/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 13:10:37,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 13:10:37,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 13:10:37,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 13:10:37,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 13:10:37,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 13:10:37,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 13:10:37,174 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 13:10:37,177 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 13:10:37,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 13:10:37,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 13:10:37,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 13:10:37,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 13:10:37,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 13:10:37,186 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 13:10:37,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 13:10:37,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 13:10:37,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 13:10:37,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 13:10:37,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 13:10:37,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 13:10:37,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 13:10:37,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 13:10:37,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 13:10:37,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 13:10:37,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 13:10:37,208 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 13:10:37,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 13:10:37,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 13:10:37,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 13:10:37,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 13:10:37,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 13:10:37,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 13:10:37,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 13:10:37,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 13:10:37,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 13:10:37,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 13:10:37,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 13:10:37,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 13:10:37,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 13:10:37,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 13:10:37,223 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 13:10:37,242 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 13:10:37,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 13:10:37,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 13:10:37,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 13:10:37,246 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 13:10:37,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 13:10:37,246 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 13:10:37,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 13:10:37,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 13:10:37,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 13:10:37,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 13:10:37,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 13:10:37,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 13:10:37,248 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 13:10:37,248 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 13:10:37,248 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 13:10:37,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 13:10:37,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 13:10:37,249 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 13:10:37,249 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 13:10:37,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 13:10:37,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 13:10:37,250 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 13:10:37,250 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 13:10:37,250 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 13:10:37,250 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 13:10:37,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:37,251 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 13:10:37,251 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 13:10:37,251 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 13:10:37,638 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 13:10:37,660 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 13:10:37,666 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 13:10:37,670 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 13:10:37,671 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 13:10:37,672 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2020-07-21 13:10:37,805 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd8537475/79b5d9df5f6f4ec7a65d30e1a98fd34e/FLAG6484d97f1 [2020-07-21 13:10:38,525 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 13:10:38,526 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2020-07-21 13:10:38,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd8537475/79b5d9df5f6f4ec7a65d30e1a98fd34e/FLAG6484d97f1 [2020-07-21 13:10:38,561 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd8537475/79b5d9df5f6f4ec7a65d30e1a98fd34e [2020-07-21 13:10:38,580 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 13:10:38,585 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 13:10:38,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 13:10:38,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 13:10:38,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 13:10:38,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:10:38" (1/1) ... [2020-07-21 13:10:38,602 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92fc932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:38, skipping insertion in model container [2020-07-21 13:10:38,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:10:38" (1/1) ... [2020-07-21 13:10:38,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 13:10:38,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 13:10:38,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:10:38,951 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 13:10:38,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 13:10:38,990 INFO L208 MainTranslator]: Completed translation [2020-07-21 13:10:38,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:38 WrapperNode [2020-07-21 13:10:38,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 13:10:38,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 13:10:38,993 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 13:10:38,993 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 13:10:39,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:38" (1/1) ... [2020-07-21 13:10:39,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:38" (1/1) ... [2020-07-21 13:10:39,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:38" (1/1) ... [2020-07-21 13:10:39,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:38" (1/1) ... [2020-07-21 13:10:39,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:38" (1/1) ... [2020-07-21 13:10:39,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:38" (1/1) ... [2020-07-21 13:10:39,032 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:38" (1/1) ... [2020-07-21 13:10:39,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 13:10:39,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 13:10:39,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 13:10:39,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 13:10:39,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:38" (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 13:10:39,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 13:10:39,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 13:10:39,245 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 13:10:39,245 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 13:10:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 13:10:39,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 13:10:39,246 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 13:10:39,246 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 13:10:39,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 13:10:39,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 13:10:39,496 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 13:10:39,496 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 13:10:39,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:10:39 BoogieIcfgContainer [2020-07-21 13:10:39,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 13:10:39,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 13:10:39,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 13:10:39,510 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 13:10:39,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:10:38" (1/3) ... [2020-07-21 13:10:39,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8b9d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:10:39, skipping insertion in model container [2020-07-21 13:10:39,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:10:38" (2/3) ... [2020-07-21 13:10:39,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c8b9d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:10:39, skipping insertion in model container [2020-07-21 13:10:39,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:10:39" (3/3) ... [2020-07-21 13:10:39,518 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_25-2.c [2020-07-21 13:10:39,535 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 13:10:39,548 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 13:10:39,570 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 13:10:39,602 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 13:10:39,602 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 13:10:39,602 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 13:10:39,602 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 13:10:39,603 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 13:10:39,603 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 13:10:39,603 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 13:10:39,603 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 13:10:39,628 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 13:10:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 13:10:39,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:39,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:39,640 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:39,649 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 13:10:39,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:39,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461188900] [2020-07-21 13:10:39,658 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 13:10:39,750 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:39,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:39,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:10:39,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:39,913 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 13:10:39,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:10:39,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461188900] [2020-07-21 13:10:39,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:10:39,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:10:39,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149074916] [2020-07-21 13:10:39,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:10:39,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:39,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:10:39,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:10:39,992 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 13:10:40,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:40,166 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 13:10:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:10:40,169 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 13:10:40,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:40,186 