/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 DAGSIZE --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/Fibonacci02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:16:05,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:16:05,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:16:05,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:16:05,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:16:05,130 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:16:05,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:16:05,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:16:05,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:16:05,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:16:05,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:16:05,153 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:16:05,153 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:16:05,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:16:05,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:16:05,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:16:05,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:16:05,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:16:05,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:16:05,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:16:05,173 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:16:05,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:16:05,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:16:05,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:16:05,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:16:05,193 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:16:05,194 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:16:05,195 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:16:05,196 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 19:16:05,227 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:16:05,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:16:05,230 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:16:05,230 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:16:05,230 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:16:05,231 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:16:05,231 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:16:05,231 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:16:05,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:16:05,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:16:05,233 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:16:05,233 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:16:05,233 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:16:05,233 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:16:05,234 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:16:05,234 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:16:05,234 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:16:05,234 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:16:05,234 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:16:05,236 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:16:05,236 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:16:05,237 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:16:05,238 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:16:05,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:16:05,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:16:05,239 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:16:05,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:05,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:16:05,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:16:05,240 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 -> DAGSIZE 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 19:16:05,551 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:16:05,563 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:16:05,566 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:16:05,567 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:16:05,568 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:16:05,568 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-21 19:16:05,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8db03eb5d/6747bee45eda459c97559fca4d998cb4/FLAGdc82bb8aa [2020-07-21 19:16:06,077 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:16:06,078 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci02.c [2020-07-21 19:16:06,085 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8db03eb5d/6747bee45eda459c97559fca4d998cb4/FLAGdc82bb8aa [2020-07-21 19:16:06,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8db03eb5d/6747bee45eda459c97559fca4d998cb4 [2020-07-21 19:16:06,515 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:16:06,519 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:16:06,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:16:06,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:16:06,523 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:16:06,524 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:16:06" (1/1) ... [2020-07-21 19:16:06,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e005e60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:06, skipping insertion in model container [2020-07-21 19:16:06,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:16:06" (1/1) ... [2020-07-21 19:16:06,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:16:06,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:16:06,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:16:06,713 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:16:06,729 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:16:06,743 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:16:06,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:06 WrapperNode [2020-07-21 19:16:06,744 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:16:06,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:16:06,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:16:06,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:16:06,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:06" (1/1) ... [2020-07-21 19:16:06,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:06" (1/1) ... [2020-07-21 19:16:06,760 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:06" (1/1) ... [2020-07-21 19:16:06,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:06" (1/1) ... [2020-07-21 19:16:06,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:06" (1/1) ... [2020-07-21 19:16:06,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:06" (1/1) ... [2020-07-21 19:16:06,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:06" (1/1) ... [2020-07-21 19:16:06,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:16:06,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:16:06,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:16:06,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:16:06,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:06" (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 19:16:06,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:16:06,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:16:06,909 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci [2020-07-21 19:16:06,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:16:06,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:16:06,910 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:16:06,910 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci [2020-07-21 19:16:06,910 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:16:06,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:16:06,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:16:07,078 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:16:07,079 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:16:07,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:16:07 BoogieIcfgContainer [2020-07-21 19:16:07,082 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:16:07,084 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:16:07,084 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:16:07,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:16:07,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:16:06" (1/3) ... [2020-07-21 19:16:07,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a828ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:16:07, skipping insertion in model container [2020-07-21 19:16:07,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:16:06" (2/3) ... [2020-07-21 19:16:07,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a828ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:16:07, skipping insertion in model container [2020-07-21 19:16:07,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:16:07" (3/3) ... [2020-07-21 19:16:07,091 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci02.c [2020-07-21 19:16:07,100 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:16:07,107 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:16:07,122 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:16:07,147 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:16:07,147 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:16:07,147 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:16:07,147 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:16:07,147 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:16:07,148 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:16:07,148 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:16:07,148 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:16:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-07-21 19:16:07,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:16:07,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:07,172 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:07,172 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:07,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:07,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1356498376, now seen corresponding path program 1 times [2020-07-21 19:16:07,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:07,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642620743] [2020-07-21 19:16:07,185 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 19:16:07,239 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:16:07,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:07,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:16:07,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:16:07,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:16:07,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642620743] [2020-07-21 19:16:07,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:16:07,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:16:07,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088431825] [2020-07-21 19:16:07,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:16:07,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:07,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:16:07,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:16:07,409 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-07-21 19:16:07,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:07,516 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-07-21 19:16:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:16:07,518 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:16:07,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:07,528 INFO L225 Difference]: With dead ends: 33 [2020-07-21 19:16:07,528 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 19:16:07,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:16:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 19:16:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 19:16:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 19:16:07,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 19:16:07,578 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 19:16:07,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:07,579 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 19:16:07,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:16:07,579 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 19:16:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 19:16:07,581 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:07,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:07,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:07,795 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:07,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:07,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1591396412, now seen corresponding path program 1 times [2020-07-21 19:16:07,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:07,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353769468] [2020-07-21 19:16:07,798 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 19:16:07,827 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:16:07,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:16:07,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:16:07,879 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:16:07,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353769468] [2020-07-21 19:16:07,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:16:07,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:16:07,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752539222] [2020-07-21 19:16:07,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:16:07,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:07,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:16:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:16:07,885 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 19:16:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:07,958 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 19:16:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:16:07,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 19:16:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:07,961 INFO L225 Difference]: With dead ends: 27 [2020-07-21 19:16:07,961 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 19:16:07,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:16:07,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 19:16:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 19:16:07,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 19:16:07,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 19:16:07,970 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 19:16:07,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:07,971 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 19:16:07,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:16:07,971 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 19:16:07,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 19:16:07,973 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:07,973 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:08,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:08,188 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:08,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1761048597, now seen corresponding path program 1 times [2020-07-21 19:16:08,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:08,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272832191] [2020-07-21 19:16:08,191 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 19:16:08,226 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:08,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:08,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:16:08,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:08,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:16:08,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:08,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:08,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 19:16:08,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272832191] [2020-07-21 19:16:08,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:08,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 19:16:08,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856609639] [2020-07-21 19:16:08,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 19:16:08,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:08,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 19:16:08,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 19:16:08,545 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 19:16:08,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:08,674 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 19:16:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:16:08,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 19:16:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:08,677 INFO L225 Difference]: With dead ends: 32 [2020-07-21 19:16:08,677 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 19:16:08,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:16:08,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 19:16:08,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 19:16:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 19:16:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 19:16:08,688 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 19:16:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:08,688 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 19:16:08,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 19:16:08,689 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 19:16:08,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 19:16:08,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:08,690 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:08,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:08,896 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:08,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:08,896 INFO L82 PathProgramCache]: Analyzing trace with hash -624449707, now seen corresponding path program 1 times [2020-07-21 19:16:08,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:08,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055122575] [2020-07-21 19:16:08,898 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 19:16:08,929 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:08,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:08,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:16:08,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 19:16:08,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:09,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 