/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_VARIABLES --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 15:48:15,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 15:48:15,184 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 15:48:15,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 15:48:15,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 15:48:15,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 15:48:15,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 15:48:15,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 15:48:15,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 15:48:15,225 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 15:48:15,226 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 15:48:15,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 15:48:15,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 15:48:15,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 15:48:15,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 15:48:15,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 15:48:15,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 15:48:15,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 15:48:15,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 15:48:15,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 15:48:15,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 15:48:15,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 15:48:15,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 15:48:15,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 15:48:15,255 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 15:48:15,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 15:48:15,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 15:48:15,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 15:48:15,267 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 15:48:15,302 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 15:48:15,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 15:48:15,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 15:48:15,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 15:48:15,307 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 15:48:15,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 15:48:15,307 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 15:48:15,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 15:48:15,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 15:48:15,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 15:48:15,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 15:48:15,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 15:48:15,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 15:48:15,309 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 15:48:15,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 15:48:15,310 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 15:48:15,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 15:48:15,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 15:48:15,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 15:48:15,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 15:48:15,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 15:48:15,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 15:48:15,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 15:48:15,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 15:48:15,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 15:48:15,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 15:48:15,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:15,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 15:48:15,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 15:48:15,313 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_VARIABLES 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 15:48:15,612 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 15:48:15,631 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 15:48:15,634 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 15:48:15,636 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 15:48:15,638 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 15:48:15,640 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2020-07-21 15:48:15,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/167414f17/a921af6c3d4d433a9517a77e7dcca01a/FLAGcd2d86869 [2020-07-21 15:48:16,162 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 15:48:16,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2020-07-21 15:48:16,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/167414f17/a921af6c3d4d433a9517a77e7dcca01a/FLAGcd2d86869 [2020-07-21 15:48:16,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/167414f17/a921af6c3d4d433a9517a77e7dcca01a [2020-07-21 15:48:16,573 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 15:48:16,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 15:48:16,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 15:48:16,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 15:48:16,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 15:48:16,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:48:16" (1/1) ... [2020-07-21 15:48:16,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@253ac404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:48:16, skipping insertion in model container [2020-07-21 15:48:16,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 03:48:16" (1/1) ... [2020-07-21 15:48:16,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 15:48:16,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 15:48:16,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:48:16,776 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 15:48:16,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 15:48:16,807 INFO L208 MainTranslator]: Completed translation [2020-07-21 15:48:16,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:48:16 WrapperNode [2020-07-21 15:48:16,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 15:48:16,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 15:48:16,808 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 15:48:16,808 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 15:48:16,819 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:48:16" (1/1) ... [2020-07-21 15:48:16,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:48:16" (1/1) ... [2020-07-21 15:48:16,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:48:16" (1/1) ... [2020-07-21 15:48:16,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:48:16" (1/1) ... [2020-07-21 15:48:16,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:48:16" (1/1) ... [2020-07-21 15:48:16,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:48:16" (1/1) ... [2020-07-21 15:48:16,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:48:16" (1/1) ... [2020-07-21 15:48:16,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 15:48:16,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 15:48:16,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 15:48:16,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 15:48:16,837 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:48:16" (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 15:48:16,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 15:48:16,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 15:48:16,984 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-21 15:48:16,984 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 15:48:16,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 15:48:16,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 15:48:16,984 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-21 15:48:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 15:48:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 15:48:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 15:48:17,165 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 15:48:17,165 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 15:48:17,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:48:17 BoogieIcfgContainer [2020-07-21 15:48:17,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 15:48:17,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 15:48:17,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 15:48:17,174 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 15:48:17,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 03:48:16" (1/3) ... [2020-07-21 15:48:17,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53041774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:48:17, skipping insertion in model container [2020-07-21 15:48:17,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 03:48:16" (2/3) ... [2020-07-21 15:48:17,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53041774 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 03:48:17, skipping insertion in model container [2020-07-21 15:48:17,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 03:48:17" (3/3) ... [2020-07-21 15:48:17,177 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_25-2.c [2020-07-21 15:48:17,185 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 15:48:17,191 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 15:48:17,203 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 15:48:17,226 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 15:48:17,226 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 15:48:17,227 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 15:48:17,227 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 15:48:17,227 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 15:48:17,227 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 15:48:17,227 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 15:48:17,227 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 15:48:17,245 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-21 15:48:17,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 15:48:17,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:17,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:17,255 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:17,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-21 15:48:17,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:17,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027382723] [2020-07-21 15:48:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:48:17,344 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:17,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:17,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:48:17,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:17,508 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 15:48:17,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:48:17,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027382723] [2020-07-21 15:48:17,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:48:17,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:48:17,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292072755] [2020-07-21 15:48:17,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:48:17,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:17,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:48:17,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:48:17,530 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-21 15:48:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:17,645 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-21 15:48:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:48:17,648 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 15:48:17,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:17,658 INFO L225 Difference]: With dead ends: 35 [2020-07-21 15:48:17,658 INFO L226 Difference]: Without dead ends: 21 [2020-07-21 15:48:17,662 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 15:48:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-21 15:48:17,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-21 15:48:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 15:48:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 15:48:17,751 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-21 15:48:17,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:17,752 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 15:48:17,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:48:17,752 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 15:48:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 15:48:17,756 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:17,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:17,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:17,972 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:17,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:17,974 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-21 15:48:17,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:17,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945144671] [2020-07-21 15:48:17,976 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 15:48:18,003 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:18,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:18,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 15:48:18,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:18,044 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 15:48:18,044 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 15:48:18,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945144671] [2020-07-21 15:48:18,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 15:48:18,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 15:48:18,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147671884] [2020-07-21 15:48:18,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 15:48:18,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:18,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 15:48:18,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 15:48:18,049 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-21 15:48:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:18,124 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-21 15:48:18,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 15:48:18,125 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 15:48:18,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:18,127 INFO L225 Difference]: With dead ends: 27 [2020-07-21 15:48:18,127 INFO L226 Difference]: Without dead ends: 23 [2020-07-21 15:48:18,128 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 15:48:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-21 15:48:18,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-21 15:48:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-21 15:48:18,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-21 15:48:18,137 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-21 15:48:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:18,138 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-21 15:48:18,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 15:48:18,138 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-21 15:48:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 