INFO L225 Difference]: With dead ends: 35 [2020-07-21 13:10:40,186 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 13:10:40,192 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 13:10:40,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 13:10:40,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 13:10:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 13:10:40,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 13:10:40,273 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 13:10:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:40,274 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 13:10:40,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:10:40,274 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 13:10:40,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 13:10:40,278 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:40,278 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:40,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:40,494 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:40,495 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 13:10:40,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:40,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335599395] [2020-07-21 13:10:40,497 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 13:10:40,533 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:40,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:40,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 13:10:40,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:40,604 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 13:10:40,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 13:10:40,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1335599395] [2020-07-21 13:10:40,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 13:10:40,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 13:10:40,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154791053] [2020-07-21 13:10:40,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 13:10:40,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:40,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 13:10:40,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 13:10:40,616 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 13:10:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:40,791 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 13:10:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 13:10:40,795 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 13:10:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:40,798 INFO L225 Difference]: With dead ends: 27 [2020-07-21 13:10:40,799 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 13:10:40,801 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 13:10:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 13:10:40,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 13:10:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 13:10:40,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 13:10:40,813 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 13:10:40,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:40,814 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 13:10:40,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 13:10:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 13:10:40,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 13:10:40,816 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:40,817 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:41,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:41,034 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:41,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:41,036 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 13:10:41,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:41,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647837919] [2020-07-21 13:10:41,037 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 13:10:41,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:41,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:41,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:10:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:41,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 13:10:41,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:41,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 13:10:41,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647837919] [2020-07-21 13:10:41,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:41,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 13:10:41,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118780285] [2020-07-21 13:10:41,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 13:10:41,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:41,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 13:10:41,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 13:10:41,502 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 13:10:41,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:41,688 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 13:10:41,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:10:41,689 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 13:10:41,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:41,692 INFO L225 Difference]: With dead ends: 32 [2020-07-21 13:10:41,692 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 13:10:41,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:10:41,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 13:10:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 13:10:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 13:10:41,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 13:10:41,705 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 13:10:41,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:41,706 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 13:10:41,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 13:10:41,707 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 13:10:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 13:10:41,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:41,709 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:41,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:41,912 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:41,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:41,913 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 13:10:41,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:41,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013762947] [2020-07-21 13:10:41,914 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 13:10:41,955 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:41,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:41,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 13:10:41,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 13:10:42,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:42,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-21 13:10:42,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013762947] [2020-07-21 13:10:42,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:42,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 13:10:42,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979530970] [2020-07-21 13:10:42,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 13:10:42,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:42,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 13:10:42,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 13:10:42,263 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 13:10:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:42,413 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 13:10:42,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 13:10:42,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 13:10:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:42,417 INFO L225 Difference]: With dead ends: 37 [2020-07-21 13:10:42,418 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 13:10:42,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:10:42,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 13:10:42,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 13:10:42,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 13:10:42,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 13:10:42,431 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 13:10:42,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:42,432 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 13:10:42,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 13:10:42,432 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 13:10:42,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 13:10:42,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:42,435 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:42,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:42,651 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:42,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:42,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 13:10:42,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:42,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81194278] [2020-07-21 13:10:42,653 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 13:10:42,721 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:42,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:42,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:10:42,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-21 13:10:42,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:43,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:43,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:43,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:43,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 13:10:43,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81194278] [2020-07-21 13:10:43,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:43,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 13:10:43,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864896631] [2020-07-21 13:10:43,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:10:43,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:43,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:10:43,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:10:43,324 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 13:10:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:43,571 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 13:10:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:10:43,573 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 13:10:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:43,576 INFO L225 Difference]: With dead ends: 42 [2020-07-21 13:10:43,576 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 13:10:43,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:10:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 13:10:43,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 13:10:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 13:10:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 13:10:43,591 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 13:10:43,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:43,591 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 13:10:43,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:10:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 13:10:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 13:10:43,594 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:43,595 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:43,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:43,808 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:43,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 13:10:43,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:43,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162562061] [2020-07-21 13:10:43,810 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 13:10:43,883 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:43,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 13:10:43,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:43,940 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-21 