51,917 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:30:51,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:30:51,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-20 16:30:51,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:30:52,135 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 16:30:52,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:30:52,338 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:52,535 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:52,536 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:52,656 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:52,657 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:52,658 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:52,659 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:30:53,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:53,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:53,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:53,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:53,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:53,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:53,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:53,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:53,031 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:30:53,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:30:55,070 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and .cse0 (or .cse0 (forall ((v_mult_~n_BEFORE_CALL_14 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_14 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3))) (forall ((v_mult_~n_BEFORE_CALL_14 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_14 (- 1)))) (or (< (div .cse1 (- 2)) 1) (< (div (+ .cse1 (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3) (<= 3 (div (+ .cse1 (- 1)) (- 2)))))) (forall ((v_mult_~n_BEFORE_CALL_14 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_14 (- 1)))) (let ((.cse2 (div .cse3 (- 2)))) (or (< .cse2 1) (<= 3 (div (+ .cse3 (- 1)) (- 2))) (< .cse2 (+ (div (+ .cse3 (* |c_mult_#res| (- 1))) (- 2)) 1)))))))) is different from false [2020-07-20 16:30:57,123 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (< |c_mult_#in~m| 1))) (and (forall ((v_prenex_2 Int)) (let ((.cse1 (* v_prenex_2 (- 1)))) (let ((.cse0 (div .cse1 (- 2)))) (or (< .cse0 (+ (div (+ .cse1 (* |c_mult_#res| (- 1))) (- 2)) 1)) (< .cse0 1) (<= 3 (div (+ .cse1 (- 1)) (- 2))))))) .cse2 (or .cse2 (forall ((v_mult_~n_BEFORE_CALL_14 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_14 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3))) (forall ((v_prenex_1 Int)) (let ((.cse3 (* v_prenex_1 (- 1)))) (or (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3) (< (div .cse3 (- 2)) 1) (<= 3 (div (+ .cse3 (- 1)) (- 2)))))))) is different from false [2020-07-20 16:30:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2020-07-20 16:30:57,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493248860] [2020-07-20 16:30:57,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:30:57,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2020-07-20 16:30:57,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843973865] [2020-07-20 16:30:57,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-20 16:30:57,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:30:57,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-20 16:30:57,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=948, Unknown=2, NotChecked=126, Total=1190 [2020-07-20 16:30:57,224 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 35 states. [2020-07-20 16:31:38,122 WARN L193 SmtUtils]: Spent 40.61 s on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-07-20 16:31:43,489 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-07-20 16:31:44,420 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-20 16:31:45,042 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 16:31:45,583 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:31:48,740 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 16:31:49,201 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-20 16:31:50,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:31:50,483 INFO L93 Difference]: Finished difference Result 76 states and 102 transitions. [2020-07-20 16:31:50,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 16:31:50,483 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 44 [2020-07-20 16:31:50,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:31:50,486 INFO L225 Difference]: With dead ends: 76 [2020-07-20 16:31:50,486 INFO L226 Difference]: Without dead ends: 64 [2020-07-20 16:31:50,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=248, Invalid=1920, Unknown=2, NotChecked=182, Total=2352 [2020-07-20 16:31:50,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-20 16:31:50,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2020-07-20 16:31:50,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 16:31:50,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 79 transitions. [2020-07-20 16:31:50,508 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 79 transitions. Word has length 44 [2020-07-20 16:31:50,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:31:50,509 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 79 transitions. [2020-07-20 16:31:50,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-20 16:31:50,509 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 79 transitions. [2020-07-20 16:31:50,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 16:31:50,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:31:50,512 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:31:50,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:31:50,727 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:31:50,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:31:50,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1974048365, now seen corresponding path program 2 times [2020-07-20 16:31:50,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:31:50,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133558958] [2020-07-20 16:31:50,729 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:31:50,788 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:31:50,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:31:50,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 16:31:50,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:31:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-07-20 16:31:50,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:31:51,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:51,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-07-20 16:31:51,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133558958] [2020-07-20 16:31:51,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:31:51,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-20 16:31:51,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685762297] [2020-07-20 16:31:51,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 16:31:51,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:31:51,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 16:31:51,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-20 16:31:51,674 INFO L87 Difference]: Start difference. First operand 52 states and 79 transitions. Second operand 8 states. [2020-07-20 16:31:52,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:31:52,105 INFO L93 Difference]: Finished difference Result 64 states and 101 transitions. [2020-07-20 16:31:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 16:31:52,114 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-07-20 16:31:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:31:52,117 INFO L225 Difference]: With dead ends: 64 [2020-07-20 16:31:52,117 INFO L226 Difference]: Without dead ends: 56 [2020-07-20 16:31:52,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-20 16:31:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-20 16:31:52,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-07-20 16:31:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 16:31:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 74 transitions. [2020-07-20 16:31:52,156 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 74 transitions. Word has length 50 [2020-07-20 16:31:52,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:31:52,162 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 74 transitions. [2020-07-20 16:31:52,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 16:31:52,162 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 74 transitions. [2020-07-20 16:31:52,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-20 16:31:52,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:31:52,170 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:31:52,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:31:52,385 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:31:52,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:31:52,386 INFO L82 PathProgramCache]: Analyzing trace with hash 473825935, now seen corresponding path program 3 times [2020-07-20 16:31:52,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:31:52,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253325941] [2020-07-20 16:31:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:31:52,428 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:31:52,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:31:52,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 63 conjunts are in the unsatisfiable core [2020-07-20 16:31:52,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:31:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 16:31:53,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:31:54,980 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:31:54,981 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:31:55,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:55,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:55,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:55,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:55,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:55,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:31:55,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:56,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:56,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:56,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:57,475 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:31:58,594 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-20 16:31:58,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:59,112 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:59,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:59,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:31:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 16:31:59,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253325941] [2020-07-20 16:31:59,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:31:59,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 36 [2020-07-20 16:31:59,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897568183] [2020-07-20 16:31:59,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-20 16:31:59,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:31:59,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-20 16:31:59,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 16:31:59,354 INFO L87 Difference]: Start difference. First operand 50 states and 74 transitions. Second operand 36 states. [2020-07-20 16:32:03,240 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:32:03,711 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 16:32:07,907 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:32:08,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:08,173 INFO L93 Difference]: Finished difference Result 92 states and 147 transitions. [2020-07-20 16:32:08,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 16:32:08,182 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 50 [2020-07-20 16:32:08,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:08,184 INFO L225 Difference]: With dead ends: 92 [2020-07-20 16:32:08,185 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 16:32:08,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 59 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=511, Invalid=3149, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 16:32:08,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 16:32:08,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2020-07-20 16:32:08,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 16:32:08,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 104 transitions. [2020-07-20 16:32:08,201 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 104 transitions. Word has length 50 [2020-07-20 16:32:08,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:08,201 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 104 transitions. [2020-07-20 16:32:08,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-20 16:32:08,202 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 104 transitions. [2020-07-20 16:32:08,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 16:32:08,203 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:08,204 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:32:08,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:08,418 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:08,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:08,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1243684991, now seen corresponding path program 4 times [2020-07-20 16:32:08,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:08,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542036262] [2020-07-20 16:32:08,420 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:08,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:32:08,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:08,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 16:32:08,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:08,543 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-07-20 16:32:08,543 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 16:32:08,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542036262] [2020-07-20 16:32:08,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 16:32:08,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 16:32:08,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707766558] [2020-07-20 16:32:08,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 16:32:08,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:08,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 16:32:08,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 16:32:08,545 INFO L87 Difference]: Start difference. First operand 62 states and 104 transitions. Second operand 5 states. [2020-07-20 16:32:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:08,799 INFO L93 Difference]: Finished difference Result 99 states and 178 transitions. [2020-07-20 16:32:08,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 16:32:08,807 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-07-20 16:32:08,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:08,808 INFO L225 Difference]: With dead ends: 99 [2020-07-20 16:32:08,808 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 16:32:08,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 16:32:08,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 16:32:08,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-07-20 16:32:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 16:32:08,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 90 transitions. [2020-07-20 16:32:08,828 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 90 transitions. Word has length 62 [2020-07-20 16:32:08,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:08,829 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 90 transitions. [2020-07-20 16:32:08,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 16:32:08,829 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 90 transitions. [2020-07-20 16:32:08,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-20 16:32:08,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:08,830 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:32:09,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:09,045 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:09,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:09,045 INFO L82 PathProgramCache]: Analyzing trace with hash -617959883, now seen corresponding path program 5 times [2020-07-20 16:32:09,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:09,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647385568] [2020-07-20 16:32:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:09,092 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 16:32:09,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:09,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 16:32:09,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:09,376 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 69 proven. 36 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 16:32:09,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:32:12,292 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-20 16:32:12,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:12,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:13,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:13,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:14,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:14,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:14,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:14,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:14,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:14,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 69 proven. 52 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-07-20 16:32:15,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647385568] [2020-07-20 16:32:15,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:32:15,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 19 [2020-07-20 16:32:15,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503990440] [2020-07-20 16:32:15,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 16:32:15,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:15,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 16:32:15,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-07-20 16:32:15,046 INFO L87 Difference]: Start difference. First operand 56 states and 90 transitions. Second operand 19 states. [2020-07-20 16:32:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:16,119 INFO L93 Difference]: Finished difference Result 90 states and 130 transitions. [2020-07-20 16:32:16,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 16:32:16,124 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 64 [2020-07-20 16:32:16,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:16,126 INFO L225 Difference]: With dead ends: 90 [2020-07-20 16:32:16,127 INFO L226 Difference]: Without dead ends: 46 [2020-07-20 16:32:16,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 102 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2020-07-20 16:32:16,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-20 16:32:16,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-07-20 16:32:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 16:32:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-07-20 16:32:16,135 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 64 [2020-07-20 16:32:16,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:16,136 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-07-20 16:32:16,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 16:32:16,136 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-07-20 16:32:16,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 16:32:16,137 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:16,138 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:32:16,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:16,346 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:16,347 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 4 times [2020-07-20 16:32:16,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:16,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808459481] [2020-07-20 16:32:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:16,403 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:32:16,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:16,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-20 16:32:16,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-20 16:32:18,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:32:19,785 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:32:20,177 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:32:21,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:21,750 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:32:21,750 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:32:21,751 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:32:22,743 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:32:23,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:23,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:32:24,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:24,547 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:32:24,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:25,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:25,546 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:32:25,547 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:32:25,548 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:27,706 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 16:32:27,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:27,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:27,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:32:27,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:27,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:27,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:27,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:27,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:27,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:29,752 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or .cse0 (forall ((v_mult_~n_BEFORE_CALL_30 Int)) (< (div (+ (* |c_mult_#res| (- 1)) (* v_mult_~n_BEFORE_CALL_30 (- 1)) (- 1)) (- 4)) 3))) (forall ((v_mult_~n_BEFORE_CALL_30 Int)) (let ((.cse2 (* v_mult_~n_BEFORE_CALL_30 (- 1)))) (let ((.cse1 (div .cse2 (- 4)))) (or (< .cse1 1) (<= 3 (div (+ .cse2 (- 1)) (- 4))) (< .cse1 (+ (div (+ (* |c_mult_#res| (- 1)) .cse2) (- 4)) 1)))))) .cse0 (forall ((v_mult_~n_BEFORE_CALL_30 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_30 (- 1)))) (or (< (div .cse3 (- 4)) 1) (< (div (+ (* |c_mult_#res| (- 1)) .cse3 (- 1)) (- 4)) 3) (<= 3 (div (+ .cse3 (- 1)) (- 4)))))))) is different from false [2020-07-20 16:32:31,782 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (< |c_mult_#in~m| 1))) (and (forall ((v_prenex_4 Int)) (let ((.cse0 (* v_prenex_4 (- 1)))) (or (<= 3 (div (+ .cse0 (- 1)) (- 4))) (< (div (+ .cse0 (* |c_mult_#res| (- 1)) (- 1)) (- 4)) 3) (< (div .cse0 (- 4)) 1)))) (or .cse1 (forall ((v_mult_~n_BEFORE_CALL_30 Int)) (< (div (+ (* |c_mult_#res| (- 1)) (* v_mult_~n_BEFORE_CALL_30 (- 1)) (- 1)) (- 4)) 3))) (forall ((v_prenex_3 Int)) (let ((.cse2 (* v_prenex_3 (- 1)))) (let ((.cse3 (div .cse2 (- 4)))) (or (<= 3 (div (+ .cse2 (- 1)) (- 4))) (< .cse3 (+ (div (+ .cse2 (* |c_mult_#res| (- 1))) (- 4)) 1)) (< .cse3 1))))) .cse1)) is different from false [2020-07-20 16:32:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 5 proven. 