19:16:09,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055122575] [2020-07-21 19:16:09,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:09,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 19:16:09,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006062526] [2020-07-21 19:16:09,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 19:16:09,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:09,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 19:16:09,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 19:16:09,184 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 19:16:09,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:09,282 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 19:16:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:16:09,283 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 19:16:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:09,286 INFO L225 Difference]: With dead ends: 37 [2020-07-21 19:16:09,286 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 19:16:09,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:16:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 19:16:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 19:16:09,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 19:16:09,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 19:16:09,308 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 19:16:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:09,309 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 19:16:09,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 19:16:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 19:16:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 19:16:09,313 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:09,313 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:09,523 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:09,524 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:09,525 INFO L82 PathProgramCache]: Analyzing trace with hash 246499846, now seen corresponding path program 2 times [2020-07-21 19:16:09,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:09,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143763037] [2020-07-21 19:16:09,526 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 19:16:09,571 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:09,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:09,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:16:09,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 19:16:09,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:09,845 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:09,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:09,946 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 19:16:09,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143763037] [2020-07-21 19:16:09,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:09,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 19:16:09,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501348137] [2020-07-21 19:16:09,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:16:09,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:09,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:16:09,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:16:09,951 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 19:16:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:10,105 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 19:16:10,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:16:10,106 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 19:16:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:10,108 INFO L225 Difference]: With dead ends: 42 [2020-07-21 19:16:10,108 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 19:16:10,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:16:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 19:16:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 19:16:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 19:16:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 19:16:10,119 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 19:16:10,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:10,120 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 19:16:10,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:16:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 19:16:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 19:16:10,122 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:10,122 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:10,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:10,332 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:10,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:10,332 INFO L82 PathProgramCache]: Analyzing trace with hash 380905728, now seen corresponding path program 2 times [2020-07-21 19:16:10,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:10,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888952660] [2020-07-21 19:16:10,334 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 19:16:10,364 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:10,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:10,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:16:10,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 19:16:10,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:10,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:10,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:10,723 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 19:16:10,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888952660] [2020-07-21 19:16:10,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:10,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 19:16:10,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84966513] [2020-07-21 19:16:10,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 19:16:10,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:10,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 19:16:10,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 19:16:10,725 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 19:16:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:10,881 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 19:16:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:16:10,881 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 19:16:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:10,884 INFO L225 Difference]: With dead ends: 47 [2020-07-21 19:16:10,884 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 19:16:10,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:16:10,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 19:16:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 19:16:10,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 19:16:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 19:16:10,896 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 19:16:10,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:10,896 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 19:16:10,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 19:16:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 19:16:10,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 19:16:10,899 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:10,899 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:11,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:11,109 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:11,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:11,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2029845474, now seen corresponding path program 3 times [2020-07-21 19:16:11,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:11,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064221233] [2020-07-21 19:16:11,112 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 19:16:11,153 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:11,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:11,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:16:11,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 19:16:11,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:11,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:11,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:11,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:11,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:11,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:11,831 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 19:16:11,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064221233] [2020-07-21 19:16:11,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:11,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 19:16:11,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864799187] [2020-07-21 19:16:11,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:16:11,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:11,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:16:11,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:16:11,837 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 19:16:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:12,017 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 19:16:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:16:12,017 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 19:16:12,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:12,020 INFO L225 Difference]: With dead ends: 52 [2020-07-21 19:16:12,020 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 19:16:12,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:16:12,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 19:16:12,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 19:16:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 19:16:12,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 19:16:12,047 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 19:16:12,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:12,048 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 19:16:12,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:16:12,048 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 19:16:12,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-21 19:16:12,054 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:12,055 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:12,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:12,269 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:12,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:12,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1541039141, now seen corresponding path program 3 times [2020-07-21 19:16:12,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:12,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668516857] [2020-07-21 19:16:12,271 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 19:16:12,325 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:12,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:16:12,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 127 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-07-21 19:16:12,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:12,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:12,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:12,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:12,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 22 proven. 142 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-07-21 19:16:13,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668516857] [2020-07-21 19:16:13,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:13,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 19:16:13,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965876280] [2020-07-21 19:16:13,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 19:16:13,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 19:16:13,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 19:16:13,010 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 19:16:13,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:13,212 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 19:16:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:16:13,215 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-21 19:16:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:13,221 INFO L225 Difference]: With dead ends: 57 [2020-07-21 19:16:13,221 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 19:16:13,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:16:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 19:16:13,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 19:16:13,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 19:16:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 19:16:13,237 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 82 [2020-07-21 19:16:13,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:13,238 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 19:16:13,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 19:16:13,238 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 19:16:13,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 19:16:13,241 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:13,241 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:13,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:13,443 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:13,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:13,443 INFO L82 PathProgramCache]: Analyzing trace with hash 332479940, now seen corresponding path program 4 times [2020-07-21 19:16:13,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:13,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682347955] [2020-07-21 19:16:13,446 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 19:16:13,585 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:13,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:13,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:16:13,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 507 refuted. 0 times theorem prover too weak. 1481 trivial. 0 not checked. [2020-07-21 19:16:13,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:14,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:14,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:14,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:14,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2079 backedges. 91 proven. 529 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2020-07-21 19:16:14,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682347955] [2020-07-21 19:16:14,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:14,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 19:16:14,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874746144] [2020-07-21 19:16:14,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:16:14,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:14,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:16:14,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:16:14,888 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 19:16:15,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:15,093 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 19:16:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:16:15,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 195 [2020-07-21 19:16:15,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:15,107 INFO L225 Difference]: With dead ends: 62 [2020-07-21 19:16:15,108 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 19:16:15,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 367 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:16:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 19:16:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 19:16:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 19:16:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 19:16:15,137 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 195 [2020-07-21 19:16:15,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:15,137 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 19:16:15,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:16:15,138 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 19:16:15,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-07-21 19:16:15,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:15,142 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 8, 8, 8, 8, 8, 8, 8, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:15,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:15,343 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:15,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2116311810, now seen corresponding path program 4 times [2020-07-21 19:16:15,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:15,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891200267] [2020-07-21 19:16:15,344 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 19:16:15,416 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:15,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:15,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:16:15,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:15,481 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 268 refuted. 0 times theorem prover too weak. 412 trivial. 0 not checked. [2020-07-21 19:16:15,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:16,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:16,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:16,237 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:16,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:16,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:16,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:16,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:16,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 54 proven. 