15:48:18,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:18,140 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 15:48:18,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:18,356 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:18,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:18,357 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-21 15:48:18,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:18,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425294518] [2020-07-21 15:48:18,358 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 15:48:18,395 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:18,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:18,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:48:18,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:18,447 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 15:48:18,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:18,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:18,720 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 15:48:18,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425294518] [2020-07-21 15:48:18,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:18,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 15:48:18,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529793017] [2020-07-21 15:48:18,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:48:18,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:18,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:48:18,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:48:18,723 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-21 15:48:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:18,824 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-21 15:48:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:48:18,825 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-21 15:48:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:18,827 INFO L225 Difference]: With dead ends: 32 [2020-07-21 15:48:18,827 INFO L226 Difference]: Without dead ends: 28 [2020-07-21 15:48:18,828 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 15:48:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-21 15:48:18,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-21 15:48:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 15:48:18,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 15:48:18,838 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-21 15:48:18,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:18,839 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 15:48:18,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:48:18,839 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 15:48:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 15:48:18,841 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:18,842 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 15:48:19,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:19,056 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:19,057 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-21 15:48:19,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:19,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176829421] [2020-07-21 15:48:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:48:19,101 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:19,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 15:48:19,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:19,159 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 15:48:19,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:19,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:19,318 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 15:48:19,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176829421] [2020-07-21 15:48:19,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:19,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-21 15:48:19,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291797741] [2020-07-21 15:48:19,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 15:48:19,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 15:48:19,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-21 15:48:19,322 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-21 15:48:19,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:19,401 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-21 15:48:19,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 15:48:19,402 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-21 15:48:19,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:19,404 INFO L225 Difference]: With dead ends: 37 [2020-07-21 15:48:19,404 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 15:48:19,405 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 15:48:19,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 15:48:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-21 15:48:19,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-21 15:48:19,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-21 15:48:19,414 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-21 15:48:19,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:19,415 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-21 15:48:19,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 15:48:19,415 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-21 15:48:19,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 15:48:19,417 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:19,417 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 15:48:19,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:19,631 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:19,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:19,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-21 15:48:19,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:19,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650346679] [2020-07-21 15:48:19,633 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 15:48:19,673 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:19,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:19,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:48:19,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:19,746 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 15:48:19,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:19,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:19,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:20,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:20,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:20,106 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 15:48:20,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650346679] [2020-07-21 15:48:20,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:20,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 15:48:20,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173131239] [2020-07-21 15:48:20,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:48:20,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:20,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:48:20,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:48:20,109 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-21 15:48:20,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:20,277 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-21 15:48:20,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:48:20,277 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-21 15:48:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:20,279 INFO L225 Difference]: With dead ends: 42 [2020-07-21 15:48:20,280 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 15:48:20,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 15:48:20,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 15:48:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-21 15:48:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 15:48:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 15:48:20,295 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-21 15:48:20,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:20,295 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 15:48:20,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:48:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 15:48:20,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 15:48:20,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:20,298 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 15:48:20,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:20,501 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:20,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:20,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-21 15:48:20,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:20,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343369573] [2020-07-21 15:48:20,504 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 15:48:20,549 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:20,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:20,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 15:48:20,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:20,592 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 15:48:20,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:20,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:20,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:20,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:20,917 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 15:48:20,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343369573] [2020-07-21 15:48:20,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:20,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-21 15:48:20,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479059398] [2020-07-21 15:48:20,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-21 15:48:20,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:20,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-21 15:48:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-21 15:48:20,920 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-21 15:48:21,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:21,063 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-21 15:48:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 15:48:21,063 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-21 15:48:21,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:21,069 INFO L225 Difference]: With dead ends: 47 [2020-07-21 15:48:21,069 INFO L226 Difference]: Without dead ends: 43 [2020-07-21 15:48:21,070 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 15:48:21,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-21 15:48:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-21 15:48:21,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 15:48:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-21 15:48:21,096 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-21 15:48:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:21,097 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-21 15:48:21,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-21 15:48:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-21 15:48:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-21 15:48:21,105 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:21,106 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 15:48:21,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:21,307 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:21,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:21,308 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-21 15:48:21,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:21,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036766941] [2020-07-21 15:48:21,310 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 15:48:21,351 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:21,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:21,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:48:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:21,419 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 15:48:21,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:21,810 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:21,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:21,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:21,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:21,962 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:22,002 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 15:48:22,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036766941] [2020-07-21 15:48:22,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:22,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 15:48:22,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033785442] [2020-07-21 15:48:22,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 15:48:22,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:22,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 15:48:22,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:48:22,005 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-21 15:48:22,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:22,177 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-21 15:48:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:48:22,178 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-21 15:48:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:22,180 INFO L225 Difference]: With dead ends: 52 [2020-07-21 15:48:22,181 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 15:48:22,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:48:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 15:48:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-21 15:48:22,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-21 15:48:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-21 15:48:22,193 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-21 15:48:22,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:22,194 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-21 15:48:22,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 15:48:22,194 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-21 15:48:22,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-21 15:48:22,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:22,197 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 15:48:22,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:22,402 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:22,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:22,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-21 15:48:22,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:22,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384940298] [2020-07-21 15:48:22,404 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 15:48:22,451 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:48:22,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:22,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:48:22,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 171 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2020-07-21 15:48:22,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:23,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:23,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:23,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:23,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:23,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:23,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 115 proven. 