/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -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 [2020-07-20 13:21:24,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 13:21:24,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 13:21:24,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 13:21:24,999 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 13:21:25,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 13:21:25,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 13:21:25,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 13:21:25,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 13:21:25,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 13:21:25,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 13:21:25,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 13:21:25,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 13:21:25,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 13:21:25,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 13:21:25,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 13:21:25,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 13:21:25,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 13:21:25,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 13:21:25,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 13:21:25,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 13:21:25,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 13:21:25,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 13:21:25,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 13:21:25,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 13:21:25,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 13:21:25,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 13:21:25,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 13:21:25,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-20 13:21:25,050 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 13:21:25,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 13:21:25,051 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 13:21:25,051 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 13:21:25,052 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 13:21:25,052 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 13:21:25,052 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 13:21:25,052 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 13:21:25,052 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 13:21:25,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 13:21:25,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 13:21:25,053 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 13:21:25,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 13:21:25,053 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 13:21:25,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 13:21:25,054 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 13:21:25,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 13:21:25,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 13:21:25,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 13:21:25,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 13:21:25,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 13:21:25,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:21:25,055 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 13:21:25,055 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 13:21:25,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 13:21:25,056 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 13:21:25,056 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:25,056 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 13:21:25,056 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 13:21:25,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 13:21:25,327 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 13:21:25,346 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 13:21:25,350 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 13:21:25,353 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 13:21:25,354 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 13:21:25,356 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2020-07-20 13:21:25,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439a80d3d/07196cdc06ce497d88224ba5ae073de6/FLAGe3ec4d7af [2020-07-20 13:21:25,915 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 13:21:25,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_25-2.c [2020-07-20 13:21:25,923 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439a80d3d/07196cdc06ce497d88224ba5ae073de6/FLAGe3ec4d7af [2020-07-20 13:21:26,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/439a80d3d/07196cdc06ce497d88224ba5ae073de6 [2020-07-20 13:21:26,308 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 13:21:26,311 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 13:21:26,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 13:21:26,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 13:21:26,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 13:21:26,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:21:26" (1/1) ... [2020-07-20 13:21:26,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29bc61ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:21:26, skipping insertion in model container [2020-07-20 13:21:26,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:21:26" (1/1) ... [2020-07-20 13:21:26,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 13:21:26,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 13:21:26,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:21:26,516 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 13:21:26,529 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 13:21:26,544 INFO L208 MainTranslator]: Completed translation [2020-07-20 13:21:26,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:21:26 WrapperNode [2020-07-20 13:21:26,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 13:21:26,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 13:21:26,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 13:21:26,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 13:21:26,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:21:26" (1/1) ... [2020-07-20 13:21:26,558 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:21:26" (1/1) ... [2020-07-20 13:21:26,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:21:26" (1/1) ... [2020-07-20 13:21:26,564 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:21:26" (1/1) ... [2020-07-20 13:21:26,567 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:21:26" (1/1) ... [2020-07-20 13:21:26,570 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:21:26" (1/1) ... [2020-07-20 13:21:26,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:21:26" (1/1) ... [2020-07-20 13:21:26,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 13:21:26,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 13:21:26,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 13:21:26,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 13:21:26,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:21:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 13:21:26,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 13:21:26,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 13:21:26,730 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-07-20 13:21:26,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 13:21:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 13:21:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 13:21:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-07-20 13:21:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 13:21:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 13:21:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 13:21:26,904 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 13:21:26,904 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 13:21:26,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:21:26 BoogieIcfgContainer [2020-07-20 13:21:26,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 13:21:26,909 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 13:21:26,909 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 13:21:26,913 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 13:21:26,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:21:26" (1/3) ... [2020-07-20 13:21:26,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df237c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:21:26, skipping insertion in model container [2020-07-20 13:21:26,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:21:26" (2/3) ... [2020-07-20 13:21:26,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df237c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:21:26, skipping insertion in model container [2020-07-20 13:21:26,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:21:26" (3/3) ... [2020-07-20 13:21:26,916 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_25-2.c [2020-07-20 13:21:26,926 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 13:21:26,933 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 13:21:26,947 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 13:21:26,972 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 13:21:26,972 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 13:21:26,972 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 13:21:26,972 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 13:21:26,972 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 13:21:26,973 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 13:21:26,973 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 13:21:26,973 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 