13:10:43,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:44,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:44,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:44,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-21 13:10:44,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162562061] [2020-07-21 13:10:44,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:44,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 13:10:44,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767219534] [2020-07-21 13:10:44,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 13:10:44,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:44,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 13:10:44,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 13:10:44,367 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 13:10:44,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:44,576 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 13:10:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 13:10:44,576 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 13:10:44,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:44,580 INFO L225 Difference]: With dead ends: 47 [2020-07-21 13:10:44,580 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 13:10:44,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 13:10:44,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 13:10:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 13:10:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 13:10:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 13:10:44,595 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 13:10:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:44,596 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 13:10:44,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 13:10:44,596 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 13:10:44,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 13:10:44,599 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:44,600 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:44,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:44,812 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:44,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:44,813 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 13:10:44,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:44,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523641340] [2020-07-21 13:10:44,814 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 13:10:44,864 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:44,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:44,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:10:44,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-21 13:10:44,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:45,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:45,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:45,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:45,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:45,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:45,781 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-21 13:10:45,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523641340] [2020-07-21 13:10:45,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:45,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 13:10:45,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661982048] [2020-07-21 13:10:45,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:10:45,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:45,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:10:45,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:10:45,786 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 13:10:46,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:46,062 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 13:10:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:10:46,064 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 13:10:46,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:46,071 INFO L225 Difference]: With dead ends: 52 [2020-07-21 13:10:46,071 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 13:10:46,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:10:46,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 13:10:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 13:10:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 13:10:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 13:10:46,124 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 13:10:46,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:46,128 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 13:10:46,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:10:46,128 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 13:10:46,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 13:10:46,138 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:46,138 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:46,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:46,358 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:46,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 13:10:46,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:46,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356839173] [2020-07-21 13:10:46,360 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 13:10:46,428 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:46,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:46,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 13:10:46,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-21 13:10:46,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:47,167 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:47,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:47,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:47,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-21 13:10:47,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356839173] [2020-07-21 13:10:47,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:47,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 13:10:47,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499093641] [2020-07-21 13:10:47,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 13:10:47,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:47,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 13:10:47,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 13:10:47,465 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-21 13:10:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:47,683 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-21 13:10:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 13:10:47,687 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-21 13:10:47,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:47,690 INFO L225 Difference]: With dead ends: 57 [2020-07-21 13:10:47,691 INFO L226 Difference]: Without dead ends: 53 [2020-07-21 13:10:47,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:10:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-21 13:10:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-21 13:10:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 13:10:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 13:10:47,711 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-21 13:10:47,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:47,712 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 13:10:47,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 13:10:47,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 13:10:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-21 13:10:47,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:47,715 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:47,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:47,931 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:47,933 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-21 13:10:47,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:47,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836983672] [2020-07-21 13:10:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:10:48,045 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:48,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:48,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:10:48,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-21 13:10:48,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:48,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:48,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:49,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:49,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:49,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:49,405 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-21 13:10:49,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836983672] [2020-07-21 13:10:49,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:49,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 13:10:49,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940020669] [2020-07-21 13:10:49,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:10:49,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:49,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:10:49,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:10:49,409 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-21 13:10:49,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:49,809 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-21 13:10:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:10:49,810 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-21 13:10:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:49,814 INFO L225 Difference]: With dead ends: 62 [2020-07-21 13:10:49,814 INFO L226 Difference]: Without dead ends: 58 [2020-07-21 13:10:49,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:10:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-21 13:10:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-21 13:10:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 13:10:49,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 13:10:49,833 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-21 13:10:49,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:49,834 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 13:10:49,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:10:49,834 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 13:10:49,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-21 13:10:49,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:49,838 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:50,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:50,049 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:50,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:50,050 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-21 13:10:50,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:50,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286349341] [2020-07-21 13:10:50,051 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 13:10:50,173 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:50,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:50,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 13:10:50,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:50,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-21 13:10:50,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:51,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:51,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:51,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:51,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:51,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:51,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-21 13:10:51,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286349341] [2020-07-21 13:10:51,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:51,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 13:10:51,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201158704] [2020-07-21 13:10:51,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 13:10:51,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 13:10:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 13:10:51,699 