193 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2020-07-21 15:48:23,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384940298] [2020-07-21 15:48:23,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:23,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 21 [2020-07-21 15:48:23,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618467011] [2020-07-21 15:48:23,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:48:23,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:23,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:48:23,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:48:23,822 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 21 states. [2020-07-21 15:48:24,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:24,411 INFO L93 Difference]: Finished difference Result 94 states and 184 transitions. [2020-07-21 15:48:24,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-21 15:48:24,412 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-07-21 15:48:24,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:24,414 INFO L225 Difference]: With dead ends: 94 [2020-07-21 15:48:24,414 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 15:48:24,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 164 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=351, Invalid=981, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:48:24,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 15:48:24,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2020-07-21 15:48:24,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 15:48:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2020-07-21 15:48:24,428 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 96 [2020-07-21 15:48:24,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:24,428 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2020-07-21 15:48:24,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:48:24,429 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2020-07-21 15:48:24,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-21 15:48:24,431 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:24,431 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:24,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:24,645 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:24,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2001184551, now seen corresponding path program 4 times [2020-07-21 15:48:24,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:24,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621744561] [2020-07-21 15:48:24,646 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 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 15:48:24,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:24,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:24,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 15:48:24,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:24,754 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-07-21 15:48:24,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:25,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:25,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:25,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 17 proven. 103 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-07-21 15:48:25,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621744561] [2020-07-21 15:48:25,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:25,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-21 15:48:25,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90000496] [2020-07-21 15:48:25,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-21 15:48:25,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:25,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-21 15:48:25,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-21 15:48:25,254 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand 13 states. [2020-07-21 15:48:25,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:25,378 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2020-07-21 15:48:25,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 15:48:25,378 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-07-21 15:48:25,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:25,380 INFO L225 Difference]: With dead ends: 65 [2020-07-21 15:48:25,380 INFO L226 Difference]: Without dead ends: 61 [2020-07-21 15:48:25,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 116 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:48:25,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-21 15:48:25,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-07-21 15:48:25,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-21 15:48:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-07-21 15:48:25,390 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 68 [2020-07-21 15:48:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:25,390 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-07-21 15:48:25,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-21 15:48:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-07-21 15:48:25,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-21 15:48:25,392 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:25,393 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 7, 7, 7, 7, 7, 7, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:25,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:25,596 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:25,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:25,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1200034344, now seen corresponding path program 5 times [2020-07-21 15:48:25,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:25,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256864952] [2020-07-21 15:48:25,599 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 15:48:25,661 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:25,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:25,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 15:48:25,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 229 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2020-07-21 15:48:25,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:26,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:26,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:26,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:26,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:26,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 42 proven. 255 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-07-21 15:48:26,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256864952] [2020-07-21 15:48:26,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:26,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-21 15:48:26,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823407067] [2020-07-21 15:48:26,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 15:48:26,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:26,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 15:48:26,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-21 15:48:26,674 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 15 states. [2020-07-21 15:48:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:26,827 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2020-07-21 15:48:26,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 15:48:26,828 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 109 [2020-07-21 15:48:26,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:26,829 INFO L225 Difference]: With dead ends: 68 [2020-07-21 15:48:26,829 INFO L226 Difference]: Without dead ends: 64 [2020-07-21 15:48:26,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 194 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 15:48:26,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-07-21 15:48:26,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-07-21 15:48:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-07-21 15:48:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-07-21 15:48:26,851 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 109 [2020-07-21 15:48:26,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:26,852 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-07-21 15:48:26,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 15:48:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-07-21 15:48:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-07-21 15:48:26,857 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:26,858 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 25, 15, 15, 15, 15, 15, 15, 15, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:27,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:27,072 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:27,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash 706081956, now seen corresponding path program 6 times [2020-07-21 15:48:27,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:27,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300498302] [2020-07-21 15:48:27,073 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 15:48:27,155 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:48:27,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:27,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:48:27,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 839 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2020-07-21 15:48:27,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:28,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:28,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:28,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:28,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:28,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:29,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:29,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:29,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:29,724 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:29,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:29,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:29,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2580 backedges. 463 proven. 891 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2020-07-21 15:48:29,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300498302] [2020-07-21 15:48:29,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:29,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23] total 25 [2020-07-21 15:48:29,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028123466] [2020-07-21 15:48:29,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 15:48:29,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:29,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 15:48:29,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-07-21 15:48:29,851 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 25 states. [2020-07-21 15:48:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:30,614 INFO L93 Difference]: Finished difference Result 144 states and 221 transitions. [2020-07-21 15:48:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-21 15:48:30,615 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 218 [2020-07-21 15:48:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:30,617 INFO L225 Difference]: With dead ends: 144 [2020-07-21 15:48:30,618 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 15:48:30,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 391 SyntacticMatches, 21 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=539, Invalid=1531, Unknown=0, NotChecked=0, Total=2070 [2020-07-21 15:48:30,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 15:48:30,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-07-21 15:48:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-21 15:48:30,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 102 transitions. [2020-07-21 15:48:30,631 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 102 transitions. Word has length 218 [2020-07-21 15:48:30,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:30,632 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 102 transitions. [2020-07-21 15:48:30,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 15:48:30,632 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 102 transitions. [2020-07-21 15:48:30,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-21 15:48:30,634 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:30,634 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:30,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:30,849 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:30,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:30,850 INFO L82 PathProgramCache]: Analyzing trace with hash 259499213, now seen corresponding path program 7 times [2020-07-21 15:48:30,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:30,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373681201] [2020-07-21 15:48:30,851 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 15:48:30,983 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:30,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:30,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 15:48:30,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 533 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2020-07-21 15:48:31,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:31,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:31,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:32,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:32,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:32,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:32,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:32,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 93 proven. 573 refuted. 0 times theorem prover too weak. 988 trivial. 