/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-simple/fibo_2calls_20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:31:30,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:31:30,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:31:30,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:31:31,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:31:31,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:31:31,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:31:31,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:31:31,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:31:31,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:31:31,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:31:31,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:31:31,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:31:31,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:31:31,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:31:31,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:31:31,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:31:31,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:31:31,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:31:31,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:31:31,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:31:31,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:31:31,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:31:31,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:31:31,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:31:31,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:31:31,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:31:31,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:31:31,036 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 19:31:31,064 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:31:31,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:31:31,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:31:31,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:31:31,066 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:31:31,066 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:31:31,067 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:31:31,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:31:31,067 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:31:31,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:31:31,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:31:31,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:31:31,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:31:31,068 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:31:31,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:31:31,069 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:31:31,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:31:31,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:31:31,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:31:31,069 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:31:31,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:31:31,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:31:31,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:31:31,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:31:31,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:31:31,071 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:31:31,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:31,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:31:31,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:31:31,071 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 19:31:31,369 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:31:31,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:31:31,385 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:31:31,387 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:31:31,387 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:31:31,388 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c [2020-07-21 19:31:31,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d41aa611/286bb11fe0924ff6b4f360c731e79664/FLAGc139c3d9f [2020-07-21 19:31:31,892 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:31:31,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_20-1.c [2020-07-21 19:31:31,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d41aa611/286bb11fe0924ff6b4f360c731e79664/FLAGc139c3d9f [2020-07-21 19:31:32,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d41aa611/286bb11fe0924ff6b4f360c731e79664 [2020-07-21 19:31:32,292 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:31:32,294 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:31:32,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:31:32,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:31:32,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:31:32,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:31:32" (1/1) ... [2020-07-21 19:31:32,304 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@412e4f7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:32, skipping insertion in model container [2020-07-21 19:31:32,304 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:31:32" (1/1) ... [2020-07-21 19:31:32,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:31:32,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:31:32,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:31:32,575 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:31:32,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:31:32,611 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:31:32,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:32 WrapperNode [2020-07-21 19:31:32,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:31:32,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:31:32,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:31:32,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:31:32,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:32" (1/1) ... [2020-07-21 19:31:32,629 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:32" (1/1) ... [2020-07-21 19:31:32,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:32" (1/1) ... [2020-07-21 19:31:32,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:32" (1/1) ... [2020-07-21 19:31:32,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:32" (1/1) ... [2020-07-21 19:31:32,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:32" (1/1) ... [2020-07-21 19:31:32,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:32" (1/1) ... [2020-07-21 19:31:32,648 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:31:32,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:31:32,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:31:32,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:31:32,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:32" (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 19:31:32,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:31:32,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:31:32,794 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 19:31:32,794 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 19:31:32,794 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:31:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:31:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:31:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 19:31:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 19:31:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:31:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:31:32,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:31:32,984 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:31:32,984 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:31:32,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:31:32 BoogieIcfgContainer [2020-07-21 19:31:32,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:31:32,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:31:32,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:31:32,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:31:32,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:31:32" (1/3) ... [2020-07-21 19:31:32,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444f1254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:31:32, skipping insertion in model container [2020-07-21 19:31:32,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:31:32" (2/3) ... [2020-07-21 19:31:32,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444f1254 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:31:32, skipping insertion in model container [2020-07-21 19:31:32,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:31:32" (3/3) ... [2020-07-21 19:31:32,997 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_20-1.c [2020-07-21 19:31:33,007 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:31:33,015 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:31:33,032 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:31:33,062 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:31:33,062 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:31:33,062 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:31:33,062 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:31:33,062 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:31:33,063 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:31:33,063 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:31:33,063 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:31:33,085 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 19:31:33,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:31:33,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:33,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:33,094 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:33,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 19:31:33,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:33,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374087682] [2020-07-21 19:31:33,118 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 19:31:33,183 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:31:33,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:33,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:31:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:33,273 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 19:31:33,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:31:33,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374087682] [2020-07-21 19:31:33,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:31:33,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:31:33,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527255673] [2020-07-21 19:31:33,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:31:33,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:33,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:31:33,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:31:33,298 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 19:31:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:33,410 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 19:31:33,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:31:33,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:31:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:33,430 INFO L225 Difference]: With dead ends: 44 [2020-07-21 19:31:33,430 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 19:31:33,437 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 19:31:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 19:31:33,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 19:31:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:31:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 19:31:33,484 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 19:31:33,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:33,484 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 19:31:33,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:31:33,485 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 19:31:33,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 19:31:33,487 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:33,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:33,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:33,702 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:33,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:33,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 19:31:33,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:33,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076992224] [2020-07-21 19:31:33,705 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 19:31:33,726 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:31:33,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:33,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:31:33,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:33,766 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 19:31:33,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:31:33,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076992224] [2020-07-21 19:31:33,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:31:33,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:31:33,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172387917] [2020-07-21 19:31:33,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:31:33,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:33,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:31:33,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:31:33,776 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 19:31:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:33,849 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 19:31:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:31:33,850 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 19:31:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:33,851 INFO L225 Difference]: With dead ends: 36 [2020-07-21 19:31:33,851 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 19:31:33,853 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 19:31:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 19:31:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 19:31:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:31:33,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 19:31:33,862 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 19:31:33,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:33,863 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 19:31:33,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:31:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 19:31:33,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 19:31:33,865 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:33,865 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:34,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:34,081 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:34,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:34,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 19:31:34,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:34,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893580507] [2020-07-21 19:31:34,084 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 19:31:34,111 