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-21 13:10:51,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:51,967 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-21 13:10:51,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 13:10:51,968 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-21 13:10:51,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:51,972 INFO L225 Difference]: With dead ends: 67 [2020-07-21 13:10:51,972 INFO L226 Difference]: Without dead ends: 63 [2020-07-21 13:10:51,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-21 13:10:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-21 13:10:52,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-21 13:10:52,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 13:10:52,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-21 13:10:52,003 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-21 13:10:52,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:52,004 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-21 13:10:52,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 13:10:52,004 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-21 13:10:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 13:10:52,009 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:52,009 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:52,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:52,225 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:52,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-21 13:10:52,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:52,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550421294] [2020-07-21 13:10:52,226 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 13:10:52,380 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:52,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:52,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:10:52,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-21 13:10:52,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:54,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:54,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:54,662 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:54,773 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:54,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:54,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-21 13:10:54,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550421294] [2020-07-21 13:10:54,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:54,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 13:10:54,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180383292] [2020-07-21 13:10:54,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:10:54,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:54,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:10:54,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:10:54,922 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-21 13:10:55,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:55,250 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-21 13:10:55,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:10:55,251 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-21 13:10:55,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:55,255 INFO L225 Difference]: With dead ends: 72 [2020-07-21 13:10:55,256 INFO L226 Difference]: Without dead ends: 68 [2020-07-21 13:10:55,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:10:55,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-21 13:10:55,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-21 13:10:55,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 13:10:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 13:10:55,303 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-21 13:10:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:55,306 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 13:10:55,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:10:55,306 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 13:10:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-07-21 13:10:55,316 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:55,317 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 34, 21, 21, 21, 21, 21, 21, 21, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:55,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:55,531 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:55,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:55,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1006419304, now seen corresponding path program 5 times [2020-07-21 13:10:55,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:55,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816482977] [2020-07-21 13:10:55,532 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 13:10:55,700 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:55,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:55,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 13:10:55,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1055 refuted. 0 times theorem prover too weak. 3799 trivial. 0 not checked. [2020-07-21 13:10:55,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:10:57,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:58,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:58,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:58,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:58,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:58,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:10:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5013 backedges. 159 proven. 1095 refuted. 0 times theorem prover too weak. 3759 trivial. 0 not checked. [2020-07-21 13:10:58,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816482977] [2020-07-21 13:10:58,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:10:58,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 13:10:58,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82735420] [2020-07-21 13:10:58,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 13:10:58,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:10:58,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 13:10:58,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 13:10:58,497 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-21 13:10:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:10:58,697 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-21 13:10:58,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 13:10:58,698 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 299 [2020-07-21 13:10:58,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:10:58,701 INFO L225 Difference]: With dead ends: 77 [2020-07-21 13:10:58,701 INFO L226 Difference]: Without dead ends: 73 [2020-07-21 13:10:58,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 570 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:10:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-21 13:10:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-21 13:10:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-21 13:10:58,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-21 13:10:58,726 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 299 [2020-07-21 13:10:58,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:10:58,728 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-21 13:10:58,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 13:10:58,728 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-21 13:10:58,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2020-07-21 13:10:58,735 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:10:58,735 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:10:58,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:58,949 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:10:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:10:58,950 INFO L82 PathProgramCache]: Analyzing trace with hash 785285043, now seen corresponding path program 6 times [2020-07-21 13:10:58,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:10:58,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277237525] [2020-07-21 13:10:58,950 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:10:59,211 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:10:59,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:10:59,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:10:59,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:10:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2126 refuted. 0 times theorem prover too weak. 12702 trivial. 0 not checked. [2020-07-21 13:10:59,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:11:01,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:02,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:03,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:03,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:03,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:03,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:03,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:03,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 15219 backedges. 391 proven. 2177 refuted. 0 times theorem prover too weak. 12651 trivial. 0 not checked. [2020-07-21 13:11:03,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277237525] [2020-07-21 13:11:03,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:11:03,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 13:11:03,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666545224] [2020-07-21 13:11:03,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:11:03,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:11:03,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:11:03,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:11:03,761 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-21 13:11:04,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:11:04,429 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-21 13:11:04,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:11:04,430 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 507 [2020-07-21 13:11:04,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:11:04,440 INFO L225 Difference]: With dead ends: 82 [2020-07-21 13:11:04,441 INFO L226 Difference]: Without dead ends: 78 [2020-07-21 13:11:04,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 983 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:11:04,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-21 13:11:04,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-21 13:11:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 13:11:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 13:11:04,472 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 507 [2020-07-21 13:11:04,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:11:04,474 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 13:11:04,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:11:04,475 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 13:11:04,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 13:11:04,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:11:04,480 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:11:04,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:04,694 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:11:04,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:11:04,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-21 13:11:04,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:11:04,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [899861813] [2020-07-21 13:11:04,696 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:04,936 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:11:04,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:11:04,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 13:11:04,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:11:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1918 refuted. 0 times theorem prover too weak. 9431 trivial. 