294 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 19:16:16,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891200267] [2020-07-21 19:16:16,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:16,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 19:16:16,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223979234] [2020-07-21 19:16:16,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:16:16,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:16,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:16:16,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:16:16,415 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 19:16:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:16,630 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 19:16:16,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:16:16,631 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 122 [2020-07-21 19:16:16,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:16,634 INFO L225 Difference]: With dead ends: 67 [2020-07-21 19:16:16,634 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 19:16:16,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 220 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:16:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 19:16:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 19:16:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 19:16:16,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 19:16:16,648 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 122 [2020-07-21 19:16:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:16,648 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 19:16:16,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:16:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 19:16:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 19:16:16,652 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:16,653 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:16,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:16,868 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:16,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1067745099, now seen corresponding path program 5 times [2020-07-21 19:16:16,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:16,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164754013] [2020-07-21 19:16:16,870 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 19:16:16,993 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:16,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:16,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:16:17,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:17,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 19:16:17,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:18,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:18,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:18,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:18,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:18,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:18,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:18,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:18,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:18,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:19,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 19:16:19,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164754013] [2020-07-21 19:16:19,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:19,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 19:16:19,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644254301] [2020-07-21 19:16:19,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:16:19,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:19,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:16:19,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:16:19,005 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 19:16:19,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:19,275 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 19:16:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:16:19,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 19:16:19,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:19,282 INFO L225 Difference]: With dead ends: 72 [2020-07-21 19:16:19,282 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 19:16:19,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:16:19,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 19:16:19,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 19:16:19,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 19:16:19,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 19:16:19,305 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 19:16:19,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:19,307 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 19:16:19,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:16:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 19:16:19,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 19:16:19,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:19,314 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:19,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:19,528 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:19,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:19,529 INFO L82 PathProgramCache]: Analyzing trace with hash -738141547, now seen corresponding path program 5 times [2020-07-21 19:16:19,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:19,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636680729] [2020-07-21 19:16:19,530 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 19:16:19,671 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:19,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:19,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:16:19,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-21 19:16:19,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:21,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:21,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:21,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:21,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:21,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:21,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:21,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:21,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:21,715 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-21 19:16:21,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636680729] [2020-07-21 19:16:21,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:21,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 19:16:21,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976702035] [2020-07-21 19:16:21,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:16:21,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:21,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:16:21,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:16:21,718 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-21 19:16:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:21,958 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 19:16:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:16:21,959 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 299 [2020-07-21 19:16:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:21,966 INFO L225 Difference]: With dead ends: 77 [2020-07-21 19:16:21,966 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 19:16:21,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:16:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 19:16:21,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 19:16:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 19:16:21,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 19:16:21,987 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-21 19:16:21,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:21,988 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 19:16:21,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:16:21,988 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 19:16:21,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 19:16:21,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:21,995 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:22,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:22,209 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:22,210 INFO L82 PathProgramCache]: Analyzing trace with hash 956910434, now seen corresponding path program 6 times [2020-07-21 19:16:22,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:22,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118390962] [2020-07-21 19:16:22,211 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 19:16:22,397 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:22,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:22,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:16:22,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 268 proven. 1385 refuted. 0 times theorem prover too weak. 5484 trivial. 0 not checked. [2020-07-21 19:16:22,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:24,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:24,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:24,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:24,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:24,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:25,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:25,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:25,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 268 proven. 1436 refuted. 0 times theorem prover too weak. 5433 trivial. 0 not checked. [2020-07-21 19:16:25,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118390962] [2020-07-21 19:16:25,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:25,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 19:16:25,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660859159] [2020-07-21 19:16:25,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:16:25,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:25,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:16:25,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:16:25,314 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-21 19:16:25,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:25,636 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 19:16:25,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:16:25,637 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 351 [2020-07-21 19:16:25,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:25,641 INFO L225 Difference]: With dead ends: 82 [2020-07-21 19:16:25,642 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 19:16:25,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 671 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:16:25,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 19:16:25,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 19:16:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 19:16:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 19:16:25,666 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 351 [2020-07-21 19:16:25,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:25,667 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 19:16:25,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:16:25,667 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 19:16:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2020-07-21 19:16:25,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:25,674 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 77, 44, 44, 44, 44, 44, 44, 44, 33, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:25,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:25,889 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2029957590, now seen corresponding path program 6 times [2020-07-21 19:16:25,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:25,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481047271] [2020-07-21 19:16:25,890 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 19:16:26,161 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:26,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:26,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 1372 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:16:26,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 22374 backedges. 491 proven. 2720 refuted. 0 times theorem prover too weak. 19163 trivial. 0 not checked. [2020-07-21 19:16:26,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:28,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:28,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:29,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:29,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:29,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:29,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:29,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:29,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 22374 backedges. 491 proven. 2777 refuted. 0 times theorem prover too weak. 19106 trivial. 0 not checked. [2020-07-21 19:16:30,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481047271] [2020-07-21 19:16:30,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:30,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 19:16:30,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298971217] [2020-07-21 19:16:30,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:16:30,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:30,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:16:30,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:16:30,175 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-21 19:16:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:30,464 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-21 19:16:30,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:16:30,465 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 618 [2020-07-21 19:16:30,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:30,469 INFO L225 Difference]: With dead ends: 87 [2020-07-21 19:16:30,469 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 19:16:30,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1242 GetRequests, 1204 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:16:30,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 19:16:30,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-21 19:16:30,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 19:16:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 19:16:30,495 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 618 [2020-07-21 19:16:30,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:30,497 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 19:16:30,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:16:30,498 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 19:16:30,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 19:16:30,511 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:30,512 INFO L422 BasicCegarLoop]: trace histogram [133, 133, 67, 66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:30,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:30,728 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:30,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:30,729 INFO L82 PathProgramCache]: Analyzing trace with hash 341063264, now seen corresponding path program 7 times [2020-07-21 19:16:30,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:30,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090314925] [2020-07-21 19:16:30,729 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 19:16:31,113 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:31,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:31,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 1944 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:16:31,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 687 proven. 4497 refuted. 0 times theorem prover too weak. 40653 trivial. 0 not checked. [2020-07-21 19:16:31,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:34,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:35,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:36,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:36,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:36,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:36,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:36,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:36,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 687 proven. 4567 refuted. 0 times theorem prover too weak. 40583 trivial. 0 not checked. [2020-07-21 19:16:37,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090314925] [2020-07-21 19:16:37,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:37,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 19:16:37,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798705937] [2020-07-21 19:16:37,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:16:37,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:37,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:16:37,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:16:37,334 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-21 19:16:37,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:37,631 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-21 19:16:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:16:37,632 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 871 [2020-07-21 19:16:37,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:37,637 INFO L225 Difference]: With dead ends: 92 [2020-07-21 19:16:37,637 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 19:16:37,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1750 GetRequests, 1707 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:16:37,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 19:16:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-21 19:16:37,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 19:16:37,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 19:16:37,660 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 871 [2020-07-21 19:16:37,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:37,661 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 19:16:37,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:16:37,662 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 19:16:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 838 [2020-07-21 19:16:37,670 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:37,670 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 104, 60, 60, 60, 60, 60, 60, 60, 44, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:37,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:37,884 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:37,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:37,884 INFO L82 PathProgramCache]: Analyzing trace with hash 847273596, now seen corresponding path program 7 times [2020-07-21 19:16:37,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:37,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643801284] [2020-07-21 19:16:37,885 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 19:16:38,269 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:38,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:38,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 1858 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:16:38,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:38,655 INFO L134 CoverageAnalysis]: Checked inductivity of 41476 backedges. 671 proven. 4412 refuted. 0 times theorem prover too weak. 36393 trivial. 0 not checked. [2020-07-21 19:16:38,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:41,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:41,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:42,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:42,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:43,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:43,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:43,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:43,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:43,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:43,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:43,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:43,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:44,168 INFO L134 CoverageAnalysis]: Checked inductivity of 41476 backedges. 671 proven. 4489 refuted. 0 times theorem prover too weak. 36316 trivial. 0 not checked. [2020-07-21 19:16:44,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643801284] [2020-07-21 19:16:44,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:44,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 19:16:44,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943301413] [2020-07-21 19:16:44,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:16:44,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:44,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:16:44,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:16:44,172 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 20 states. [2020-07-21 19:16:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:44,613 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-21 19:16:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:16:44,614 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 837 [2020-07-21 19:16:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:44,619 INFO L225 Difference]: With dead ends: 97 [2020-07-21 19:16:44,619 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 19:16:44,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1681 GetRequests, 1638 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:16:44,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 19:16:44,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-21 19:16:44,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 19:16:44,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 19:16:44,636 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 837 [2020-07-21 19:16:44,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:44,637 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 19:16:44,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:16:44,637 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 19:16:44,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 937 [2020-07-21 19:16:44,646 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:44,647 INFO L422 BasicCegarLoop]: trace histogram [143, 143, 72, 71, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:44,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:44,861 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:44,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1176387739, now seen corresponding path program 8 times [2020-07-21 19:16:44,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:44,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498077871] [2020-07-21 19:16:44,863 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 19:16:45,285 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:45,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:45,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 2089 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:16:45,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:45,711 INFO L134 CoverageAnalysis]: Checked inductivity of 53037 backedges. 863 proven. 5431 refuted. 0 times theorem prover too weak. 46743 trivial. 0 not checked. [2020-07-21 19:16:45,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:16:49,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:50,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:50,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:51,769 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:52,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:52,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:52,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:52,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:52,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:52,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:52,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:16:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 53037 backedges. 863 proven. 5523 refuted. 0 times theorem prover too weak. 46651 trivial. 0 not checked. [2020-07-21 19:16:53,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498077871] [2020-07-21 19:16:53,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:16:53,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 19:16:53,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299489952] [2020-07-21 19:16:53,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:16:53,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:16:53,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:16:53,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:16:53,159 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 22 states. [2020-07-21 19:16:53,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:16:53,589 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-21 19:16:53,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:16:53,590 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 936 [2020-07-21 19:16:53,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:16:53,595 INFO L225 Difference]: With dead ends: 102 [2020-07-21 19:16:53,596 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 19:16:53,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1881 GetRequests, 1833 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 19:16:53,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 19:16:53,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-21 19:16:53,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 19:16:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 19:16:53,612 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 936 [2020-07-21 19:16:53,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:16:53,613 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 19:16:53,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:16:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 19:16:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1690 [2020-07-21 19:16:53,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:16:53,639 INFO L422 BasicCegarLoop]: trace histogram [245, 245, 212, 122, 122, 122, 122, 122, 122, 122, 90, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:16:53,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:16:53,854 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:16:53,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:16:53,855 INFO L82 PathProgramCache]: Analyzing trace with hash -263746810, now seen corresponding path program 8 times [2020-07-21 19:16:53,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:16:53,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916447351] [2020-07-21 19:16:53,856 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 19:16:54,514 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:16:54,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:16:54,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 3748 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:16:54,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:16:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1790 proven. 10673 refuted. 0 times theorem prover too weak. 158987 trivial. 0 not checked. [2020-07-21 19:16:55,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:00,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:00,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:03,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:03,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:05,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:05,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:05,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:06,048 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:06,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:06,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:06,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:07,309 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1800 proven. 10755 refuted. 0 times theorem prover too weak. 158895 trivial. 0 not checked. [2020-07-21 19:17:07,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916447351] [2020-07-21 19:17:07,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:07,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 19:17:07,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123385472] [2020-07-21 19:17:07,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:17:07,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:07,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:17:07,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:17:07,313 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 22 states. [2020-07-21 19:17:07,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:07,803 INFO L93 Difference]: Finished difference Result 245 states and 2197 transitions. [2020-07-21 19:17:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:17:07,804 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1689 [2020-07-21 19:17:07,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:07,808 INFO L225 Difference]: With dead ends: 245 [2020-07-21 19:17:07,808 INFO L226 Difference]: Without dead ends: 69 [2020-07-21 19:17:07,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3386 GetRequests, 3338 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 19:17:07,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-21 19:17:07,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-21 19:17:07,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 19:17:07,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 94 transitions. [2020-07-21 19:17:07,831 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 94 transitions. Word has length 1689 [2020-07-21 19:17:07,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:07,832 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 94 transitions. [2020-07-21 19:17:07,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:17:07,832 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 94 transitions. [2020-07-21 19:17:07,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2020-07-21 19:17:07,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:07,844 INFO L422 BasicCegarLoop]: trace histogram [151, 151, 122, 75, 75, 75, 75, 75, 75, 75, 47, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:08,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:08,057 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:08,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1302353203, now seen corresponding path program 9 times [2020-07-21 19:17:08,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:08,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695301746] [2020-07-21 19:17:08,058 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 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 19:17:08,585 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:08,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:08,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 2299 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:17:08,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1347 proven. 6076 refuted. 0 times theorem prover too weak. 56358 trivial. 0 not checked. [2020-07-21 19:17:09,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:13,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:14,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:15,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:16,283 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:16,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:16,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:16,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:16,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:16,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:16,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:16,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:16,979 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 63781 backedges. 1355 proven. 6160 refuted. 0 times theorem prover too weak. 56266 trivial. 0 not checked. [2020-07-21 19:17:17,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695301746] [2020-07-21 19:17:17,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:17,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 19:17:17,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434727762] [2020-07-21 19:17:17,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:17:17,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:17,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:17:17,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:17:17,471 INFO L87 Difference]: Start difference. First operand 69 states and 94 transitions. Second operand 22 states. [2020-07-21 19:17:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:17,862 INFO L93 Difference]: Finished difference Result 107 states and 145 transitions. [2020-07-21 19:17:17,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:17:17,870 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 1035 [2020-07-21 19:17:17,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:17,872 INFO L225 Difference]: With dead ends: 107 [2020-07-21 19:17:17,872 INFO L226 Difference]: Without dead ends: 80 [2020-07-21 19:17:17,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2078 GetRequests, 2030 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 19:17:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-21 19:17:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-07-21 19:17:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-07-21 19:17:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2020-07-21 19:17:17,885 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 1035 [2020-07-21 19:17:17,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:17,886 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2020-07-21 19:17:17,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:17:17,886 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2020-07-21 19:17:17,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 831 [2020-07-21 19:17:17,894 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:17,895 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 97, 60, 60, 60, 60, 60, 60, 60, 37, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:18,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:18,110 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:18,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:18,110 INFO L82 PathProgramCache]: Analyzing trace with hash -260964346, now seen corresponding path program 10 times [2020-07-21 19:17:18,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:18,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439598890] [2020-07-21 19:17:18,111 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 19:17:18,601 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:18,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:18,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 1844 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:17:18,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1287 proven. 4349 refuted. 0 times theorem prover too weak. 35140 trivial. 0 not checked. [2020-07-21 19:17:19,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:22,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:24,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:24,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:25,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:25,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:25,772 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:25,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:26,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:26,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:26,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:26,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:26,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 40776 backedges. 1293 proven. 4443 refuted. 0 times theorem prover too weak. 35040 trivial. 0 not checked. [2020-07-21 19:17:26,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439598890] [2020-07-21 19:17:26,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:26,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 19:17:26,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759272743] [2020-07-21 19:17:26,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:17:26,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:26,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:17:26,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:17:26,645 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand 22 states. [2020-07-21 19:17:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:27,013 INFO L93 Difference]: Finished difference Result 117 states and 160 transitions. [2020-07-21 19:17:27,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:17:27,014 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 830 [2020-07-21 19:17:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:27,017 INFO L225 Difference]: With dead ends: 117 [2020-07-21 19:17:27,017 INFO L226 Difference]: Without dead ends: 95 [2020-07-21 19:17:27,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1668 GetRequests, 1620 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 19:17:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-07-21 19:17:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2020-07-21 19:17:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-07-21 19:17:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2020-07-21 19:17:27,030 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 830 [2020-07-21 19:17:27,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:27,031 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2020-07-21 19:17:27,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:17:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2020-07-21 19:17:27,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-21 19:17:27,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:27,038 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:27,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:27,253 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:27,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:27,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1616877860, now seen corresponding path program 11 times [2020-07-21 19:17:27,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:27,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455720683] [2020-07-21 19:17:27,254 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 19:17:27,780 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:27,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:27,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 439 conjunts are in the unsatisfiable core [2020-07-21 19:17:27,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 19:17:28,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 0 proven. 10899 refuted. 0 times theorem prover too weak. 22197 trivial. 0 not checked. [2020-07-21 19:17:41,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455720683] [2020-07-21 19:17:41,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:41,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2020-07-21 19:17:41,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753094333] [2020-07-21 19:17:41,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-21 19:17:41,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:41,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-21 19:17:41,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 19:17:41,616 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 36 states. [2020-07-21 19:17:42,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:42,654 INFO L93 Difference]: Finished difference Result 167 states and 272 transitions. [2020-07-21 19:17:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-21 19:17:42,655 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 749 [2020-07-21 19:17:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:42,662 INFO L225 Difference]: With dead ends: 167 [2020-07-21 19:17:42,663 INFO L226 Difference]: Without dead ends: 160 [2020-07-21 19:17:42,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1499 GetRequests, 1462 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=1313, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 19:17:42,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-21 19:17:42,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2020-07-21 19:17:42,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 19:17:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 221 transitions. [2020-07-21 19:17:42,692 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 221 transitions. Word has length 749 [2020-07-21 19:17:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:42,693 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 221 transitions. [2020-07-21 19:17:42,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-21 19:17:42,693 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 221 transitions. [2020-07-21 19:17:42,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 834 [2020-07-21 19:17:42,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:42,709 INFO L422 BasicCegarLoop]: trace histogram [123, 123, 88, 61, 61, 61, 61, 61, 61, 61, 35, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:42,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:42,925 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:42,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1381744591, now seen corresponding path program 12 times [2020-07-21 19:17:42,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:42,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982344128] [2020-07-21 19:17:42,926 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 19:17:43,503 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:43,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:43,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1853 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 19:17:43,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:43,881 INFO L134 CoverageAnalysis]: Checked inductivity of 41160 backedges. 1007 proven. 3623 refuted. 0 times theorem prover too weak. 36530 trivial. 0 not checked. [2020-07-21 19:17:43,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:47,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:47,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:48,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:48,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:48,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 41160 backedges. 1017 proven. 3666 refuted. 0 times theorem prover too weak. 36477 trivial. 0 not checked. [2020-07-21 19:17:49,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982344128] [2020-07-21 19:17:49,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:49,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 19:17:49,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642068442] [2020-07-21 19:17:49,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:17:49,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:49,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:17:49,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:17:49,820 INFO L87 Difference]: Start difference. First operand 131 states and 221 transitions. Second operand 20 states. [2020-07-21 19:17:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:50,137 INFO L93 Difference]: Finished difference Result 183 states and 316 transitions. [2020-07-21 19:17:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:17:50,140 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 833 [2020-07-21 19:17:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:50,144 INFO L225 Difference]: With dead ends: 183 [2020-07-21 19:17:50,144 INFO L226 Difference]: Without dead ends: 156 [2020-07-21 19:17:50,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1672 GetRequests, 1632 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 19:17:50,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-21 19:17:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 134. [2020-07-21 19:17:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 19:17:50,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 224 transitions. [2020-07-21 19:17:50,172 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 224 transitions. Word has length 833 [2020-07-21 19:17:50,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:50,173 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 224 transitions. [2020-07-21 19:17:50,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:17:50,173 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 224 transitions. [2020-07-21 19:17:50,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 19:17:50,189 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:50,189 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:50,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:50,404 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash 2145431876, now seen corresponding path program 13 times [2020-07-21 19:17:50,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:50,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759769623] [2020-07-21 19:17:50,406 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 19:17:50,991 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:50,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:50,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:17:51,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1929 proven. 1768 refuted. 0 times theorem prover too weak. 31603 trivial. 0 not checked. [2020-07-21 19:17:51,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:17:54,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:54,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:54,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:54,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:54,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:54,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:54,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:54,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:55,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:55,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:55,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:55,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:17:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1930 proven. 1808 refuted. 0 times theorem prover too weak. 31562 trivial. 0 not checked. [2020-07-21 19:17:56,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759769623] [2020-07-21 19:17:56,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:17:56,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 19:17:56,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068307815] [2020-07-21 19:17:56,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 19:17:56,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:17:56,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 19:17:56,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:17:56,327 INFO L87 Difference]: Start difference. First operand 134 states and 224 transitions. Second operand 18 states. [2020-07-21 19:17:56,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:17:56,617 INFO L93 Difference]: Finished difference Result 174 states and 293 transitions. [2020-07-21 19:17:56,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:17:56,619 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 773 [2020-07-21 19:17:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:17:56,622 INFO L225 Difference]: With dead ends: 174 [2020-07-21 19:17:56,622 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 19:17:56,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1551 GetRequests, 1516 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:17:56,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 19:17:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 140. [2020-07-21 19:17:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-07-21 19:17:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 232 transitions. [2020-07-21 19:17:56,650 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 232 transitions. Word has length 773 [2020-07-21 19:17:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:17:56,650 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 232 transitions. [2020-07-21 19:17:56,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 19:17:56,651 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 232 transitions. [2020-07-21 19:17:56,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 810 [2020-07-21 19:17:56,663 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:17:56,664 INFO L422 BasicCegarLoop]: trace histogram [119, 119, 88, 59, 59, 59, 59, 59, 59, 59, 31, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:17:56,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:56,878 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:17:56,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:17:56,879 INFO L82 PathProgramCache]: Analyzing trace with hash 911409493, now seen corresponding path program 14 times [2020-07-21 19:17:56,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:17:56,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142504972] [2020-07-21 19:17:56,880 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:17:57,473 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:17:57,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:17:57,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 19:17:57,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:17:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 38756 backedges. 975 proven. 4115 refuted. 0 times theorem prover too weak. 33666 trivial. 0 not checked. [2020-07-21 19:17:57,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:01,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:02,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:03,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,143 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,144 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:04,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 38756 backedges. 978 proven. 4182 refuted. 0 times theorem prover too weak. 33596 trivial. 0 not checked. [2020-07-21 19:18:05,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142504972] [2020-07-21 19:18:05,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:05,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 19:18:05,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283708834] [2020-07-21 19:18:05,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:18:05,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:05,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:18:05,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:18:05,106 INFO L87 Difference]: Start difference. First operand 140 states and 232 transitions. Second operand 22 states. [2020-07-21 19:18:05,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:05,704 INFO L93 Difference]: Finished difference Result 307 states and 562 transitions. [2020-07-21 19:18:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:18:05,705 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 809 [2020-07-21 19:18:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:05,713 INFO L225 Difference]: With dead ends: 307 [2020-07-21 19:18:05,713 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 19:18:05,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1625 GetRequests, 1580 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 19:18:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 19:18:05,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-21 19:18:05,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 19:18:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 210 transitions. [2020-07-21 19:18:05,773 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 210 transitions. Word has length 809 [2020-07-21 19:18:05,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:05,774 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 210 transitions. [2020-07-21 19:18:05,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:18:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 210 transitions. [2020-07-21 19:18:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 19:18:05,788 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:05,788 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:06,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:06,004 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:06,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:06,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1476248066, now seen corresponding path program 15 times [2020-07-21 19:18:06,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:06,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680604925] [2020-07-21 19:18:06,005 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:06,635 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:06,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:06,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 19:18:06,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1004 proven. 3846 refuted. 0 times theorem prover too weak. 30450 trivial. 0 not checked. [2020-07-21 19:18:06,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:10,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:10,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:11,967 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:12,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:13,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:13,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:13,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:13,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:13,628 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:13,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:13,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1005 proven. 3915 refuted. 0 times theorem prover too weak. 30380 trivial. 0 not checked. [2020-07-21 19:18:14,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680604925] [2020-07-21 19:18:14,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:14,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 19:18:14,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690404333] [2020-07-21 19:18:14,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:18:14,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:14,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:18:14,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:18:14,130 INFO L87 Difference]: Start difference. First operand 134 states and 210 transitions. Second operand 22 states. [2020-07-21 19:18:14,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:14,633 INFO L93 Difference]: Finished difference Result 170 states and 262 transitions. [2020-07-21 19:18:14,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:18:14,635 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 773 [2020-07-21 19:18:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:14,641 INFO L225 Difference]: With dead ends: 170 [2020-07-21 19:18:14,641 INFO L226 Difference]: Without dead ends: 143 [2020-07-21 19:18:14,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1553 GetRequests, 1508 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 19:18:14,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-21 19:18:14,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 131. [2020-07-21 19:18:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-07-21 19:18:14,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 205 transitions. [2020-07-21 19:18:14,685 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 205 transitions. Word has length 773 [2020-07-21 19:18:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:14,686 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 205 transitions. [2020-07-21 19:18:14,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:18:14,687 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 205 transitions. [2020-07-21 19:18:14,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 19:18:14,704 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:14,705 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:14,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:14,921 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:14,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:14,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1169932622, now seen corresponding path program 16 times [2020-07-21 19:18:14,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:14,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427423310] [2020-07-21 19:18:14,922 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:15,559 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:15,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:15,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:18:15,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 1399 proven. 