/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -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 [2020-07-21 12:57:32,172 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-21 12:57:32,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 12:57:32,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 12:57:32,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 12:57:32,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 12:57:32,214 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 12:57:32,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 12:57:32,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 12:57:32,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 12:57:32,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 12:57:32,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 12:57:32,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 12:57:32,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 12:57:32,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 12:57:32,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 12:57:32,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 12:57:32,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 12:57:32,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 12:57:32,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 12:57:32,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 12:57:32,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 12:57:32,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 12:57:32,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 12:57:32,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 12:57:32,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 12:57:32,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 12:57:32,272 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 12:57:32,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 12:57:32,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 12:57:32,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 12:57:32,274 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 12:57:32,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 12:57:32,275 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 12:57:32,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 12:57:32,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 12:57:32,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 12:57:32,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 12:57:32,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 12:57:32,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 12:57:32,276 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 12:57:32,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 12:57:32,277 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 12:57:32,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 12:57:32,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 12:57:32,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 12:57:32,277 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 12:57:32,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 12:57:32,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:57:32,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 12:57:32,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 12:57:32,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 12:57:32,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 12:57:32,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:32,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 12:57:32,279 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 12:57:32,279 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 12:57:32,545 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 12:57:32,563 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 12:57:32,567 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 12:57:32,569 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 12:57:32,572 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 12:57:32,573 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-21 12:57:32,647 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bc75cacb/65a5db3bf15c489c8bde8ba43bfa2aa1/FLAG8127cffeb [2020-07-21 12:57:33,124 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 12:57:33,126 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-07-21 12:57:33,134 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bc75cacb/65a5db3bf15c489c8bde8ba43bfa2aa1/FLAG8127cffeb [2020-07-21 12:57:33,535 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bc75cacb/65a5db3bf15c489c8bde8ba43bfa2aa1 [2020-07-21 12:57:33,546 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 12:57:33,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 12:57:33,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 12:57:33,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 12:57:33,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 12:57:33,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:57:33" (1/1) ... [2020-07-21 12:57:33,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f0e332a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:33, skipping insertion in model container [2020-07-21 12:57:33,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:57:33" (1/1) ... [2020-07-21 12:57:33,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 12:57:33,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 12:57:33,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:57:33,746 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 12:57:33,764 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 12:57:33,779 INFO L208 MainTranslator]: Completed translation [2020-07-21 12:57:33,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:33 WrapperNode [2020-07-21 12:57:33,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 12:57:33,780 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 12:57:33,780 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 12:57:33,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 12:57:33,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:33" (1/1) ... [2020-07-21 12:57:33,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:33" (1/1) ... [2020-07-21 12:57:33,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:33" (1/1) ... [2020-07-21 12:57:33,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:33" (1/1) ... [2020-07-21 12:57:33,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:33" (1/1) ... [2020-07-21 12:57:33,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:33" (1/1) ... [2020-07-21 12:57:33,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:33" (1/1) ... [2020-07-21 12:57:33,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 12:57:33,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 12:57:33,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 12:57:33,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 12:57:33,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 12:57:33,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 12:57:33,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 12:57:33,949 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-07-21 12:57:33,949 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 12:57:33,949 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 12:57:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 12:57:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-07-21 12:57:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 12:57:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 12:57:33,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 12:57:34,145 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 12:57:34,146 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 12:57:34,150 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:57:34 BoogieIcfgContainer [2020-07-21 12:57:34,150 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 12:57:34,151 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 12:57:34,152 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 12:57:34,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 12:57:34,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:57:33" (1/3) ... [2020-07-21 12:57:34,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3a5f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:57:34, skipping insertion in model container [2020-07-21 12:57:34,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:57:33" (2/3) ... [2020-07-21 12:57:34,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3a5f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:57:34, skipping insertion in model container [2020-07-21 12:57:34,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:57:34" (3/3) ... [2020-07-21 12:57:34,159 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-07-21 12:57:34,170 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 12:57:34,178 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 12:57:34,193 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 12:57:34,219 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 12:57:34,219 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 12:57:34,219 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 12:57:34,220 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 12:57:34,220 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 12:57:34,220 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 12:57:34,220 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 12:57:34,220 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 12:57:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-21 12:57:34,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-07-21 12:57:34,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:34,258 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:57:34,258 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:34,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:34,270 INFO L82 PathProgramCache]: Analyzing trace with hash -962219036, now seen corresponding path program 1 times [2020-07-21 12:57:34,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:34,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986215366] [2020-07-21 12:57:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:34,385 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:57:34,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:34,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:57:34,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:34,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 12:57:34,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:34,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 12:57:34,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986215366] [2020-07-21 12:57:34,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:34,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 12:57:34,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732786322] [2020-07-21 12:57:34,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 12:57:34,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:34,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 12:57:34,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 12:57:34,617 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-07-21 12:57:34,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:34,766 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2020-07-21 12:57:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:57:34,768 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-07-21 12:57:34,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:34,780 INFO L225 Difference]: With dead ends: 41 [2020-07-21 12:57:34,780 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 12:57:34,784 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 [2020-07-21 12:57:34,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 12:57:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 12:57:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 12:57:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-07-21 12:57:34,837 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 23 [2020-07-21 12:57:34,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:34,837 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-07-21 12:57:34,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 12:57:34,838 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-07-21 12:57:34,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 12:57:34,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:34,841 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] [2020-07-21 12:57:35,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:35,056 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:35,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:35,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1472914703, now seen corresponding path program 1 times [2020-07-21 12:57:35,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:35,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023486868] [2020-07-21 12:57:35,058 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:35,103 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 12:57:35,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:35,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:57:35,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:35,140 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-21 12:57:35,140 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:57:35,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023486868] [2020-07-21 12:57:35,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:57:35,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:57:35,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8780755] [2020-07-21 12:57:35,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:57:35,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:35,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:57:35,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:57:35,144 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 5 states. [2020-07-21 12:57:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:35,246 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-21 12:57:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:57:35,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-07-21 12:57:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:35,249 INFO L225 Difference]: With dead ends: 29 [2020-07-21 12:57:35,250 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 12:57:35,252 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 [2020-07-21 12:57:35,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 12:57:35,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 12:57:35,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 12:57:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2020-07-21 12:57:35,267 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2020-07-21 12:57:35,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:35,268 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2020-07-21 12:57:35,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:57:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2020-07-21 12:57:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-21 12:57:35,273 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:35,273 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] [2020-07-21 12:57:35,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:35,491 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:35,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:35,492 INFO L82 PathProgramCache]: Analyzing trace with hash 746268336, now seen corresponding path program 2 times [2020-07-21 12:57:35,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:35,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589442023] [2020-07-21 12:57:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:35,546 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:35,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-21 12:57:35,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 12:57:35,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:36,006 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 12:57:36,012 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 12:57:36,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,202 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:57:36,204 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:57:36,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,206 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:57:36,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:57:36,208 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:57:36,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,547 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 12:57:36,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:57:36,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:57:36,560 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 12:57:36,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:57:36,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:36,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:57:36,569 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 12:57:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 12:57:36,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589442023] [2020-07-21 12:57:36,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:36,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 22 [2020-07-21 12:57:36,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077458110] [2020-07-21 12:57:36,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 12:57:36,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:36,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 12:57:36,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2020-07-21 12:57:36,598 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 22 states. [2020-07-21 12:57:37,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:37,037 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-07-21 12:57:37,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 12:57:37,038 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2020-07-21 12:57:37,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:37,039 INFO L225 Difference]: With dead ends: 40 [2020-07-21 12:57:37,040 INFO L226 Difference]: Without dead ends: 36 [2020-07-21 12:57:37,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2020-07-21 12:57:37,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-21 12:57:37,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-07-21 12:57:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 12:57:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2020-07-21 12:57:37,055 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 37 [2020-07-21 12:57:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:37,055 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2020-07-21 12:57:37,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 12:57:37,056 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2020-07-21 12:57:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-21 12:57:37,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:37,058 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] [2020-07-21 12:57:37,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:37,273 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:37,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:37,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1882602408, now seen corresponding path program 1 times [2020-07-21 12:57:37,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:37,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6927871] [2020-07-21 12:57:37,275 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:37,315 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:37,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:37,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 12:57:37,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-07-21 12:57:37,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:37,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:37,471 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-07-21 12:57:37,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6927871] [2020-07-21 12:57:37,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:37,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2020-07-21 12:57:37,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332399150] [2020-07-21 12:57:37,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-21 12:57:37,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:37,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-21 12:57:37,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-21 12:57:37,522 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand 8 states. [2020-07-21 12:57:37,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:57:37,622 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-07-21 12:57:37,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:57:37,622 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-07-21 12:57:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:57:37,624 INFO L225 Difference]: With dead ends: 39 [2020-07-21 12:57:37,625 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 12:57:37,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:57:37,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 12:57:37,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-21 12:57:37,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 12:57:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2020-07-21 12:57:37,651 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 43 [2020-07-21 12:57:37,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:57:37,652 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2020-07-21 12:57:37,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-21 12:57:37,652 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2020-07-21 12:57:37,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-21 12:57:37,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:57:37,659 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] [2020-07-21 12:57:37,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:37,878 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:57:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:57:37,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1837502139, now seen corresponding path program 3 times [2020-07-21 12:57:37,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:57:37,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867464484] [2020-07-21 12:57:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:57:37,916 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:57:37,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:57:37,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-21 12:57:37,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:57:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 12:57:38,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:57:38,394 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:57:38,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:38,596 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:57:38,598 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:57:38,598 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 12:57:38,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:38,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:38,753 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:57:38,754 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:57:39,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:39,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:39,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:57:39,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:39,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:39,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:57:39,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:57:39,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:57:39,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:57:41,207 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or (forall ((v_mult_~n_BEFORE_CALL_10 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_10 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3)) .cse0) .cse0 (forall ((v_mult_~n_BEFORE_CALL_10 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_10 (- 1)))) (let ((.cse2 (div .cse1 (- 2)))) (or (<= 3 (div (+ .cse1 (- 1)) (- 2))) (< .cse2 1) (< .cse2 (+ (div (+ .cse1 (* |c_mult_#res| (- 1))) (- 2)) 1)))))) (forall ((v_mult_~n_BEFORE_CALL_10 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_10 (- 1)))) (or (<= 3 (div (+ .cse3 (- 1)) (- 2))) (< (div .cse3 (- 2)) 1) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3)))))) is different from false [2020-07-21 12:57:43,249 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or (forall ((v_mult_~n_BEFORE_CALL_10 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_10 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3)) .cse0) (forall ((v_prenex_2 Int)) (let ((.cse1 (* v_prenex_2 (- 1)))) (or (< (div .cse1 (- 2)) 1) (< (div (+ .cse1 (* |c_mult_#res| (- 1)) (- 1)) (- 2)) 3) (<= 3 (div (+ .cse1 (- 1)) (- 2)))))) .cse0 (forall ((v_prenex_1 Int)) (let ((.cse3 (* v_prenex_1 (- 1)))) (let ((.cse2 (div .cse3 (- 2)))) (or (< .cse2 (+ (div (+ .cse3 (* |c_mult_#res| (- 1))) (- 2)) 1)) (< .cse2 1) (<= 3 (div (+ .cse3 (- 1)) (- 2))))))))) is different from false [2020-07-21 12:57:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 10 trivial. 