0 not checked. [2020-07-21 13:11:05,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:11:07,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:08,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:08,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:08,534 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:08,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:08,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:08,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:08,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:08,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:09,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1975 refuted. 0 times theorem prover too weak. 9374 trivial. 0 not checked. [2020-07-21 13:11:09,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [899861813] [2020-07-21 13:11:09,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:11:09,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 13:11:09,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030243613] [2020-07-21 13:11:09,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 13:11:09,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:11:09,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 13:11:09,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 13:11:09,059 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-21 13:11:09,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:11:09,460 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-21 13:11:09,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 13:11:09,462 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-21 13:11:09,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:11:09,467 INFO L225 Difference]: With dead ends: 87 [2020-07-21 13:11:09,468 INFO L226 Difference]: Without dead ends: 83 [2020-07-21 13:11:09,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 13:11:09,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-21 13:11:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-21 13:11:09,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-21 13:11:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-21 13:11:09,510 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 450 [2020-07-21 13:11:09,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:11:09,511 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-21 13:11:09,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 13:11:09,512 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-21 13:11:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1067 [2020-07-21 13:11:09,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:11:09,534 INFO L422 BasicCegarLoop]: trace histogram [163, 163, 82, 81, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:11:09,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:09,749 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:11:09,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:11:09,750 INFO L82 PathProgramCache]: Analyzing trace with hash 40336450, now seen corresponding path program 7 times [2020-07-21 13:11:09,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:11:09,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701720715] [2020-07-21 13:11:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:10,398 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:11:10,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:11:10,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 2379 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:11:10,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:11:11,118 INFO L134 CoverageAnalysis]: Checked inductivity of 69012 backedges. 797 proven. 5632 refuted. 0 times theorem prover too weak. 62583 trivial. 0 not checked. [2020-07-21 13:11:11,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:11:15,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:15,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:17,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:18,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:18,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:18,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:18,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:18,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:18,687 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:18,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:18,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:18,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 69012 backedges. 797 proven. 5702 refuted. 0 times theorem prover too weak. 62513 trivial. 0 not checked. [2020-07-21 13:11:19,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701720715] [2020-07-21 13:11:19,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:11:19,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 13:11:19,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727521404] [2020-07-21 13:11:19,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:11:19,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:11:19,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:11:19,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:11:19,481 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-21 13:11:20,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:11:20,389 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-21 13:11:20,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:11:20,390 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1066 [2020-07-21 13:11:20,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:11:20,397 INFO L225 Difference]: With dead ends: 92 [2020-07-21 13:11:20,397 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 13:11:20,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2140 GetRequests, 2097 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:11:20,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 13:11:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-21 13:11:20,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 13:11:20,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 13:11:20,418 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1066 [2020-07-21 13:11:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:11:20,421 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 13:11:20,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:11:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 13:11:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 657 [2020-07-21 13:11:20,428 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:11:20,429 INFO L422 BasicCegarLoop]: trace histogram [95, 95, 79, 47, 47, 47, 47, 47, 47, 47, 32, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:11:20,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:20,645 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:11:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:11:20,645 INFO L82 PathProgramCache]: Analyzing trace with hash -312379166, now seen corresponding path program 7 times [2020-07-21 13:11:20,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:11:20,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762285474] [2020-07-21 13:11:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:21,111 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:11:21,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:11:21,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 13:11:21,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:11:21,458 INFO L134 CoverageAnalysis]: Checked inductivity of 25265 backedges. 501 proven. 3394 refuted. 0 times theorem prover too weak. 21370 trivial. 0 not checked. [2020-07-21 13:11:21,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:11:24,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:24,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:25,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:26,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:26,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:26,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:26,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:27,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:27,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:27,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 25265 backedges. 501 proven. 3471 refuted. 0 times theorem prover too weak. 21293 trivial. 0 not checked. [2020-07-21 13:11:27,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762285474] [2020-07-21 13:11:27,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:11:27,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 13:11:27,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189542805] [2020-07-21 13:11:27,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 13:11:27,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:11:27,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 13:11:27,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 13:11:27,968 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 21 states. [2020-07-21 13:11:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:11:28,826 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-21 13:11:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 13:11:28,827 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 656 [2020-07-21 13:11:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:11:28,836 INFO L225 Difference]: With dead ends: 97 [2020-07-21 13:11:28,836 INFO L226 Difference]: Without dead ends: 93 [2020-07-21 13:11:28,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1319 GetRequests, 1276 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:11:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-21 13:11:28,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-21 13:11:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-21 13:11:28,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-21 13:11:28,860 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 656 [2020-07-21 13:11:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:11:28,862 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-21 13:11:28,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 13:11:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-21 13:11:28,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1275 [2020-07-21 13:11:28,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:11:28,883 INFO L422 BasicCegarLoop]: trace histogram [195, 195, 98, 97, 97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:11:29,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:29,098 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:11:29,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:11:29,099 INFO L82 PathProgramCache]: Analyzing trace with hash 971855614, now seen corresponding path program 8 times [2020-07-21 13:11:29,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:11:29,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562091115] [2020-07-21 13:11:29,100 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:29,744 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:11:29,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:11:29,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 2843 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 13:11:29,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:11:30,707 INFO L134 CoverageAnalysis]: Checked inductivity of 98940 backedges. 1168 proven. 7570 refuted. 0 times theorem prover too weak. 90202 trivial. 0 not checked. [2020-07-21 13:11:30,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:11:36,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:38,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:40,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:40,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:40,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:41,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:41,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:41,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:41,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:41,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:41,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:41,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 98940 backedges. 1168 proven. 7662 refuted. 0 times theorem prover too weak. 90110 trivial. 