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:31:34,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:34,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:31:34,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:31:34,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:34,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:34,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:34,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:31:34,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893580507] [2020-07-21 19:31:34,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:34,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 19:31:34,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956186043] [2020-07-21 19:31:34,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:31:34,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:34,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:31:34,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:31:34,406 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 19:31:34,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:34,512 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 19:31:34,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:31:34,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 19:31:34,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:34,515 INFO L225 Difference]: With dead ends: 41 [2020-07-21 19:31:34,515 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 19:31:34,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:31:34,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 19:31:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 19:31:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 19:31:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 19:31:34,525 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 19:31:34,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:34,525 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 19:31:34,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:31:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 19:31:34,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 19:31:34,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:34,528 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:34,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:34,730 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:34,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:34,731 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 19:31:34,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:34,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582763185] [2020-07-21 19:31:34,732 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 19:31:34,763 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:31:34,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:34,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:31:34,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:31:34,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:34,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:34,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:31:34,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582763185] [2020-07-21 19:31:34,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:34,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 19:31:34,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065971042] [2020-07-21 19:31:34,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:31:34,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:34,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:31:34,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:31:34,985 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 19:31:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:35,091 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 19:31:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:31:35,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 19:31:35,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:35,093 INFO L225 Difference]: With dead ends: 46 [2020-07-21 19:31:35,093 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 19:31:35,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:31:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 19:31:35,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 19:31:35,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 19:31:35,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 19:31:35,103 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 19:31:35,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:35,103 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 19:31:35,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:31:35,104 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 19:31:35,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 19:31:35,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:35,106 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:35,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:35,319 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:35,320 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 19:31:35,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:35,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115139927] [2020-07-21 19:31:35,321 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 19:31:35,357 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:35,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:35,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:31:35,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 19:31:35,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:35,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:35,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:35,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:31:35,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115139927] [2020-07-21 19:31:35,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:35,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 19:31:35,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497476752] [2020-07-21 19:31:35,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:31:35,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:35,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:31:35,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:31:35,775 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 19:31:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:35,948 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 19:31:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:31:35,949 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 19:31:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:35,951 INFO L225 Difference]: With dead ends: 51 [2020-07-21 19:31:35,951 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 19:31:35,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:31:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 19:31:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 19:31:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 19:31:35,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 19:31:35,961 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 19:31:35,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:35,961 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 19:31:35,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:31:35,961 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 19:31:35,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 19:31:35,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:35,964 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:36,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:36,177 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:36,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:36,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 19:31:36,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:36,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74282222] [2020-07-21 19:31:36,180 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 19:31:36,216 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:36,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:36,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:31:36,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 19:31:36,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:36,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:36,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:36,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:31:36,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74282222] [2020-07-21 19:31:36,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:36,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 19:31:36,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726694777] [2020-07-21 19:31:36,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:31:36,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:36,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:31:36,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:31:36,582 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 19:31:36,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:36,742 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 19:31:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:31:36,744 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 19:31:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:36,746 INFO L225 Difference]: With dead ends: 56 [2020-07-21 19:31:36,746 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 19:31:36,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:31:36,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 19:31:36,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 19:31:36,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 19:31:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 19:31:36,756 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 19:31:36,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:36,756 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 19:31:36,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:31:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 19:31:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 19:31:36,759 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:36,759 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:36,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:36,961 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:36,962 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 19:31:36,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:36,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [898447335] [2020-07-21 19:31:36,964 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 19:31:37,013 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:37,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:37,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:31:37,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:37,072 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 19:31:37,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:37,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:37,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:37,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:37,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 19:31:37,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [898447335] [2020-07-21 19:31:37,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:37,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 19:31:37,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663237003] [2020-07-21 19:31:37,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 19:31:37,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:37,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 19:31:37,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:31:37,606 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 19:31:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:37,812 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 19:31:37,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:31:37,813 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 19:31:37,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:37,815 INFO L225 Difference]: With dead ends: 61 [2020-07-21 19:31:37,815 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 19:31:37,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:31:37,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 19:31:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 19:31:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 19:31:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 19:31:37,827 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 19:31:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:37,827 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 19:31:37,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 19:31:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 19:31:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 19:31:37,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:37,830 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:38,046 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:38,046 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:38,047 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 19:31:38,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:38,048 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952724336] [2020-07-21 19:31:38,048 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 19:31:38,089 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:38,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:38,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:31:38,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 19:31:38,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:38,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:38,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:38,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:38,593 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:38,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:38,683 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 19:31:38,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952724336] [2020-07-21 19:31:38,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:38,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 19:31:38,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191336941] [2020-07-21 19:31:38,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 19:31:38,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:38,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 19:31:38,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:31:38,688 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 19:31:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:38,876 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 19:31:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:31:38,877 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 19:31:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:38,880 INFO L225 Difference]: With dead ends: 66 [2020-07-21 19:31:38,880 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 19:31:38,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:31:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 19:31:38,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 19:31:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 19:31:38,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 19:31:38,892 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 19:31:38,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:38,893 