0 not checked. [2020-07-21 15:48:32,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373681201] [2020-07-21 15:48:32,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:32,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-21 15:48:32,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930313069] [2020-07-21 15:48:32,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 15:48:32,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:32,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 15:48:32,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-21 15:48:32,579 INFO L87 Difference]: Start difference. First operand 78 states and 102 transitions. Second operand 17 states. [2020-07-21 15:48:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:32,805 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2020-07-21 15:48:32,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 15:48:32,806 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 177 [2020-07-21 15:48:32,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:32,807 INFO L225 Difference]: With dead ends: 85 [2020-07-21 15:48:32,807 INFO L226 Difference]: Without dead ends: 81 [2020-07-21 15:48:32,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 326 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:48:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-21 15:48:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-21 15:48:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-21 15:48:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-07-21 15:48:32,818 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 177 [2020-07-21 15:48:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:32,819 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-07-21 15:48:32,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 15:48:32,819 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-07-21 15:48:32,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-21 15:48:32,823 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:32,823 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 20, 20, 20, 20, 20, 20, 20, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:33,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:33,037 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:33,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1425621089, now seen corresponding path program 8 times [2020-07-21 15:48:33,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:33,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418880962] [2020-07-21 15:48:33,039 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 15:48:33,202 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:33,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:33,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 15:48:33,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:33,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1130 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2020-07-21 15:48:33,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:34,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:34,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:35,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4568 backedges. 189 proven. 1187 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2020-07-21 15:48:35,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418880962] [2020-07-21 15:48:35,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:35,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-21 15:48:35,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324365628] [2020-07-21 15:48:35,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 15:48:35,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:35,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 15:48:35,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-21 15:48:35,908 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 19 states. [2020-07-21 15:48:36,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:36,191 INFO L93 Difference]: Finished difference Result 90 states and 124 transitions. [2020-07-21 15:48:36,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 15:48:36,192 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 286 [2020-07-21 15:48:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:36,195 INFO L225 Difference]: With dead ends: 90 [2020-07-21 15:48:36,195 INFO L226 Difference]: Without dead ends: 86 [2020-07-21 15:48:36,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 540 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-21 15:48:36,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-07-21 15:48:36,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-07-21 15:48:36,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-07-21 15:48:36,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 120 transitions. [2020-07-21 15:48:36,206 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 120 transitions. Word has length 286 [2020-07-21 15:48:36,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:36,206 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 120 transitions. [2020-07-21 15:48:36,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 15:48:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 120 transitions. [2020-07-21 15:48:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2020-07-21 15:48:36,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:36,210 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 59, 36, 36, 36, 36, 36, 36, 36, 23, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:36,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:36,423 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:36,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:36,424 INFO L82 PathProgramCache]: Analyzing trace with hash -350328107, now seen corresponding path program 9 times [2020-07-21 15:48:36,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:36,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36596226] [2020-07-21 15:48:36,425 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 15:48:36,621 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:48:36,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:36,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 754 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 15:48:36,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:36,892 INFO L134 CoverageAnalysis]: Checked inductivity of 14743 backedges. 7742 proven. 1596 refuted. 0 times theorem prover too weak. 5405 trivial. 0 not checked. [2020-07-21 15:48:36,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:39,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:40,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:40,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:40,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:40,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:40,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:40,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:40,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:41,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:41,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:41,893 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:41,894 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:42,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:42,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:42,161 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:42,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:42,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14743 backedges. 1220 proven. 3406 refuted. 0 times theorem prover too weak. 10117 trivial. 0 not checked. [2020-07-21 15:48:42,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36596226] [2020-07-21 15:48:42,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:42,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 27] total 29 [2020-07-21 15:48:42,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099180123] [2020-07-21 15:48:42,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 15:48:42,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:42,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 15:48:42,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:48:42,381 INFO L87 Difference]: Start difference. First operand 86 states and 120 transitions. Second operand 29 states. [2020-07-21 15:48:43,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:43,549 INFO L93 Difference]: Finished difference Result 187 states and 314 transitions. [2020-07-21 15:48:43,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-21 15:48:43,549 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 504 [2020-07-21 15:48:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:43,552 INFO L225 Difference]: With dead ends: 187 [2020-07-21 15:48:43,552 INFO L226 Difference]: Without dead ends: 109 [2020-07-21 15:48:43,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1033 GetRequests, 955 SyntacticMatches, 25 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2020-07-21 15:48:43,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-07-21 15:48:43,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-07-21 15:48:43,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-21 15:48:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 135 transitions. [2020-07-21 15:48:43,579 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 135 transitions. Word has length 504 [2020-07-21 15:48:43,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:43,580 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 135 transitions. [2020-07-21 15:48:43,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 15:48:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 135 transitions. [2020-07-21 15:48:43,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 15:48:43,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:43,585 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 54, 33, 33, 33, 33, 33, 33, 33, 21, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:43,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:43,800 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:43,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:43,800 INFO L82 PathProgramCache]: Analyzing trace with hash -229001048, now seen corresponding path program 10 times [2020-07-21 15:48:43,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:43,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494370857] [2020-07-21 15:48:43,801 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 15:48:44,100 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:48:44,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:44,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 15:48:44,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2270 refuted. 0 times theorem prover too weak. 9756 trivial. 0 not checked. [2020-07-21 15:48:44,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:46,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:46,511 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:47,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:47,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:47,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:47,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:48,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:48,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:48,286 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:48,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:48,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:48,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12387 backedges. 361 proven. 2347 refuted. 0 times theorem prover too weak. 9679 trivial. 0 not checked. [2020-07-21 15:48:48,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494370857] [2020-07-21 15:48:48,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:48:48,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-21 15:48:48,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12356787] [2020-07-21 15:48:48,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 15:48:48,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:48:48,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 15:48:48,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-21 15:48:48,480 INFO L87 Difference]: Start difference. First operand 98 states and 135 transitions. Second operand 21 states. [2020-07-21 15:48:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:48:48,838 INFO L93 Difference]: Finished difference Result 107 states and 153 transitions. [2020-07-21 15:48:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 15:48:48,839 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 463 [2020-07-21 15:48:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:48:48,842 INFO L225 Difference]: With dead ends: 107 [2020-07-21 15:48:48,843 INFO L226 Difference]: Without dead ends: 103 [2020-07-21 15:48:48,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 890 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:48:48,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-21 15:48:48,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-07-21 15:48:48,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-21 15:48:48,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 149 transitions. [2020-07-21 15:48:48,853 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 149 transitions. Word has length 463 [2020-07-21 15:48:48,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:48:48,854 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 149 transitions. [2020-07-21 15:48:48,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 15:48:48,854 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 149 transitions. [2020-07-21 15:48:48,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 995 [2020-07-21 15:48:48,863 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:48:48,864 INFO L422 BasicCegarLoop]: trace histogram [145, 145, 117, 72, 72, 72, 72, 72, 72, 72, 45, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:48:49,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:48:49,076 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:48:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:48:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash -928557949, now seen corresponding path program 11 times [2020-07-21 15:48:49,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:48:49,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578489665] [2020-07-21 15:48:49,078 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 15:48:49,456 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:48:49,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:48:49,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 1485 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 15:48:49,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:48:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 58770 backedges. 29376 proven. 4650 refuted. 0 times theorem prover too weak. 24744 trivial. 0 not checked. [2020-07-21 15:48:50,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:48:56,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:56,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:56,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:57,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:57,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:57,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:57,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:58,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:58,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:59,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:48:59,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:00,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:00,180 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:00,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:00,480 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:00,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:00,768 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:00,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:00,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 58770 backedges. 2815 proven. 9221 refuted. 0 times theorem prover too weak. 46734 trivial. 0 not checked. [2020-07-21 15:49:01,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578489665] [2020-07-21 15:49:01,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:49:01,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 33] total 37 [2020-07-21 15:49:01,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911846354] [2020-07-21 15:49:01,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-21 15:49:01,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:01,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-21 15:49:01,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2020-07-21 15:49:01,330 INFO L87 Difference]: Start difference. First operand 103 states and 149 transitions. Second operand 37 states. [2020-07-21 15:49:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:03,540 INFO L93 Difference]: Finished difference Result 257 states and 498 transitions. [2020-07-21 15:49:03,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-21 15:49:03,541 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 994 [2020-07-21 15:49:03,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:03,546 INFO L225 Difference]: With dead ends: 257 [2020-07-21 15:49:03,546 INFO L226 Difference]: Without dead ends: 162 [2020-07-21 15:49:03,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2023 GetRequests, 1923 SyntacticMatches, 29 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1231, Invalid=4025, Unknown=0, NotChecked=0, Total=5256 [2020-07-21 15:49:03,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-21 15:49:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 129. [2020-07-21 15:49:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-21 15:49:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 186 transitions. [2020-07-21 15:49:03,567 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 186 transitions. Word has length 994 [2020-07-21 15:49:03,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:03,568 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 186 transitions. [2020-07-21 15:49:03,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-21 15:49:03,568 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 186 transitions. [2020-07-21 15:49:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2020-07-21 15:49:03,605 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:03,606 INFO L422 BasicCegarLoop]: trace histogram [109, 109, 88, 54, 54, 54, 54, 54, 54, 54, 34, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:03,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:03,807 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:03,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:03,808 INFO L82 PathProgramCache]: Analyzing trace with hash -127293739, now seen corresponding path program 12 times [2020-07-21 15:49:03,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:03,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706332346] [2020-07-21 15:49:03,809 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 15:49:04,286 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:49:04,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:04,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 15:49:04,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 659 proven. 4380 refuted. 0 times theorem prover too weak. 28057 trivial. 0 not checked. [2020-07-21 15:49:04,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:08,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:09,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:10,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:10,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:10,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:11,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:11,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:11,406 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:11,508 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:11,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 33096 backedges. 659 proven. 4480 refuted. 0 times theorem prover too weak. 27957 trivial. 0 not checked. [2020-07-21 15:49:11,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706332346] [2020-07-21 15:49:11,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:49:11,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-21 15:49:11,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361013743] [2020-07-21 15:49:11,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 15:49:11,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:11,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 15:49:11,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-21 15:49:11,829 INFO L87 Difference]: Start difference. First operand 129 states and 186 transitions. Second operand 23 states. [2020-07-21 15:49:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:12,147 INFO L93 Difference]: Finished difference Result 136 states and 198 transitions. [2020-07-21 15:49:12,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 15:49:12,148 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 749 [2020-07-21 15:49:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:12,151 INFO L225 Difference]: With dead ends: 136 [2020-07-21 15:49:12,151 INFO L226 Difference]: Without dead ends: 132 [2020-07-21 15:49:12,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1506 GetRequests, 1458 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-21 15:49:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-07-21 15:49:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-07-21 15:49:12,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-21 15:49:12,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 194 transitions. [2020-07-21 15:49:12,164 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 194 transitions. Word has length 749 [2020-07-21 15:49:12,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:12,165 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 194 transitions. [2020-07-21 15:49:12,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 15:49:12,166 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 194 transitions. [2020-07-21 15:49:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2098 [2020-07-21 15:49:12,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:12,200 INFO L422 BasicCegarLoop]: trace histogram [307, 307, 248, 153, 153, 153, 153, 153, 153, 153, 95, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:12,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:12,415 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:12,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:12,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1575583038, now seen corresponding path program 13 times [2020-07-21 15:49:12,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:12,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720782680] [2020-07-21 15:49:12,418 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 15:49:13,169 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:49:13,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:13,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 3127 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-21 15:49:13,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 265024 backedges. 11579 proven. 25169 refuted. 0 times theorem prover too weak. 228276 trivial. 0 not checked. [2020-07-21 15:49:15,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:49:22,444 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-07-21 15:49:27,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:30,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:33,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:33,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:35,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:37,166 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:38,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:39,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:40,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:40,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:40,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:40,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:40,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:40,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:40,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:40,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:45,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:45,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:46,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:46,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:47,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:47,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:48,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:48,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:48,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:49,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:49,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:49,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:49,351 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:49:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 265024 backedges. 11579 proven. 25491 refuted. 0 times theorem prover too weak. 227954 trivial. 0 not checked. [2020-07-21 15:49:51,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720782680] [2020-07-21 15:49:51,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:49:51,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 47] total 51 [2020-07-21 15:49:51,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915162121] [2020-07-21 15:49:51,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-21 15:49:51,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:49:51,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-21 15:49:51,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2165, Unknown=0, NotChecked=0, Total=2550 [2020-07-21 15:49:51,091 INFO L87 Difference]: Start difference. First operand 132 states and 194 transitions. Second operand 51 states. [2020-07-21 15:49:57,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:49:57,341 INFO L93 Difference]: Finished difference Result 415 states and 1048 transitions. [2020-07-21 15:49:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-07-21 15:49:57,343 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 2097 [2020-07-21 15:49:57,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:49:57,351 INFO L225 Difference]: With dead ends: 415 [2020-07-21 15:49:57,351 INFO L226 Difference]: Without dead ends: 289 [2020-07-21 15:49:57,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4251 GetRequests, 4101 SyntacticMatches, 43 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3181 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2775, Invalid=8997, Unknown=0, NotChecked=0, Total=11772 [2020-07-21 15:49:57,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-07-21 15:49:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 218. [2020-07-21 15:49:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-21 15:49:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 372 transitions. [2020-07-21 15:49:57,396 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 372 transitions. Word has length 2097 [2020-07-21 15:49:57,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:49:57,397 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 372 transitions. [2020-07-21 15:49:57,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-21 15:49:57,397 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 372 transitions. [2020-07-21 15:49:57,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1213 [2020-07-21 15:49:57,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:49:57,412 INFO L422 BasicCegarLoop]: trace histogram [177, 177, 143, 88, 88, 88, 88, 88, 88, 88, 55, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:49:57,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:49:57,628 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:49:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:49:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash 452920407, now seen corresponding path program 14 times [2020-07-21 15:49:57,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:49:57,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68821173] [2020-07-21 15:49:57,629 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 15:49:58,613 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:49:58,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:49:58,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 2692 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-21 15:49:58,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:49:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 1164 proven. 8218 refuted. 0 times theorem prover too weak. 78387 trivial. 0 not checked. [2020-07-21 15:49:59,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:50:05,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:07,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:07,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:09,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:09,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:10,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:10,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:10,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:11,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:11,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:11,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:11,374 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:11,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:11,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:11,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:11,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 87769 backedges. 1164 proven. 8344 refuted. 0 times theorem prover too weak. 78261 trivial. 0 not checked. [2020-07-21 15:50:12,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68821173] [2020-07-21 15:50:12,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:50:12,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-21 15:50:12,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968391124] [2020-07-21 15:50:12,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-21 15:50:12,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:50:12,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-21 15:50:12,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-21 15:50:12,201 INFO L87 Difference]: Start difference. First operand 218 states and 372 transitions. Second operand 25 states. [2020-07-21 15:50:12,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:50:12,748 INFO L93 Difference]: Finished difference Result 222 states and 375 transitions. [2020-07-21 15:50:12,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 15:50:12,749 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 1212 [2020-07-21 15:50:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:50:12,753 INFO L225 Difference]: With dead ends: 222 [2020-07-21 15:50:12,753 INFO L226 Difference]: Without dead ends: 218 [2020-07-21 15:50:12,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2433 GetRequests, 2380 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-21 15:50:12,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-07-21 15:50:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-07-21 15:50:12,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-07-21 15:50:12,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 371 transitions. [2020-07-21 15:50:12,771 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 371 transitions. Word has length 1212 [2020-07-21 15:50:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:50:12,772 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 371 transitions. [2020-07-21 15:50:12,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-21 15:50:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 371 transitions. [2020-07-21 15:50:12,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1962 [2020-07-21 15:50:12,802 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:50:12,803 INFO L422 BasicCegarLoop]: trace histogram [287, 287, 232, 143, 143, 143, 143, 143, 143, 143, 89, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:50:13,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:50:13,017 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:50:13,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:50:13,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1868832152, now seen corresponding path program 15 times [2020-07-21 15:50:13,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:50:13,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034987501] [2020-07-21 15:50:13,020 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 15:50:14,084 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:50:14,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:50:14,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 4355 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-21 15:50:14,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:50:15,777 INFO L134 CoverageAnalysis]: Checked inductivity of 231572 backedges. 2007 proven. 15097 refuted. 0 times theorem prover too weak. 214468 trivial. 0 not checked. [2020-07-21 15:50:15,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:50:23,394 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 15:50:25,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:28,976 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:31,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:33,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:34,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:34,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:34,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:34,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:35,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:35,121 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:35,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:35,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:35,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:35,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:35,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:50:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 231572 backedges. 2007 proven. 15252 refuted. 0 times theorem prover too weak. 214313 trivial. 0 not checked. [2020-07-21 15:50:36,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034987501] [2020-07-21 15:50:36,946 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:50:36,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-21 15:50:36,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636149819] [2020-07-21 15:50:36,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-21 15:50:36,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:50:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-21 15:50:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-21 15:50:36,950 INFO L87 Difference]: Start difference. First operand 218 states and 371 transitions. Second operand 27 states. [2020-07-21 15:50:37,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:50:37,523 INFO L93 Difference]: Finished difference Result 225 states and 390 transitions. [2020-07-21 15:50:37,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-21 15:50:37,525 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 1961 [2020-07-21 15:50:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:50:37,532 INFO L225 Difference]: With dead ends: 225 [2020-07-21 15:50:37,532 INFO L226 Difference]: Without dead ends: 221 [2020-07-21 15:50:37,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3932 GetRequests, 3874 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 15:50:37,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-07-21 15:50:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2020-07-21 15:50:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2020-07-21 15:50:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 384 transitions. [2020-07-21 15:50:37,550 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 384 transitions. Word has length 1961 [2020-07-21 15:50:37,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:50:37,551 INFO L479 AbstractCegarLoop]: Abstraction has 221 states and 384 transitions. [2020-07-21 15:50:37,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-21 15:50:37,552 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 384 transitions. [2020-07-21 15:50:37,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4386 [2020-07-21 15:50:37,673 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:50:37,674 INFO L422 BasicCegarLoop]: trace histogram [643, 643, 520, 321, 321, 321, 321, 321, 321, 321, 199, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:50:37,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:50:37,883 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:50:37,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:50:37,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1809736744, now seen corresponding path program 16 times [2020-07-21 15:50:37,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:50:37,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199194424] [2020-07-21 15:50:37,886 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 15:50:39,418 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 15:50:39,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:50:39,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 6536 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-21 15:50:39,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:50:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1165992 backedges. 23222 proven. 56314 refuted. 0 times theorem prover too weak. 1086456 trivial. 0 not checked. [2020-07-21 15:50:46,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:51:07,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:12,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:12,016 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:14,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:14,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:16,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:17,891 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:17,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:18,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:19,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:19,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:19,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:19,486 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:19,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:19,600 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:23,283 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:51:31,575 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:36,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:39,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:39,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:42,115 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:42,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:43,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:44,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:44,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:45,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:45,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:45,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:45,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:45,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:45,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:51:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1165992 backedges. 23222 proven. 56624 refuted. 0 times theorem prover too weak. 1086146 trivial. 0 not checked. [2020-07-21 15:51:52,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199194424] [2020-07-21 15:51:52,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:51:52,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 47] total 49 [2020-07-21 15:51:52,933 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847848898] [2020-07-21 15:51:52,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-21 15:51:52,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:51:52,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-21 15:51:52,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=1993, Unknown=0, NotChecked=0, Total=2352 [2020-07-21 15:51:52,937 INFO L87 Difference]: Start difference. First operand 221 states and 384 transitions. Second operand 49 states. [2020-07-21 15:51:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:51:58,452 INFO L93 Difference]: Finished difference Result 482 states and 856 transitions. [2020-07-21 15:51:58,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-07-21 15:51:58,454 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 4385 [2020-07-21 15:51:58,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:51:58,461 INFO L225 Difference]: With dead ends: 482 [2020-07-21 15:51:58,461 INFO L226 Difference]: Without dead ends: 269 [2020-07-21 15:51:58,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8820 GetRequests, 8677 SyntacticMatches, 45 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2267, Invalid=7633, Unknown=0, NotChecked=0, Total=9900 [2020-07-21 15:51:58,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-21 15:51:58,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 205. [2020-07-21 15:51:58,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-21 15:51:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 326 transitions. [2020-07-21 15:51:58,485 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 326 transitions. Word has length 4385 [2020-07-21 15:51:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:51:58,487 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 326 transitions. [2020-07-21 15:51:58,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-21 15:51:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 326 transitions. [2020-07-21 15:51:58,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3174 [2020-07-21 15:51:58,562 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:51:58,563 INFO L422 BasicCegarLoop]: trace histogram [465, 465, 376, 232, 232, 232, 232, 232, 232, 232, 144, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:51:58,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:51:58,777 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:51:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:51:58,778 INFO L82 PathProgramCache]: Analyzing trace with hash -740538915, now seen corresponding path program 17 times [2020-07-21 15:51:58,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:51:58,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914579212] [2020-07-21 15:51:58,779 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 15:52:00,404 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:52:00,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:52:00,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 7046 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-21 15:52:00,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:52:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 609204 backedges. 3400 proven. 27297 refuted. 0 times theorem prover too weak. 578507 trivial. 0 not checked. [2020-07-21 15:52:04,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:52:09,560 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:52:09,662 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:52:09,770 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 15:52:09,878 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 15:52:09,984 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 15:52:24,496 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:52:24,698 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:52:26,105 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:52:27,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:27,117 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:36,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:43,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:43,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:48,242 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:48,243 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:51,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:53,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:54,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:54,780 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:55,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:55,738 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:55,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:55,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:56,088 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:56,089 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:52:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 609204 backedges. 3400 proven. 27484 refuted. 0 times theorem prover too weak. 578320 trivial. 0 not checked. [2020-07-21 15:52:59,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914579212] [2020-07-21 15:52:59,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:52:59,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-21 15:52:59,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815167585] [2020-07-21 15:52:59,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-21 15:52:59,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:52:59,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-21 15:52:59,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-21 15:52:59,343 INFO L87 Difference]: Start difference. First operand 205 states and 326 transitions. Second operand 29 states. [2020-07-21 15:53:00,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:53:00,120 INFO L93 Difference]: Finished difference Result 209 states and 329 transitions. [2020-07-21 15:53:00,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-21 15:53:00,127 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 3173 [2020-07-21 15:53:00,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:53:00,131 INFO L225 Difference]: With dead ends: 209 [2020-07-21 15:53:00,131 INFO L226 Difference]: Without dead ends: 205 [2020-07-21 15:53:00,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6357 GetRequests, 6294 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-21 15:53:00,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-21 15:53:00,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2020-07-21 15:53:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-21 15:53:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 325 transitions. [2020-07-21 15:53:00,150 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 325 transitions. Word has length 3173 [2020-07-21 15:53:00,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:53:00,152 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 325 transitions. [2020-07-21 15:53:00,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-21 15:53:00,152 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 325 transitions. [2020-07-21 15:53:00,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5135 [2020-07-21 15:53:00,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:53:00,288 INFO L422 BasicCegarLoop]: trace histogram [753, 753, 609, 376, 376, 376, 376, 376, 376, 376, 233, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:53:00,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:53:00,489 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:53:00,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:53:00,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1603623985, now seen corresponding path program 18 times [2020-07-21 15:53:00,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:53:00,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856669321] [2020-07-21 15:53:00,492 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 15:53:02,815 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:53:02,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:53:02,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 11400 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-21 15:53:02,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:53:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1599648 backedges. 5686 proven. 48748 refuted. 0 times theorem prover too weak. 1545214 trivial. 0 not checked. [2020-07-21 15:53:11,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:53:15,842 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:53:15,948 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:53:16,077 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:53:16,204 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:53:18,157 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:53:18,287 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:53:18,427 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:53:18,559 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:53:21,861 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:53:22,008 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:53:22,143 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:53:22,279 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:53:22,419 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-21 15:53:22,541 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 15:53:22,658 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 15:53:22,765 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 15:53:22,878 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 15:53:22,985 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 15:53:51,530 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:53:51,636 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:53:51,748 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:53:51,866 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:53:52,693 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:53:52,815 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:53:52,944 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:53:53,074 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:53:54,485 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:53:54,630 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:53:54,779 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:53:56,647 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:53:56,796 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:53:56,958 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:53:57,120 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:53:59,351 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:53:59,491 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:53:59,654 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:53:59,814 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:53:59,991 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 15:54:00,151 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 15:54:00,303 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:54:00,447 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 15:54:00,586 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:54:00,715 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:54:00,839 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 15:54:00,944 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:54:01,046 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:54:01,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:01,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:19,421 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:54:19,532 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:54:19,645 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:54:19,755 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:54:20,814 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:54:20,932 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:54:21,128 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:54:22,790 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:54:22,922 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:54:23,060 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:54:23,194 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:54:23,330 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:54:23,455 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 15:54:23,561 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:54:23,765 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:54:23,872 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:54:24,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:24,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:35,253 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:54:35,355 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:54:35,563 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:54:36,550 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:54:36,668 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:54:36,803 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:54:36,921 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:54:37,039 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:54:37,155 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:54:37,259 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:54:37,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:37,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:45,522 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:54:45,632 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:54:45,746 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:54:45,870 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:54:45,988 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:54:46,098 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:54:46,700 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:46,701 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:53,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:56,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:56,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:58,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:54:59,043 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-07-21 15:55:00,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:55:01,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:55:01,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:55:01,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:55:01,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:55:02,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:55:02,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:55:02,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:55:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1599648 backedges. 5686 proven. 48970 refuted. 0 times theorem prover too weak. 1544992 trivial. 0 not checked. [2020-07-21 15:55:11,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856669321] [2020-07-21 15:55:11,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:55:11,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 29] total 31 [2020-07-21 15:55:11,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880893620] [2020-07-21 15:55:11,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-21 15:55:11,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:55:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-21 15:55:11,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2020-07-21 15:55:11,399 INFO L87 Difference]: Start difference. First operand 205 states and 325 transitions. Second operand 31 states. [2020-07-21 15:55:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:55:12,777 INFO L93 Difference]: Finished difference Result 212 states and 342 transitions. [2020-07-21 15:55:12,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 15:55:12,785 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 5134 [2020-07-21 15:55:12,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:55:12,794 INFO L225 Difference]: With dead ends: 212 [2020-07-21 15:55:12,795 INFO L226 Difference]: Without dead ends: 208 [2020-07-21 15:55:12,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10280 GetRequests, 10212 SyntacticMatches, 26 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=619, Invalid=1273, Unknown=0, NotChecked=0, Total=1892 [2020-07-21 15:55:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-21 15:55:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2020-07-21 15:55:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-21 15:55:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-07-21 15:55:12,812 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 5134 [2020-07-21 15:55:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:55:12,816 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-07-21 15:55:12,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-21 15:55:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-07-21 15:55:13,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8308 [2020-07-21 15:55:13,666 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:55:13,671 INFO L422 BasicCegarLoop]: trace histogram [1219, 1219, 986, 609, 609, 609, 609, 609, 609, 609, 377, 233, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:55:13,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:55:13,885 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:55:13,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:55:13,889 INFO L82 PathProgramCache]: Analyzing trace with hash -497867032, now seen corresponding path program 19 times [2020-07-21 15:55:13,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:55:13,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573010434] [2020-07-21 15:55:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:55:17,402 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:55:17,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:55:17,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 18445 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-21 15:55:17,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 15:55:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4195633 backedges. 9420 proven. 86206 refuted. 0 times theorem prover too weak. 4100007 trivial. 0 not checked. [2020-07-21 15:55:40,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 15:55:43,144 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:55:43,257 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:55:43,374 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:55:43,489 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:55:44,299 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:55:44,418 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:55:44,547 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:55:44,675 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:55:45,949 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:55:46,083 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:55:46,218 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:55:46,352 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:55:48,328 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:55:48,435 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:55:48,581 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:55:48,721 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:55:50,642 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:55:50,756 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:55:50,908 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:55:51,032 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:55:56,527 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:55:56,702 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:55:56,897 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 15:55:57,084 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 15:56:04,932 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:56:05,060 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:56:05,196 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 15:56:05,343 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 15:56:05,548 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 15:56:05,755 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-07-21 15:56:05,923 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 15:56:06,081 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 15:56:06,292 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 15:56:06,511 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-07-21 15:56:06,700 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:56:06,876 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 15:56:07,046 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 15:56:07,200 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:56:07,353 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 15:56:07,500 