0 not checked. [2020-07-21 13:11:42,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562091115] [2020-07-21 13:11:42,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:11:42,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 13:11:42,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573862606] [2020-07-21 13:11:42,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 13:11:42,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:11:42,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 13:11:42,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:11:42,438 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 23 states. [2020-07-21 13:11:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:11:43,744 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-21 13:11:43,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:11:43,745 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1274 [2020-07-21 13:11:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:11:43,751 INFO L225 Difference]: With dead ends: 102 [2020-07-21 13:11:43,752 INFO L226 Difference]: Without dead ends: 98 [2020-07-21 13:11:43,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2557 GetRequests, 2509 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 13:11:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-21 13:11:43,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-21 13:11:43,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 13:11:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 13:11:43,775 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1274 [2020-07-21 13:11:43,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:11:43,778 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 13:11:43,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 13:11:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 13:11:43,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1821 [2020-07-21 13:11:43,817 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:11:43,818 INFO L422 BasicCegarLoop]: trace histogram [267, 267, 211, 133, 133, 133, 133, 133, 133, 133, 78, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:11:44,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:44,035 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:11:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:11:44,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1926911020, now seen corresponding path program 8 times [2020-07-21 13:11:44,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:11:44,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039706055] [2020-07-21 13:11:44,037 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:11:44,865 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:11:44,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:11:44,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 4043 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 13:11:44,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:11:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 199311 backedges. 1523 proven. 11417 refuted. 0 times theorem prover too weak. 186371 trivial. 0 not checked. [2020-07-21 13:11:46,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:11:54,697 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:57,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:57,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:58,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:58,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:59,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:59,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:59,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:11:59,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:00,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:00,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 199311 backedges. 1523 proven. 11517 refuted. 0 times theorem prover too weak. 186271 trivial. 0 not checked. [2020-07-21 13:12:01,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039706055] [2020-07-21 13:12:01,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:12:01,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 13:12:01,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816062408] [2020-07-21 13:12:01,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 13:12:01,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:12:01,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 13:12:01,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 13:12:01,268 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 23 states. [2020-07-21 13:12:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:12:02,012 INFO L93 Difference]: Finished difference Result 107 states and 432 transitions. [2020-07-21 13:12:02,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 13:12:02,013 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1820 [2020-07-21 13:12:02,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:12:02,019 INFO L225 Difference]: With dead ends: 107 [2020-07-21 13:12:02,019 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 13:12:02,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3648 GetRequests, 3600 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 13:12:02,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 13:12:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2020-07-21 13:12:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 13:12:02,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-21 13:12:02,037 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1820 [2020-07-21 13:12:02,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:12:02,039 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-21 13:12:02,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 13:12:02,039 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-21 13:12:02,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2029 [2020-07-21 13:12:02,066 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:12:02,067 INFO L422 BasicCegarLoop]: trace histogram [311, 311, 156, 155, 155, 155, 155, 155, 155, 155, 155, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:12:02,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:12:02,273 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:12:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:12:02,274 INFO L82 PathProgramCache]: Analyzing trace with hash -2013442466, now seen corresponding path program 9 times [2020-07-21 13:12:02,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:12:02,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822016546] [2020-07-21 13:12:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:12:03,090 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:12:03,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:12:03,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 4525 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 13:12:03,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:12:04,806 INFO L134 CoverageAnalysis]: Checked inductivity of 252495 backedges. 2059 proven. 13739 refuted. 0 times theorem prover too weak. 236697 trivial. 0 not checked. [2020-07-21 13:12:04,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:12:11,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:15,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:16,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:17,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:17,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:18,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:18,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:18,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:18,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:18,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:18,860 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:18,912 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 252495 backedges. 2059 proven. 13856 refuted. 0 times theorem prover too weak. 236580 trivial. 0 not checked. [2020-07-21 13:12:20,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822016546] [2020-07-21 13:12:20,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:12:20,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 13:12:20,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331994026] [2020-07-21 13:12:20,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 13:12:20,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:12:20,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 13:12:20,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:12:20,289 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 25 states. [2020-07-21 13:12:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:12:21,334 INFO L93 Difference]: Finished difference Result 112 states and 474 transitions. [2020-07-21 13:12:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 13:12:21,335 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 2028 [2020-07-21 13:12:21,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:12:21,341 INFO L225 Difference]: With dead ends: 112 [2020-07-21 13:12:21,341 INFO L226 Difference]: Without dead ends: 108 [2020-07-21 13:12:21,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4066 GetRequests, 4013 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 13:12:21,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-21 13:12:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-07-21 13:12:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 13:12:21,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-21 13:12:21,359 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 2028 [2020-07-21 13:12:21,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:12:21,361 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-21 13:12:21,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 13:12:21,361 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-21 13:12:21,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3145 [2020-07-21 13:12:21,429 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:12:21,430 INFO L422 BasicCegarLoop]: trace histogram [461, 461, 371, 230, 230, 230, 230, 230, 230, 230, 141, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:12:21,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:12:21,631 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:12:21,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:12:21,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1076189233, now seen corresponding path program 9 times [2020-07-21 13:12:21,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:12:21,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138602305] [2020-07-21 13:12:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:12:22,791 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:12:22,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:12:22,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 6982 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 13:12:22,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:12:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 598095 backedges. 3029 proven. 22265 refuted. 0 times theorem prover too weak. 572801 trivial. 0 not checked. [2020-07-21 13:12:26,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:12:36,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:41,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:44,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:44,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:45,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:45,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:46,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:46,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:46,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:46,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:46,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:46,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:12:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 598095 backedges. 3029 proven. 22391 refuted. 0 times theorem prover too weak. 572675 trivial. 