87 refuted. 0 times theorem prover too weak. 21 trivial. 12 not checked. [2020-07-20 16:32:32,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808459481] [2020-07-20 16:32:32,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:32:32,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 45 [2020-07-20 16:32:32,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763924948] [2020-07-20 16:32:32,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-20 16:32:32,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:32:32,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-20 16:32:32,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1670, Unknown=2, NotChecked=166, Total=1980 [2020-07-20 16:32:32,146 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 45 states. [2020-07-20 16:32:32,839 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 11 [2020-07-20 16:32:35,072 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 16:32:35,881 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:32:38,683 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-07-20 16:32:39,101 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 16:32:39,711 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 14 [2020-07-20 16:32:41,050 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:32:42,441 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 16 [2020-07-20 16:32:43,197 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-07-20 16:32:43,589 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:32:43,980 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:32:43,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:32:43,984 INFO L93 Difference]: Finished difference Result 81 states and 103 transitions. [2020-07-20 16:32:43,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 16:32:43,984 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 58 [2020-07-20 16:32:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:32:43,986 INFO L225 Difference]: With dead ends: 81 [2020-07-20 16:32:43,986 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 16:32:43,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=453, Invalid=3843, Unknown=2, NotChecked=258, Total=4556 [2020-07-20 16:32:43,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 16:32:44,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 52. [2020-07-20 16:32:44,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-07-20 16:32:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 73 transitions. [2020-07-20 16:32:44,010 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 73 transitions. Word has length 58 [2020-07-20 16:32:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:32:44,014 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 73 transitions. [2020-07-20 16:32:44,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-20 16:32:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 73 transitions. [2020-07-20 16:32:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 16:32:44,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:32:44,016 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:32:44,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:44,219 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:32:44,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:32:44,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1602258660, now seen corresponding path program 5 times [2020-07-20 16:32:44,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:32:44,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1938748574] [2020-07-20 16:32:44,221 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:32:44,284 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:32:44,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:32:44,287 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 93 conjunts are in the unsatisfiable core [2020-07-20 16:32:44,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:32:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 32 proven. 80 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-07-20 16:32:46,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:32:47,458 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:32:48,434 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:32:49,429 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:32:49,728 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:32:50,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:50,465 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:32:50,466 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:32:50,466 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:32:51,429 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:32:51,730 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:32:52,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:52,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:52,210 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:32:53,660 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:53,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:32:54,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:54,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:54,990 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:32:56,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:56,037 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:32:56,037 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:32:56,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:57,500 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:32:57,895 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 16:32:58,503 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 16:32:58,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:58,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:58,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:58,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:32:58,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:32:58,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:58,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:32:58,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:32:58,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:32:58,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:33:00,540 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or .cse0 (forall ((v_mult_~n_BEFORE_CALL_42 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_42 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 5)) 3))) (forall ((v_mult_~n_BEFORE_CALL_42 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_42 (- 1)))) (let ((.cse2 (div .cse1 (- 5)))) (or (<= 3 (div (+ .cse1 (- 1)) (- 5))) (< .cse2 1) (< .cse2 (+ (div (+ .cse1 (* |c_mult_#res| (- 1))) (- 5)) 1)))))) .cse0 (forall ((v_mult_~n_BEFORE_CALL_42 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_42 (- 1)))) (or (<= 3 (div (+ .cse3 (- 1)) (- 5))) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 5)) 3) (< (div .cse3 (- 5)) 1)))))) is different from false [2020-07-20 16:33:02,568 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or .cse0 (forall ((v_mult_~n_BEFORE_CALL_42 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_42 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 5)) 3))) .cse0 (forall ((v_prenex_6 Int)) (let ((.cse1 (* v_prenex_6 (- 1)))) (or (< (div .cse1 (- 5)) 1) (<= 3 (div (+ .cse1 (- 1)) (- 5))) (< (div (+ .cse1 (* |c_mult_#res| (- 1)) (- 1)) (- 5)) 3)))) (forall ((v_prenex_5 Int)) (let ((.cse3 (* v_prenex_5 (- 1)))) (let ((.cse2 (div .cse3 (- 5)))) (or (< .cse2 (+ (div (+ .cse3 (* |c_mult_#res| (- 1))) (- 5)) 1)) (<= 3 (div (+ .cse3 (- 1)) (- 5))) (< .cse2 1))))))) is different from false [2020-07-20 16:33:02,916 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 5 proven. 123 refuted. 0 times theorem prover too weak. 28 trivial. 14 not checked. [2020-07-20 16:33:02,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1938748574] [2020-07-20 16:33:02,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:33:02,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 29] total 50 [2020-07-20 16:33:02,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645767521] [2020-07-20 16:33:02,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-20 16:33:02,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:33:02,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-20 16:33:02,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2106, Unknown=2, NotChecked=186, Total=2450 [2020-07-20 16:33:02,919 INFO L87 Difference]: Start difference. First operand 52 states and 73 transitions. Second operand 50 states. [2020-07-20 16:33:44,320 WARN L193 SmtUtils]: Spent 40.82 s on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-07-20 16:33:48,797 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 37 DAG size of output: 11 [2020-07-20 16:33:51,841 WARN L193 SmtUtils]: Spent 626.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 16:33:52,588 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:33:57,608 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 16:33:59,607 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 16:34:00,437 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:34:01,320 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 16:34:02,655 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-20 16:34:03,570 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 14 [2020-07-20 16:34:04,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:34:04,948 INFO L93 Difference]: Finished difference Result 81 states and 109 transitions. [2020-07-20 16:34:04,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 16:34:04,969 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 65 [2020-07-20 16:34:04,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:34:04,970 INFO L225 Difference]: With dead ends: 81 [2020-07-20 16:34:04,971 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 16:34:04,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=476, Invalid=4359, Unknown=3, NotChecked=274, Total=5112 [2020-07-20 16:34:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 16:34:04,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-07-20 16:34:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 16:34:04,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 84 transitions. [2020-07-20 16:34:04,985 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 84 transitions. Word has length 65 [2020-07-20 16:34:04,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:34:04,985 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 84 transitions. [2020-07-20 16:34:04,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-20 16:34:04,986 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 84 transitions. [2020-07-20 16:34:04,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 16:34:04,987 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:34:04,987 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:34:05,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:34:05,198 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:34:05,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:34:05,198 INFO L82 PathProgramCache]: Analyzing trace with hash 912513436, now seen corresponding path program 6 times [2020-07-20 16:34:05,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:34:05,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147666640] [2020-07-20 16:34:05,199 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:34:05,267 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:34:05,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:34:05,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-20 16:34:05,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:34:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-07-20 16:34:06,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:34:07,416 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:07,799 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:34:08,191 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:34:08,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:09,167 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:09,567 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:34:10,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:10,690 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:11,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:11,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:11,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:12,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:12,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:12,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:12,883 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:13,251 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:34:13,635 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:34:14,862 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:15,246 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:34:15,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:16,229 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:16,508 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:34:16,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:16,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:16,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:16,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 112 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-20 16:34:16,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147666640] [2020-07-20 16:34:16,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:34:16,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20] total 29 [2020-07-20 16:34:16,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297957970] [2020-07-20 16:34:16,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 16:34:16,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:34:16,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 16:34:16,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2020-07-20 16:34:16,857 INFO L87 Difference]: Start difference. First operand 57 states and 84 transitions. Second operand 29 states. [2020-07-20 16:34:21,718 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 16:34:24,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:34:24,196 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2020-07-20 16:34:24,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-20 16:34:24,210 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 65 [2020-07-20 16:34:24,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:34:24,211 INFO L225 Difference]: With dead ends: 73 [2020-07-20 16:34:24,211 INFO L226 Difference]: Without dead ends: 61 [2020-07-20 16:34:24,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 16:34:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-20 16:34:24,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2020-07-20 16:34:24,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 16:34:24,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 78 transitions. [2020-07-20 16:34:24,223 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 78 transitions. Word has length 65 [2020-07-20 16:34:24,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:34:24,224 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 78 transitions. [2020-07-20 16:34:24,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 16:34:24,224 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 78 transitions. [2020-07-20 16:34:24,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-20 16:34:24,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:34:24,226 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:34:24,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:34:24,435 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:34:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:34:24,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 7 times [2020-07-20 16:34:24,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:34:24,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953138062] [2020-07-20 16:34:24,438 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:34:24,520 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:34:24,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:34:24,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 105 conjunts are in the unsatisfiable core [2020-07-20 16:34:24,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:34:28,077 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 37 proven. 