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 19:31:38,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 19:31:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 19:31:38,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 19:31:38,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:38,896 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:39,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:39,110 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:39,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:39,110 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 19:31:39,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:39,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995924687] [2020-07-21 19:31:39,112 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 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 19:31:39,176 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:39,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:39,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:31:39,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 19:31:39,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:39,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:39,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:39,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:40,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:40,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:40,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:40,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 19:31:40,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995924687] [2020-07-21 19:31:40,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:40,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 19:31:40,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087153278] [2020-07-21 19:31:40,155 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 19:31:40,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:40,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 19:31:40,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 19:31:40,156 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 19:31:40,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:40,382 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 19:31:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:31:40,383 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 19:31:40,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:40,386 INFO L225 Difference]: With dead ends: 71 [2020-07-21 19:31:40,386 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 19:31:40,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:31:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 19:31:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 19:31:40,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 19:31:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 19:31:40,398 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 19:31:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:40,399 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 19:31:40,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 19:31:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 19:31:40,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 19:31:40,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:40,402 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:40,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:40,605 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:40,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 19:31:40,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:40,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912168728] [2020-07-21 19:31:40,609 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 19:31:40,673 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:40,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:40,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:31:40,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 19:31:40,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:41,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:41,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:41,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:41,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 19:31:41,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912168728] [2020-07-21 19:31:41,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:41,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 19:31:41,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72510839] [2020-07-21 19:31:41,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 19:31:41,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:41,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 19:31:41,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 19:31:41,643 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 19:31:41,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:41,858 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 19:31:41,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:31:41,860 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 19:31:41,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:41,861 INFO L225 Difference]: With dead ends: 76 [2020-07-21 19:31:41,862 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 19:31:41,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:31:41,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 19:31:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 19:31:41,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 19:31:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 19:31:41,874 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 19:31:41,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:41,875 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 19:31:41,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 19:31:41,875 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 19:31:41,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 19:31:41,878 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:41,878 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:42,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:42,094 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:42,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:42,095 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 19:31:42,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:42,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591276875] [2020-07-21 19:31:42,096 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 19:31:42,194 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:42,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:42,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:31:42,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 19:31:42,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:43,347 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:43,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:43,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:43,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:43,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:43,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:43,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:43,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 19:31:43,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591276875] [2020-07-21 19:31:43,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:43,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 19:31:43,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678167899] [2020-07-21 19:31:43,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 19:31:43,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:43,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 19:31:43,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:31:43,935 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 19:31:44,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:44,207 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 19:31:44,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:31:44,208 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 19:31:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:44,211 INFO L225 Difference]: With dead ends: 81 [2020-07-21 19:31:44,211 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 19:31:44,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:31:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 19:31:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 19:31:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 19:31:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 19:31:44,223 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 19:31:44,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:44,223 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 19:31:44,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 19:31:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 19:31:44,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 19:31:44,225 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:44,226 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:44,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:44,433 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:44,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 19:31:44,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:44,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650060289] [2020-07-21 19:31:44,435 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 19:31:44,516 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:44,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:44,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:31:44,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 19:31:44,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:45,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:45,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:45,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:45,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:45,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:45,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:45,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 19:31:45,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650060289] [2020-07-21 19:31:45,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:45,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 19:31:45,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700221648] [2020-07-21 19:31:45,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 19:31:45,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:45,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 19:31:45,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:31:45,990 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 19:31:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:46,251 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 19:31:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:31:46,252 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 19:31:46,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:46,255 INFO L225 Difference]: With dead ends: 86 [2020-07-21 19:31:46,255 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 19:31:46,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:31:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 19:31:46,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 19:31:46,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 19:31:46,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 19:31:46,269 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 19:31:46,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:46,269 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 19:31:46,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 19:31:46,270 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 19:31:46,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 19:31:46,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:46,273 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:46,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:46,479 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:46,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:46,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 19:31:46,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:46,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472924730] [2020-07-21 19:31:46,481 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 19:31:46,601 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:46,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:46,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:31:46,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 19:31:46,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:47,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:47,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:48,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:48,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:48,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:48,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:48,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:48,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:48,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:48,913 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:48,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:48,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 19:31:48,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472924730] [2020-07-21 19:31:48,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:48,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 19:31:48,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786534647] [2020-07-21 19:31:48,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:31:48,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:48,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:31:48,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:31:48,972 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 19:31:49,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:49,373 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 19:31:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:31:49,374 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 19:31:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:49,377 INFO L225 Difference]: With dead ends: 91 [2020-07-21 19:31:49,377 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 19:31:49,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 19:31:49,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 19:31:49,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 19:31:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 19:31:49,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 19:31:49,388 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 19:31:49,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:49,389 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 19:31:49,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:31:49,389 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 19:31:49,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 19:31:49,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:49,392 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:49,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:49,606 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:49,607 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 