0 not checked. [2020-07-21 13:12:50,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138602305] [2020-07-21 13:12:50,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:12:50,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 13:12:50,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005931726] [2020-07-21 13:12:50,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 13:12:50,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:12:50,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 13:12:50,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 13:12:50,075 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 25 states. [2020-07-21 13:12:50,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:12:50,979 INFO L93 Difference]: Finished difference Result 117 states and 518 transitions. [2020-07-21 13:12:50,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 13:12:50,980 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 3144 [2020-07-21 13:12:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:12:50,986 INFO L225 Difference]: With dead ends: 117 [2020-07-21 13:12:50,986 INFO L226 Difference]: Without dead ends: 113 [2020-07-21 13:12:50,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6297 GetRequests, 6244 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 13:12:50,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-21 13:12:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-07-21 13:12:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-21 13:12:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-21 13:12:51,007 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 3144 [2020-07-21 13:12:51,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:12:51,010 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-21 13:12:51,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 13:12:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-21 13:12:51,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3979 [2020-07-21 13:12:51,110 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:12:51,111 INFO L422 BasicCegarLoop]: trace histogram [611, 611, 306, 305, 305, 305, 305, 305, 305, 305, 305, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:12:51,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:12:51,312 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:12:51,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:12:51,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1096565120, now seen corresponding path program 10 times [2020-07-21 13:12:51,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:12:51,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959782863] [2020-07-21 13:12:51,316 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:12:52,781 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:12:52,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:12:52,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 8875 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 13:12:52,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:12:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 977220 backedges. 4000 proven. 30795 refuted. 0 times theorem prover too weak. 942425 trivial. 0 not checked. [2020-07-21 13:12:58,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:13:12,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:12,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:19,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:22,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:24,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:25,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:26,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:26,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:26,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:26,988 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:27,096 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:27,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:13:32,582 INFO L134 CoverageAnalysis]: Checked inductivity of 977220 backedges. 4000 proven. 30940 refuted. 0 times theorem prover too weak. 942280 trivial. 0 not checked. [2020-07-21 13:13:32,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959782863] [2020-07-21 13:13:32,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:13:32,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 13:13:32,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170675287] [2020-07-21 13:13:32,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 13:13:32,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:13:32,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 13:13:32,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 13:13:32,587 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 27 states. [2020-07-21 13:13:33,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:13:33,682 INFO L93 Difference]: Finished difference Result 122 states and 564 transitions. [2020-07-21 13:13:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 13:13:33,683 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 3978 [2020-07-21 13:13:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:13:33,692 INFO L225 Difference]: With dead ends: 122 [2020-07-21 13:13:33,692 INFO L226 Difference]: Without dead ends: 118 [2020-07-21 13:13:33,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7967 GetRequests, 7909 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 13:13:33,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-21 13:13:33,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2020-07-21 13:13:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 13:13:33,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-21 13:13:33,713 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 3978 [2020-07-21 13:13:33,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:13:33,716 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-21 13:13:33,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 13:13:33,717 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-21 13:13:33,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3877 [2020-07-21 13:13:33,819 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:13:33,821 INFO L422 BasicCegarLoop]: trace histogram [569, 569, 455, 284, 284, 284, 284, 284, 284, 284, 171, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:13:34,021 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:13:34,022 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:13:34,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:13:34,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1124129157, now seen corresponding path program 10 times [2020-07-21 13:13:34,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:13:34,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274943359] [2020-07-21 13:13:34,025 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:13:35,566 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:13:35,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:13:35,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 8608 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 13:13:35,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:13:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 910413 backedges. 3902 proven. 30601 refuted. 0 times theorem prover too weak. 875910 trivial. 0 not checked. [2020-07-21 13:13:40,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:13:54,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:01,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:01,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:05,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:05,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:07,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:07,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:09,148 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:09,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:09,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:09,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:10,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:10,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:10,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:10,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:10,513 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:10,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:14:15,113 INFO L134 CoverageAnalysis]: Checked inductivity of 910413 backedges. 3902 proven. 30756 refuted. 0 times theorem prover too weak. 875755 trivial. 0 not checked. [2020-07-21 13:14:15,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274943359] [2020-07-21 13:14:15,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:14:15,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 13:14:15,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44485168] [2020-07-21 13:14:15,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 13:14:15,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:14:15,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 13:14:15,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 13:14:15,118 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 27 states. [2020-07-21 13:14:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:14:16,641 INFO L93 Difference]: Finished difference Result 127 states and 612 transitions. [2020-07-21 13:14:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 13:14:16,644 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 3876 [2020-07-21 13:14:16,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:14:16,651 INFO L225 Difference]: With dead ends: 127 [2020-07-21 13:14:16,651 INFO L226 Difference]: Without dead ends: 123 [2020-07-21 13:14:16,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7762 GetRequests, 7704 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-21 13:14:16,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-21 13:14:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2020-07-21 13:14:16,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-21 13:14:16,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-21 13:14:16,681 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 3876 [2020-07-21 13:14:16,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:14:16,685 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-21 13:14:16,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 13:14:16,685 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-21 13:14:17,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14041 [2020-07-21 13:14:17,602 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:14:17,607 INFO L422 BasicCegarLoop]: trace histogram [2159, 2159, 1080, 1079, 1079, 1079, 1079, 1079, 1079, 1079, 1079, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:14:17,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:14:17,808 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:14:17,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:14:17,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1760661492, now seen corresponding path program 11 times [2020-07-21 13:14:17,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:14:17,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304569178] [2020-07-21 13:14:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:14:22,695 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:14:22,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:14:22,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 31321 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 13:14:22,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:15:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12226149 backedges. 13193 proven. 123136 refuted. 0 times theorem prover too weak. 12089820 trivial. 0 not checked. [2020-07-21 13:15:23,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:16:44,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:19,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:29,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:29,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:37,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:37,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:42,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:44,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:44,801 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:46,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:46,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:46,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:47,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:47,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:47,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:17:47,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:18:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12226149 backedges. 13193 proven. 123312 refuted. 0 times theorem prover too weak. 12089644 trivial. 