3106 refuted. 0 times theorem prover too weak. 28679 trivial. 0 not checked. [2020-07-21 19:18:15,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:19,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:20,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:21,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:21,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:21,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:21,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:21,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:21,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:21,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:21,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:21,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:21,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:22,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 1413 proven. 3171 refuted. 0 times theorem prover too weak. 28600 trivial. 0 not checked. [2020-07-21 19:18:22,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427423310] [2020-07-21 19:18:22,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:22,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 19:18:22,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251036848] [2020-07-21 19:18:22,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:18:22,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:22,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:18:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:18:22,619 INFO L87 Difference]: Start difference. First operand 131 states and 205 transitions. Second operand 20 states. [2020-07-21 19:18:22,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:22,947 INFO L93 Difference]: Finished difference Result 190 states and 297 transitions. [2020-07-21 19:18:22,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:18:22,949 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 750 [2020-07-21 19:18:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:22,953 INFO L225 Difference]: With dead ends: 190 [2020-07-21 19:18:22,954 INFO L226 Difference]: Without dead ends: 173 [2020-07-21 19:18:22,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1507 GetRequests, 1464 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:18:22,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-07-21 19:18:22,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 149. [2020-07-21 19:18:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 19:18:22,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 236 transitions. [2020-07-21 19:18:22,989 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 236 transitions. Word has length 750 [2020-07-21 19:18:22,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:22,990 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 236 transitions. [2020-07-21 19:18:22,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:18:22,991 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 236 transitions. [2020-07-21 19:18:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 763 [2020-07-21 19:18:23,008 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:23,008 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 89, 55, 55, 55, 55, 55, 55, 55, 34, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:23,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:23,222 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:23,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:23,223 INFO L82 PathProgramCache]: Analyzing trace with hash -410869165, now seen corresponding path program 17 times [2020-07-21 19:18:23,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:23,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460806834] [2020-07-21 19:18:23,223 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:23,892 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:23,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 1693 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:18:23,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 34276 backedges. 2025 proven. 2556 refuted. 0 times theorem prover too weak. 29695 trivial. 0 not checked. [2020-07-21 19:18:24,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:28,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:28,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:29,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:29,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:29,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:29,881 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:29,997 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:30,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:30,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:30,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:30,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34276 backedges. 2037 proven. 2623 refuted. 0 times theorem prover too weak. 29616 trivial. 0 not checked. [2020-07-21 19:18:31,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460806834] [2020-07-21 19:18:31,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:31,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 19:18:31,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577097317] [2020-07-21 19:18:31,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:18:31,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:31,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:18:31,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:18:31,253 INFO L87 Difference]: Start difference. First operand 149 states and 236 transitions. Second operand 20 states. [2020-07-21 19:18:31,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:31,661 INFO L93 Difference]: Finished difference Result 208 states and 325 transitions. [2020-07-21 19:18:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:18:31,662 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 762 [2020-07-21 19:18:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:31,667 INFO L225 Difference]: With dead ends: 208 [2020-07-21 19:18:31,667 INFO L226 Difference]: Without dead ends: 196 [2020-07-21 19:18:31,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1531 GetRequests, 1488 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:18:31,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-07-21 19:18:31,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 154. [2020-07-21 19:18:31,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 19:18:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 243 transitions. [2020-07-21 19:18:31,709 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 243 transitions. Word has length 762 [2020-07-21 19:18:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:31,710 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 243 transitions. [2020-07-21 19:18:31,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:18:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 243 transitions. [2020-07-21 19:18:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 774 [2020-07-21 19:18:31,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:31,729 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 88, 56, 56, 56, 56, 56, 56, 56, 32, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:31,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:31,944 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:31,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:31,944 INFO L82 PathProgramCache]: Analyzing trace with hash 156983302, now seen corresponding path program 18 times [2020-07-21 19:18:31,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:31,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825656380] [2020-07-21 19:18:31,944 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:32,661 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:32,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:32,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 19:18:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1092 proven. 3188 refuted. 0 times theorem prover too weak. 31020 trivial. 0 not checked. [2020-07-21 19:18:33,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:36,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:36,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:37,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:38,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:38,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:38,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:38,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:39,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:39,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:39,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:39,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:39,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 35300 backedges. 1100 proven. 3233 refuted. 0 times theorem prover too weak. 30967 trivial. 0 not checked. [2020-07-21 19:18:39,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825656380] [2020-07-21 19:18:39,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:39,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 20 [2020-07-21 19:18:39,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377812952] [2020-07-21 19:18:39,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:18:39,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:39,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:18:39,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:18:39,694 INFO L87 Difference]: Start difference. First operand 154 states and 243 transitions. Second operand 20 states. [2020-07-21 19:18:40,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:40,021 INFO L93 Difference]: Finished difference Result 227 states and 354 transitions. [2020-07-21 19:18:40,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:18:40,022 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 773 [2020-07-21 19:18:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:40,027 INFO L225 Difference]: With dead ends: 227 [2020-07-21 19:18:40,028 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 19:18:40,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1552 GetRequests, 1512 SyntacticMatches, 15 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-07-21 19:18:40,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 19:18:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 154. [2020-07-21 19:18:40,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 19:18:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 243 transitions. [2020-07-21 19:18:40,062 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 243 transitions. Word has length 773 [2020-07-21 19:18:40,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:40,062 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 243 transitions. [2020-07-21 19:18:40,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:18:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 243 transitions. [2020-07-21 19:18:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2020-07-21 19:18:40,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:40,078 INFO L422 BasicCegarLoop]: trace histogram [117, 117, 88, 58, 58, 58, 58, 58, 58, 58, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:40,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:40,293 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:40,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:40,293 INFO L82 PathProgramCache]: Analyzing trace with hash 567519526, now seen corresponding path program 19 times [2020-07-21 19:18:40,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:40,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344381747] [2020-07-21 19:18:40,294 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:41,110 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:41,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:41,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1772 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 19:18:41,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 1201 proven. 3809 refuted. 0 times theorem prover too weak. 32574 trivial. 0 not checked. [2020-07-21 19:18:41,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:45,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:45,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:47,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:47,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:47,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:48,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:48,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:48,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:48,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:48,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:48,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 37584 backedges. 1200 proven. 3880 refuted. 0 times theorem prover too weak. 32504 trivial. 0 not checked. [2020-07-21 19:18:49,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344381747] [2020-07-21 19:18:49,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:49,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 22 [2020-07-21 19:18:49,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657654152] [2020-07-21 19:18:49,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:18:49,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:49,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:18:49,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:18:49,527 INFO L87 Difference]: Start difference. First operand 154 states and 243 transitions. Second operand 22 states. [2020-07-21 19:18:50,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:50,003 INFO L93 Difference]: Finished difference Result 212 states and 324 transitions. [2020-07-21 19:18:50,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:18:50,005 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 797 [2020-07-21 19:18:50,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:50,015 INFO L225 Difference]: With dead ends: 212 [2020-07-21 19:18:50,015 INFO L226 Difference]: Without dead ends: 187 [2020-07-21 19:18:50,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1601 GetRequests, 1556 SyntacticMatches, 17 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=570, Unknown=0, NotChecked=0, Total=870 [2020-07-21 19:18:50,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-21 19:18:50,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-07-21 19:18:50,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-21 19:18:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 219 transitions. [2020-07-21 19:18:50,067 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 219 transitions. Word has length 797 [2020-07-21 19:18:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:50,067 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 219 transitions. [2020-07-21 19:18:50,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:18:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 219 transitions. [2020-07-21 19:18:50,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 19:18:50,085 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:50,086 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:50,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:50,302 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:50,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:50,303 INFO L82 PathProgramCache]: Analyzing trace with hash -723265579, now seen corresponding path program 20 times [2020-07-21 19:18:50,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:50,303 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172761437] [2020-07-21 19:18:50,303 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:51,043 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:51,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:51,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:18:51,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3090 proven. 547 refuted. 0 times theorem prover too weak. 30551 trivial. 0 not checked. [2020-07-21 19:18:51,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:18:53,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:53,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:53,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:53,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:54,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:54,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:54,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:54,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:54,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:54,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:55,210 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:18:56,998 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 3089 proven. 589 refuted. 0 times theorem prover too weak. 30510 trivial. 0 not checked. [2020-07-21 19:18:56,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172761437] [2020-07-21 19:18:56,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:18:56,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 18 [2020-07-21 19:18:57,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850149380] [2020-07-21 19:18:57,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 19:18:57,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:18:57,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 19:18:57,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:18:57,001 INFO L87 Difference]: Start difference. First operand 141 states and 219 transitions. Second operand 18 states. [2020-07-21 19:18:57,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:18:57,327 INFO L93 Difference]: Finished difference Result 226 states and 357 transitions. [2020-07-21 19:18:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:18:57,327 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 761 [2020-07-21 19:18:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:18:57,333 INFO L225 Difference]: With dead ends: 226 [2020-07-21 19:18:57,334 INFO L226 Difference]: Without dead ends: 219 [2020-07-21 19:18:57,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1527 GetRequests, 1492 SyntacticMatches, 13 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=360, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:18:57,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-21 19:18:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 173. [2020-07-21 19:18:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 19:18:57,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 273 transitions. [2020-07-21 19:18:57,374 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 273 transitions. Word has length 761 [2020-07-21 19:18:57,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:18:57,375 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 273 transitions. [2020-07-21 19:18:57,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 19:18:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 273 transitions. [2020-07-21 19:18:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2020-07-21 19:18:57,396 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:18:57,396 INFO L422 BasicCegarLoop]: trace histogram [113, 113, 89, 56, 56, 56, 56, 56, 56, 56, 33, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:18:57,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:57,610 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:18:57,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:18:57,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1464930502, now seen corresponding path program 21 times [2020-07-21 19:18:57,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:18:57,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206549416] [2020-07-21 19:18:57,611 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:18:58,365 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:18:58,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:18:58,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1720 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:18:58,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:18:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 35388 backedges. 1466 proven. 3191 refuted. 0 times theorem prover too weak. 30731 trivial. 0 not checked. [2020-07-21 19:18:58,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:19:02,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:04,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:04,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:04,698 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:04,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:05,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:05,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:05,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:05,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:05,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:05,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 35388 backedges. 1478 proven. 3258 refuted. 0 times theorem prover too weak. 30652 trivial. 0 not checked. [2020-07-21 19:19:06,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206549416] [2020-07-21 19:19:06,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:19:06,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 19:19:06,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439257899] [2020-07-21 19:19:06,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:19:06,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:19:06,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:19:06,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:19:06,502 INFO L87 Difference]: Start difference. First operand 173 states and 273 transitions. Second operand 20 states. [2020-07-21 19:19:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:19:06,942 INFO L93 Difference]: Finished difference Result 252 states and 394 transitions. [2020-07-21 19:19:06,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:19:06,944 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 774 [2020-07-21 19:19:06,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:19:06,953 INFO L225 Difference]: With dead ends: 252 [2020-07-21 19:19:06,953 INFO L226 Difference]: Without dead ends: 225 [2020-07-21 19:19:06,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1555 GetRequests, 1512 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:19:06,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-21 19:19:07,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 183. [2020-07-21 19:19:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-07-21 19:19:07,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 290 transitions. [2020-07-21 19:19:07,008 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 290 transitions. Word has length 774 [2020-07-21 19:19:07,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:19:07,009 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 290 transitions. [2020-07-21 19:19:07,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:19:07,009 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 290 transitions. [2020-07-21 19:19:07,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2020-07-21 19:19:07,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:19:07,033 INFO L422 BasicCegarLoop]: trace histogram [111, 111, 88, 55, 55, 55, 55, 55, 55, 55, 33, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:19:07,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:19:07,248 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:19:07,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:19:07,248 INFO L82 PathProgramCache]: Analyzing trace with hash -219590315, now seen corresponding path program 22 times [2020-07-21 19:19:07,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:19:07,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979409192] [2020-07-21 19:19:07,249 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:19:08,019 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:19:08,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:19:08,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 1691 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-21 19:19:08,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:19:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 34188 backedges. 7887 proven. 0 refuted. 0 times theorem prover too weak. 26301 trivial. 0 not checked. [2020-07-21 19:19:08,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:19:08,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979409192] [2020-07-21 19:19:08,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:19:08,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 19:19:08,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515359700] [2020-07-21 19:19:08,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 19:19:08,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:19:08,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 19:19:08,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:19:08,269 INFO L87 Difference]: Start difference. First operand 183 states and 290 transitions. Second operand 6 states. [2020-07-21 19:19:08,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:19:08,384 INFO L93 Difference]: Finished difference Result 296 states and 489 transitions. [2020-07-21 19:19:08,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 19:19:08,386 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 761 [2020-07-21 19:19:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:19:08,390 INFO L225 Difference]: With dead ends: 296 [2020-07-21 19:19:08,390 INFO L226 Difference]: Without dead ends: 119 [2020-07-21 19:19:08,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 756 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-07-21 19:19:08,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-07-21 19:19:08,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-07-21 19:19:08,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-07-21 19:19:08,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 164 transitions. [2020-07-21 19:19:08,414 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 164 transitions. Word has length 761 [2020-07-21 19:19:08,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:19:08,415 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 164 transitions. [2020-07-21 19:19:08,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 19:19:08,416 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 164 transitions. [2020-07-21 19:19:08,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 19:19:08,425 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:19:08,426 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:19:08,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:19:08,639 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:19:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:19:08,640 INFO L82 PathProgramCache]: Analyzing trace with hash -193438124, now seen corresponding path program 23 times [2020-07-21 19:19:08,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:19:08,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321757601] [2020-07-21 19:19:08,640 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:19:09,430 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:19:09,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:19:09,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:19:09,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:19:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3182 proven. 1323 refuted. 0 times theorem prover too weak. 28679 trivial. 0 not checked. [2020-07-21 19:19:09,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:19:12,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:13,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:14,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:14,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:14,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:15,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:15,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:15,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:15,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:15,185 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:15,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:15,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:17,252 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 3192 proven. 1392 refuted. 0 times theorem prover too weak. 28600 trivial. 0 not checked. [2020-07-21 19:19:17,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321757601] [2020-07-21 19:19:17,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:19:17,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 20 [2020-07-21 19:19:17,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405146328] [2020-07-21 19:19:17,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:19:17,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:19:17,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:19:17,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:19:17,254 INFO L87 Difference]: Start difference. First operand 119 states and 164 transitions. Second operand 20 states. [2020-07-21 19:19:17,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:19:17,681 INFO L93 Difference]: Finished difference Result 191 states and 265 transitions. [2020-07-21 19:19:17,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:19:17,683 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 750 [2020-07-21 19:19:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:19:17,687 INFO L225 Difference]: With dead ends: 191 [2020-07-21 19:19:17,687 INFO L226 Difference]: Without dead ends: 177 [2020-07-21 19:19:17,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1507 GetRequests, 1464 SyntacticMatches, 17 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:19:17,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-07-21 19:19:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 112. [2020-07-21 19:19:17,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-07-21 19:19:17,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 153 transitions. [2020-07-21 19:19:17,706 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 153 transitions. Word has length 750 [2020-07-21 19:19:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:19:17,707 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 153 transitions. [2020-07-21 19:19:17,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:19:17,707 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 153 transitions. [2020-07-21 19:19:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2020-07-21 19:19:17,716 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:19:17,717 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 89, 54, 54, 54, 54, 54, 54, 54, 35, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:19:17,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:19:17,932 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:19:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:19:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash 19782726, now seen corresponding path program 24 times [2020-07-21 19:19:17,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:19:17,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002960719] [2020-07-21 19:19:17,934 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:19:18,754 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:19:18,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:19:18,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:19:18,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:19:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 805 proven. 4243 refuted. 0 times theorem prover too weak. 28136 trivial. 0 not checked. [2020-07-21 19:19:19,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:19:23,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:25,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:26,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:27,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:27,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:27,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:27,924 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:28,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:28,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:28,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:28,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:28,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:28,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:19:28,845 INFO L134 CoverageAnalysis]: Checked inductivity of 33184 backedges. 819 proven. 4329 refuted. 0 times theorem prover too weak. 28036 trivial. 0 not checked. [2020-07-21 19:19:28,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002960719] [2020-07-21 19:19:28,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:19:28,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 22 [2020-07-21 19:19:28,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420693960] [2020-07-21 19:19:28,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:19:28,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:19:28,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:19:28,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:19:28,847 INFO L87 Difference]: Start difference. First operand 112 states and 153 transitions. Second operand 22 states. [2020-07-21 19:19:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:19:29,414 INFO L93 Difference]: Finished difference Result 238 states and 334 transitions. [2020-07-21 19:19:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:19:29,416 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 750 [2020-07-21 19:19:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:19:29,419 INFO L225 Difference]: With dead ends: 238 [2020-07-21 19:19:29,419 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:19:29,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 1460 SyntacticMatches, 19 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2020-07-21 19:19:29,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:19:29,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:19:29,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:19:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:19:29,427 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 750 [2020-07-21 19:19:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:19:29,427 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:19:29,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:19:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:19:29,428 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:19:29,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:19:29,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:19:30,850 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:19:31,193 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:19:34,318 WARN L193 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:19:35,797 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 445 DAG size of output: 120 [2020-07-21 19:19:37,940 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:19:38,096 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:19:38,704 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:19:38,857 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:19:41,030 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:19:41,622 WARN L193 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:19:43,126 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 455 DAG size of output: 124 [2020-07-21 19:19:43,724 WARN L193 SmtUtils]: Spent 595.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:19:45,218 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 455 DAG size of output: 124 [2020-07-21 19:19:45,810 WARN L193 SmtUtils]: Spent 589.