19:31:49,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:49,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441938791] [2020-07-21 19:31:49,609 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 19:31:49,737 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:49,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:49,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:31:49,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 19:31:49,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:51,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:51,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:51,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:51,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:51,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:52,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:52,017 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:52,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 19:31:52,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441938791] [2020-07-21 19:31:52,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:52,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 19:31:52,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312046843] [2020-07-21 19:31:52,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:31:52,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:52,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:31:52,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:31:52,139 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 20 states. [2020-07-21 19:31:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:52,485 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 19:31:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:31:52,486 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 201 [2020-07-21 19:31:52,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:52,488 INFO L225 Difference]: With dead ends: 96 [2020-07-21 19:31:52,488 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 19:31:52,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 19:31:52,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 19:31:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 19:31:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 19:31:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 19:31:52,499 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 19:31:52,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:52,500 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 19:31:52,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:31:52,500 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 19:31:52,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 19:31:52,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:52,507 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:52,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:52,723 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:52,723 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 19:31:52,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:52,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973406163] [2020-07-21 19:31:52,724 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 19:31:52,919 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:52,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:52,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 785 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:31:52,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:53,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 19:31:53,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:55,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:55,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:55,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:55,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:56,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:56,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:56,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:56,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:56,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:56,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:56,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:56,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 19:31:56,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973406163] [2020-07-21 19:31:56,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:31:56,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 19:31:56,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324933077] [2020-07-21 19:31:56,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:31:56,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:31:56,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:31:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:31:56,753 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 22 states. [2020-07-21 19:31:57,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:31:57,190 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 19:31:57,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:31:57,191 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 351 [2020-07-21 19:31:57,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:31:57,197 INFO L225 Difference]: With dead ends: 101 [2020-07-21 19:31:57,197 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 19:31:57,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 19:31:57,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 19:31:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 19:31:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 19:31:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 19:31:57,222 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 19:31:57,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:31:57,226 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 19:31:57,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:31:57,227 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 19:31:57,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-07-21 19:31:57,229 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:31:57,229 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 22, 21, 21, 14, 14, 14, 14, 14, 14, 14, 14, 12, 10, 10, 10, 10, 10, 10, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:31:57,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:31:57,430 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:31:57,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:31:57,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1413996641, now seen corresponding path program 3 times [2020-07-21 19:31:57,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:31:57,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364838722] [2020-07-21 19:31:57,431 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 19:31:57,647 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:31:57,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:31:57,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 751 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:31:57,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:31:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 762 refuted. 0 times theorem prover too weak. 2319 trivial. 0 not checked. [2020-07-21 19:31:57,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:31:59,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:31:59,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:00,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:00,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:01,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:01,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:01,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:01,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:01,421 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3218 backedges. 137 proven. 795 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-21 19:32:01,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364838722] [2020-07-21 19:32:01,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:32:01,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 22 [2020-07-21 19:32:01,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408117086] [2020-07-21 19:32:01,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-21 19:32:01,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:32:01,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-21 19:32:01,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:32:01,514 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 22 states. [2020-07-21 19:32:01,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:32:01,949 INFO L93 Difference]: Finished difference Result 106 states and 254 transitions. [2020-07-21 19:32:01,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:32:01,950 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 337 [2020-07-21 19:32:01,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:32:01,953 INFO L225 Difference]: With dead ends: 106 [2020-07-21 19:32:01,953 INFO L226 Difference]: Without dead ends: 102 [2020-07-21 19:32:01,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 682 GetRequests, 638 SyntacticMatches, 16 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2020-07-21 19:32:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-21 19:32:01,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 65. [2020-07-21 19:32:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 19:32:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 19:32:01,965 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 337 [2020-07-21 19:32:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:32:01,965 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 19:32:01,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-21 19:32:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 19:32:01,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2020-07-21 19:32:01,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:32:01,972 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 52, 52, 47, 36, 36, 36, 36, 36, 36, 36, 36, 26, 26, 26, 26, 26, 26, 26, 26, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:32:02,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:02,186 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:32:02,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:32:02,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1230346157, now seen corresponding path program 7 times [2020-07-21 19:32:02,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:32:02,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888274945] [2020-07-21 19:32:02,187 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 19:32:02,575 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:32:02,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:32:02,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 1829 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:32:02,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:32:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2371 refuted. 0 times theorem prover too weak. 17847 trivial. 0 not checked. [2020-07-21 19:32:03,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:32:06,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:07,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:08,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:08,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:09,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:09,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:09,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:09,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:09,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:09,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:09,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:09,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20591 backedges. 373 proven. 2411 refuted. 0 times theorem prover too weak. 17807 trivial. 0 not checked. [2020-07-21 19:32:09,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888274945] [2020-07-21 19:32:09,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:32:09,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 19:32:09,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045010751] [2020-07-21 19:32:09,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 19:32:09,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:32:09,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 19:32:09,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:32:09,966 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 24 states. [2020-07-21 19:32:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:32:10,483 INFO L93 Difference]: Finished difference Result 111 states and 276 transitions. [2020-07-21 19:32:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:32:10,483 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 819 [2020-07-21 19:32:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:32:10,487 INFO L225 Difference]: With dead ends: 111 [2020-07-21 19:32:10,488 INFO L226 Difference]: Without dead ends: 107 [2020-07-21 19:32:10,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1648 GetRequests, 1599 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 19:32:10,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-21 19:32:10,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2020-07-21 19:32:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 19:32:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 19:32:10,502 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 819 [2020-07-21 19:32:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:32:10,505 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 19:32:10,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 19:32:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 19:32:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-07-21 19:32:10,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:32:10,508 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 27, 24, 24, 18, 18, 18, 18, 18, 18, 18, 18, 15, 12, 12, 12, 12, 12, 12, 12, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:32:10,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:10,722 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:32:10,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:32:10,723 INFO L82 PathProgramCache]: Analyzing trace with hash 2047786411, now seen corresponding path program 4 times [2020-07-21 19:32:10,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:32:10,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436730415] [2020-07-21 19:32:10,724 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 19:32:11,037 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:32:11,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:32:11,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 931 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 19:32:11,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:32:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1118 refuted. 0 times theorem prover too weak. 3842 trivial. 0 not checked. [2020-07-21 19:32:11,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:32:13,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:14,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:14,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:15,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:15,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:16,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:16,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:16,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:16,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:16,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:16,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 188 proven. 