0 not checked. [2020-07-21 13:18:47,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304569178] [2020-07-21 13:18:47,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:18:47,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 13:18:47,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182706803] [2020-07-21 13:18:47,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 13:18:47,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:18:47,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 13:18:47,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:18:47,287 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 29 states. [2020-07-21 13:18:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:18:50,244 INFO L93 Difference]: Finished difference Result 132 states and 662 transitions. [2020-07-21 13:18:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 13:18:50,246 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 14040 [2020-07-21 13:18:50,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:18:50,266 INFO L225 Difference]: With dead ends: 132 [2020-07-21 13:18:50,266 INFO L226 Difference]: Without dead ends: 128 [2020-07-21 13:18:50,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28092 GetRequests, 28029 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 13:18:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-21 13:18:50,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2020-07-21 13:18:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 13:18:50,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-21 13:18:50,294 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 14040 [2020-07-21 13:18:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:18:50,303 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-21 13:18:50,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 13:18:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-21 13:18:50,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5621 [2020-07-21 13:18:50,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:18:50,686 INFO L422 BasicCegarLoop]: trace histogram [825, 825, 663, 412, 412, 412, 412, 412, 412, 412, 251, 162, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:18:50,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:18:50,901 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:18:50,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:18:50,904 INFO L82 PathProgramCache]: Analyzing trace with hash -320484569, now seen corresponding path program 11 times [2020-07-21 13:18:50,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:18:50,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314255416] [2020-07-21 13:18:50,906 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 13:18:53,788 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:18:53,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:18:53,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 12480 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 13:18:53,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:19:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1917717 backedges. 5294 proven. 49727 refuted. 0 times theorem prover too weak. 1862696 trivial. 0 not checked. [2020-07-21 13:19:04,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:19:07,825 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 13:19:09,032 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 13:19:09,334 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:19:10,472 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:19:10,594 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:19:10,726 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 13:19:10,857 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 13:19:14,343 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 13:19:14,454 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 13:19:14,584 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 13:19:14,718 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 13:19:14,845 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 13:19:14,971 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 13:19:15,087 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 13:19:15,196 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 13:19:15,297 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 13:19:39,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:19:39,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:19:47,756 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:19:54,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:19:54,603 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:19:56,766 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-07-21 13:19:58,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:19:58,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:01,341 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:01,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:02,877 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:02,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:04,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:04,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:04,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:04,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:05,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:05,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:05,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 13:20:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1917717 backedges. 5294 proven. 49914 refuted. 0 times theorem prover too weak. 1862509 trivial. 0 not checked. [2020-07-21 13:20:14,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314255416] [2020-07-21 13:20:14,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 13:20:14,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 13:20:14,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469885255] [2020-07-21 13:20:14,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 13:20:14,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 13:20:14,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 13:20:14,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 13:20:14,864 INFO L87 Difference]: Start difference. First operand 76 states and 234 transitions. Second operand 29 states. [2020-07-21 13:20:18,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 13:20:18,146 INFO L93 Difference]: Finished difference Result 137 states and 714 transitions. [2020-07-21 13:20:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 13:20:18,148 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 5620 [2020-07-21 13:20:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 13:20:18,158 INFO L225 Difference]: With dead ends: 137 [2020-07-21 13:20:18,158 INFO L226 Difference]: Without dead ends: 133 [2020-07-21 13:20:18,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11251 GetRequests, 11188 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 13:20:18,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-21 13:20:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 76. [2020-07-21 13:20:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-21 13:20:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-21 13:20:18,187 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 5620 [2020-07-21 13:20:18,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 13:20:18,190 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-21 13:20:18,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 13:20:18,191 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-21 13:20:19,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12689 [2020-07-21 13:20:19,330 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 13:20:19,334 INFO L422 BasicCegarLoop]: trace histogram [1951, 1951, 976, 975, 975, 975, 975, 975, 975, 975, 975, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 13:20:19,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 13:20:19,535 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 13:20:19,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 13:20:19,540 INFO L82 PathProgramCache]: Analyzing trace with hash -557008820, now seen corresponding path program 12 times [2020-07-21 13:20:19,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 13:20:19,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336117283] [2020-07-21 13:20:19,541 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 13:20:24,235 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 13:20:24,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 13:20:24,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 28305 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 13:20:24,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 13:21:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9983025 backedges. 12853 proven. 120863 refuted. 0 times theorem prover too weak. 9849309 trivial. 0 not checked. [2020-07-21 13:21:11,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 13:21:16,452 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:21:16,558 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:21:18,457 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:21:18,567 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:21:18,685 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 13:21:18,801 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 13:21:22,108 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 13:21:22,228 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 13:21:22,355 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:21:22,481 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:21:30,747 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 13:21:30,878 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 13:21:31,020 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 13:21:31,160 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 13:21:31,299 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 13:21:31,426 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 13:21:31,550 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 13:21:31,667 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 13:21:31,777 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 13:21:31,883 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 13:21:31,985 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 13:23:12,695 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 13:23:12,900 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 13:23:13,005 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 13:23:13,961 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-21 13:23:14,426 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 13:23:14,537 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 13:23:14,659 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 13:23:14,769 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 13:23:16,825 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 13:23:16,936 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 13:23:17,050 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:23:17,182 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 13:23:19,526 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:23:19,677 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 13:23:19,826 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 13:23:19,979 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 13:23:24,283 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 13:23:24,412 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 13:23:24,558 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:23:24,708 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:23:24,857 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 13:23:25,011 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 13:23:25,155 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 13:23:25,296 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 13:23:25,428 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 13:23:25,555 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 13:23:25,675 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 13:23:25,786 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 13:23:25,892 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 13:23:26,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts