/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 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:33:18,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:33:18,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:33:18,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:33:18,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:33:18,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:33:18,023 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:33:18,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:33:18,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:33:18,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:33:18,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:33:18,030 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:33:18,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:33:18,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:33:18,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:33:18,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:33:18,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:33:18,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:33:18,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:33:18,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:33:18,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:33:18,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:33:18,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:33:18,043 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:33:18,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 22:33:18,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 22:33:18,069 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:33:18,069 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:33:18,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:33:18,071 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:33:18,071 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:33:18,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:33:18,071 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:33:18,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:33:18,072 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:33:18,072 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:33:18,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:33:18,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:33:18,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:33:18,073 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:33:18,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:33:18,073 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:33:18,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:33:18,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:33:18,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:33:18,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:33:18,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:33:18,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:33:18,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:33:18,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:33:18,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:33:18,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:33:18,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:18,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:33:18,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:33:18,076 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 -> 4 [2020-07-20 22:33:18,350 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:33:18,367 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:33:18,371 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:33:18,373 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:33:18,375 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:33:18,375 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-07-20 22:33:18,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45776e17/b8cbd0e679aa448a973909d65b0694a4/FLAGc2c1662ad [2020-07-20 22:33:18,922 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:33:18,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.c.i.v+cfa-reducer.c [2020-07-20 22:33:18,928 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45776e17/b8cbd0e679aa448a973909d65b0694a4/FLAGc2c1662ad [2020-07-20 22:33:19,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f45776e17/b8cbd0e679aa448a973909d65b0694a4 [2020-07-20 22:33:19,284 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:33:19,287 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:33:19,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:33:19,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:33:19,291 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:33:19,292 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:33:19" (1/1) ... [2020-07-20 22:33:19,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24dcfc9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:19, skipping insertion in model container [2020-07-20 22:33:19,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:33:19" (1/1) ... [2020-07-20 22:33:19,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:33:19,321 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:33:19,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:33:19,518 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:33:19,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:33:19,547 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:33:19,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:19 WrapperNode [2020-07-20 22:33:19,547 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:33:19,548 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:33:19,548 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:33:19,548 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:33:19,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:19" (1/1) ... [2020-07-20 22:33:19,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:19" (1/1) ... [2020-07-20 22:33:19,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:19" (1/1) ... [2020-07-20 22:33:19,654 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:19" (1/1) ... [2020-07-20 22:33:19,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:19" (1/1) ... [2020-07-20 22:33:19,662 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:19" (1/1) ... [2020-07-20 22:33:19,668 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:19" (1/1) ... [2020-07-20 22:33:19,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:33:19,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:33:19,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:33:19,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:33:19,672 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:33:19,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:33:19,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:33:19,727 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 22:33:19,727 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:33:19,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:33:19,728 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 22:33:19,728 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 22:33:19,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 22:33:19,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:33:19,728 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:33:19,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:33:19,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:33:19,909 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:33:19,909 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 22:33:19,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:33:19 BoogieIcfgContainer [2020-07-20 22:33:19,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:33:19,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:33:19,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:33:19,917 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:33:19,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:33:19" (1/3) ... [2020-07-20 22:33:19,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bf4f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:33:19, skipping insertion in model container [2020-07-20 22:33:19,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:33:19" (2/3) ... [2020-07-20 22:33:19,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54bf4f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:33:19, skipping insertion in model container [2020-07-20 22:33:19,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:33:19" (3/3) ... [2020-07-20 22:33:19,921 INFO L109 eAbstractionObserver]: Analyzing ICFG jm2006.c.i.v+cfa-reducer.c [2020-07-20 22:33:19,931 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:33:19,937 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:33:19,950 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:33:19,973 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:33:19,973 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:33:19,973 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:33:19,973 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:33:19,974 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:33:19,974 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:33:19,974 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:33:19,974 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:33:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-07-20 22:33:19,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-20 22:33:19,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:19,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:19,998 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:20,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1434042835, now seen corresponding path program 1 times [2020-07-20 22:33:20,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:20,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69892195] [2020-07-20 22:33:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:20,094 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:33:20,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:20,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 22:33:20,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:20,202 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 22:33:20,207 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-20 22:33:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:20,231 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:33:20,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69892195] [2020-07-20 22:33:20,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:33:20,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 22:33:20,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506213764] [2020-07-20 22:33:20,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 22:33:20,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:20,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 22:33:20,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 22:33:20,252 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-07-20 22:33:20,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:20,375 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-07-20 22:33:20,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 22:33:20,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-20 22:33:20,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:20,387 INFO L225 Difference]: With dead ends: 30 [2020-07-20 22:33:20,387 INFO L226 Difference]: Without dead ends: 14 [2020-07-20 22:33:20,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:33:20,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-07-20 22:33:20,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-07-20 22:33:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-07-20 22:33:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-07-20 22:33:20,429 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-07-20 22:33:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:20,429 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-07-20 22:33:20,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 22:33:20,430 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-07-20 22:33:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 22:33:20,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:20,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:20,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:20,639 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:20,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:20,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1507594220, now seen corresponding path program 1 times [2020-07-20 22:33:20,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:20,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310446081] [2020-07-20 22:33:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:20,672 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:33:20,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:20,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 22:33:20,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:20,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:20,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:20,759 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:33:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:20,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310446081] [2020-07-20 22:33:20,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:33:20,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-07-20 22:33:20,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286983726] [2020-07-20 22:33:20,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 22:33:20,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:20,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 22:33:20,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 22:33:20,826 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 9 states. [2020-07-20 22:33:21,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:21,008 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-07-20 22:33:21,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 22:33:21,009 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-07-20 22:33:21,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:21,010 INFO L225 Difference]: With dead ends: 23 [2020-07-20 22:33:21,010 INFO L226 Difference]: Without dead ends: 17 [2020-07-20 22:33:21,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-07-20 22:33:21,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-07-20 22:33:21,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-07-20 22:33:21,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-07-20 22:33:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-07-20 22:33:21,017 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 13 [2020-07-20 22:33:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:21,018 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-07-20 22:33:21,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 22:33:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-07-20 22:33:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-20 22:33:21,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:21,019 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:21,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:21,234 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:21,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:21,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2102853613, now seen corresponding path program 2 times [2020-07-20 22:33:21,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:21,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758066550] [2020-07-20 22:33:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:21,289 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:33:21,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:21,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 27 conjunts are in the unsatisfiable core [2020-07-20 22:33:21,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:21,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:21,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:33:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:21,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758066550] [2020-07-20 22:33:21,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:33:21,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-07-20 22:33:21,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867341076] [2020-07-20 22:33:21,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 22:33:21,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:21,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 22:33:21,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-07-20 22:33:21,581 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 15 states. [2020-07-20 22:33:22,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:22,030 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2020-07-20 22:33:22,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 22:33:22,031 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2020-07-20 22:33:22,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:22,032 INFO L225 Difference]: With dead ends: 29 [2020-07-20 22:33:22,032 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 22:33:22,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-07-20 22:33:22,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 22:33:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-20 22:33:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-20 22:33:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-07-20 22:33:22,040 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2020-07-20 22:33:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:22,040 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-07-20 22:33:22,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 22:33:22,041 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-07-20 22:33:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 22:33:22,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:22,042 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:22,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:22,243 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:22,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:22,244 INFO L82 PathProgramCache]: Analyzing trace with hash 906772109, now seen corresponding path program 3 times [2020-07-20 22:33:22,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:22,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062265546] [2020-07-20 22:33:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:22,292 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:33:22,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:22,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 51 conjunts are in the unsatisfiable core [2020-07-20 22:33:22,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:22,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:22,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:33:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:22,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062265546] [2020-07-20 22:33:22,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:33:22,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2020-07-20 22:33:22,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440984161] [2020-07-20 22:33:22,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 22:33:22,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:22,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 22:33:22,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2020-07-20 22:33:22,972 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 27 states. [2020-07-20 22:33:23,546 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-07-20 22:33:23,828 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-07-20 22:33:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:24,522 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 22:33:24,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-20 22:33:24,525 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 22 [2020-07-20 22:33:24,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:24,526 INFO L225 Difference]: With dead ends: 41 [2020-07-20 22:33:24,526 INFO L226 Difference]: Without dead ends: 35 [2020-07-20 22:33:24,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=550, Invalid=1172, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 22:33:24,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-20 22:33:24,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-20 22:33:24,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 22:33:24,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-07-20 22:33:24,544 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 22 [2020-07-20 22:33:24,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:24,545 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-07-20 22:33:24,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 22:33:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-07-20 22:33:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-20 22:33:24,547 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:24,547 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:24,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:24,761 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:24,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:24,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1007922227, now seen corresponding path program 4 times [2020-07-20 22:33:24,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:24,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338478597] [2020-07-20 22:33:24,764 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:24,828 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:33:24,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:24,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 99 conjunts are in the unsatisfiable core [2020-07-20 22:33:24,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:25,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:25,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:33:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:26,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338478597] [2020-07-20 22:33:26,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:33:26,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 51 [2020-07-20 22:33:26,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360218129] [2020-07-20 22:33:26,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-20 22:33:26,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:26,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-20 22:33:26,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=631, Invalid=1919, Unknown=0, NotChecked=0, Total=2550 [2020-07-20 22:33:26,760 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 51 states. [2020-07-20 22:33:27,591 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-20 22:33:27,955 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-20 22:33:28,296 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 98 [2020-07-20 22:33:28,622 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 22:33:28,965 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 100 [2020-07-20 22:33:29,261 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-20 22:33:29,531 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-20 22:33:29,801 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 22:33:30,071 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 22:33:30,319 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-20 22:33:33,110 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-20 22:33:33,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:33:33,119 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2020-07-20 22:33:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-20 22:33:33,121 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 34 [2020-07-20 22:33:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:33:33,123 INFO L225 Difference]: With dead ends: 65 [2020-07-20 22:33:33,123 INFO L226 Difference]: Without dead ends: 59 [2020-07-20 22:33:33,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1942, Invalid=4064, Unknown=0, NotChecked=0, Total=6006 [2020-07-20 22:33:33,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-20 22:33:33,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-20 22:33:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-20 22:33:33,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-07-20 22:33:33,140 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 34 [2020-07-20 22:33:33,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:33:33,140 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-07-20 22:33:33,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-20 22:33:33,140 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-07-20 22:33:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-20 22:33:33,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:33:33,142 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:33:33,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:33,356 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:33:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:33:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash -765796787, now seen corresponding path program 5 times [2020-07-20 22:33:33,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:33:33,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313587691] [2020-07-20 22:33:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:33:33,471 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:33:33,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:33:33,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 195 conjunts are in the unsatisfiable core [2020-07-20 22:33:33,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:33:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:35,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:33:35,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:33:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:33:40,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313587691] [2020-07-20 22:33:40,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:33:40,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 99 [2020-07-20 22:33:40,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715013534] [2020-07-20 22:33:40,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-07-20 22:33:40,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:33:40,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-07-20 22:33:40,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2407, Invalid=7295, Unknown=0, NotChecked=0, Total=9702 [2020-07-20 22:33:40,653 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 99 states. [2020-07-20 22:33:43,678 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2020-07-20 22:33:44,913 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-20 22:33:45,772 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 194 [2020-07-20 22:33:47,007 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 232 [2020-07-20 22:33:47,905 WARN L193 SmtUtils]: Spent 725.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 196 [2020-07-20 22:33:49,032 WARN L193 SmtUtils]: Spent 391.00 ms on a formula simplification that was a NOOP. DAG size: 227 [2020-07-20 22:33:50,147 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 222 [2020-07-20 22:33:51,219 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 217 [2020-07-20 22:33:52,286 WARN L193 SmtUtils]: Spent 356.00 ms on a formula simplification that was a NOOP. DAG size: 212 [2020-07-20 22:33:53,340 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 207 [2020-07-20 22:33:54,379 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 202 [2020-07-20 22:33:55,415 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 197 [2020-07-20 22:33:56,396 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 192 [2020-07-20 22:33:57,344 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 22:33:58,299 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2020-07-20 22:33:59,190 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-07-20 22:34:00,066 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-07-20 22:34:00,917 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-07-20 22:34:01,758 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-07-20 22:34:02,586 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-07-20 22:34:03,391 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-07-20 22:34:04,184 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-07-20 22:34:04,935 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 22:34:05,679 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-07-20 22:34:06,439 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-07-20 22:34:07,137 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-07-20 22:34:07,830 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-07-20 22:34:08,513 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-07-20 22:34:09,164 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-07-20 22:34:09,793 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-07-20 22:34:10,396 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-20 22:34:11,011 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-07-20 22:34:11,580 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-20 22:34:12,113 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2020-07-20 22:34:12,628 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 22:34:13,130 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 22:34:19,114 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 237 [2020-07-20 22:34:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:34:19,129 INFO L93 Difference]: Finished difference Result 113 states and 160 transitions. [2020-07-20 22:34:19,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-07-20 22:34:19,130 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 58 [2020-07-20 22:34:19,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:34:19,131 INFO L225 Difference]: With dead ends: 113 [2020-07-20 22:34:19,131 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 22:34:19,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=7318, Invalid=15032, Unknown=0, NotChecked=0, Total=22350 [2020-07-20 22:34:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 22:34:19,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-07-20 22:34:19,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-07-20 22:34:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-07-20 22:34:19,161 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 58 [2020-07-20 22:34:19,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:34:19,162 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-07-20 22:34:19,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-07-20 22:34:19,162 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-07-20 22:34:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-07-20 22:34:19,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:34:19,165 INFO L422 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:34:19,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:34:19,367 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:34:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:34:19,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1152480077, now seen corresponding path program 6 times [2020-07-20 22:34:19,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:34:19,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890284320] [2020-07-20 22:34:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:34:19,597 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 22:34:19,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:34:19,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 387 conjunts are in the unsatisfiable core [2020-07-20 22:34:19,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:34:28,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:34:28,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 22:34:28,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 22:34:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 22:34:53,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890284320] [2020-07-20 22:34:53,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 22:34:53,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 195 [2020-07-20 22:34:53,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092616013] [2020-07-20 22:34:53,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 195 states [2020-07-20 22:34:53,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:34:53,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2020-07-20 22:34:53,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9415, Invalid=28415, Unknown=0, NotChecked=0, Total=37830 [2020-07-20 22:34:53,208 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 195 states. [2020-07-20 22:35:08,808 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 482 [2020-07-20 22:35:16,208 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 477 [2020-07-20 22:35:19,161 WARN L193 SmtUtils]: Spent 2.41 s on a formula simplification. DAG size of input: 480 DAG size of output: 386 [2020-07-20 22:35:26,953 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 472 [2020-07-20 22:35:30,076 WARN L193 SmtUtils]: Spent 2.53 s on a formula simplification. DAG size of input: 482 DAG size of output: 388 [2020-07-20 22:35:37,940 WARN L193 SmtUtils]: Spent 1.55 s on a formula simplification that was a NOOP. DAG size: 467 [2020-07-20 22:35:46,171 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 462 [2020-07-20 22:35:54,481 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 457 [2020-07-20 22:36:02,984 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 452 [2020-07-20 22:36:11,542 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 447 [2020-07-20 22:36:20,706 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 442 [2020-07-20 22:36:29,954 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification that was a NOOP. DAG size: 437 [2020-07-20 22:36:39,507 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 432 [2020-07-20 22:36:49,428 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 427 [2020-07-20 22:36:59,926 WARN L193 SmtUtils]: Spent 1.86 s on a formula simplification that was a NOOP. DAG size: 422 [2020-07-20 22:37:10,530 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 417 [2020-07-20 22:37:22,134 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 412 [2020-07-20 22:37:33,762 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 407 [2020-07-20 22:37:45,548 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 402 [2020-07-20 22:37:57,467 WARN L193 SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 397 [2020-07-20 22:38:09,346 WARN L193 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 392 [2020-07-20 22:38:21,491 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 387 [2020-07-20 22:38:34,102 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification that was a NOOP. DAG size: 382 [2020-07-20 22:38:46,691 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 377 [2020-07-20 22:38:59,726 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification that was a NOOP. DAG size: 372 [2020-07-20 22:39:13,188 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 367 [2020-07-20 22:39:26,728 WARN L193 SmtUtils]: Spent 2.26 s on a formula simplification that was a NOOP. DAG size: 362 [2020-07-20 22:39:40,308 WARN L193 SmtUtils]: Spent 2.25 s on a formula simplification that was a NOOP. DAG size: 357 [2020-07-20 22:39:54,288 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 352 [2020-07-20 22:40:08,889 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 347 [2020-07-20 22:40:23,417 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 342 [2020-07-20 22:40:37,718 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 337 [2020-07-20 22:40:52,120 WARN L193 SmtUtils]: Spent 2.35 s on a formula simplification that was a NOOP. DAG size: 332 [2020-07-20 22:41:07,284 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification that was a NOOP. DAG size: 327 [2020-07-20 22:41:22,289 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification that was a NOOP. DAG size: 322 [2020-07-20 22:41:37,716 WARN L193 SmtUtils]: Spent 2.32 s on a formula simplification that was a NOOP. DAG size: 317 [2020-07-20 22:41:53,288 WARN L193 SmtUtils]: Spent 2.28 s on a formula simplification that was a NOOP. DAG size: 312 [2020-07-20 22:42:05,833 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 307 [2020-07-20 22:42:17,158 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 302 [2020-07-20 22:42:28,168 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification that was a NOOP. DAG size: 297 [2020-07-20 22:42:39,223 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 292 [2020-07-20 22:42:50,225 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 287 [2020-07-20 22:43:01,560 WARN L193 SmtUtils]: Spent 1.71 s on a formula simplification that was a NOOP. DAG size: 282 [2020-07-20 22:43:12,624 WARN L193 SmtUtils]: Spent 1.62 s on a formula simplification that was a NOOP. DAG size: 277 [2020-07-20 22:43:23,451 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 272 [2020-07-20 22:43:34,669 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 267 [2020-07-20 22:43:46,441 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 262 [2020-07-20 22:43:58,145 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 257 [2020-07-20 22:44:09,797 WARN L193 SmtUtils]: Spent 1.68 s on a formula simplification that was a NOOP. DAG size: 252 [2020-07-20 22:44:21,327 WARN L193 SmtUtils]: Spent 1.63 s on a formula simplification that was a NOOP. DAG size: 247 [2020-07-20 22:44:32,600 WARN L193 SmtUtils]: Spent 1.60 s on a formula simplification that was a NOOP. DAG size: 242 [2020-07-20 22:44:43,951 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 237 [2020-07-20 22:44:54,011 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 232 [2020-07-20 22:45:03,917 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 227 [2020-07-20 22:45:13,762 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 222 [2020-07-20 22:45:23,405 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 217 [2020-07-20 22:45:32,751 WARN L193 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 212 [2020-07-20 22:45:41,910 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 207 [2020-07-20 22:45:50,882 WARN L193 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 202 [2020-07-20 22:45:59,780 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 197 [2020-07-20 22:46:08,881 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 192 [2020-07-20 22:46:17,908 WARN L193 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 187 [2020-07-20 22:46:26,996 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 182 [2020-07-20 22:46:36,212 WARN L193 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 177 [2020-07-20 22:46:45,289 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 172 [2020-07-20 22:46:54,238 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 167 [2020-07-20 22:47:03,082 WARN L193 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 162 [2020-07-20 22:47:11,760 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 157 [2020-07-20 22:47:20,285 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 152 [2020-07-20 22:47:28,843 WARN L193 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 147 [2020-07-20 22:47:37,288 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 142 [2020-07-20 22:47:45,457 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 137