1162 refuted. 0 times theorem prover too weak. 3798 trivial. 0 not checked. [2020-07-21 19:32:16,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436730415] [2020-07-21 19:32:16,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:32:16,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21] total 24 [2020-07-21 19:32:16,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840628575] [2020-07-21 19:32:16,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-21 19:32:16,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:32:16,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-21 19:32:16,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:32:16,470 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 24 states. [2020-07-21 19:32:17,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:32:17,004 INFO L93 Difference]: Finished difference Result 116 states and 300 transitions. [2020-07-21 19:32:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:32:17,004 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 418 [2020-07-21 19:32:17,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:32:17,008 INFO L225 Difference]: With dead ends: 116 [2020-07-21 19:32:17,008 INFO L226 Difference]: Without dead ends: 112 [2020-07-21 19:32:17,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 796 SyntacticMatches, 18 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=205, Invalid=851, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 19:32:17,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-07-21 19:32:17,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 70. [2020-07-21 19:32:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-07-21 19:32:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 129 transitions. [2020-07-21 19:32:17,025 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 129 transitions. Word has length 418 [2020-07-21 19:32:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:32:17,026 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 129 transitions. [2020-07-21 19:32:17,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-21 19:32:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 129 transitions. [2020-07-21 19:32:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 742 [2020-07-21 19:32:17,032 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:32:17,032 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 46, 45, 45, 34, 34, 34, 34, 34, 34, 34, 34, 22, 22, 22, 22, 22, 22, 22, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:32:17,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:17,247 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:32:17,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:32:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1563866591, now seen corresponding path program 8 times [2020-07-21 19:32:17,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:32:17,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177666494] [2020-07-21 19:32:17,248 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 19:32:17,691 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:32:17,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:32:17,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:32:17,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:32:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2323 refuted. 0 times theorem prover too weak. 14314 trivial. 0 not checked. [2020-07-21 19:32:18,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:32:21,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:21,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:23,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:23,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:24,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:25,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:25,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:25,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:26,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:26,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:26,218 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:26,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:26,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:26,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:26,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:26,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17032 backedges. 395 proven. 2375 refuted. 0 times theorem prover too weak. 14262 trivial. 0 not checked. [2020-07-21 19:32:26,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177666494] [2020-07-21 19:32:26,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:32:26,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 19:32:26,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602337195] [2020-07-21 19:32:26,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 19:32:26,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:32:26,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 19:32:26,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:32:26,641 INFO L87 Difference]: Start difference. First operand 70 states and 129 transitions. Second operand 26 states. [2020-07-21 19:32:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:32:27,196 INFO L93 Difference]: Finished difference Result 121 states and 324 transitions. [2020-07-21 19:32:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:32:27,197 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 741 [2020-07-21 19:32:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:32:27,201 INFO L225 Difference]: With dead ends: 121 [2020-07-21 19:32:27,201 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 19:32:27,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1493 GetRequests, 1439 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 19:32:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 19:32:27,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-07-21 19:32:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 19:32:27,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 19:32:27,217 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 741 [2020-07-21 19:32:27,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:32:27,218 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 19:32:27,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 19:32:27,218 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 19:32:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-21 19:32:27,249 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:32:27,250 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 55, 55, 53, 37, 37, 37, 37, 37, 37, 37, 37, 27, 27, 27, 27, 27, 27, 27, 26, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:32:27,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:27,463 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:32:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:32:27,463 INFO L82 PathProgramCache]: Analyzing trace with hash 2100501163, now seen corresponding path program 4 times [2020-07-21 19:32:27,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:32:27,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468342313] [2020-07-21 19:32:27,464 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 19:32:27,979 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:32:27,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:32:27,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1939 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 19:32:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:32:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2821 refuted. 0 times theorem prover too weak. 19575 trivial. 0 not checked. [2020-07-21 19:32:28,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:32:32,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:32,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:34,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:35,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:35,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:36,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:36,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:36,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:37,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:37,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:37,252 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:37,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22856 backedges. 460 proven. 2877 refuted. 0 times theorem prover too weak. 19519 trivial. 0 not checked. [2020-07-21 19:32:37,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468342313] [2020-07-21 19:32:37,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:32:37,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 26 [2020-07-21 19:32:37,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591974225] [2020-07-21 19:32:37,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-21 19:32:37,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:32:37,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-21 19:32:37,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:32:37,653 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 26 states. [2020-07-21 19:32:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:32:38,269 INFO L93 Difference]: Finished difference Result 126 states and 350 transitions. [2020-07-21 19:32:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 19:32:38,270 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 871 [2020-07-21 19:32:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:32:38,274 INFO L225 Difference]: With dead ends: 126 [2020-07-21 19:32:38,274 INFO L226 Difference]: Without dead ends: 122 [2020-07-21 19:32:38,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1752 GetRequests, 1698 SyntacticMatches, 20 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2020-07-21 19:32:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-07-21 19:32:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-07-21 19:32:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-21 19:32:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2020-07-21 19:32:38,288 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 871 [2020-07-21 19:32:38,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:32:38,289 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2020-07-21 19:32:38,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-21 19:32:38,289 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2020-07-21 19:32:38,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1691 [2020-07-21 19:32:38,314 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:32:38,315 INFO L422 BasicCegarLoop]: trace histogram [149, 149, 110, 110, 94, 74, 74, 74, 74, 74, 74, 74, 74, 55, 55, 55, 55, 55, 55, 55, 55, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:32:38,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:38,529 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:32:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:32:38,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1326645612, now seen corresponding path program 9 times [2020-07-21 19:32:38,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:32:38,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068730630] [2020-07-21 19:32:38,530 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 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 19:32:39,312 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:32:39,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:32:39,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 3772 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 19:32:39,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:32:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6392 refuted. 0 times theorem prover too weak. 81780 trivial. 0 not checked. [2020-07-21 19:32:40,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:32:48,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:48,992 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:51,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:53,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:54,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:55,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:55,224 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:55,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:56,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:56,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:56,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:56,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:56,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:56,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:32:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 89014 backedges. 842 proven. 6457 refuted. 0 times theorem prover too weak. 81715 trivial. 0 not checked. [2020-07-21 19:32:57,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068730630] [2020-07-21 19:32:57,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:32:57,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-21 19:32:57,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74718132] [2020-07-21 19:32:57,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 19:32:57,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:32:57,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 19:32:57,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:32:57,500 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand 28 states. [2020-07-21 19:32:58,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:32:58,256 INFO L93 Difference]: Finished difference Result 131 states and 376 transitions. [2020-07-21 19:32:58,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 19:32:58,257 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1690 [2020-07-21 19:32:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:32:58,262 INFO L225 Difference]: With dead ends: 131 [2020-07-21 19:32:58,262 INFO L226 Difference]: Without dead ends: 127 [2020-07-21 19:32:58,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3392 GetRequests, 3333 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 19:32:58,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-21 19:32:58,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2020-07-21 19:32:58,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 19:32:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-21 19:32:58,277 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1690 [2020-07-21 19:32:58,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:32:58,278 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-21 19:32:58,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 19:32:58,278 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-21 19:32:58,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1433 [2020-07-21 19:32:58,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:32:58,296 INFO L422 BasicCegarLoop]: trace histogram [121, 121, 92, 92, 87, 60, 60, 60, 60, 60, 60, 60, 60, 46, 46, 46, 46, 46, 46, 46, 41, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:32:58,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:32:58,510 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:32:58,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:32:58,511 INFO L82 PathProgramCache]: Analyzing trace with hash -37703149, now seen corresponding path program 5 times [2020-07-21 19:32:58,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:32:58,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136641120] [2020-07-21 19:32:58,512 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 19:32:59,383 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:32:59,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:32:59,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 3187 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 19:32:59,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:33:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5319 refuted. 