104 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-20 16:34:28,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:34:28,984 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:29,373 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:34:29,540 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:29,780 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:34:30,169 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:34:30,544 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:34:30,715 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:30,825 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:30,985 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:34:31,649 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:34:32,088 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2020-07-20 16:34:32,853 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:33,028 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:34:33,283 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:34:33,449 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:33,700 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:34:34,116 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:34:34,494 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:34:35,208 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 16:34:35,212 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:34:35,213 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:34:36,317 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:36,671 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:34:37,069 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:34:37,255 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:37,372 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:37,540 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:34:37,726 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:37,850 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:38,375 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 16:34:38,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:38,383 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:34:38,869 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 16:34:39,820 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:40,007 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:34:40,127 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:34:40,304 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:34:40,506 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:40,625 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:40,806 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:34:41,006 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:41,135 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:41,720 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 16:34:41,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:41,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:41,729 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:34:43,158 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:43,344 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:34:43,464 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:34:43,639 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:34:43,841 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:43,961 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:34:44,543 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 16:34:44,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:44,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:34:46,075 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:46,270 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:34:46,391 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:34:47,015 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-20 16:34:47,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:47,023 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:34:47,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:48,982 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:34:48,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:48,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:48,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:50,526 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:50,771 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 16:34:50,906 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-20 16:34:51,643 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:34:52,398 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 16:34:53,497 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 16:34:53,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:53,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:53,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:34:53,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:53,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:53,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:53,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:53,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:53,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:34:55,570 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (< |c_mult_#in~m| 1))) (and (forall ((v_mult_~n_BEFORE_CALL_68 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_68 (- 1)))) (let ((.cse0 (div .cse1 (- 6)))) (or (< .cse0 1) (< .cse0 (+ (div (+ .cse1 (* |c_mult_#res| (- 1))) (- 6)) 1)) (<= 3 (div (+ .cse1 (- 1)) (- 6))))))) .cse2 (or .cse2 (forall ((v_mult_~n_BEFORE_CALL_68 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_68 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3))) (forall ((v_mult_~n_BEFORE_CALL_68 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_68 (- 1)))) (or (< (div .cse3 (- 6)) 1) (<= 3 (div (+ .cse3 (- 1)) (- 6))) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3)))))) is different from false [2020-07-20 16:34:57,597 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (< |c_mult_#in~m| 1))) (and (forall ((v_mult_~n_BEFORE_CALL_68 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_68 (- 1)))) (let ((.cse0 (div .cse1 (- 6)))) (or (< .cse0 1) (< .cse0 (+ (div (+ .cse1 (* |c_mult_#res| (- 1))) (- 6)) 1)) (<= 3 (div (+ .cse1 (- 1)) (- 6))))))) (or .cse2 (forall ((v_prenex_7 Int)) (< (div (+ (* v_prenex_7 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3))) (forall ((v_prenex_8 Int)) (let ((.cse3 (* v_prenex_8 (- 1)))) (or (<= 3 (div (+ .cse3 (- 1)) (- 6))) (< (div .cse3 (- 6)) 1) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3)))) .cse2)) is different from false [2020-07-20 16:34:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 165 refuted. 0 times theorem prover too weak. 36 trivial. 16 not checked. [2020-07-20 16:34:58,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953138062] [2020-07-20 16:34:58,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:34:58,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32] total 55 [2020-07-20 16:34:58,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775540333] [2020-07-20 16:34:58,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-20 16:34:58,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:34:58,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-20 16:34:58,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2592, Unknown=2, NotChecked=206, Total=2970 [2020-07-20 16:34:58,168 INFO L87 Difference]: Start difference. First operand 57 states and 78 transitions. Second operand 55 states. [2020-07-20 16:35:01,201 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 49 DAG size of output: 11 [2020-07-20 16:35:04,915 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 16:35:06,387 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:13,598 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 16:35:14,387 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-20 16:35:15,370 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 14 [2020-07-20 16:35:18,138 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 16:35:19,081 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 16:35:19,568 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 16:35:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:35:20,041 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2020-07-20 16:35:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 16:35:20,053 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 72 [2020-07-20 16:35:20,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:35:20,055 INFO L225 Difference]: With dead ends: 86 [2020-07-20 16:35:20,055 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 16:35:20,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=517, Invalid=5189, Unknown=2, NotChecked=298, Total=6006 [2020-07-20 16:35:20,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 16:35:20,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-07-20 16:35:20,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-07-20 16:35:20,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2020-07-20 16:35:20,067 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 72 [2020-07-20 16:35:20,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:35:20,067 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2020-07-20 16:35:20,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-20 16:35:20,068 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2020-07-20 16:35:20,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 16:35:20,069 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:35:20,069 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:35:20,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:35:20,280 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:35:20,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:35:20,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 8 times [2020-07-20 16:35:20,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:35:20,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366140408] [2020-07-20 16:35:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:35:20,382 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:35:20,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:35:20,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-20 16:35:20,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:35:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 83 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-20 16:35:22,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:35:23,005 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:35:23,198 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:35:23,330 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:35:23,511 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:35:23,691 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:35:23,804 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:35:24,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:24,829 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:35:25,009 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:35:25,121 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:35:25,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:25,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:25,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:26,348 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:26,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:26,349 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:27,293 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:35:27,670 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:35:27,855 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:27,969 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:28,145 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:28,325 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:28,571 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:29,780 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:35:30,042 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:35:30,215 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:35:30,403 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:30,517 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:30,686 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:30,875 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:30,986 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:31,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:32,036 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:35:32,221 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:35:32,335 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:35:32,501 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:35:32,679 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:33,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:33,567 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:35:33,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:33,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:33,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:34,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:34,114 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 118 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-20 16:35:34,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366140408] [2020-07-20 16:35:34,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:35:34,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 31 [2020-07-20 16:35:34,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076741591] [2020-07-20 16:35:34,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-20 16:35:34,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:35:34,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-20 16:35:34,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2020-07-20 16:35:34,117 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand 31 states. [2020-07-20 16:35:40,163 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:35:41,419 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:35:41,998 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 16:35:42,611 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 16:35:43,278 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:35:44,179 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:45,353 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:35:47,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:35:47,139 INFO L93 Difference]: Finished difference Result 87 states and 120 transitions. [2020-07-20 16:35:47,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 16:35:47,155 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2020-07-20 16:35:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:35:47,157 INFO L225 Difference]: With dead ends: 87 [2020-07-20 16:35:47,158 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 16:35:47,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=337, Invalid=2419, Unknown=0, NotChecked=0, Total=2756 [2020-07-20 16:35:47,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 16:35:47,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2020-07-20 16:35:47,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 16:35:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 82 transitions. [2020-07-20 16:35:47,183 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 82 transitions. Word has length 65 [2020-07-20 16:35:47,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:35:47,184 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 82 transitions. [2020-07-20 16:35:47,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-20 16:35:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 82 transitions. [2020-07-20 16:35:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 16:35:47,185 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:35:47,186 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:35:47,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:35:47,399 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:35:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:35:47,399 INFO L82 PathProgramCache]: Analyzing trace with hash -180332919, now seen corresponding path program 9 times [2020-07-20 16:35:47,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:35:47,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984006820] [2020-07-20 16:35:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:35:47,508 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:35:47,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:35:47,512 WARN L261 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-20 16:35:47,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:35:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 14 proven. 160 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2020-07-20 16:35:51,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:35:52,060 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:35:52,440 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:35:52,875 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:53,064 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:53,315 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:53,724 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:54,133 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:54,519 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:55,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:55,857 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:35:56,045 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:35:56,161 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:35:56,329 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:35:56,534 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:56,665 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:56,854 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:57,066 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:57,195 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:57,386 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:57,595 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:57,725 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:57,923 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:58,132 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:58,259 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:58,446 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:35:58,647 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:58,776 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:35:59,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:59,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:35:59,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:00,224 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:00,421 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:00,535 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:00,715 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:36:00,934 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:01,067 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:01,255 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:01,464 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:01,593 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:01,779 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:01,985 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:02,114 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:02,304 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:02,511 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:02,636 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:03,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:04,126 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:04,324 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:04,445 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:04,639 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:36:04,849 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:04,983 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:05,174 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:05,384 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:05,517 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:05,710 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:05,921 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:06,049 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:06,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:07,371 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:07,574 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:07,698 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:07,886 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:36:08,094 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:08,224 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:08,413 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:08,633 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:08,762 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:09,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:10,120 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:10,323 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:10,450 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:10,641 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:36:10,848 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:10,981 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:11,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:11,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:11,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:12,446 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:12,644 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:12,771 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:13,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:13,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:13,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:14,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:16,079 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:16,252 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:16,505 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:36:18,130 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:18,312 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:18,424 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:19,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:19,643 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:36:21,102 