8 not checked. [2020-07-21 12:57:43,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867464484] [2020-07-21 12:57:43,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:57:43,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2020-07-21 12:57:43,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857629606] [2020-07-21 12:57:43,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-21 12:57:43,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:57:43,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-21 12:57:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=948, Unknown=2, NotChecked=126, Total=1190 [2020-07-21 12:57:43,330 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand 35 states. [2020-07-21 12:58:26,015 WARN L193 SmtUtils]: Spent 42.44 s on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-07-21 12:58:31,169 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-07-21 12:58:31,549 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-07-21 12:58:32,108 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 12:58:32,468 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 12:58:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:36,353 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-07-21 12:58:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 12:58:36,354 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 44 [2020-07-21 12:58:36,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:36,357 INFO L225 Difference]: With dead ends: 62 [2020-07-21 12:58:36,357 INFO L226 Difference]: Without dead ends: 56 [2020-07-21 12:58:36,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 50.0s TimeCoverageRelationStatistics Valid=207, Invalid=1691, Unknown=2, NotChecked=170, Total=2070 [2020-07-21 12:58:36,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-21 12:58:36,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 44. [2020-07-21 12:58:36,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 12:58:36,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 66 transitions. [2020-07-21 12:58:36,379 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 66 transitions. Word has length 44 [2020-07-21 12:58:36,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:36,380 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 66 transitions. [2020-07-21 12:58:36,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-21 12:58:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 66 transitions. [2020-07-21 12:58:36,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 12:58:36,382 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:36,383 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 12:58:36,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:36,584 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:36,584 INFO L82 PathProgramCache]: Analyzing trace with hash -58046165, now seen corresponding path program 2 times [2020-07-21 12:58:36,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:36,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756192430] [2020-07-21 12:58:36,586 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:36,630 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:36,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:36,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 12:58:36,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-07-21 12:58:36,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 12:58:36,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756192430] [2020-07-21 12:58:36,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 12:58:36,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 12:58:36,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011035411] [2020-07-21 12:58:36,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 12:58:36,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:36,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 12:58:36,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 12:58:36,697 INFO L87 Difference]: Start difference. First operand 44 states and 66 transitions. Second operand 5 states. [2020-07-21 12:58:36,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:36,968 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-07-21 12:58:36,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 12:58:36,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-07-21 12:58:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:36,976 INFO L225 Difference]: With dead ends: 72 [2020-07-21 12:58:36,976 INFO L226 Difference]: Without dead ends: 44 [2020-07-21 12:58:36,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:58:36,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-21 12:58:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-21 12:58:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-21 12:58:36,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 63 transitions. [2020-07-21 12:58:36,987 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 63 transitions. Word has length 56 [2020-07-21 12:58:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:36,988 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 63 transitions. [2020-07-21 12:58:36,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 12:58:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 63 transitions. [2020-07-21 12:58:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-21 12:58:36,990 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:36,990 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] [2020-07-21 12:58:37,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:37,197 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:37,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:37,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1146349017, now seen corresponding path program 4 times [2020-07-21 12:58:37,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:37,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092355794] [2020-07-21 12:58:37,199 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:37,231 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:37,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:37,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 57 conjunts are in the unsatisfiable core [2020-07-21 12:58:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 12:58:38,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:58:39,082 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:58:39,083 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 12:58:39,774 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:39,775 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:39,776 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:58:39,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:58:39,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:41,556 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 3 conjuncts [2020-07-21 12:58:41,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:42,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:42,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:42,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 12:58:42,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092355794] [2020-07-21 12:58:42,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:58:42,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 32 [2020-07-21 12:58:42,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107245157] [2020-07-21 12:58:42,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 12:58:42,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:42,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 12:58:42,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2020-07-21 12:58:42,220 INFO L87 Difference]: Start difference. First operand 44 states and 63 transitions. Second operand 32 states. [2020-07-21 12:58:44,642 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 12:58:44,986 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 12:58:47,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:58:47,785 INFO L93 Difference]: Finished difference Result 78 states and 116 transitions. [2020-07-21 12:58:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-21 12:58:47,793 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 44 [2020-07-21 12:58:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:58:47,795 INFO L225 Difference]: With dead ends: 78 [2020-07-21 12:58:47,795 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 12:58:47,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=346, Invalid=2204, Unknown=0, NotChecked=0, Total=2550 [2020-07-21 12:58:47,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 12:58:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2020-07-21 12:58:47,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 12:58:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 78 transitions. [2020-07-21 12:58:47,809 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 78 transitions. Word has length 44 [2020-07-21 12:58:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:58:47,809 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 78 transitions. [2020-07-21 12:58:47,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 12:58:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 78 transitions. [2020-07-21 12:58:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 12:58:47,811 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:58:47,811 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] [2020-07-21 12:58:48,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:48,014 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:58:48,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:58:48,015 INFO L82 PathProgramCache]: Analyzing trace with hash 912513436, now seen corresponding path program 5 times [2020-07-21 12:58:48,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:58:48,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820365409] [2020-07-21 12:58:48,016 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:58:48,063 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:58:48,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:58:48,066 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 96 conjunts are in the unsatisfiable core [2020-07-21 12:58:48,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:58:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-07-21 12:58:49,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:58:50,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:51,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:51,782 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-21 12:58:52,535 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 12:58:52,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:52,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:52,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:53,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:53,079 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-21 12:58:53,976 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 12:58:54,333 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 12:58:55,498 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 12:58:55,997 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 12:58:56,644 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts [2020-07-21 12:58:56,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:56,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:56,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:57,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:57,039 INFO L501 QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts [2020-07-21 12:58:57,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:58:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-07-21 12:58:57,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820365409] [2020-07-21 12:58:57,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:58:57,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24] total 36 [2020-07-21 12:58:57,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315158842] [2020-07-21 12:58:57,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 12:58:57,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:58:57,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 12:58:57,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 12:58:57,698 INFO L87 Difference]: Start difference. First operand 51 states and 78 transitions. Second operand 36 states. [2020-07-21 12:59:00,040 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-07-21 12:59:00,501 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 16 [2020-07-21 12:59:03,610 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-07-21 12:59:04,147 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2020-07-21 12:59:04,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:04,551 INFO L93 Difference]: Finished difference Result 78 states and 112 transitions. [2020-07-21 12:59:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 12:59:04,559 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 65 [2020-07-21 12:59:04,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:04,561 INFO L225 Difference]: With dead ends: 78 [2020-07-21 12:59:04,561 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 12:59:04,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 79 SyntacticMatches, 16 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=351, Invalid=2511, Unknown=0, NotChecked=0, Total=2862 [2020-07-21 12:59:04,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 12:59:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2020-07-21 12:59:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 12:59:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 87 transitions. [2020-07-21 12:59:04,586 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 87 transitions. Word has length 65 [2020-07-21 12:59:04,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:04,588 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 87 transitions. [2020-07-21 12:59:04,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 12:59:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 87 transitions. [2020-07-21 12:59:04,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-21 12:59:04,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:59:04,590 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] [2020-07-21 12:59:04,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:04,792 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:59:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:59:04,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1850137581, now seen corresponding path program 6 times [2020-07-21 12:59:04,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:59:04,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79506481] [2020-07-21 12:59:04,794 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:04,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:59:04,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:59:04,867 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 109 conjunts are in the unsatisfiable core [2020-07-21 12:59:04,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:59:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 10 proven. 103 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-07-21 12:59:06,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:59:07,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:09,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:09,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:09,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:09,948 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 12:59:10,253 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 12:59:10,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:11,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:12,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:12,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:12,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:12,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:14,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:15,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:15,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:15,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-21 12:59:15,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79506481] [2020-07-21 12:59:15,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:59:15,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 29] total 40 [2020-07-21 12:59:15,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487607943] [2020-07-21 12:59:15,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-21 12:59:15,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:15,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-21 12:59:15,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1433, Unknown=0, NotChecked=0, Total=1560 [2020-07-21 12:59:15,853 INFO L87 Difference]: Start difference. First operand 56 states and 87 transitions. Second operand 40 states. [2020-07-21 12:59:18,465 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 12:59:24,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:24,841 INFO L93 Difference]: Finished difference Result 88 states and 136 transitions. [2020-07-21 12:59:24,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-21 12:59:24,842 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 72 [2020-07-21 12:59:24,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:24,844 INFO L225 Difference]: With dead ends: 88 [2020-07-21 12:59:24,844 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 12:59:24,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 101 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=431, Invalid=3601, Unknown=0, NotChecked=0, Total=4032 [2020-07-21 12:59:24,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 12:59:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 64. [2020-07-21 12:59:24,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 12:59:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 109 transitions. [2020-07-21 12:59:24,859 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 109 transitions. Word has length 72 [2020-07-21 12:59:24,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:24,860 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 109 transitions. [2020-07-21 12:59:24,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-21 12:59:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 109 transitions. [2020-07-21 12:59:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-21 12:59:24,862 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:59:24,862 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] [2020-07-21 12:59:25,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:25,078 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:59:25,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:59:25,079 INFO L82 PathProgramCache]: Analyzing trace with hash -272057979, now seen corresponding path program 7 times [2020-07-21 12:59:25,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:59:25,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775780797] [2020-07-21 12:59:25,080 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:25,126 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:59:25,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:59:25,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 81 conjunts are in the unsatisfiable core [2020-07-21 12:59:25,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:59:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-07-21 12:59:26,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:59:28,151 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:59:29,568 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:59:29,569 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:59:30,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:30,897 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:30,898 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 12:59:31,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:31,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:59:32,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:32,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:32,638 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:59:32,639 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:59:34,030 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 12:59:34,482 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 12:59:34,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:34,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:34,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:59:34,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:59:34,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:59:34,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:59:34,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 12:59:34,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:36,536 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and .cse0 (or .cse0 (forall ((v_mult_~n_BEFORE_CALL_52 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_52 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 4)) 3))) (forall ((v_mult_~n_BEFORE_CALL_52 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_52 (- 1)))) (or (< (div (+ .cse1 (* |c_mult_#res| (- 1)) (- 1)) (- 4)) 3) (< (div .cse1 (- 4)) 1) (<= 3 (div (+ .cse1 (- 1)) (- 4)))))) (forall ((v_mult_~n_BEFORE_CALL_52 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_52 (- 1)))) (let ((.cse2 (div .cse3 (- 4)))) (or (< .cse2 1) (<= 3 (div (+ .cse3 (- 1)) (- 4))) (< .cse2 (+ (div (+ .cse3 (* |c_mult_#res| (- 1))) (- 4)) 1)))))))) is different from false [2020-07-21 12:59:38,562 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse3 (< |c_mult_#in~m| 1))) (and (forall ((v_prenex_4 Int)) (let ((.cse0 (* v_prenex_4 (- 1)))) (let ((.cse1 (div .cse0 (- 4)))) (or (<= 3 (div (+ .cse0 (- 1)) (- 4))) (< .cse1 (+ (div (+ .cse0 (* |c_mult_#res| (- 1))) (- 4)) 1)) (< .cse1 1))))) (forall ((v_prenex_3 Int)) (let ((.cse2 (* v_prenex_3 (- 1)))) (or (< (div (+ .cse2 (* |c_mult_#res| (- 1)) (- 1)) (- 4)) 3) (<= 3 (div (+ .cse2 (- 1)) (- 4))) (< (div .cse2 (- 4)) 1)))) .cse3 (or .cse3 (forall ((v_mult_~n_BEFORE_CALL_52 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_52 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 4)) 3))))) is different from false [2020-07-21 12:59:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 5 proven. 87 refuted. 0 times theorem prover too weak. 21 trivial. 12 not checked. [2020-07-21 12:59:38,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775780797] [2020-07-21 12:59:38,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:59:38,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 45 [2020-07-21 12:59:38,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805281040] [2020-07-21 12:59:38,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-21 12:59:38,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-21 12:59:38,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1670, Unknown=2, NotChecked=166, Total=1980 [2020-07-21 12:59:38,840 INFO L87 Difference]: Start difference. First operand 64 states and 109 transitions. Second operand 45 states. [2020-07-21 12:59:39,520 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 12:59:42,091 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 49 DAG size of output: 11 [2020-07-21 12:59:43,804 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2020-07-21 12:59:44,531 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 12:59:45,489 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 12:59:48,605 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 15 [2020-07-21 12:59:49,122 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 14 [2020-07-21 12:59:50,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:50,803 INFO L93 Difference]: Finished difference Result 89 states and 133 transitions. [2020-07-21 12:59:50,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 12:59:50,810 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 58 [2020-07-21 12:59:50,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:50,812 INFO L225 Difference]: With dead ends: 89 [2020-07-21 12:59:50,813 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 12:59:50,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=414, Invalid=3498, Unknown=2, NotChecked=246, Total=4160 [2020-07-21 12:59:50,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 12:59:50,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 64. [2020-07-21 12:59:50,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 12:59:50,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 105 transitions. [2020-07-21 12:59:50,830 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 105 transitions. Word has length 58 [2020-07-21 12:59:50,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:50,830 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 105 transitions. [2020-07-21 12:59:50,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-21 12:59:50,830 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 105 transitions. [2020-07-21 12:59:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-21 12:59:50,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:59:50,832 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] [2020-07-21 12:59:51,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:51,046 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:59:51,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:59:51,046 INFO L82 PathProgramCache]: Analyzing trace with hash 646393945, now seen corresponding path program 3 times [2020-07-21 12:59:51,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:59:51,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708287796] [2020-07-21 12:59:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:51,104 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:59:51,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:59:51,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 12:59:51,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:59:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 52 proven. 5 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-07-21 12:59:51,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:59:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 52 proven. 5 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-07-21 12:59:52,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708287796] [2020-07-21 12:59:52,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 12:59:52,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-21 12:59:52,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148136716] [2020-07-21 12:59:52,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 12:59:52,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 12:59:52,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 12:59:52,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 12:59:52,121 INFO L87 Difference]: Start difference. First operand 64 states and 105 transitions. Second operand 7 states. [2020-07-21 12:59:52,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 12:59:52,405 INFO L93 Difference]: Finished difference Result 96 states and 148 transitions. [2020-07-21 12:59:52,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 12:59:52,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-07-21 12:59:52,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 12:59:52,413 INFO L225 Difference]: With dead ends: 96 [2020-07-21 12:59:52,414 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 12:59:52,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 119 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-07-21 12:59:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 12:59:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-07-21 12:59:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 12:59:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2020-07-21 12:59:52,426 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 64 [2020-07-21 12:59:52,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 12:59:52,427 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2020-07-21 12:59:52,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 12:59:52,427 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2020-07-21 12:59:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-21 12:59:52,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 12:59:52,428 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] [2020-07-21 12:59:52,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:52,641 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 12:59:52,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 12:59:52,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1124697265, now seen corresponding path program 8 times [2020-07-21 12:59:52,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 12:59:52,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643906842] [2020-07-21 12:59:52,643 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 12:59:52,710 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 12:59:52,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 12:59:52,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 105 conjunts are in the unsatisfiable core [2020-07-21 12:59:52,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 12:59:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 37 proven. 104 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-07-21 12:59:54,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 12:59:57,127 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:59:59,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 12:59:59,209 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:59:59,210 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 12:59:59,210 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:00:01,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:01,045 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:00:01,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:02,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:02,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:02,735 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:00:04,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:04,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:00:05,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:05,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:00:06,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:06,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:06,468 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:00:06,469 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:00:08,708 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 13:00:08,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:08,713 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:08,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:00:08,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:08,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:08,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:08,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:08,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:08,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:10,737 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (< |c_mult_#in~m| 1))) (and (forall ((v_mult_~n_BEFORE_CALL_66 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_66 (- 1)))) (let ((.cse0 (div .cse1 (- 6)))) (or (< .cse0 (+ (div (+ .cse1 (* |c_mult_#res| (- 1))) (- 6)) 1)) (<= 3 (div (+ .cse1 (- 1)) (- 6))) (< .cse0 1))))) (or .cse2 (forall ((v_mult_~n_BEFORE_CALL_66 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_66 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3))) .cse2 (forall ((v_mult_~n_BEFORE_CALL_66 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_66 (- 1)))) (or (<= 3 (div (+ .cse3 (- 1)) (- 6))) (< (div .cse3 (- 6)) 1) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3)))))) is different from false [2020-07-21 13:00:12,787 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or .cse0 (forall ((v_prenex_5 Int)) (< (div (+ (* v_prenex_5 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3))) (forall ((v_mult_~n_BEFORE_CALL_66 Int)) (let ((.cse2 (* v_mult_~n_BEFORE_CALL_66 (- 1)))) (let ((.cse1 (div .cse2 (- 6)))) (or (< .cse1 (+ (div (+ .cse2 (* |c_mult_#res| (- 1))) (- 6)) 1)) (<= 3 (div (+ .cse2 (- 1)) (- 6))) (< .cse1 1))))) (forall ((v_prenex_6 Int)) (let ((.cse3 (* v_prenex_6 (- 1)))) (or (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 6)) 3) (< (div .cse3 (- 6)) 1) (<= 3 (div (+ .cse3 (- 1)) (- 6)))))) .cse0)) is different from false [2020-07-21 13:00:13,147 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 165 refuted. 0 times theorem prover too weak. 36 trivial. 16 not checked. [2020-07-21 13:00:13,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643906842] [2020-07-21 13:00:13,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:00:13,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 32] total 55 [2020-07-21 13:00:13,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335378597] [2020-07-21 13:00:13,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-21 13:00:13,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:13,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-21 13:00:13,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2592, Unknown=2, NotChecked=206, Total=2970 [2020-07-21 13:00:13,151 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 55 states. [2020-07-21 13:00:15,840 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 49 DAG size of output: 11 [2020-07-21 13:00:18,287 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 13:00:18,739 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:00:22,800 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 13:00:24,768 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 13:00:26,189 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-21 13:00:26,651 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 14 [2020-07-21 13:00:27,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:27,707 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2020-07-21 13:00:27,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 13:00:27,716 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 72 [2020-07-21 13:00:27,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:27,718 INFO L225 Difference]: With dead ends: 82 [2020-07-21 13:00:27,718 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 13:00:27,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=517, Invalid=5189, Unknown=2, NotChecked=298, Total=6006 [2020-07-21 13:00:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 13:00:27,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2020-07-21 13:00:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 13:00:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2020-07-21 13:00:27,731 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 72 [2020-07-21 13:00:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:27,731 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2020-07-21 13:00:27,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-21 13:00:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2020-07-21 13:00:27,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 13:00:27,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:27,732 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] [2020-07-21 13:00:27,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:27,947 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:27,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:27,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1394734426, now seen corresponding path program 9 times [2020-07-21 13:00:27,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:27,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629133238] [2020-07-21 13:00:27,949 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:28,013 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:28,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:28,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 97 conjunts are in the unsatisfiable core [2020-07-21 13:00:28,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 4 proven. 83 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-07-21 13:00:29,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:00:30,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:30,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:31,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:31,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:31,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:34,225 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:00:34,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:35,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:36,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:36,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:36,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:36,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 118 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-07-21 13:00:36,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629133238] [2020-07-21 13:00:36,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:00:36,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 31 [2020-07-21 13:00:36,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812879806] [2020-07-21 13:00:36,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 13:00:36,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:00:36,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 13:00:36,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2020-07-21 13:00:36,382 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand 31 states. [2020-07-21 13:00:39,334 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:00:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:00:42,897 INFO L93 Difference]: Finished difference Result 85 states and 114 transitions. [2020-07-21 13:00:42,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-21 13:00:42,903 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2020-07-21 13:00:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:00:42,906 INFO L225 Difference]: With dead ends: 85 [2020-07-21 13:00:42,906 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 13:00:42,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=337, Invalid=2419, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 13:00:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 13:00:42,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2020-07-21 13:00:42,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-21 13:00:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 77 transitions. [2020-07-21 13:00:42,917 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 77 transitions. Word has length 65 [2020-07-21 13:00:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:00:42,918 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 77 transitions. [2020-07-21 13:00:42,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 13:00:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 77 transitions. [2020-07-21 13:00:42,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-21 13:00:42,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:00:42,919 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:00:43,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:43,128 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:00:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:00:43,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1266374702, now seen corresponding path program 10 times [2020-07-21 13:00:43,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:00:43,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062707310] [2020-07-21 13:00:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:00:43,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:00:43,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:00:43,205 WARN L261 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 117 conjunts are in the unsatisfiable core [2020-07-21 13:00:43,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:00:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 42 proven. 131 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-07-21 13:00:45,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:00:47,055 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:00:48,546 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:00:50,376 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:00:51,102 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:00:51,103 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:00:53,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:53,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:53,399 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:00:55,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:55,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:55,455 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:00:57,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:57,286 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:00:57,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:58,876 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:00:58,877 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:00:58,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:00,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:00,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:00,254 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:01:01,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:01,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:01,461 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:01:01,462 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:01:03,067 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:01:04,120 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 13:01:04,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:04,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:04,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:01:04,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:04,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:04,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:01:04,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:04,130 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:04,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:01:06,172 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or .cse0 (forall ((v_mult_~n_BEFORE_CALL_94 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_94 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 7)) 3))) .cse0 (forall ((v_mult_~n_BEFORE_CALL_94 Int)) (let ((.cse2 (* v_mult_~n_BEFORE_CALL_94 (- 1)))) (let ((.cse1 (div .cse2 (- 7)))) (or (< .cse1 (+ (div (+ .cse2 (* |c_mult_#res| (- 1))) (- 7)) 1)) (<= 3 (div (+ .cse2 (- 1)) (- 7))) (< .cse1 1))))) (forall ((v_mult_~n_BEFORE_CALL_94 Int)) (let ((.cse3 (* v_mult_~n_BEFORE_CALL_94 (- 1)))) (or (<= 3 (div (+ .cse3 (- 1)) (- 7))) (< (div .cse3 (- 7)) 1) (< (div (+ .cse3 (* |c_mult_#res| (- 1)) (- 1)) (- 7)) 3)))))) is different from false [2020-07-21 13:01:08,196 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or .cse0 (forall ((v_mult_~n_BEFORE_CALL_94 Int)) (< (div (+ (* v_mult_~n_BEFORE_CALL_94 (- 1)) (* |c_mult_#res| (- 1)) (- 1)) (- 7)) 3))) .cse0 (forall ((v_prenex_8 Int)) (let ((.cse1 (* v_prenex_8 (- 1)))) (or (< (div .cse1 (- 7)) 1) (< (div (+ .cse1 (* |c_mult_#res| (- 1)) (- 1)) (- 7)) 3) (<= 3 (div (+ .cse1 (- 1)) (- 7)))))) (forall ((v_prenex_7 Int)) (let ((.cse3 (* v_prenex_7 (- 1)))) (let ((.cse2 (div .cse3 (- 7)))) (or (< .cse2 (+ (div (+ .cse3 (* |c_mult_#res| (- 1))) (- 7)) 1)) (<= 3 (div (+ .cse3 (- 1)) (- 7))) (< .cse2 1))))))) is different from false [2020-07-21 13:01:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 5 proven. 213 refuted. 0 times theorem prover too weak. 45 trivial. 18 not checked. [2020-07-21 13:01:08,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062707310] [2020-07-21 13:01:08,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:01:08,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 35] total 60 [2020-07-21 13:01:08,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582436046] [2020-07-21 13:01:08,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-21 13:01:08,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:01:08,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-21 13:01:08,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3128, Unknown=2, NotChecked=226, Total=3540 [2020-07-21 13:01:08,605 INFO L87 Difference]: Start difference. First operand 58 states and 77 transitions. Second operand 60 states. [2020-07-21 13:01:52,606 WARN L193 SmtUtils]: Spent 43.29 s on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-07-21 13:02:37,525 WARN L193 SmtUtils]: Spent 42.53 s on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-07-21 13:02:41,130 WARN L193 SmtUtils]: Spent 689.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-07-21 13:02:44,179 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 13:02:45,076 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:02:55,580 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 13:02:57,881 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-21 13:02:58,731 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 14 [2020-07-21 13:03:01,146 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 13:03:02,553 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 13:03:03,146 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 13:03:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:03:03,553 INFO L93 Difference]: Finished difference Result 85 states and 110 transitions. [2020-07-21 13:03:03,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 13:03:03,568 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 79 [2020-07-21 13:03:03,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:03:03,569 INFO L225 Difference]: With dead ends: 85 [2020-07-21 13:03:03,570 INFO L226 Difference]: Without dead ends: 76 [2020-07-21 13:03:03,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 115.0s TimeCoverageRelationStatistics Valid=575, Invalid=6236, Unknown=3, NotChecked=326, Total=7140 [2020-07-21 13:03:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-07-21 13:03:03,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2020-07-21 13:03:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 13:03:03,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2020-07-21 13:03:03,581 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 79 [2020-07-21 13:03:03,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:03:03,582 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2020-07-21 13:03:03,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-21 13:03:03,582 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2020-07-21 13:03:03,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-07-21 13:03:03,583 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:03:03,583 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] [2020-07-21 13:03:03,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:03:03,797 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:03:03,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:03:03,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1525719705, now seen corresponding path program 11 times [2020-07-21 13:03:03,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:03:03,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512324714] [2020-07-21 13:03:03,799 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:03:03,884 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:03:03,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:03:03,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 133 conjunts are in the unsatisfiable core [2020-07-21 13:03:03,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:03:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 8 proven. 160 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2020-07-21 13:03:06,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:03:07,370 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:07,546 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:07,656 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:07,823 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:03:08,008 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:08,124 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:08,293 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:08,478 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:08,592 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:08,760 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:08,945 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:03:09,052 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:03:09,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:10,057 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:10,234 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:10,344 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:10,513 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:03:10,700 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:10,815 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:10,984 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:11,171 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:11,290 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:11,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:11,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:11,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:12,345 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:12,522 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:12,633 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:12,801 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:03:12,988 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:13,110 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:13,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:13,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:13,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:14,261 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:14,443 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:14,553 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:14,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:14,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:14,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:15,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:15,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:15,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:17,124 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:17,301 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:17,412 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:17,585 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:03:17,772 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:17,887 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:18,055 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:18,242 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:18,358 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:18,526 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:18,713 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:18,828 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:18,996 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:19,174 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:03:19,281 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:03:20,516 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:20,693 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:20,803 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:20,971 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:03:21,156 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:21,271 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:21,439 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:21,632 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:21,748 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:21,941 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:22,127 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:22,243 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:22,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:23,147 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-21 13:03:24,109 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:24,286 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:24,396 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:24,564 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:03:24,750 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:24,866 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:25,033 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:25,220 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:25,335 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:27,903 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:27,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:27,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:03:27,910 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:03:29,148 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:29,325 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:29,435 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:29,603 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:03:29,788 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:29,904 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:30,479 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2020-07-21 13:03:30,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512324714] [2020-07-21 13:03:30,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:03:30,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-21 13:03:30,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195569643] [2020-07-21 13:03:30,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:03:30,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:03:30,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:03:30,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1508, Unknown=1, NotChecked=0, Total=1640 [2020-07-21 13:03:30,486 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand 19 states. [2020-07-21 13:03:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:03:37,165 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2020-07-21 13:03:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 13:03:37,165 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-07-21 13:03:37,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:03:37,166 INFO L225 Difference]: With dead ends: 73 [2020-07-21 13:03:37,166 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 13:03:37,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=305, Invalid=2556, Unknown=1, NotChecked=0, Total=2862 [2020-07-21 13:03:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 13:03:37,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-07-21 13:03:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 13:03:37,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 90 transitions. [2020-07-21 13:03:37,176 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 90 transitions. Word has length 86 [2020-07-21 13:03:37,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:03:37,177 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 90 transitions. [2020-07-21 13:03:37,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:03:37,177 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 90 transitions. [2020-07-21 13:03:37,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-21 13:03:37,178 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:03:37,179 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] [2020-07-21 13:03:37,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:03:37,388 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:03:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:03:37,388 INFO L82 PathProgramCache]: Analyzing trace with hash -330893523, now seen corresponding path program 12 times [2020-07-21 13:03:37,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:03:37,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7008975] [2020-07-21 13:03:37,389 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:03:37,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:03:37,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:03:37,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-21 13:03:37,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:03:41,819 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 16 proven. 307 refuted. 0 times theorem prover too weak. 358 trivial. 0 not checked. [2020-07-21 13:03:41,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:03:42,807 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:42,984 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:43,096 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:43,264 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:03:43,449 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:43,564 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:43,732 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:43,918 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:44,034 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:44,216 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:44,404 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:44,520 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:44,690 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:44,878 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:44,992 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:45,159 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:45,343 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:45,458 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:45,625 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:45,810 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:45,924 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:46,090 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:46,269 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:03:46,377 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:03:46,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:47,532 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:47,709 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:47,820 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:47,987 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:03:48,174 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:48,288 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:48,457 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:48,645 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:48,760 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:48,929 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:49,116 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:49,231 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:49,406 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:49,593 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:49,708 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:49,876 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:50,062 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:50,177 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:50,344 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:50,530 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:50,646 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:51,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:51,818 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:51,995 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:52,104 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:52,271 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:03:52,458 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:52,574 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:52,742 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:52,928 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:53,046 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:53,215 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:53,401 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:53,516 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:53,684 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:53,870 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:53,986 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:54,159 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:54,345 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:54,460 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:54,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:55,830 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:56,008 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:56,118 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:56,285 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:03:56,470 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:56,585 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:56,752 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:56,939 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:57,054 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:57,230 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:57,419 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:57,536 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:57,703 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:03:57,888 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:58,003 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:03:58,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:58,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:58,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:03:59,357 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:03:59,536 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:59,647 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:03:59,815 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:04:00,002 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:00,117 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:00,285 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:00,476 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:00,591 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:00,758 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:00,944 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:01,060 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:01,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:02,310 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:04:02,492 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:02,605 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:02,772 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:04:02,958 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:03,072 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:03,240 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:03,425 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:03,544 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:04,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:04,808 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:04:04,985 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:05,095 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:05,262 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:04:05,449 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:05,564 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:06,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:06,938 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:04:07,114 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:07,224 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:07,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:08,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:08,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:08,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:10,399 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:04:10,575 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:10,686 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:10,854 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:04:11,039 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:11,154 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:11,323 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:11,510 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:11,625 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:11,794 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:11,981 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:12,097 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:12,265 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:12,443 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:04:12,549 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:04:14,092 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:04:14,269 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:14,379 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:14,547 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:04:14,734 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:14,850 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:15,019 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:15,208 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:15,326 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:15,495 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:15,682 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:15,797 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:16,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:18,021 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:04:18,198 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:18,308 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:18,476 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:04:18,662 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:18,776 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:18,944 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:19,131 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:19,251 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:19,946 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 13:04:19,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:19,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:04:19,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:04:21,381 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:04:21,558 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:21,669 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:21,836 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:04:22,027 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:22,143 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:22,870 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 13:04:22,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7008975] [2020-07-21 13:04:22,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:04:22,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-21 13:04:22,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657224028] [2020-07-21 13:04:22,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 13:04:22,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:04:22,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 13:04:22,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2787, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 13:04:22,876 INFO L87 Difference]: Start difference. First operand 65 states and 90 transitions. Second operand 25 states. [2020-07-21 13:04:34,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:04:34,877 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2020-07-21 13:04:34,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-21 13:04:34,895 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 114 [2020-07-21 13:04:34,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:04:34,896 INFO L225 Difference]: With dead ends: 76 [2020-07-21 13:04:34,896 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 13:04:34,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 135 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=513, Invalid=4889, Unknown=0, NotChecked=0, Total=5402 [2020-07-21 13:04:34,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 13:04:34,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-07-21 13:04:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-21 13:04:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2020-07-21 13:04:34,909 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 114 [2020-07-21 13:04:34,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:04:34,909 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2020-07-21 13:04:34,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 13:04:34,910 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2020-07-21 13:04:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-21 13:04:34,911 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:04:34,911 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] [2020-07-21 13:04:35,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:04:35,126 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:04:35,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:04:35,126 INFO L82 PathProgramCache]: Analyzing trace with hash 365189506, now seen corresponding path program 13 times [2020-07-21 13:04:35,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:04:35,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112300807] [2020-07-21 13:04:35,127 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:04:35,235 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:04:35,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:04:35,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-21 13:04:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:04:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2020-07-21 13:04:39,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:04:40,414 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:04:40,592 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:40,703 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:40,872 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:04:41,060 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:41,176 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:41,344 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:41,532 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:41,648 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:41,818 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:42,003 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:42,118 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:42,289 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:42,480 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:42,595 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:42,763 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:42,950 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:43,065 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:43,234 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:43,421 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:43,540 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:43,710 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:43,890 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:04:43,999 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:04:44,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:45,155 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:04:45,334 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:45,448 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:45,615 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:04:45,802 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:45,918 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:46,087 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:46,273 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:46,389 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:46,557 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:46,744 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:46,859 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:47,029 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:47,215 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:47,335 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:47,504 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:47,691 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:47,806 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:47,975 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:48,168 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:48,284 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:48,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:48,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:48,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:49,461 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:04:49,640 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:49,756 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:49,924 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:04:50,111 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:50,227 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:50,397 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:50,596 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:50,712 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:50,882 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:51,071 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:51,187 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:51,356 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:51,543 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:51,659 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:51,827 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:52,014 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:52,134 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:52,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:53,516 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:04:53,695 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:53,808 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:53,977 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:04:54,164 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:54,281 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:54,455 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:54,643 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:54,758 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:54,927 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:55,115 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:55,231 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:55,401 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:55,589 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:55,707 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:56,204 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:57,121 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:04:57,300 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:57,411 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:04:57,578 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:04:57,765 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:57,881 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:58,051 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:58,239 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:58,355 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:58,523 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:04:58,710 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:58,826 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:04:59,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:59,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:04:59,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:00,086 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:00,265 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:00,376 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:00,544 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:05:00,731 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:00,847 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:01,016 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:05:01,204 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:01,320 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:01,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:01,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:01,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:02,632 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:02,814 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:02,933 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:03,122 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:05:03,318 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:03,437 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:03,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:04,855 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:05,047 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:05,164 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:05,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:05,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:05,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:06,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:08,415 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:08,594 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:08,705 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:08,880 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:05:09,060 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:05:09,180 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:05:10,741 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:10,921 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:11,033 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:11,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:12,248 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:05:12,887 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:13,863 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:13,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:13,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:13,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 35 proven. 315 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-07-21 13:05:14,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112300807] [2020-07-21 13:05:14,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:05:14,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 38] total 52 [2020-07-21 13:05:14,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461103905] [2020-07-21 13:05:14,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-21 13:05:14,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:05:14,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-21 13:05:14,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2483, Unknown=0, NotChecked=0, Total=2652 [2020-07-21 13:05:14,028 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand 52 states. [2020-07-21 13:05:20,611 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:21,816 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 13:05:29,044 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 13:05:31,000 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:05:32,790 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:33,592 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 13:05:36,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:05:36,646 INFO L93 Difference]: Finished difference Result 90 states and 125 transitions. [2020-07-21 13:05:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-07-21 13:05:36,646 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 93 [2020-07-21 13:05:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:05:36,647 INFO L225 Difference]: With dead ends: 90 [2020-07-21 13:05:36,647 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 13:05:36,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=592, Invalid=5570, Unknown=0, NotChecked=0, Total=6162 [2020-07-21 13:05:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 13:05:36,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 59. [2020-07-21 13:05:36,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-21 13:05:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 81 transitions. [2020-07-21 13:05:36,656 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 81 transitions. Word has length 93 [2020-07-21 13:05:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:05:36,657 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 81 transitions. [2020-07-21 13:05:36,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-21 13:05:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 81 transitions. [2020-07-21 13:05:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-21 13:05:36,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:05:36,659 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] [2020-07-21 13:05:36,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:05:36,874 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:05:36,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:05:36,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1343946330, now seen corresponding path program 14 times [2020-07-21 13:05:36,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:05:36,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677993430] [2020-07-21 13:05:36,875 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:05:36,998 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:05:36,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:05:37,002 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 145 conjunts are in the unsatisfiable core [2020-07-21 13:05:37,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:05:40,266 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 8 proven. 195 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-07-21 13:05:40,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:05:41,170 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:41,349 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:41,461 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:41,630 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:05:41,817 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:41,934 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:42,104 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:05:42,298 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:42,415 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:42,585 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:05:42,765 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:05:42,875 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:05:43,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:43,942 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:44,120 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:44,237 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:44,406 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:05:44,595 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:44,714 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:44,885 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:05:45,077 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:45,195 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:45,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:46,306 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:46,486 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:46,598 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:46,768 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:05:46,957 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:47,075 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:47,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:48,375 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:48,580 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:48,721 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:49,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:50,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:50,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:50,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:51,455 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:51,635 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:51,747 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:51,922 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:05:52,111 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:52,227 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:52,397 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:05:52,586 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:52,703 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:52,873 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:05:53,061 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:53,178 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:53,348 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:05:53,535 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:53,656 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:53,825 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:05:54,005 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:05:54,114 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:05:55,421 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:55,605 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:55,718 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:55,887 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:05:56,076 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:56,193 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:56,363 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:05:56,551 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:56,668 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:56,838 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:05:57,027 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:57,143 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:57,319 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:05:57,509 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:57,625 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:05:58,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:05:58,600 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 13:05:59,120 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:59,442 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 13:05:59,603 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:05:59,809 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:05:59,937 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:00,124 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:06:00,315 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:00,432 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:00,603 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:00,792 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:00,908 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:01,079 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:01,271 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:01,387 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:01,959 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:06:01,964 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:01,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:01,973 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:06:02,648 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2020-07-21 13:06:03,725 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:06:03,905 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:04,016 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:04,187 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:06:04,375 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:04,492 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:04,663 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:04,853 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:04,969 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:05,581 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-21 13:06:05,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677993430] [2020-07-21 13:06:05,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:06:05,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-21 13:06:05,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038235365] [2020-07-21 13:06:05,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:06:05,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:06:05,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:06:05,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1670, Unknown=0, NotChecked=0, Total=1806 [2020-07-21 13:06:05,587 INFO L87 Difference]: Start difference. First operand 59 states and 81 transitions. Second operand 21 states. [2020-07-21 13:06:13,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:06:13,921 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2020-07-21 13:06:13,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-21 13:06:13,939 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2020-07-21 13:06:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:06:13,940 INFO L225 Difference]: With dead ends: 67 [2020-07-21 13:06:13,941 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 13:06:13,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=338, Invalid=2968, Unknown=0, NotChecked=0, Total=3306 [2020-07-21 13:06:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 13:06:13,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2020-07-21 13:06:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-21 13:06:13,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2020-07-21 13:06:13,948 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 93 [2020-07-21 13:06:13,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:06:13,948 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2020-07-21 13:06:13,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:06:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2020-07-21 13:06:13,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-21 13:06:13,950 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:06:13,950 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] [2020-07-21 13:06:14,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:06:14,164 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:06:14,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:06:14,165 INFO L82 PathProgramCache]: Analyzing trace with hash 183807880, now seen corresponding path program 15 times [2020-07-21 13:06:14,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:06:14,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005615789] [2020-07-21 13:06:14,165 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:06:14,292 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:06:14,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:06:14,297 WARN L261 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 141 conjunts are in the unsatisfiable core [2020-07-21 13:06:14,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:06:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 52 proven. 194 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 13:06:20,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:06:21,595 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:06:21,776 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:21,889 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:22,064 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:06:22,254 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:22,373 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:22,545 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:22,736 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:22,854 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:23,024 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:23,214 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:23,333 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:23,504 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:23,695 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:23,816 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:23,988 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:24,178 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:24,295 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:24,468 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:24,658 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:24,775 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:24,946 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:25,135 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:25,252 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:25,423 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:25,610 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:06:25,720 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:06:26,261 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:06:26,824 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2020-07-21 13:06:27,736 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:06:27,917 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:28,030 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:28,199 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:06:28,388 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:28,504 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:28,675 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:28,863 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:28,980 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:29,151 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:29,339 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:29,460 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:29,630 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:29,819 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:29,937 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:30,109 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:30,303 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:30,420 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:30,594 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:30,785 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:30,902 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:31,080 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:31,271 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:31,389 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:31,953 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 13:06:31,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:31,959 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:06:31,959 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:06:31,960 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:06:33,419 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:06:33,600 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:33,713 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:33,884 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:06:34,078 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:34,197 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:34,371 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:34,565 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:34,683 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:34,856 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:35,052 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:35,170 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:35,342 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:35,532 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:35,650 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:35,822 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:36,013 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:36,132 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:36,305 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:36,496 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:36,615 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:37,204 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 13:06:37,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:37,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:37,210 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:06:38,706 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:06:38,893 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:39,006 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:39,178 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:06:39,368 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:39,485 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:39,659 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:39,851 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:39,969 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:40,143 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:40,333 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:40,452 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:40,629 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:40,821 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:40,939 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:41,110 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:41,303 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:41,421 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:42,027 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 13:06:42,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:42,033 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:06:42,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:43,575 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:06:43,757 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:43,870 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:44,044 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:06:44,235 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:44,352 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:44,529 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:44,720 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:44,838 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:45,010 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:45,201 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:45,318 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:45,495 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:45,686 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:45,804 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:46,438 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 13:06:46,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:46,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:06:48,020 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:06:48,201 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:48,314 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:48,488 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:06:48,678 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:48,795 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:48,967 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:49,157 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:49,275 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:49,447 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:49,637 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:49,755 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:50,408 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 13:06:50,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:50,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:50,415 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:06:52,059 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:06:52,239 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:52,355 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:52,526 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:06:52,715 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:52,832 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:53,003 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:06:53,194 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:53,310 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:53,986 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 13:06:53,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:53,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:06:55,666 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:06:55,846 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:55,958 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:56,129 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:06:56,321 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:56,438 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:06:57,138 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 13:06:57,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:57,143 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts [2020-07-21 13:06:57,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:58,853 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:06:59,037 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:59,151 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:06:59,873 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-07-21 13:06:59,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:06:59,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:07:02,188 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 13:07:02,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:07:02,193 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:07:02,193 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:07:02,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:07:04,092 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:07:04,319 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 13:07:04,452 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 13:07:05,307 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:07:06,179 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 13:07:07,371 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 13:07:07,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:07:07,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:07:07,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:07:07,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:07:07,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:07:07,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:07:07,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:07:07,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:07:07,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:07:07,380 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:07:09,404 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or (forall ((v_mult_~n_BEFORE_CALL_188 Int)) (< (div (+ (* |c_mult_#res| (- 1)) (* v_mult_~n_BEFORE_CALL_188 (- 1)) (- 1)) (- 9)) 3)) .cse0) .cse0 (forall ((v_mult_~n_BEFORE_CALL_188 Int)) (let ((.cse1 (* v_mult_~n_BEFORE_CALL_188 (- 1)))) (or (<= 3 (div (+ .cse1 (- 1)) (- 9))) (< (div .cse1 (- 9)) 1) (< (div (+ (* |c_mult_#res| (- 1)) .cse1 (- 1)) (- 9)) 3)))) (forall ((v_mult_~n_BEFORE_CALL_188 Int)) (let ((.cse2 (* v_mult_~n_BEFORE_CALL_188 (- 1)))) (let ((.cse3 (div .cse2 (- 9)))) (or (<= 3 (div (+ .cse2 (- 1)) (- 9))) (< .cse3 1) (< .cse3 (+ (div (+ (* |c_mult_#res| (- 1)) .cse2) (- 9)) 1)))))))) is different from false [2020-07-21 13:07:11,433 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (< |c_mult_#in~m| 1))) (and (or (forall ((v_mult_~n_BEFORE_CALL_188 Int)) (< (div (+ (* |c_mult_#res| (- 1)) (* v_mult_~n_BEFORE_CALL_188 (- 1)) (- 1)) (- 9)) 3)) .cse0) (forall ((v_prenex_9 Int)) (let ((.cse1 (* v_prenex_9 (- 1)))) (or (< (div (+ (* |c_mult_#res| (- 1)) .cse1 (- 1)) (- 9)) 3) (< (div .cse1 (- 9)) 1) (<= 3 (div (+ .cse1 (- 1)) (- 9)))))) .cse0 (forall ((v_prenex_10 Int)) (let ((.cse2 (* v_prenex_10 (- 1)))) (let ((.cse3 (div .cse2 (- 9)))) (or (<= 3 (div (+ .cse2 (- 1)) (- 9))) (< .cse3 (+ (div (+ .cse2 (* |c_mult_#res| (- 1))) (- 9)) 1)) (< .cse3 1))))))) is different from false [2020-07-21 13:07:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 5 proven. 327 refuted. 0 times theorem prover too weak. 66 trivial. 22 not checked. [2020-07-21 13:07:12,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005615789] [2020-07-21 13:07:12,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:07:12,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 41] total 70 [2020-07-21 13:07:12,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477934577] [2020-07-21 13:07:12,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-07-21 13:07:12,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:07:12,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-07-21 13:07:12,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=4350, Unknown=2, NotChecked=266, Total=4830 [2020-07-21 13:07:12,227 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand 70 states. [2020-07-21 13:07:15,808 WARN L193 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 49 DAG size of output: 11 [2020-07-21 13:07:21,406 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 13:07:22,391 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:07:36,535 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 13:07:39,219 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 15 [2020-07-21 13:07:40,446 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 14 [2020-07-21 13:07:45,145 WARN L193 SmtUtils]: Spent 455.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 13:07:46,633 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 13:07:47,401 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 13:07:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:07:47,843 INFO L93 Difference]: Finished difference Result 93 states and 125 transitions. [2020-07-21 13:07:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-21 13:07:47,859 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 93 [2020-07-21 13:07:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:07:47,862 INFO L225 Difference]: With dead ends: 93 [2020-07-21 13:07:47,862 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 13:07:47,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=730, Invalid=8588, Unknown=2, NotChecked=382, Total=9702 [2020-07-21 13:07:47,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 13:07:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2020-07-21 13:07:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 13:07:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 101 transitions. [2020-07-21 13:07:47,874 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 101 transitions. Word has length 93 [2020-07-21 13:07:47,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:07:47,874 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 101 transitions. [2020-07-21 13:07:47,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-07-21 13:07:47,875 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 101 transitions. [2020-07-21 13:07:47,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-07-21 13:07:47,876 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:07:47,876 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] [2020-07-21 13:07:48,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:07:48,086 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:07:48,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:07:48,087 INFO L82 PathProgramCache]: Analyzing trace with hash -192564829, now seen corresponding path program 16 times [2020-07-21 13:07:48,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:07:48,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051105395] [2020-07-21 13:07:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:07:48,237 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:07:48,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:07:48,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 157 conjunts are in the unsatisfiable core [2020-07-21 13:07:48,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:07:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 8 proven. 233 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2020-07-21 13:07:52,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:07:53,129 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:07:53,321 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:07:53,438 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:07:53,615 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:07:53,811 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:07:53,933 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:07:54,110 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:07:54,305 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:07:54,427 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:07:54,605 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:07:54,793 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:07:54,906 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:07:55,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:07:56,071 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:07:56,258 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:07:56,374 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:07:56,549 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:07:56,744 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:07:56,865 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:07:57,046 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:07:57,241 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:07:57,363 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:07:57,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:07:58,558 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:07:58,744 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:07:58,866 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:07:59,041 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:07:59,237 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:07:59,357 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:07:59,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:07:59,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:07:59,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:08:00,662 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:08:00,848 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:00,963 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:01,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:08:02,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:08:03,907 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:08:04,094 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:04,210 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:04,384 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:08:04,584 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:04,704 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:04,878 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:05,073 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:05,194 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:05,371 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:05,566 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:05,687 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:05,863 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:06,058 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:06,183 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:06,359 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:06,554 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:06,674 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:06,851 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:07,037 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:08:07,150 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:08:08,576 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:08:08,766 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:08,884 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:09,063 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:08:09,260 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:09,382 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:09,560 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:09,757 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:09,883 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:10,060 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:10,256 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:10,376 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:10,554 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:10,750 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:10,870 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:11,048 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:11,243 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:11,364 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:11,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:08:14,450 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:15,015 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:15,449 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:08:15,641 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:15,758 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:15,934 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:08:16,131 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:16,253 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:16,430 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:16,627 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:16,748 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:16,925 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:17,121 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:17,243 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:17,424 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:17,619 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:17,740 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:20,390 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2020-07-21 13:08:20,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:08:20,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:08:20,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:08:21,822 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:08:22,009 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:22,126 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:22,302 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:08:22,498 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:22,620 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:22,800 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:22,999 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:23,120 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:23,297 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:23,494 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:23,617 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:24,370 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 13:08:24,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051105395] [2020-07-21 13:08:24,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:08:24,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-21 13:08:24,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249913225] [2020-07-21 13:08:24,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 13:08:24,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:08:24,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 13:08:24,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1840, Unknown=2, NotChecked=0, Total=1980 [2020-07-21 13:08:24,376 INFO L87 Difference]: Start difference. First operand 71 states and 101 transitions. Second operand 23 states. [2020-07-21 13:08:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:08:39,330 INFO L93 Difference]: Finished difference Result 79 states and 107 transitions. [2020-07-21 13:08:39,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 13:08:39,349 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 100 [2020-07-21 13:08:39,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:08:39,350 INFO L225 Difference]: With dead ends: 79 [2020-07-21 13:08:39,350 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 13:08:39,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=366, Invalid=3412, Unknown=4, NotChecked=0, Total=3782 [2020-07-21 13:08:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 13:08:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2020-07-21 13:08:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 13:08:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2020-07-21 13:08:39,363 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 100 [2020-07-21 13:08:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:08:39,363 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2020-07-21 13:08:39,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 13:08:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2020-07-21 13:08:39,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-21 13:08:39,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:08:39,365 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] [2020-07-21 13:08:39,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:08:39,579 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:08:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:08:39,580 INFO L82 PathProgramCache]: Analyzing trace with hash -547887379, now seen corresponding path program 17 times [2020-07-21 13:08:39,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:08:39,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845611194] [2020-07-21 13:08:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:08:39,740 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:08:39,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:08:39,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 181 conjunts are in the unsatisfiable core [2020-07-21 13:08:39,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:08:43,561 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 12 proven. 308 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-07-21 13:08:43,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:08:44,564 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:08:44,751 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:44,869 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:45,046 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:08:45,243 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:45,366 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:45,545 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:45,746 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:45,868 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:46,047 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:46,243 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:46,365 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:46,543 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:46,741 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:46,863 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:47,041 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:47,231 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:08:47,350 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:08:47,770 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:08:48,517 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:08:48,704 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:48,821 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:48,997 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:08:49,199 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:49,323 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:49,501 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:49,699 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:49,821 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:49,999 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:50,195 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:50,317 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:50,495 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:50,692 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:50,819 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:51,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:08:51,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:08:51,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:08:52,210 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:08:52,399 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:52,515 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:52,695 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:08:52,890 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:53,011 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:53,188 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:53,382 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:53,503 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:53,680 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:53,876 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:53,997 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:54,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:08:55,228 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:08:55,414 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:55,530 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:55,707 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:08:55,901 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:56,022 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:56,202 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:08:56,397 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:56,517 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:56,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:08:57,755 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:08:57,945 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:58,062 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:08:58,237 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:08:58,433 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:58,553 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:08:59,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:08:59,902 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:09:00,088 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:00,205 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:00,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:09:01,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:09:01,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:09:01,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:09:03,270 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:09:03,461 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:03,578 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:03,754 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:09:03,951 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:04,072 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:04,249 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:04,445 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:04,566 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:04,746 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:04,942 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:05,067 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:05,243 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:05,439 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:05,560 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:05,738 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:05,934 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:06,055 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:06,232 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:06,419 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:09:06,532 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:09:08,025 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:09:08,212 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:08,328 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:08,504 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:09:08,705 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:08,826 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:09,003 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:09,199 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:09,320 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:09,497 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:09,693 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:09,816 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:09,993 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:10,188 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:10,314 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:10,491 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:10,687 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:10,808 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:11,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:09:11,963 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:12,787 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 13:09:13,223 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:09:13,409 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:13,526 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:13,702 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:09:13,898 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:14,019 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:14,201 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:14,398 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:14,519 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:14,696 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:14,895 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:15,018 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:15,194 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:15,395 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:15,516 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:16,263 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 13:09:16,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:09:16,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:09:16,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:09:17,751 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:09:17,937 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:18,055 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:18,231 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:09:18,428 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:18,549 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:18,726 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:18,922 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:19,044 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:19,222 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:19,422 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:19,543 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:20,247 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 13:09:20,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845611194] [2020-07-21 13:09:20,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:09:20,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-21 13:09:20,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208759207] [2020-07-21 13:09:20,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 13:09:20,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:09:20,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 13:09:20,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2192, Unknown=0, NotChecked=0, Total=2352 [2020-07-21 13:09:20,254 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand 23 states. [2020-07-21 13:09:30,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:09:30,999 INFO L93 Difference]: Finished difference Result 79 states and 106 transitions. [2020-07-21 13:09:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-21 13:09:31,019 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 114 [2020-07-21 13:09:31,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:09:31,020 INFO L225 Difference]: With dead ends: 79 [2020-07-21 13:09:31,020 INFO L226 Difference]: Without dead ends: 75 [2020-07-21 13:09:31,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=422, Invalid=3868, Unknown=0, NotChecked=0, Total=4290 [2020-07-21 13:09:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-21 13:09:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-07-21 13:09:31,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 13:09:31,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 96 transitions. [2020-07-21 13:09:31,028 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 96 transitions. Word has length 114 [2020-07-21 13:09:31,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:09:31,029 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 96 transitions. [2020-07-21 13:09:31,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 13:09:31,033 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 96 transitions. [2020-07-21 13:09:31,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-21 13:09:31,033 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:09:31,034 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] [2020-07-21 13:09:31,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:09:31,235 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:09:31,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:09:31,236 INFO L82 PathProgramCache]: Analyzing trace with hash -445760116, now seen corresponding path program 18 times [2020-07-21 13:09:31,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:09:31,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252134303] [2020-07-21 13:09:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:09:31,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:09:31,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:09:31,404 WARN L261 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 169 conjunts are in the unsatisfiable core [2020-07-21 13:09:31,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:09:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 20 proven. 268 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-21 13:09:37,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:09:38,219 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:09:38,406 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:38,525 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:38,701 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:09:38,897 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:39,018 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:39,196 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:39,395 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:39,517 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:39,694 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:39,890 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:40,011 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:40,189 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:40,384 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:40,508 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:40,686 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:40,886 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:41,007 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:41,185 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:41,382 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:41,503 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:41,681 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:41,878 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:42,001 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:42,179 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:42,375 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:42,503 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:42,680 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:42,869 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:09:42,983 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:09:43,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:09:44,298 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:09:44,485 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:44,602 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:44,778 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:09:44,976 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:45,098 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:45,276 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:45,473 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:45,598 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:45,776 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:45,977 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:46,099 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:46,276 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:46,473 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:46,596 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:46,774 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:46,971 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:47,093 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:47,271 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:47,474 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:47,597 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:47,775 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:47,971 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:48,092 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:48,270 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:48,467 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:48,589 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:49,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:09:49,925 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:09:50,112 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:50,229 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:50,405 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:09:50,603 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:50,727 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:50,912 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:51,110 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:51,231 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:51,410 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:51,607 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:51,728 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:51,906 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:52,106 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:52,228 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:52,410 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:52,607 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:52,729 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:52,908 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:53,105 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:53,227 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:53,407 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:53,604 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:53,726 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:54,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:09:55,310 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:09:55,498 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:55,615 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:09:55,797 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:09:55,996 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:56,117 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:56,296 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:56,492 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:56,614 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:56,791 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:56,988 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:57,110 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:57,288 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:57,491 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:57,612 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:57,791 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:57,989 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:58,112 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:58,292 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:09:58,490 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:58,612 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:09:59,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:09:59,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:09:59,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:00,106 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:10:00,294 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:00,410 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:00,587 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:10:00,788 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:00,910 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:01,091 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:10:01,288 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:01,410 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:01,589 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:10:01,792 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:01,921 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:02,101 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:10:02,299 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:02,425 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:02,608 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:10:02,811 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:02,936 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:03,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:03,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:03,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:04,542 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:10:04,733 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:04,854 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:05,031 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:10:05,229 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:05,349 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:05,527 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:10:05,731 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:05,853 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:06,034 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:10:06,240 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:06,362 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:06,548 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:10:06,746 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:06,868 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:07,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:08,469 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:10:08,656 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:08,773 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:08,950 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:10:09,150 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:09,273 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:09,449 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:10:09,647 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:09,769 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:09,946 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:10:10,143 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:10,266 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:10,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:10,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:10,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:11,728 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:10:11,915 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:12,032 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:12,209 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:10:12,409 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:12,531 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:12,709 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:10:12,905 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:13,027 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:13,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:14,504 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:10:14,692 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:14,809 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:14,986 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:10:15,183 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:15,305 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:10:15,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:15,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:15,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:16,902 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:10:17,089 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:17,205 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:17,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:17,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:17,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:19,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:19,240 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:19,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:20,966 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:10:21,153 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:21,271 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:21,450 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:10:21,638 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:10:21,751 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:10:23,564 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:10:23,750 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:23,867 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:24,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:25,299 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:10:26,049 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:27,161 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:10:27,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:27,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:27,178 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:10:27,178 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 13:10:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 41 proven. 451 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-07-21 13:10:27,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252134303] [2020-07-21 13:10:27,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:27,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 44] total 60 [2020-07-21 13:10:27,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344363076] [2020-07-21 13:10:27,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-07-21 13:10:27,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-07-21 13:10:27,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3343, Unknown=0, NotChecked=0, Total=3540 [2020-07-21 13:10:27,336 INFO L87 Difference]: Start difference. First operand 69 states and 96 transitions. Second operand 60 states. [2020-07-21 13:10:35,300 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:10:36,102 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 13:10:48,276 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2020-07-21 13:10:49,221 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:10:51,259 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 13:10:52,561 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:10:58,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:58,494 INFO L93 Difference]: Finished difference Result 94 states and 131 transitions. [2020-07-21 13:10:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-07-21 13:10:58,495 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 107 [2020-07-21 13:10:58,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:58,496 INFO L225 Difference]: With dead ends: 94 [2020-07-21 13:10:58,496 INFO L226 Difference]: Without dead ends: 84 [2020-07-21 13:10:58,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 148 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 35.4s TimeCoverageRelationStatistics Valid=744, Invalid=7446, Unknown=0, NotChecked=0, Total=8190 [2020-07-21 13:10:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-21 13:10:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2020-07-21 13:10:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-21 13:10:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2020-07-21 13:10:58,505 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 107 [2020-07-21 13:10:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:58,505 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2020-07-21 13:10:58,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-07-21 13:10:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2020-07-21 13:10:58,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-21 13:10:58,506 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:58,507 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:58,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:58,721 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:58,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:58,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1189861785, now seen corresponding path program 19 times [2020-07-21 13:10:58,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:58,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083305500] [2020-07-21 13:10:58,722 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:58,909 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:58,914 WARN L261 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 205 conjunts are in the unsatisfiable core [2020-07-21 13:10:58,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:11:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 14 proven. 400 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2020-07-21 13:11:03,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:11:04,614 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:11:04,791 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:04,905 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:05,082 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:11:05,290 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:05,407 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:05,576 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:05,762 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:05,879 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:06,048 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:06,239 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:06,356 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:06,528 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:06,722 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:06,841 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:07,018 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:07,207 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:07,322 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:07,495 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:07,685 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:11:07,796 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:11:08,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:09,091 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:11:09,279 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:09,397 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:09,589 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:11:09,839 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:09,999 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:10,260 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:10,466 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:10,596 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:10,818 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:11,076 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:11,209 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:11,383 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:11,573 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:11,688 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:11,860 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:12,048 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:12,166 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:12,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:13,516 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:11:13,696 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:13,809 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:13,978 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:11:14,170 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:14,286 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:14,456 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:14,650 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:14,766 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:14,935 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:15,123 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:15,238 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:15,408 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:15,595 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:15,711 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:16,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:16,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:16,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:17,116 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:11:17,375 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:17,529 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:17,754 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:11:17,947 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:18,070 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:18,253 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:18,452 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:18,569 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:18,745 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:18,945 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:19,093 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:19,751 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2020-07-21 13:11:19,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:20,530 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 13:11:20,663 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 13:11:20,865 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:11:20,977 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 13:11:21,095 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:21,217 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:21,430 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:11:21,626 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:21,743 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:21,918 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:22,105 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:22,222 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:22,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:23,493 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:11:23,681 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:23,795 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:23,965 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:11:24,158 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:24,274 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:24,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:25,652 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:11:25,832 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:25,943 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:26,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:27,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:27,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:27,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:29,332 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:11:29,518 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:29,633 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:29,812 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:11:30,023 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:30,150 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:30,401 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:30,670 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:30,796 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:30,976 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:31,167 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:31,284 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:31,459 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:31,654 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:31,778 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:31,950 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:32,139 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:32,256 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:32,429 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:32,636 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:32,814 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:33,061 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:33,311 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:11:33,474 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-07-21 13:11:35,216 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:11:35,397 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:35,513 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:35,701 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:11:35,934 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:36,067 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:36,262 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:36,480 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:36,607 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:36,801 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:37,042 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:37,223 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:37,441 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:37,658 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:37,781 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:37,962 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:38,167 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:38,295 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:38,472 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:38,662 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:38,780 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:39,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:40,189 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:41,057 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 13:11:41,479 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:11:41,661 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:41,795 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:42,010 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:11:42,118 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 13:11:42,290 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:42,447 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:42,627 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:42,824 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:42,951 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:43,138 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:43,345 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:43,473 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:43,656 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:43,858 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:43,982 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:44,165 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:44,376 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:44,493 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:45,663 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 13:11:45,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:45,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:11:45,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-07-21 13:11:47,455 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-07-21 13:11:47,635 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:47,749 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-07-21 13:11:47,976 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 13:11:48,085 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 13:11:48,262 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:48,397 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:48,654 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:48,766 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2020-07-21 13:11:48,926 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:49,044 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:49,220 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:49,413 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:49,534 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:49,704 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2020-07-21 13:11:49,905 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:50,025 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2020-07-21 13:11:50,775 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 13:11:50,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083305500] [2020-07-21 13:11:50,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-21 13:11:50,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-21 13:11:50,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442518726] [2020-07-21 13:11:50,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 13:11:50,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:11:50,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 13:11:50,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2582, Unknown=0, NotChecked=0, Total=2756 [2020-07-21 13:11:50,782 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand 25 states.