0 times theorem prover too weak. 56349 trivial. 0 not checked. [2020-07-21 19:33:00,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:33:07,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:07,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:09,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:09,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:11,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:11,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:12,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:13,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:14,515 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:14,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:14,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:15,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:15,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:15,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 62515 backedges. 847 proven. 5389 refuted. 0 times theorem prover too weak. 56279 trivial. 0 not checked. [2020-07-21 19:33:16,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136641120] [2020-07-21 19:33:16,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:33:16,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 25] total 28 [2020-07-21 19:33:16,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557481870] [2020-07-21 19:33:16,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-21 19:33:16,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:33:16,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-21 19:33:16,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:33:16,111 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 28 states. [2020-07-21 19:33:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:33:16,816 INFO L93 Difference]: Finished difference Result 136 states and 404 transitions. [2020-07-21 19:33:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 19:33:16,820 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 1432 [2020-07-21 19:33:16,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:33:16,824 INFO L225 Difference]: With dead ends: 136 [2020-07-21 19:33:16,824 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 19:33:16,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2875 GetRequests, 2816 SyntacticMatches, 22 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2020-07-21 19:33:16,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 19:33:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-07-21 19:33:16,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-07-21 19:33:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2020-07-21 19:33:16,839 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 1432 [2020-07-21 19:33:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:33:16,840 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2020-07-21 19:33:16,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-21 19:33:16,841 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2020-07-21 19:33:16,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1990 [2020-07-21 19:33:16,882 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:33:16,883 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 112, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 64, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:33:17,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:33:17,097 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:33:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:33:17,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1412849447, now seen corresponding path program 10 times [2020-07-21 19:33:17,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:33:17,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124754669] [2020-07-21 19:33:17,100 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 19:33:18,138 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:33:18,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:33:18,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 4439 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 19:33:18,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:33:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8137 refuted. 0 times theorem prover too weak. 114500 trivial. 0 not checked. [2020-07-21 19:33:19,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:33:22,946 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 19:33:29,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:29,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:33,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:35,502 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:35,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:38,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:39,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:40,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:40,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:40,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:40,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:41,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:41,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:41,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:41,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:41,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 123844 backedges. 1207 proven. 8217 refuted. 0 times theorem prover too weak. 114420 trivial. 0 not checked. [2020-07-21 19:33:43,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124754669] [2020-07-21 19:33:43,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:33:43,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-21 19:33:43,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108532590] [2020-07-21 19:33:43,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 19:33:43,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:33:43,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 19:33:43,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-21 19:33:43,073 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand 30 states. [2020-07-21 19:33:44,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:33:44,125 INFO L93 Difference]: Finished difference Result 141 states and 432 transitions. [2020-07-21 19:33:44,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 19:33:44,127 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 1989 [2020-07-21 19:33:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:33:44,131 INFO L225 Difference]: With dead ends: 141 [2020-07-21 19:33:44,132 INFO L226 Difference]: Without dead ends: 137 [2020-07-21 19:33:44,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3991 GetRequests, 3927 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 19:33:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-21 19:33:44,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2020-07-21 19:33:44,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 19:33:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-21 19:33:44,148 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 1989 [2020-07-21 19:33:44,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:33:44,149 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-21 19:33:44,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 19:33:44,150 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-21 19:33:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2050 [2020-07-21 19:33:44,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:33:44,180 INFO L422 BasicCegarLoop]: trace histogram [176, 176, 129, 129, 124, 88, 88, 88, 88, 88, 88, 88, 88, 64, 64, 64, 64, 64, 64, 64, 60, 52, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:33:44,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:33:44,381 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:33:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:33:44,383 INFO L82 PathProgramCache]: Analyzing trace with hash 266934567, now seen corresponding path program 5 times [2020-07-21 19:33:44,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:33:44,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131553677] [2020-07-21 19:33:44,384 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 19:33:45,507 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:33:45,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:33:45,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 4559 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 19:33:45,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:33:47,988 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8506 refuted. 0 times theorem prover too weak. 119697 trivial. 0 not checked. [2020-07-21 19:33:47,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:33:57,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:33:57,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:01,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:05,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:05,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:07,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:09,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:09,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:10,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:10,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:11,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:11,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:11,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:11,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:11,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:13,029 INFO L134 CoverageAnalysis]: Checked inductivity of 129454 backedges. 1251 proven. 8591 refuted. 0 times theorem prover too weak. 119612 trivial. 0 not checked. [2020-07-21 19:34:13,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131553677] [2020-07-21 19:34:13,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:34:13,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 30 [2020-07-21 19:34:13,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495101904] [2020-07-21 19:34:13,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-21 19:34:13,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:34:13,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-21 19:34:13,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2020-07-21 19:34:13,033 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 30 states. [2020-07-21 19:34:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:34:14,129 INFO L93 Difference]: Finished difference Result 146 states and 462 transitions. [2020-07-21 19:34:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 19:34:14,130 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 2049 [2020-07-21 19:34:14,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:34:14,135 INFO L225 Difference]: With dead ends: 146 [2020-07-21 19:34:14,136 INFO L226 Difference]: Without dead ends: 142 [2020-07-21 19:34:14,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4110 GetRequests, 4046 SyntacticMatches, 24 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=322, Invalid=1400, Unknown=0, NotChecked=0, Total=1722 [2020-07-21 19:34:14,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-21 19:34:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 85. [2020-07-21 19:34:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-07-21 19:34:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 180 transitions. [2020-07-21 19:34:14,152 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 180 transitions. Word has length 2049 [2020-07-21 19:34:14,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:34:14,154 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 180 transitions. [2020-07-21 19:34:14,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-21 19:34:14,154 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 180 transitions. [2020-07-21 19:34:14,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3680 [2020-07-21 19:34:14,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:34:14,270 INFO L422 BasicCegarLoop]: trace histogram [329, 329, 236, 236, 211, 164, 164, 164, 164, 164, 164, 164, 164, 118, 118, 118, 118, 118, 118, 118, 118, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:34:14,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:34:14,486 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:34:14,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:34:14,487 INFO L82 PathProgramCache]: Analyzing trace with hash -886096047, now seen corresponding path program 11 times [2020-07-21 19:34:14,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:34:14,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454727439] [2020-07-21 19:34:14,488 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 19:34:16,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:34:16,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:34:16,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 8209 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 19:34:16,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:34:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16770 refuted. 0 times theorem prover too weak. 408925 trivial. 0 not checked. [2020-07-21 19:34:20,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:34:40,560 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:48,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:53,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:53,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:34:59,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:02,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:02,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:03,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:05,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:05,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:05,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:06,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:06,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:06,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:06,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 428089 backedges. 2394 proven. 16866 refuted. 0 times theorem prover too weak. 408829 trivial. 0 not checked. [2020-07-21 19:35:11,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454727439] [2020-07-21 19:35:11,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:35:11,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-21 19:35:11,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99148541] [2020-07-21 19:35:11,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 19:35:11,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:35:11,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 19:35:11,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:35:11,941 INFO L87 Difference]: Start difference. First operand 85 states and 180 transitions. Second operand 32 states. [2020-07-21 19:35:13,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:35:13,211 INFO L93 Difference]: Finished difference Result 151 states and 492 transitions. [2020-07-21 19:35:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 19:35:13,213 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3679 [2020-07-21 19:35:13,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:35:13,222 INFO L225 Difference]: With dead ends: 151 [2020-07-21 19:35:13,222 INFO L226 Difference]: Without dead ends: 147 [2020-07-21 19:35:13,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7372 GetRequests, 7303 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 19:35:13,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-21 19:35:13,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2020-07-21 19:35:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 19:35:13,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-21 19:35:13,242 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3679 [2020-07-21 19:35:13,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:35:13,245 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-21 19:35:13,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 19:35:13,245 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-21 19:35:13,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3365 [2020-07-21 19:35:13,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:35:13,360 INFO L422 BasicCegarLoop]: trace histogram [287, 287, 214, 214, 208, 143, 143, 143, 143, 143, 143, 143, 143, 107, 107, 107, 107, 107, 107, 107, 101, 79, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:35:13,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:35:13,576 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:35:13,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:35:13,577 INFO L82 PathProgramCache]: Analyzing trace with hash 147049693, now seen corresponding path program 6 times [2020-07-21 19:35:13,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:35:13,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835651729] [2020-07-21 19:35:13,578 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 19:35:15,215 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:35:15,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:35:15,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 7483 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 19:35:15,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:35:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15526 refuted. 0 times theorem prover too weak. 332578 trivial. 0 not checked. [2020-07-21 19:35:19,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:35:23,798 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:35:24,960 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:35:25,374 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 19:35:37,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:37,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:46,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:53,285 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2020-07-21 19:35:56,265 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:35:56,266 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:00,057 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:00,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:03,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:05,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:06,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:07,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:08,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:08,422 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:08,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:08,715 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:36:12,786 INFO L134 CoverageAnalysis]: Checked inductivity of 350305 backedges. 2201 proven. 15628 refuted. 0 times theorem prover too weak. 332476 trivial. 0 not checked. [2020-07-21 19:36:12,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835651729] [2020-07-21 19:36:12,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:36:12,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 29] total 32 [2020-07-21 19:36:12,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348686086] [2020-07-21 19:36:12,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-21 19:36:12,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:36:12,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-21 19:36:12,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2020-07-21 19:36:12,791 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 32 states. [2020-07-21 19:36:14,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:36:14,400 INFO L93 Difference]: Finished difference Result 156 states and 524 transitions. [2020-07-21 19:36:14,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 19:36:14,402 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 3364 [2020-07-21 19:36:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:36:14,409 INFO L225 Difference]: With dead ends: 156 [2020-07-21 19:36:14,409 INFO L226 Difference]: Without dead ends: 152 [2020-07-21 19:36:14,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6741 GetRequests, 6672 SyntacticMatches, 26 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=369, Invalid=1611, Unknown=0, NotChecked=0, Total=1980 [2020-07-21 19:36:14,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-07-21 19:36:14,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 90. [2020-07-21 19:36:14,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-21 19:36:14,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 199 transitions. [2020-07-21 19:36:14,428 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 199 transitions. Word has length 3364 [2020-07-21 19:36:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:36:14,430 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 199 transitions. [2020-07-21 19:36:14,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-21 19:36:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 199 transitions. [2020-07-21 19:36:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4616 [2020-07-21 19:36:14,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:36:14,547 INFO L422 BasicCegarLoop]: trace histogram [436, 436, 300, 273, 273, 218, 218, 218, 218, 218, 218, 218, 218, 136, 136, 136, 136, 136, 136, 136, 136, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:36:14,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:36:14,748 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:36:14,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:36:14,751 INFO L82 PathProgramCache]: Analyzing trace with hash -554675479, now seen corresponding path program 12 times [2020-07-21 19:36:14,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:36:14,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786309329] [2020-07-21 19:36:14,752 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 19:36:16,951 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:36:16,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:36:16,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 10297 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 19:36:17,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:36:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 22920 refuted. 0 times theorem prover too weak. 665925 trivial. 0 not checked. [2020-07-21 19:36:24,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:36:29,888 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:36:29,999 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:36:30,110 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:36:31,230 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:36:31,345 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:36:31,466 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:36:31,594 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:36:33,292 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:36:33,419 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:36:33,556 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 19:36:33,689 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 19:36:33,821 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 19:36:33,944 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 19:36:34,063 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 19:36:34,180 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 19:36:34,288 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 19:36:51,204 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:36:51,409 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:36:53,227 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:36:53,335 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:36:53,450 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:36:53,567 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:36:54,860 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:36:54,977 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:36:55,103 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:36:55,230 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:36:55,347 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 19:36:55,458 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 19:36:55,561 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 19:36:55,667 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 19:36:56,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:07,897 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:37:09,766 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:37:09,869 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:37:09,980 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:37:10,091 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:37:10,198 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 19:37:11,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:28,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:35,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:39,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:43,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:43,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:47,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:49,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:50,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:51,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:51,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:52,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:52,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:37:52,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:38:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 691997 backedges. 3152 proven. 23034 refuted. 0 times theorem prover too weak. 665811 trivial. 0 not checked. [2020-07-21 19:38:00,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786309329] [2020-07-21 19:38:00,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:38:00,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-21 19:38:00,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123241961] [2020-07-21 19:38:00,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 19:38:00,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:38:00,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 19:38:00,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 19:38:00,456 INFO L87 Difference]: Start difference. First operand 90 states and 199 transitions. Second operand 34 states. [2020-07-21 19:38:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:38:03,332 INFO L93 Difference]: Finished difference Result 161 states and 556 transitions. [2020-07-21 19:38:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 19:38:03,336 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 4615 [2020-07-21 19:38:03,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:38:03,344 INFO L225 Difference]: With dead ends: 161 [2020-07-21 19:38:03,344 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 19:38:03,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9245 GetRequests, 9171 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 19:38:03,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 19:38:03,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-07-21 19:38:03,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 19:38:03,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-21 19:38:03,369 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 4615 [2020-07-21 19:38:03,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:38:03,372 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-21 19:38:03,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 19:38:03,372 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-21 19:38:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9330 [2020-07-21 19:38:04,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:38:04,280 INFO L422 BasicCegarLoop]: trace histogram [846, 846, 625, 533, 533, 423, 423, 423, 423, 423, 423, 423, 423, 359, 266, 266, 266, 266, 266, 266, 266, 221, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:38:04,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:38:04,488 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:38:04,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:38:04,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1670319822, now seen corresponding path program 6 times [2020-07-21 19:38:04,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:38:04,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906240379] [2020-07-21 19:38:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:38:08,405 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:38:08,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:38:08,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 20730 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 19:38:08,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:38:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49554 refuted. 0 times theorem prover too weak. 2725114 trivial. 0 not checked. [2020-07-21 19:38:38,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:38:41,915 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:38:42,017 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:38:42,881 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:38:42,991 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:38:43,106 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:38:43,221 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:38:44,975 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:38:45,100 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:38:45,228 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:38:45,354 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:38:49,256 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:38:49,388 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:38:49,525 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:38:49,660 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:38:56,168 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:38:56,314 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:38:56,466 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 19:38:56,620 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 19:38:56,776 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 19:38:56,919 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 19:38:57,054 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 19:38:57,185 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 19:38:57,310 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 19:38:57,427 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 19:38:57,541 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 19:38:57,647 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 19:38:57,749 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:38:57,857 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:40:02,076 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:40:02,647 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:40:02,756 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:40:02,874 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:40:02,992 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:40:03,984 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:40:04,108 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:40:04,233 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:40:04,356 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:40:06,387 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:40:06,532 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:40:06,673 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:40:06,814 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:40:11,317 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:40:11,465 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:40:11,624 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:40:11,776 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:40:11,929 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 19:40:12,069 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 19:40:12,203 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 19:40:12,332 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 19:40:12,454 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 19:40:12,575 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 19:40:12,686 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:40:12,788 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:40:13,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:13,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:54,226 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:40:54,334 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:40:54,904 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:40:55,016 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:40:55,138 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:40:55,248 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:40:56,186 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:40:56,301 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:40:56,428 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:40:56,551 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:40:58,573 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:40:58,710 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:40:58,856 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:40:58,997 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:40:59,141 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 19:40:59,271 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 19:40:59,396 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 19:40:59,517 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 19:40:59,628 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:40:59,735 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 19:40:59,839 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 19:41:00,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:18,685 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:41:18,787 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:41:19,340 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:41:19,447 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:41:19,571 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:41:19,688 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:41:20,731 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:41:20,848 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:41:20,973 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:41:21,102 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:41:21,233 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 19:41:21,355 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 19:41:21,467 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 19:41:21,573 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:41:22,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:30,733 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 19:41:30,940 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:41:31,049 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:41:31,655 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:41:31,771 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:41:31,893 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:41:32,015 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:41:32,137 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:41:32,250 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:41:32,354 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:41:33,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:33,073 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:38,382 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 19:41:38,487 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 19:41:38,599 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:41:38,713 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:41:39,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:43,353 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 19:41:43,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:48,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:50,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:52,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:53,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:53,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:53,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:53,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:53,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:53,842 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,036 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2779097 backedges. 4429 proven. 49674 refuted. 0 times theorem prover too weak. 2724994 trivial. 0 not checked. [2020-07-21 19:42:21,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906240379] [2020-07-21 19:42:21,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:21,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 31] total 34 [2020-07-21 19:42:21,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183537299] [2020-07-21 19:42:22,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-21 19:42:22,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:22,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-21 19:42:22,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-07-21 19:42:22,002 INFO L87 Difference]: Start difference. First operand 95 states and 219 transitions. Second operand 34 states. [2020-07-21 19:42:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:24,819 INFO L93 Difference]: Finished difference Result 166 states and 590 transitions. [2020-07-21 19:42:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-21 19:42:24,823 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 9329 [2020-07-21 19:42:24,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:24,834 INFO L225 Difference]: With dead ends: 166 [2020-07-21 19:42:24,834 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 19:42:24,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18672 GetRequests, 18598 SyntacticMatches, 28 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=416, Invalid=1840, Unknown=0, NotChecked=0, Total=2256 [2020-07-21 19:42:24,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 19:42:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 95. [2020-07-21 19:42:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-07-21 19:42:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2020-07-21 19:42:24,858 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 9329 [2020-07-21 19:42:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:24,865 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2020-07-21 19:42:24,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-21 19:42:24,866 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2020-07-21 19:42:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8373 [2020-07-21 19:42:25,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:25,439 INFO L422 BasicCegarLoop]: trace histogram [745, 745, 542, 542, 474, 372, 372, 372, 372, 372, 372, 372, 372, 271, 271, 271, 271, 271, 271, 271, 271, 170, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:25,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:25,640 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:25,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:25,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1593629950, now seen corresponding path program 13 times [2020-07-21 19:42:25,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:25,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514559831] [2020-07-21 19:42:25,644 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 19:42:29,198 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:29,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:29,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 18678 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 19:42:29,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2222959 backedges. 4739 proven. 46423 refuted. 0 times theorem prover too weak. 2171797 trivial. 0 not checked. [2020-07-21 19:42:51,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:53,989 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:42:54,094 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 19:42:54,559 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:42:54,676 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 19:42:54,797 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:42:54,915 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:42:55,537 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:42:55,662 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:42:55,793 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:42:55,928 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:42:57,893 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:42:58,029 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:42:58,174 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:42:58,320 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:43:00,712 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:43:00,863 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:43:01,020 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:43:01,176 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:43:03,247 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:43:03,415 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:43:03,585 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 19:43:03,760 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 19:43:12,782 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 19:43:12,985 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 19:43:13,188 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 19:43:13,384 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 19:43:13,577 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-07-21 19:43:13,768 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 19:43:13,957 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 19:43:14,141 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 19:43:14,315 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 19:43:14,488 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 19:43:14,648 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 19:43:14,800 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 19:43:14,944 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 19:43:15,081 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 19:43:15,210 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:43:15,332 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 19:43:15,446 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:43:15,555 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:43:15,658 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 19:44:32,774 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:44:32,880 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:44:32,992 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:44:33,104 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:44:34,783 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:44:34,902 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:44:35,029 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:44:35,150 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:44:37,176 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:44:37,305 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:44:37,438 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:44:37,574 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:44:39,313 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:44:39,457 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 19:44:39,604 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 19:44:39,755 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 19:44:39,905 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-07-21 19:44:40,048 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-07-21 19:44:40,183 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 19:44:40,309 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 19:44:40,431 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-07-21 19:44:40,542 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 19:44:40,652 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-21 19:44:40,757 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 19:44:41,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:41,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:56,460 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:44:56,567 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 19:44:57,119 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:44:57,232 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:44:57,347 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:44:57,461 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 19:44:59,218 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:44:59,337 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 19:44:59,464 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:44:59,593 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 19:45:01,808 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:45:01,953 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 19:45:02,106 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:45:02,255 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 19:45:02,400 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 19:45:02,541 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 19:45:02,680 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 85