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:21,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:21,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:21,121 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:36:21,122 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:36:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 256 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2020-07-20 16:36:21,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984006820] [2020-07-20 16:36:21,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:36:21,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 35] total 48 [2020-07-20 16:36:21,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606294282] [2020-07-20 16:36:21,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-20 16:36:21,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:36:21,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-20 16:36:21,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2101, Unknown=0, NotChecked=0, Total=2256 [2020-07-20 16:36:21,248 INFO L87 Difference]: Start difference. First operand 60 states and 82 transitions. Second operand 48 states. [2020-07-20 16:36:27,143 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:34,048 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 16:36:35,129 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:36:38,164 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:40,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:36:40,172 INFO L93 Difference]: Finished difference Result 88 states and 120 transitions. [2020-07-20 16:36:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-20 16:36:40,172 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 86 [2020-07-20 16:36:40,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:36:40,173 INFO L225 Difference]: With dead ends: 88 [2020-07-20 16:36:40,174 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 16:36:40,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=522, Invalid=4734, Unknown=0, NotChecked=0, Total=5256 [2020-07-20 16:36:40,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 16:36:40,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-07-20 16:36:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 16:36:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2020-07-20 16:36:40,197 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 86 [2020-07-20 16:36:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:36:40,197 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2020-07-20 16:36:40,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-20 16:36:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2020-07-20 16:36:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-20 16:36:40,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:36:40,203 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:36:40,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:36:40,418 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:36:40,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:36:40,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1525719705, now seen corresponding path program 10 times [2020-07-20 16:36:40,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:36:40,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373033304] [2020-07-20 16:36:40,420 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:36:40,525 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:36:40,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:36:40,532 WARN L261 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-20 16:36:40,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:36:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2020-07-20 16:36:43,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:36:43,869 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:44,278 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:36:44,691 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:44,960 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:45,156 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:45,355 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:36:45,479 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:36:45,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:46,411 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:46,617 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:46,737 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:46,917 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:36:47,107 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:47,222 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:47,391 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:47,571 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:47,676 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:47,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:47,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:48,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:48,600 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:49,030 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:36:49,236 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:49,361 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:49,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:50,537 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:51,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:52,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:53,501 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:53,901 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:36:54,305 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:54,576 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:54,768 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:54,970 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:55,093 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:55,265 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:55,543 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:36:56,762 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:36:56,936 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:57,052 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:36:57,221 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:36:57,394 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:57,500 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:57,650 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:58,060 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:36:58,328 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:36:58,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:36:59,180 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:00,318 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:00,486 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:00,749 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:37:01,157 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:01,333 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:01,457 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:02,031 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 16:37:02,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:02,036 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:37:02,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:02,587 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-07-20 16:37:03,347 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:03,532 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:03,660 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:03,828 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:37:04,016 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:04,131 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:04,695 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 16:37:04,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373033304] [2020-07-20 16:37:04,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:37:04,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-20 16:37:04,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185795739] [2020-07-20 16:37:04,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 16:37:04,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:37:04,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 16:37:04,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 16:37:04,701 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand 19 states. [2020-07-20 16:37:11,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:37:11,042 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2020-07-20 16:37:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 16:37:11,055 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-07-20 16:37:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:37:11,057 INFO L225 Difference]: With dead ends: 71 [2020-07-20 16:37:11,057 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 16:37:11,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=306, Invalid=2556, Unknown=0, NotChecked=0, Total=2862 [2020-07-20 16:37:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 16:37:11,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-07-20 16:37:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 16:37:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2020-07-20 16:37:11,066 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 86 [2020-07-20 16:37:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:37:11,066 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2020-07-20 16:37:11,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 16:37:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2020-07-20 16:37:11,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 16:37:11,068 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:37:11,068 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:37:11,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:37:11,270 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:37:11,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:37:11,272 INFO L82 PathProgramCache]: Analyzing trace with hash 365189506, now seen corresponding path program 11 times [2020-07-20 16:37:11,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:37:11,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065396631] [2020-07-20 16:37:11,273 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:37:11,388 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:37:11,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:37:11,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 16:37:11,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:37:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-07-20 16:37:15,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:37:17,008 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:17,214 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:17,341 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:17,534 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:37:17,750 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:17,882 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:18,082 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:18,302 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:18,437 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:18,633 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:18,849 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:18,981 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:19,179 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:19,394 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:19,522 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:19,717 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:19,939 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:20,071 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:20,266 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:20,480 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:20,612 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:20,807 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:21,005 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:37:21,128 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:37:21,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:22,423 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:22,629 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:22,754 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:22,939 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:37:23,152 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:23,282 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:23,465 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:23,687 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:23,818 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:24,005 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:24,217 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:24,347 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:24,531 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:24,748 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:24,877 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:25,064 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:25,270 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:25,400 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:25,591 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:25,794 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:25,926 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:26,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:27,100 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:37:27,247 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:27,443 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:27,570 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:27,759 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:37:27,967 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:28,100 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:28,292 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:28,502 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:28,633 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:28,819 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:29,031 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:29,161 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:29,351 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:29,563 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:29,693 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:29,874 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:30,090 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:30,214 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:30,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:31,795 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:31,998 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:32,126 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:32,321 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:37:32,536 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:32,670 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:32,867 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:33,088 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:33,227 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:33,430 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:33,643 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:33,774 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:33,976 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:34,179 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:34,310 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:34,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:34,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:34,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:35,685 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:35,854 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:35,961 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:36,118 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:37:36,326 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:36,462 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:36,663 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:36,886 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:37,028 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:37,226 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:37,442 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:37,577 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:38,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:38,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:38,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:39,065 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:39,267 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:39,386 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:39,578 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:37:39,784 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:39,914 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:40,111 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:37:40,319 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:40,486 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:41,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:41,941 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:42,141 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:42,264 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:42,460 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:37:42,672 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:42,791 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:37:43,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:43,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:43,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:44,365 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:44,568 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:44,693 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:45,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:46,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:46,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:46,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:48,308 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:48,505 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:48,627 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:48,813 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:37:49,009 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:37:49,122 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:37:50,685 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:50,883 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:51,007 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:51,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:52,799 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:37:53,810 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:53,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:53,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:53,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:37:53,958 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 35 proven. 315 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-20 16:37:53,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065396631] [2020-07-20 16:37:53,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:37:53,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 38] total 52 [2020-07-20 16:37:53,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205652412] [2020-07-20 16:37:53,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-20 16:37:53,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:37:53,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-20 16:37:53,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2483, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 16:37:53,962 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 52 states. [2020-07-20 16:37:58,670 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:37:59,247 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:38:05,073 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 16:38:06,102 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:38:08,676 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 16:38:09,864 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:38:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:38:11,461 INFO L93 Difference]: Finished difference Result 91 states and 123 transitions. [2020-07-20 16:38:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-20 16:38:11,461 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 93 [2020-07-20 16:38:11,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:38:11,462 INFO L225 Difference]: With dead ends: 91 [2020-07-20 16:38:11,462 INFO L226 Difference]: Without dead ends: 81 [2020-07-20 16:38:11,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=592, Invalid=5570, Unknown=0, NotChecked=0, Total=6162 [2020-07-20 16:38:11,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-20 16:38:11,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 66. [2020-07-20 16:38:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 16:38:11,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 89 transitions. [2020-07-20 16:38:11,486 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 89 transitions. Word has length 93 [2020-07-20 16:38:11,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:38:11,486 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 89 transitions. [2020-07-20 16:38:11,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-20 16:38:11,486 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 89 transitions. [2020-07-20 16:38:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 16:38:11,489 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:38:11,489 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:38:11,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:38:11,704 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:38:11,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:38:11,704 INFO L82 PathProgramCache]: Analyzing trace with hash -567080281, now seen corresponding path program 12 times [2020-07-20 16:38:11,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:38:11,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790340983] [2020-07-20 16:38:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:38:11,836 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:38:11,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:38:11,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 16:38:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:38:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 10 proven. 228 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-07-20 16:38:15,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:38:15,928 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:38:16,102 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:38:16,215 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:38:16,394 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:38:16,576 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:16,691 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:16,872 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:17,065 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:17,190 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:17,366 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:17,560 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:17,681 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:17,859 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:18,046 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:38:18,163 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:38:18,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:19,225 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:38:19,412 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:38:19,523 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:38:19,678 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:38:19,848 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:20,099 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:20,270 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:20,376 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:20,528 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:20,698 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:20,812 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:21,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:21,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:21,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:21,933 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:38:22,103 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:38:22,208 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:38:22,367 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:38:22,542 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:22,648 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:22,803 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:22,972 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:23,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:24,157 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:38:24,578 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:38:25,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:26,069 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:38:26,336 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:38:26,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:27,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:27,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:27,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:28,960 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:38:29,363 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:38:29,643 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:29,844 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:30,056 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:30,187 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:30,362 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:30,567 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:30,689 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:30,854 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:31,029 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:31,138 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:31,292 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:32,816 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:38:33,217 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:38:33,387 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:33,640 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:34,060 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:34,231 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:34,336 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:34,510 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:34,709 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:34,830 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:35,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:36,811 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:38:37,253 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:38:37,430 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:37,543 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:37,700 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:37,871 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:37,980 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:38,134 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:38,308 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:39,071 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 16:38:39,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:39,078 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:38:39,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:39,677 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-07-20 16:38:40,518 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:38:40,779 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:38:40,970 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:38:41,165 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:41,272 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:41,434 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:41,612 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:41,720 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:42,300 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 16:38:42,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790340983] [2020-07-20 16:38:42,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:38:42,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 16:38:42,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614320390] [2020-07-20 16:38:42,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 16:38:42,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:38:42,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 16:38:42,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1834, Unknown=0, NotChecked=0, Total=1980 [2020-07-20 16:38:42,306 INFO L87 Difference]: Start difference. First operand 66 states and 89 transitions. Second operand 21 states. [2020-07-20 16:38:50,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:38:50,519 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2020-07-20 16:38:50,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 16:38:50,534 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-07-20 16:38:50,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:38:50,535 INFO L225 Difference]: With dead ends: 74 [2020-07-20 16:38:50,535 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 16:38:50,537 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=362, Invalid=3178, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 16:38:50,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 16:38:50,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-07-20 16:38:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 16:38:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 88 transitions. [2020-07-20 16:38:50,545 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 88 transitions. Word has length 100 [2020-07-20 16:38:50,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:38:50,545 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 88 transitions. [2020-07-20 16:38:50,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 16:38:50,546 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 88 transitions. [2020-07-20 16:38:50,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-20 16:38:50,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:38:50,547 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:38:50,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:38:50,764 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:38:50,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:38:50,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1343946330, now seen corresponding path program 13 times [2020-07-20 16:38:50,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:38:50,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082304] [2020-07-20 16:38:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:38:50,904 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:38:50,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:38:50,908 WARN L261 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-20 16:38:50,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:38:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 8 proven. 195 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-20 16:38:53,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:38:54,784 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:38:54,993 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:55,118 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:55,299 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:55,500 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:55,627 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:55,805 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:55,996 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:38:56,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:57,029 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:38:57,423 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:38:57,610 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:57,724 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:57,870 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:38:58,071 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:58,188 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:58,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:38:59,161 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:38:59,564 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:38:59,749 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:38:59,871 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:00,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:00,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:00,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:00,967 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:39:01,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:01,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:01,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:02,094 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:39:02,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:02,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:02,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:03,680 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:39:03,952 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:39:04,122 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:39:04,321 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:04,450 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:04,631 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:04,836 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:04,963 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:05,144 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:05,557 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:05,960 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:07,340 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:39:07,718 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:39:08,105 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:08,488 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:08,904 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:09,116 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:09,281 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:09,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:10,445 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 16:39:11,335 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:39:11,757 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:39:11,944 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:12,060 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:12,230 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:12,418 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:12,533 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:12,707 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:12,896 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:13,011 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:17,587 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:39:17,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:17,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:39:17,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-20 16:39:19,172 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:39:19,337 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:39:19,595 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:39:19,799 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:19,934 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:20,124 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:20,334 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:20,463 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:21,147 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 16:39:21,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082304] [2020-07-20 16:39:21,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:39:21,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-20 16:39:21,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298507079] [2020-07-20 16:39:21,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 16:39:21,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:39:21,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 16:39:21,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1670, Unknown=2, NotChecked=0, Total=1806 [2020-07-20 16:39:21,155 INFO L87 Difference]: Start difference. First operand 66 states and 88 transitions. Second operand 21 states. [2020-07-20 16:39:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:39:32,102 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-07-20 16:39:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 16:39:32,118 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-07-20 16:39:32,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:39:32,119 INFO L225 Difference]: With dead ends: 74 [2020-07-20 16:39:32,119 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 16:39:32,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=335, Invalid=2968, Unknown=3, NotChecked=0, Total=3306 [2020-07-20 16:39:32,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 16:39:32,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-07-20 16:39:32,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-20 16:39:32,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions. [2020-07-20 16:39:32,133 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 93 [2020-07-20 16:39:32,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:39:32,133 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 84 transitions. [2020-07-20 16:39:32,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 16:39:32,134 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions. [2020-07-20 16:39:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 16:39:32,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:39:32,135 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:39:32,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:39:32,347 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:39:32,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:39:32,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1182847487, now seen corresponding path program 14 times [2020-07-20 16:39:32,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:39:32,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935224570] [2020-07-20 16:39:32,348 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:39:32,501 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:39:32,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:39:32,505 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 16:39:32,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:39:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 18 proven. 229 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2020-07-20 16:39:37,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:39:39,072 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:39:39,279 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:39:39,408 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:39:39,605 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:39:39,823 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:39,960 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:40,153 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:40,381 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:40,518 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:40,715 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:40,933 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:41,065 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:41,265 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:41,482 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:41,612 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:41,812 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:42,025 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:42,156 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:42,360 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:42,581 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:42,714 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:42,913 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:43,130 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:43,258 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:43,457 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:43,667 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:39:43,788 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:39:44,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:45,185 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:39:45,391 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:39:45,520 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:39:45,709 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:39:45,926 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:46,059 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:46,254 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:46,476 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:46,612 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:46,809 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:47,021 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:47,159 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:47,356 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:47,570 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:47,702 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:47,900 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:48,117 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:48,250 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:48,456 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:48,670 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:48,802 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:49,002 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:49,222 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:49,354 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:49,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:49,900 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:49,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:51,032 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:39:51,237 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:39:51,367 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:39:51,568 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:39:51,783 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:51,920 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:52,117 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:52,338 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:52,472 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:52,679 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:52,902 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:53,039 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:53,240 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:53,463 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:53,605 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:53,812 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:54,039 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:54,178 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:54,377 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:54,598 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:54,744 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:55,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:55,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:55,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:39:56,228 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:39:56,439 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:39:56,570 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:39:56,770 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:39:56,992 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:57,129 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:57,328 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:57,547 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:57,683 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:57,875 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:58,096 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:58,231 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:58,431 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:58,651 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:58,784 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:58,992 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:39:59,212 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:59,350 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:39:59,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:01,070 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:40:01,278 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:01,409 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:01,609 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:40:01,836 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:01,973 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:02,173 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:40:02,396 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:02,530 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:02,734 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:40:02,953 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:03,091 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:03,301 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:40:03,537 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:03,680 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:04,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:05,432 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:40:05,645 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:05,777 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:05,982 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:40:06,209 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:06,351 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:06,559 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:40:06,790 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:06,931 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:07,127 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:40:07,343 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:07,481 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:08,100 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:08,994 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:40:09,175 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:09,289 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:09,458 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:40:09,651 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:09,767 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:09,940 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:40:10,117 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:10,229 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:10,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:11,676 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:40:11,861 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:11,978 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:12,150 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:40:12,344 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:12,461 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:13,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:14,002 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:40:14,179 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:14,283 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:14,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:16,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:17,878 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:40:18,073 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:18,190 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:18,372 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:40:18,558 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:40:18,670 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:40:20,342 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:40:20,545 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:20,670 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:21,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:22,329 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 16:40:23,088 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:40:24,359 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 16:40:24,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:24,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:24,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:24,589 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 380 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-07-20 16:40:24,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935224570] [2020-07-20 16:40:24,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:40:24,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 41] total 56 [2020-07-20 16:40:24,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086720086] [2020-07-20 16:40:24,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-20 16:40:24,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:40:24,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-20 16:40:24,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2897, Unknown=0, NotChecked=0, Total=3080 [2020-07-20 16:40:24,592 INFO L87 Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 56 states. [2020-07-20 16:40:32,187 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:40:32,928 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:40:43,294 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 16:40:44,297 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 16:40:45,405 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:48,093 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:40:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:40:50,819 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2020-07-20 16:40:50,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 16:40:50,834 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 100 [2020-07-20 16:40:50,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:40:50,835 INFO L225 Difference]: With dead ends: 92 [2020-07-20 16:40:50,835 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 16:40:50,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 138 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=666, Invalid=6474, Unknown=0, NotChecked=0, Total=7140 [2020-07-20 16:40:50,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 16:40:50,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 67. [2020-07-20 16:40:50,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 16:40:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-07-20 16:40:50,845 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 100 [2020-07-20 16:40:50,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:40:50,845 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-07-20 16:40:50,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-20 16:40:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-07-20 16:40:50,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-20 16:40:50,847 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:40:50,847 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:40:51,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:40:51,062 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:40:51,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:40:51,063 INFO L82 PathProgramCache]: Analyzing trace with hash -192564829, now seen corresponding path program 15 times [2020-07-20 16:40:51,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:40:51,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194031394] [2020-07-20 16:40:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:40:51,235 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:40:51,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:40:51,240 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-20 16:40:51,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:40:54,984 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 233 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-07-20 16:40:54,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:40:55,877 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:40:56,062 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:56,191 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:56,369 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:40:56,561 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:56,685 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:56,886 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:40:57,094 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:57,222 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:57,405 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:40:57,597 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:40:57,708 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:40:58,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:40:58,865 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:40:59,056 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:59,172 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:40:59,347 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:40:59,538 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:59,648 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:40:59,827 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:00,012 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:00,130 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:00,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:01,239 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:41:01,433 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:01,556 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:01,736 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:41:01,936 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:02,063 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:02,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:03,369 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:41:03,539 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:04,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:04,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:04,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:05,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:05,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:05,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:06,491 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:41:06,666 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:06,772 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:06,936 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:41:07,145 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:07,274 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:07,472 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:07,690 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:07,822 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:08,016 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:08,225 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:08,345 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:08,535 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:08,739 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:08,866 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:09,053 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:09,255 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:09,373 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:09,546 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:09,732 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:41:09,842 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:41:11,225 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:41:11,397 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:11,506 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:11,671 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:41:11,856 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:11,965 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:12,135 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:12,315 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:12,428 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:12,603 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:12,824 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:12,944 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:13,134 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:13,348 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:13,476 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:13,656 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:13,847 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:13,967 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:14,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:15,125 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:15,704 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:16,118 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:41:16,282 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:16,390 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:16,543 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:41:16,716 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:16,841 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:17,041 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:17,252 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:17,381 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:17,574 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:17,784 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:17,911 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:18,090 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:18,288 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:18,408 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:21,049 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-20 16:41:21,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:21,056 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:41:21,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:21,703 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-07-20 16:41:22,646 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:41:23,056 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:41:23,233 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:23,342 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:23,506 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:23,731 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:23,865 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:24,074 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:24,283 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:24,413 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:25,034 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 16:41:25,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194031394] [2020-07-20 16:41:25,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:41:25,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 16:41:25,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573504923] [2020-07-20 16:41:25,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 16:41:25,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:41:25,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 16:41:25,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1840, Unknown=1, NotChecked=0, Total=1980 [2020-07-20 16:41:25,039 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 23 states. [2020-07-20 16:41:38,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:41:38,702 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2020-07-20 16:41:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 16:41:38,703 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 100 [2020-07-20 16:41:38,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:41:38,704 INFO L225 Difference]: With dead ends: 77 [2020-07-20 16:41:38,704 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 16:41:38,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=368, Invalid=3412, Unknown=2, NotChecked=0, Total=3782 [2020-07-20 16:41:38,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 16:41:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-07-20 16:41:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 16:41:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 93 transitions. [2020-07-20 16:41:38,711 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 93 transitions. Word has length 100 [2020-07-20 16:41:38,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:41:38,712 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 93 transitions. [2020-07-20 16:41:38,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 16:41:38,712 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 93 transitions. [2020-07-20 16:41:38,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 16:41:38,714 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:41:38,714 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:41:38,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:41:38,929 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:41:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:41:38,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1612628798, now seen corresponding path program 16 times [2020-07-20 16:41:38,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:41:38,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961478889] [2020-07-20 16:41:38,931 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:41:39,166 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:41:39,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:41:39,171 WARN L261 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-20 16:41:39,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:41:43,470 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 10 proven. 269 refuted. 0 times theorem prover too weak. 308 trivial. 0 not checked. [2020-07-20 16:41:43,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:41:44,588 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:41:44,798 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:44,932 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:45,131 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:41:45,349 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:45,491 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:45,693 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:45,915 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:46,052 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:46,263 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:46,484 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:46,615 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:46,831 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:47,048 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:41:47,176 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:41:47,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:48,496 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:41:48,707 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:48,837 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:49,040 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:41:49,272 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:49,413 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:49,618 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:49,843 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:49,982 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:50,184 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:50,409 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:50,548 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:51,056 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:51,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:51,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:51,926 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:41:52,141 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:52,280 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:52,484 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:41:52,704 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:52,848 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:53,055 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:41:53,277 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:53,419 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:53,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:53,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:53,961 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:54,576 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:41:54,683 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:41:54,844 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:41:55,059 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:55,195 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:55,399 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:41:55,626 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:55,767 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:41:56,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:57,028 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:41:57,133 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:41:57,290 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:41:57,502 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:57,634 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:41:58,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:58,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:58,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:59,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:59,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:41:59,469 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:00,775 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:42:01,034 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:42:01,242 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:01,380 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:01,583 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:42:01,808 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:01,939 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:02,143 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:02,364 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:02,502 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:02,713 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:02,937 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:03,073 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:03,276 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:03,499 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:03,636 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:03,840 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:04,063 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:04,203 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:04,405 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:04,619 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:42:04,755 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:42:06,179 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:42:06,284 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:42:06,446 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:42:06,661 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:06,793 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:06,998 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:42:07,230 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:07,371 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:07,581 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:07,805 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:07,941 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:08,140 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:08,363 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:08,500 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:08,707 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:08,934 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:09,074 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:09,294 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:09,494 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:09,629 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:10,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:11,539 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:42:11,778 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:42:12,018 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:42:12,219 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:12,338 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:12,523 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:42:12,727 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:12,847 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:13,031 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:13,235 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:13,358 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:13,540 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:13,760 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:13,901 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:14,106 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:14,331 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:14,469 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:15,382 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:42:15,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:15,388 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:42:15,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:16,403 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-07-20 16:42:17,505 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 16:42:17,915 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:42:18,094 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:18,359 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:42:18,640 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:18,842 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:19,064 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:19,202 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:19,386 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:19,596 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:19,719 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:20,363 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 16:42:20,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961478889] [2020-07-20 16:42:20,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:42:20,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 16:42:20,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163229391] [2020-07-20 16:42:20,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 16:42:20,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:42:20,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 16:42:20,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2012, Unknown=0, NotChecked=0, Total=2162 [2020-07-20 16:42:20,371 INFO L87 Difference]: Start difference. First operand 69 states and 93 transitions. Second operand 23 states. [2020-07-20 16:42:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:42:31,179 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2020-07-20 16:42:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 16:42:31,196 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 107 [2020-07-20 16:42:31,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:42:31,197 INFO L225 Difference]: With dead ends: 77 [2020-07-20 16:42:31,197 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 16:42:31,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=396, Invalid=3636, Unknown=0, NotChecked=0, Total=4032 [2020-07-20 16:42:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 16:42:31,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2020-07-20 16:42:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 16:42:31,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 92 transitions. [2020-07-20 16:42:31,209 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 92 transitions. Word has length 107 [2020-07-20 16:42:31,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:42:31,209 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 92 transitions. [2020-07-20 16:42:31,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 16:42:31,210 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 92 transitions. [2020-07-20 16:42:31,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-20 16:42:31,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:42:31,212 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:42:31,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:42:31,425 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:42:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:42:31,426 INFO L82 PathProgramCache]: Analyzing trace with hash -547887379, now seen corresponding path program 17 times [2020-07-20 16:42:31,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:42:31,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129861821] [2020-07-20 16:42:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:42:31,619 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:42:31,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:42:31,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-20 16:42:31,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:42:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 12 proven. 308 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-07-20 16:42:35,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:42:36,712 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:42:36,816 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:42:36,971 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:42:37,183 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:37,321 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:37,520 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:42:37,754 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:37,892 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:38,104 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:38,329 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:38,468 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:38,665 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:38,882 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:39,018 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:39,213 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:39,571 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:39,801 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:42:39,933 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:42:40,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:41,188 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:42:41,373 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:41,485 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:41,647 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:42:41,839 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:41,955 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:42,131 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:42,326 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:42,433 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:42,623 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:42,849 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:42,989 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:43,175 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:43,384 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:43,518 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:43,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:43,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:43,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:44,764 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:42:44,961 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:45,092 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:45,286 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:42:45,513 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:45,658 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:45,845 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:46,043 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:46,157 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:46,329 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:46,521 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:46,636 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:47,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:47,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:47,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:47,793 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:42:47,982 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:48,099 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:48,267 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:42:48,441 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:48,556 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:48,726 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:48,897 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:49,004 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:49,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:50,219 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:42:50,407 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:50,516 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:50,676 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:42:50,862 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:50,975 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:51,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:51,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:51,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:52,257 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:42:52,426 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:52,533 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:52,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:54,105 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:42:55,497 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:42:55,675 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:55,797 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:42:55,985 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:42:56,179 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:56,300 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:56,482 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:56,660 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:56,780 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:56,951 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:57,134 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:57,251 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:57,405 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:57,579 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:57,690 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:57,883 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:58,108 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:58,235 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:42:58,420 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:42:58,616 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:42:58,726 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:43:00,202 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:43:00,387 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:00,491 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:00,668 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:43:00,852 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:01,117 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:01,287 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:01,393 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:01,547 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:01,724 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:01,854 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:02,058 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:02,263 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:02,391 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:02,584 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:02,791 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:02,906 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:03,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:43:04,723 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-20 16:43:05,182 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:43:05,365 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:05,479 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:05,641 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:43:05,832 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:05,938 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:06,099 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:06,271 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:06,381 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:06,542 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:06,824 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:06,979 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:07,164 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:07,295 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:08,061 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 16:43:08,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:43:08,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:43:08,088 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-20 16:43:08,813 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2020-07-20 16:43:09,786 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:43:09,997 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:10,130 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:10,328 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:43:10,540 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:10,658 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:10,837 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:11,015 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:11,132 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:11,304 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:11,511 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:11,620 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:12,272 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-20 16:43:12,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129861821] [2020-07-20 16:43:12,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 16:43:12,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-20 16:43:12,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554125590] [2020-07-20 16:43:12,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 16:43:12,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:43:12,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 16:43:12,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2192, Unknown=0, NotChecked=0, Total=2352 [2020-07-20 16:43:12,286 INFO L87 Difference]: Start difference. First operand 69 states and 92 transitions. Second operand 23 states. [2020-07-20 16:43:17,152 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 16:43:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:43:24,625 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2020-07-20 16:43:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 16:43:24,626 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2020-07-20 16:43:24,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:43:24,627 INFO L225 Difference]: With dead ends: 77 [2020-07-20 16:43:24,627 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 16:43:24,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=422, Invalid=3868, Unknown=0, NotChecked=0, Total=4290 [2020-07-20 16:43:24,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 16:43:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2020-07-20 16:43:24,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 16:43:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2020-07-20 16:43:24,637 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 114 [2020-07-20 16:43:24,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:43:24,638 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2020-07-20 16:43:24,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 16:43:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2020-07-20 16:43:24,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 16:43:24,639 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:43:24,640 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:43:24,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:43:24,854 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:43:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:43:24,855 INFO L82 PathProgramCache]: Analyzing trace with hash -445760116, now seen corresponding path program 18 times [2020-07-20 16:43:24,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:43:24,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986764175] [2020-07-20 16:43:24,857 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 [2020-07-20 16:43:25,065 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:43:25,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:43:25,070 WARN L261 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-20 16:43:25,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:43:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-20 16:43:31,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:43:32,886 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:43:32,994 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:43:33,160 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:43:33,371 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:33,504 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:33,709 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:43:33,926 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:34,050 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:34,227 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:34,416 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:34,538 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:34,707 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:34,900 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:35,027 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:35,185 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:35,371 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:35,494 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:35,688 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:35,926 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:36,061 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:36,239 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:36,431 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:36,551 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:36,714 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:36,892 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:37,022 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:37,191 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:37,382 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:37,494 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:37,660 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:38,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:43:39,327 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:43:39,487 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:43:39,704 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:39,850 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:40,062 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:43:40,290 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:40,437 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:40,642 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:40,890 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:41,072 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:41,368 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:41,499 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 16:43:41,691 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:41,895 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:42,203 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:42,533 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:42,736 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:42,941 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:43,163 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:43,297 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:43,501 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:43,721 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:43,857 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:44,061 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:44,283 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:44,414 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:44,626 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:44,856 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:44,995 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:45,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:43:46,487 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:43:46,699 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:46,837 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:47,028 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:43:47,254 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:47,391 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:47,587 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:47,813 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:47,950 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:48,150 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:48,377 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:48,512 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:48,715 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:48,948 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:49,087 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:49,288 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:49,512 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:49,648 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:49,849 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:50,073 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:50,209 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:50,413 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:50,637 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:50,778 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:51,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:43:52,583 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:43:52,784 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:52,905 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:53,085 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:43:53,276 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:53,387 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:53,562 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:53,746 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:53,856 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:54,010 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:54,420 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:54,591 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:54,712 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:54,916 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:55,134 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:55,269 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:55,457 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:55,662 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:55,776 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:56,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:43:57,045 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:43:57,214 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:57,348 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:43:57,544 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:43:57,754 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:57,880 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:58,063 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:58,255 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:58,372 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:58,543 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:58,721 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:58,829 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:58,990 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:59,161 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:59,269 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:59,425 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:43:59,625 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:43:59,749 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:00,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:01,245 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:44:01,411 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:01,518 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:01,669 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:44:01,881 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:02,017 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:02,209 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:44:02,407 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:02,521 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:02,701 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:44:02,887 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:03,004 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:03,176 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:44:03,354 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:03,461 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:04,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:04,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:04,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:05,083 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:44:05,279 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:05,402 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:05,570 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:44:05,769 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:05,890 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:06,057 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:44:06,263 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:06,400 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:06,588 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:44:06,784 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:06,898 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:07,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:08,309 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:44:08,527 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:08,650 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:08,841 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:44:09,037 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:09,159 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:09,324 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:44:09,507 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:09,624 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:10,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:10,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:10,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:11,030 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:44:11,229 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:11,349 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:11,535 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:44:11,742 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:11,860 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:44:12,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:13,410 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:44:13,582 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:13,691 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:14,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:14,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:14,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:15,682 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-20 16:44:15,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:17,879 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:44:18,171 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:18,339 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:44:18,510 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:44:18,616 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:44:20,361 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:44:20,540 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:21,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:22,053 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:44:23,764 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:44:23,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:23,771 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:44:23,772 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-20 16:44:23,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:44:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 41 proven. 451 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-07-20 16:44:23,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986764175] [2020-07-20 16:44:23,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 16:44:23,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 44] total 60 [2020-07-20 16:44:23,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481449917] [2020-07-20 16:44:23,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-20 16:44:23,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 16:44:23,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-20 16:44:23,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3343, Unknown=0, NotChecked=0, Total=3540 [2020-07-20 16:44:23,974 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand 60 states. [2020-07-20 16:44:32,217 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:44:33,024 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-20 16:44:41,594 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 16:44:46,440 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-20 16:44:47,403 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:44:50,471 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:44:51,855 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-20 16:44:55,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 16:44:55,098 INFO L93 Difference]: Finished difference Result 95 states and 125 transitions. [2020-07-20 16:44:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-20 16:44:55,113 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 107 [2020-07-20 16:44:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 16:44:55,115 INFO L225 Difference]: With dead ends: 95 [2020-07-20 16:44:55,115 INFO L226 Difference]: Without dead ends: 85 [2020-07-20 16:44:55,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 148 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=744, Invalid=7446, Unknown=0, NotChecked=0, Total=8190 [2020-07-20 16:44:55,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-07-20 16:44:55,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 70. [2020-07-20 16:44:55,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-20 16:44:55,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 92 transitions. [2020-07-20 16:44:55,125 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 92 transitions. Word has length 107 [2020-07-20 16:44:55,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 16:44:55,126 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 92 transitions. [2020-07-20 16:44:55,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-20 16:44:55,126 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 92 transitions. [2020-07-20 16:44:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-20 16:44:55,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 16:44:55,127 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 16:44:55,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 16:44:55,333 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 16:44:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 16:44:55,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1051174864, now seen corresponding path program 19 times [2020-07-20 16:44:55,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 16:44:55,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914809640] [2020-07-20 16:44:55,334 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 [2020-07-20 16:44:55,549 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 16:44:55,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 16:44:55,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-20 16:44:55,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 16:44:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 8 proven. 274 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2020-07-20 16:44:59,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 16:45:00,725 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:45:01,001 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:45:01,237 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:45:01,370 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-20 16:45:01,570 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:45:01,745 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:45:01,980 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:45:02,242 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:45:02,420 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:45:02,644 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:45:02,846 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:45:02,961 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-20 16:45:03,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 16:45:04,276 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-20 16:45:04,469 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:45:04,602 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-20 16:45:04,771 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-20 16:45:04,959 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:45:05,073 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:45:05,255 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-20 16:45:05,448 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-20 16:45:05,608 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 20