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:56:07,632 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:56:07,755 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 15:56:07,875 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:56:07,979 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-21 15:57:10,043 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:57:10,252 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:57:10,360 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:57:11,398 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:57:11,520 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:57:11,644 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:57:11,772 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:57:13,672 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:57:13,778 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:57:13,906 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:57:14,037 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:57:15,750 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:57:15,855 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:57:15,974 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:57:16,112 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:57:20,466 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:57:20,583 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 15:57:20,706 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 15:57:20,840 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 15:57:21,056 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 15:57:21,217 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-07-21 15:57:21,376 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 15:57:21,528 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 15:57:21,671 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:57:21,805 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 15:57:21,933 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-21 15:57:22,053 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 15:57:22,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:22,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:57:56,814 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:57:56,917 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:57:57,025 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:57:57,140 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:57:58,389 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:57:58,513 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:57:58,678 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:57:58,855 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:58:00,861 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:58:00,984 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:58:01,111 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:58:01,251 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:58:03,043 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:58:03,149 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:58:03,269 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:58:03,415 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:58:03,535 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-21 15:58:03,659 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-21 15:58:03,800 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:58:03,940 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 15:58:04,064 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:58:04,184 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-21 15:58:04,295 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-21 15:58:05,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:26,534 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:58:26,649 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:58:26,763 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:58:27,967 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:58:28,102 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:58:28,241 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:58:28,376 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:58:30,514 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:58:30,657 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:58:30,810 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:58:30,961 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 15:58:31,102 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 15:58:31,241 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-21 15:58:31,371 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:58:31,495 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:58:31,605 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:58:31,714 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 15:58:32,385 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:32,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:43,868 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:58:44,075 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:58:44,185 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:58:45,001 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:58:45,114 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:58:45,232 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:58:45,349 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:58:46,675 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:58:46,798 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 15:58:46,935 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:58:47,066 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:58:47,200 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 15:58:47,323 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-21 15:58:47,442 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:58:47,553 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2020-07-21 15:58:47,659 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 15:58:48,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:58:55,183 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 15:58:55,299 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 15:58:55,415 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 15:58:55,884 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 15:58:55,991 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 15:58:56,115 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:58:56,231 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:58:56,865 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:58:56,980 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 15:58:57,110 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:58:57,253 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 15:58:58,385 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:58:58,532 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 15:58:58,679 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:58:58,824 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 15:58:58,969 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 15:58:59,102 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 15:58:59,230 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2020-07-21 15:58:59,354 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 15:58:59,470 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 15:58:59,574 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 15:58:59,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:06,035 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 15:59:07,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:07,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:10,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:10,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:13,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:13,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:15,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:16,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:16,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:16,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:17,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:17,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 15:59:39,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4195633 backedges. 9420 proven. 86466 refuted. 0 times theorem prover too weak. 4099747 trivial. 0 not checked. [2020-07-21 15:59:39,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573010434] [2020-07-21 15:59:39,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 15:59:39,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 31] total 33 [2020-07-21 15:59:39,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087041813] [2020-07-21 15:59:39,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-21 15:59:39,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 15:59:39,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-21 15:59:39,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2020-07-21 15:59:39,150 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 33 states. [2020-07-21 15:59:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 15:59:40,685 INFO L93 Difference]: Finished difference Result 217 states and 362 transitions. [2020-07-21 15:59:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-21 15:59:40,688 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 8307 [2020-07-21 15:59:40,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 15:59:40,699 INFO L225 Difference]: With dead ends: 217 [2020-07-21 15:59:40,699 INFO L226 Difference]: Without dead ends: 213 [2020-07-21 15:59:40,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16627 GetRequests, 16554 SyntacticMatches, 28 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2020-07-21 15:59:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-07-21 15:59:40,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2020-07-21 15:59:40,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-07-21 15:59:40,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 358 transitions. [2020-07-21 15:59:40,716 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 358 transitions. Word has length 8307 [2020-07-21 15:59:40,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 15:59:40,722 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 358 transitions. [2020-07-21 15:59:40,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-21 15:59:40,722 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 358 transitions. [2020-07-21 15:59:41,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13442 [2020-07-21 15:59:41,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 15:59:41,760 INFO L422 BasicCegarLoop]: trace histogram [1973, 1973, 1596, 986, 986, 986, 986, 986, 986, 986, 610, 377, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 15:59:41,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 15:59:41,971 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 15:59:41,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 15:59:41,976 INFO L82 PathProgramCache]: Analyzing trace with hash -982105371, now seen corresponding path program 20 times [2020-07-21 15:59:41,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 15:59:41,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122722761] [2020-07-21 15:59:41,977 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 15:59:47,624 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 15:59:47,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 15:59:47,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 29844 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-21 15:59:47,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:00:46,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10996742 backedges. 15500 proven. 151240 refuted. 0 times theorem prover too weak. 10830002 trivial. 0 not checked. [2020-07-21 16:00:46,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 16:00:49,179 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:00:49,288 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-21 16:00:49,410 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:00:49,516 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 16:00:50,403 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 16:00:50,509 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 16:00:50,643 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 16:00:50,775 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-21 16:00:52,127 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 16:00:52,260 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-21 16:00:52,398 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 16:00:52,538 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-21 16:00:54,012 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 16:00:57,116 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 16:00:57,273 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-21 16:00:57,432 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 16:00:57,605 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-21 16:01:03,535 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 16:01:03,730 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 16:01:03,923 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 16:01:04,123 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 69 [2020-07-21 16:01:13,718 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 16:01:13,921 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-21 16:01:14,124 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 16:01:14,337 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2020-07-21 16:01:27,834 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 16:01:28,009 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-07-21 16:01:28,194 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 16:01:28,436 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-21 16:01:28,662 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 105 [2020-07-21 16:01:28,871 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-07-21 16:01:29,091 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-07-21 16:01:29,287 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-07-21 16:01:29,464 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-07-21 16:01:29,670 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-07-21 16:01:29,865 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-21 16:01:30,046 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-21 16:01:30,221 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-21 16:01:30,389 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-21 16:01:30,550 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-07-21 16:01:30,695 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-21 16:01:30,830 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 16:01:30,952 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-21 16:01:31,070 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2020-07-21 16:01:31,184 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-07-21 16:01:31,288 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 49