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:19:46,433 WARN L193 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 95 [2020-07-21 19:19:46,587 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:19:47,709 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 416 DAG size of output: 126 [2020-07-21 19:19:49,816 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:19:51,342 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 450 DAG size of output: 148 [2020-07-21 19:19:51,495 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:19:53,481 WARN L193 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:19:53,818 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 302 DAG size of output: 87 [2020-07-21 19:19:55,776 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:19:55,924 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:19:56,602 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 353 DAG size of output: 93 [2020-07-21 19:19:58,000 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 453 DAG size of output: 127 [2020-07-21 19:20:00,042 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:20:00,379 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 82 [2020-07-21 19:20:00,526 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:20:01,090 WARN L193 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:20:02,534 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:20:04,626 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:20:04,776 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:20:05,903 WARN L193 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 416 DAG size of output: 126 [2020-07-21 19:20:07,295 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 454 DAG size of output: 124 [2020-07-21 19:20:07,900 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:20:09,316 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 454 DAG size of output: 124 [2020-07-21 19:20:11,359 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:20:11,535 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 65 [2020-07-21 19:20:12,944 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 453 DAG size of output: 127 [2020-07-21 19:20:13,226 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 305 DAG size of output: 68 [2020-07-21 19:20:13,372 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:20:15,396 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:20:15,736 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 303 DAG size of output: 82 [2020-07-21 19:20:17,124 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 452 DAG size of output: 123 [2020-07-21 19:20:17,270 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:20:18,358 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 415 DAG size of output: 126 [2020-07-21 19:20:20,327 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 517 DAG size of output: 178 [2020-07-21 19:20:21,695 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:20:23,094 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:20:25,036 WARN L193 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 517 DAG size of output: 178 [2020-07-21 19:20:25,604 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:20:25,777 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 65 [2020-07-21 19:20:25,922 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:20:26,092 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:20:28,043 WARN L193 SmtUtils]: Spent 1.95 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:20:28,624 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:20:30,480 WARN L193 SmtUtils]: Spent 1.85 s on a formula simplification. DAG size of input: 452 DAG size of output: 123 [2020-07-21 19:20:31,870 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:20:32,054 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 64 [2020-07-21 19:20:33,437 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:20:34,817 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:20:36,792 WARN L193 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:20:37,140 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 304 DAG size of output: 82 [2020-07-21 19:20:37,721 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:20:39,119 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 451 DAG size of output: 123 [2020-07-21 19:20:39,280 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:20:39,429 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:20:39,987 WARN L193 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 93 [2020-07-21 19:20:41,905 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 517 DAG size of output: 178 [2020-07-21 19:20:43,907 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 517 DAG size of output: 178 [2020-07-21 19:20:45,348 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 451 DAG size of output: 123 [2020-07-21 19:20:45,505 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:20:46,107 WARN L193 SmtUtils]: Spent 599.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:20:47,560 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:20:49,017 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:20:51,099 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:20:51,251 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:20:51,841 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:20:53,898 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:20:55,363 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:20:56,812 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:20:58,828 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 522 DAG size of output: 182 [2020-07-21 19:20:58,985 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:21:00,660 WARN L193 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 494 DAG size of output: 167 [2020-07-21 19:21:02,708 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 517 DAG size of output: 178 [2020-07-21 19:21:03,294 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 93 [2020-07-21 19:21:05,318 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 522 DAG size of output: 182 [2020-07-21 19:21:05,477 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:21:06,076 WARN L193 SmtUtils]: Spent 596.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 93 [2020-07-21 19:21:07,742 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 492 DAG size of output: 167 [2020-07-21 19:21:09,805 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:21:09,973 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:21:10,576 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:21:12,070 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:21:13,048 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 121 [2020-07-21 19:21:15,133 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:21:15,735 WARN L193 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:21:17,169 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:21:19,208 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 517 DAG size of output: 178 [2020-07-21 19:21:19,797 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 93 [2020-07-21 19:21:20,440 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 357 DAG size of output: 105 [2020-07-21 19:21:21,887 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:21:23,927 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 522 DAG size of output: 182 [2020-07-21 19:21:24,095 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 64 [2020-07-21 19:21:26,141 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 517 DAG size of output: 178 [2020-07-21 19:21:26,741 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 104 [2020-07-21 19:21:27,378 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 93 [2020-07-21 19:21:28,810 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:21:29,781 WARN L193 SmtUtils]: Spent 969.00 ms on a formula simplification. DAG size of input: 401 DAG size of output: 121 [2020-07-21 19:21:29,936 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:21:31,982 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification. DAG size of input: 522 DAG size of output: 182 [2020-07-21 19:21:34,049 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 525 DAG size of output: 180 [2020-07-21 19:21:34,634 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 348 DAG size of output: 93 [2020-07-21 19:21:34,788 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:21:34,960 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 64 [2020-07-21 19:21:37,012 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 525 DAG size of output: 180 [2020-07-21 19:21:37,991 WARN L193 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 400 DAG size of output: 121 [2020-07-21 19:21:38,600 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 104 [2020-07-21 19:21:39,330 WARN L193 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 382 DAG size of output: 110 [2020-07-21 19:21:40,737 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 445 DAG size of output: 120 [2020-07-21 19:21:41,370 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 93 [2020-07-21 19:21:42,769 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 445 DAG size of output: 120 [2020-07-21 19:21:42,926 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:21:43,098 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 64 [2020-07-21 19:21:44,514 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 452 DAG size of output: 121 [2020-07-21 19:21:45,136 WARN L193 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 104 [2020-07-21 19:21:46,556 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification. DAG size of input: 445 DAG size of output: 120 [2020-07-21 19:21:48,584 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 525 DAG size of output: 180 [2020-07-21 19:21:50,612 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 522 DAG size of output: 182 [2020-07-21 19:21:50,767 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:21:51,376 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 104 [2020-07-21 19:21:51,550 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 63 [2020-07-21 19:21:51,705 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:21:52,336 WARN L193 SmtUtils]: Spent 629.00 ms on a formula simplification. DAG size of input: 360 DAG size of output: 93 [2020-07-21 19:21:54,395 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 525 DAG size of output: 180 [2020-07-21 19:21:57,002 WARN L193 SmtUtils]: Spent 2.60 s on a formula simplification. DAG size of input: 530 DAG size of output: 144 [2020-07-21 19:21:58,359 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 445 DAG size of output: 120 [2020-07-21 19:21:58,516 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:21:59,119 WARN L193 SmtUtils]: Spent 600.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:22:00,498 WARN L193 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 445 DAG size of output: 120 [2020-07-21 19:22:02,529 WARN L193 SmtUtils]: Spent 2.03 s on a formula simplification. DAG size of input: 525 DAG size of output: 181 [2020-07-21 19:22:03,193 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 428 DAG size of output: 142 [2020-07-21 19:22:05,251 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 525 DAG size of output: 181 [2020-07-21 19:22:07,306 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:22:07,462 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:22:09,539 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:22:10,146 WARN L193 SmtUtils]: Spent 604.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:22:10,300 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:22:12,389 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 523 DAG size of output: 181 [2020-07-21 19:22:13,866 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 450 DAG size of output: 148 [2020-07-21 19:22:14,472 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 352 DAG size of output: 93 [2020-07-21 19:22:15,090 WARN L193 SmtUtils]: Spent 616.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 95 [2020-07-21 19:22:16,570 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 450 DAG size of output: 148 [2020-07-21 19:22:18,659 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 524 DAG size of output: 178 [2020-07-21 19:22:18,815 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 63 [2020-07-21 19:22:19,300 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 323 DAG size of output: 89 [2020-07-21 19:22:24,773 WARN L193 SmtUtils]: Spent 5.39 s on a formula simplification. DAG size of input: 336 DAG size of output: 52 [2020-07-21 19:22:24,778 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-21 19:22:24,779 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true [2020-07-21 19:22:24,779 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|)) [2020-07-21 19:22:24,779 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-07-21 19:22:24,780 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse2 (= 1 |fibonacci_#t~ret0|))) (let ((.cse0 (and .cse2 (<= |fibonacci_#in~n| 2))) (.cse1 (and .cse2 (<= 3 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 3)))) (and (<= |fibonacci_#in~n| fibonacci_~n) (or .cse0 .cse1 (<= 4 |fibonacci_#in~n|)) (or (<= |fibonacci_#in~n| 8) (= 21 |fibonacci_#t~ret0|) (<= 10 |fibonacci_#in~n|)) (<= 2 |fibonacci_#in~n|) (or .cse0 (and (= 2 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 4)) (<= 9 |fibonacci_#in~n|) (and (<= |fibonacci_#in~n| 7) (= 8 |fibonacci_#t~ret0|) (<= 7 |fibonacci_#in~n|)) (and (<= |fibonacci_#in~n| 6) (<= 6 |fibonacci_#in~n|) (= 5 |fibonacci_#t~ret0|)) .cse1 (and (= 13 |fibonacci_#t~ret0|) (<= 8 |fibonacci_#in~n|)) (and (= 3 |fibonacci_#t~ret0|) (<= |fibonacci_#in~n| 5) (<= 5 |fibonacci_#in~n|))) (<= fibonacci_~n |fibonacci_#in~n|)))) [2020-07-21 19:22:24,780 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-21 19:22:24,780 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed. [2020-07-21 19:22:24,780 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-07-21 19:22:24,780 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed. [2020-07-21 19:22:24,780 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-21 19:22:24,780 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:22:24,780 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-21 19:22:24,780 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-21 19:22:24,780 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-21 19:22:24,781 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-21 19:22:24,782 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 31) no Hoare annotation was computed. [2020-07-21 19:22:24,782 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-07-21 19:22:24,782 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 33) the Hoare annotation is: true [2020-07-21 19:22:24,782 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 33) no Hoare annotation was computed. [2020-07-21 19:22:24,782 INFO L268 CegarLoopResult]: For program point L28(lines 28 32) no Hoare annotation was computed. [2020-07-21 19:22:24,783 INFO L264 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~x~0 9) (<= 9 main_~x~0)) [2020-07-21 19:22:24,783 INFO L268 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-07-21 19:22:24,783 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 33) no Hoare annotation was computed. [2020-07-21 19:22:24,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 07:22:24 BoogieIcfgContainer [2020-07-21 19:22:24,790 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 19:22:24,791 INFO L168 Benchmark]: Toolchain (without parser) took 378274.63 ms. Allocated memory was 138.9 MB in the beginning and 2.8 GB in the end (delta: 2.7 GB). Free memory was 103.7 MB in the beginning and 1.2 GB in the end (delta: -1.1 GB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2020-07-21 19:22:24,791 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 19:22:24,791 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.87 ms. Allocated memory is still 138.9 MB. Free memory was 103.3 MB in the beginning and 93.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-07-21 19:22:24,792 INFO L168 Benchmark]: Boogie Preprocessor took 22.80 ms. Allocated memory is still 138.9 MB. Free memory was 93.6 MB in the beginning and 92.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-21 19:22:24,793 INFO L168 Benchmark]: RCFGBuilder took 314.60 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.2 MB in the beginning and 170.4 MB in the end (delta: -78.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-21 19:22:24,793 INFO L168 Benchmark]: TraceAbstraction took 377705.95 ms. Allocated memory was 202.9 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 169.8 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. [2020-07-21 19:22:24,796 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 138.9 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 224.87 ms. Allocated memory is still 138.9 MB. Free memory was 103.3 MB in the beginning and 93.6 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.80 ms. Allocated memory is still 138.9 MB. Free memory was 93.6 MB in the beginning and 92.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 314.60 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 92.2 MB in the beginning and 170.4 MB in the end (delta: -78.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 377705.95 ms. Allocated memory was 202.9 MB in the beginning and 2.8 GB in the end (delta: 2.6 GB). Free memory was 169.8 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 2.7 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 31]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 202.4s, OverallIterations: 34, TraceHistogramMax: 245, AutomataDifference: 11.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 175.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 938 SDtfs, 1250 SDslu, 4846 SDs, 0 SdLazy, 6024 SolverSat, 2212 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 37777 GetRequests, 36636 SyntacticMatches, 412 SemanticMatches, 729 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4265 ImplicationChecksByTransitivity, 12.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=183occurred in iteration=31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 34 MinimizatonAttempts, 732 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 476 PreInvPairs, 27136 NumberOfFragments, 128 HoareAnnotationTreeSize, 476 FomulaSimplifications, 1122076481298 FormulaSimplificationTreeSizeReduction, 169.6s HoareSimplificationTime, 8 FomulaSimplificationsInter, 32426458 FormulaSimplificationTreeSizeReductionInter, 5.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 4.9s SatisfiabilityAnalysisTime, 168.5s InterpolantComputationTime, 19191 NumberOfCodeBlocks, 19178 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 37529 ConstructedInterpolants, 0 QuantifiedInterpolants, 38910919 SizeOfPredicates, 233 NumberOfNonLiveVariables, 42654 ConjunctsInSsa, 913 ConjunctsInUnsatCore, 65 InterpolantComputations, 3 PerfectInterpolantSequences, 1692743/1871880 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...