13:21:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-07-20 13:21:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 13:21:26,998 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:26,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:21:27,000 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:27,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:27,005 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2020-07-20 13:21:27,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:27,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958362418] [2020-07-20 13:21:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:27,073 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:27,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:27,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:21:27,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:21:27,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:21:27,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958362418] [2020-07-20 13:21:27,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:21:27,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:21:27,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630520459] [2020-07-20 13:21:27,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:21:27,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:27,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:21:27,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:21:27,220 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2020-07-20 13:21:27,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:27,343 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-07-20 13:21:27,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:21:27,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 13:21:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:27,357 INFO L225 Difference]: With dead ends: 35 [2020-07-20 13:21:27,357 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 13:21:27,361 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 [2020-07-20 13:21:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 13:21:27,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 13:21:27,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 13:21:27,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 13:21:27,416 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2020-07-20 13:21:27,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:27,417 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 13:21:27,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:21:27,417 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 13:21:27,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 13:21:27,420 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:27,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:21:27,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:27,635 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:27,636 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2020-07-20 13:21:27,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:27,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301660329] [2020-07-20 13:21:27,637 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:27,663 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:27,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:27,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 13:21:27,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 13:21:27,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 13:21:27,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301660329] [2020-07-20 13:21:27,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 13:21:27,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 13:21:27,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729416105] [2020-07-20 13:21:27,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 13:21:27,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:27,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 13:21:27,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 13:21:27,709 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2020-07-20 13:21:27,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:27,762 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-07-20 13:21:27,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 13:21:27,763 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 13:21:27,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:27,765 INFO L225 Difference]: With dead ends: 27 [2020-07-20 13:21:27,765 INFO L226 Difference]: Without dead ends: 23 [2020-07-20 13:21:27,766 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 [2020-07-20 13:21:27,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-20 13:21:27,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-20 13:21:27,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 13:21:27,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-07-20 13:21:27,774 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2020-07-20 13:21:27,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:27,774 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-07-20 13:21:27,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 13:21:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-07-20 13:21:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 13:21:27,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:27,776 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] [2020-07-20 13:21:27,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:27,991 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:27,993 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2020-07-20 13:21:27,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:27,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554064252] [2020-07-20 13:21:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:28,026 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:28,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:28,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:21:28,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:28,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 13:21:28,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:28,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:28,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 13:21:28,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554064252] [2020-07-20 13:21:28,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:28,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 13:21:28,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203972844] [2020-07-20 13:21:28,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:21:28,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:28,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:21:28,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:21:28,393 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 9 states. [2020-07-20 13:21:28,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:28,518 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2020-07-20 13:21:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:21:28,519 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-20 13:21:28,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:28,521 INFO L225 Difference]: With dead ends: 32 [2020-07-20 13:21:28,521 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 13:21:28,522 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 [2020-07-20 13:21:28,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 13:21:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-07-20 13:21:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 13:21:28,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 13:21:28,531 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 26 [2020-07-20 13:21:28,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:28,532 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 13:21:28,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:21:28,532 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 13:21:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 13:21:28,534 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:28,534 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] [2020-07-20 13:21:28,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:28,750 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:28,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:28,751 INFO L82 PathProgramCache]: Analyzing trace with hash -983862936, now seen corresponding path program 1 times [2020-07-20 13:21:28,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:28,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263075060] [2020-07-20 13:21:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:28,781 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:28,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:28,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 13:21:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:28,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 13:21:28,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:28,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 13:21:28,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263075060] [2020-07-20 13:21:28,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:28,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2020-07-20 13:21:28,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541383942] [2020-07-20 13:21:28,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 13:21:28,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:28,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 13:21:28,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 13:21:28,987 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 9 states. [2020-07-20 13:21:29,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:29,063 INFO L93 Difference]: Finished difference Result 37 states and 54 transitions. [2020-07-20 13:21:29,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 13:21:29,064 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-07-20 13:21:29,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:29,067 INFO L225 Difference]: With dead ends: 37 [2020-07-20 13:21:29,067 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 13:21:29,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:21:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 13:21:29,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-07-20 13:21:29,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 13:21:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2020-07-20 13:21:29,077 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 27 [2020-07-20 13:21:29,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:29,078 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2020-07-20 13:21:29,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 13:21:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2020-07-20 13:21:29,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 13:21:29,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:29,080 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] [2020-07-20 13:21:29,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:29,295 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:29,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:29,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2027372739, now seen corresponding path program 2 times [2020-07-20 13:21:29,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:29,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703741217] [2020-07-20 13:21:29,298 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:29,338 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:29,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:29,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:21:29,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-07-20 13:21:29,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:29,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:29,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:29,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:29,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 13:21:29,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703741217] [2020-07-20 13:21:29,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:29,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 13:21:29,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573122474] [2020-07-20 13:21:29,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:21:29,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:29,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:21:29,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:21:29,782 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand 11 states. [2020-07-20 13:21:29,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:29,945 INFO L93 Difference]: Finished difference Result 42 states and 68 transitions. [2020-07-20 13:21:29,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:21:29,946 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-07-20 13:21:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:29,949 INFO L225 Difference]: With dead ends: 42 [2020-07-20 13:21:29,950 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 13:21:29,951 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 [2020-07-20 13:21:29,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 13:21:29,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2020-07-20 13:21:29,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 13:21:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 13:21:29,961 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 39 [2020-07-20 13:21:29,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:29,961 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 13:21:29,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:21:29,962 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 13:21:29,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 13:21:29,963 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:29,964 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] [2020-07-20 13:21:30,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:30,174 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:30,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1111873851, now seen corresponding path program 2 times [2020-07-20 13:21:30,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:30,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38732166] [2020-07-20 13:21:30,177 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:30,216 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:30,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:30,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 13:21:30,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-07-20 13:21:30,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:30,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:30,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:30,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-20 13:21:30,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38732166] [2020-07-20 13:21:30,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:30,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 11 [2020-07-20 13:21:30,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472848481] [2020-07-20 13:21:30,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 13:21:30,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:30,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 13:21:30,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-07-20 13:21:30,566 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 11 states. [2020-07-20 13:21:30,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:30,686 INFO L93 Difference]: Finished difference Result 47 states and 84 transitions. [2020-07-20 13:21:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 13:21:30,687 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-07-20 13:21:30,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:30,689 INFO L225 Difference]: With dead ends: 47 [2020-07-20 13:21:30,689 INFO L226 Difference]: Without dead ends: 43 [2020-07-20 13:21:30,690 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 [2020-07-20 13:21:30,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-20 13:21:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2020-07-20 13:21:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-20 13:21:30,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2020-07-20 13:21:30,700 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 41 [2020-07-20 13:21:30,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:30,706 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2020-07-20 13:21:30,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 13:21:30,706 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2020-07-20 13:21:30,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-07-20 13:21:30,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:30,709 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] [2020-07-20 13:21:30,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:30,924 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 3 times [2020-07-20 13:21:30,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:30,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900599570] [2020-07-20 13:21:30,926 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:30,967 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:30,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:30,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:21:30,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 79 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-07-20 13:21:31,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:31,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:31,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:31,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:31,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:31,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:31,691 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-07-20 13:21:31,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900599570] [2020-07-20 13:21:31,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:31,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 13:21:31,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211346087] [2020-07-20 13:21:31,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:21:31,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:31,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:21:31,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:21:31,694 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand 13 states. [2020-07-20 13:21:31,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:31,874 INFO L93 Difference]: Finished difference Result 52 states and 102 transitions. [2020-07-20 13:21:31,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:21:31,874 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 65 [2020-07-20 13:21:31,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:31,877 INFO L225 Difference]: With dead ends: 52 [2020-07-20 13:21:31,877 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 13:21:31,878 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 [2020-07-20 13:21:31,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 13:21:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2020-07-20 13:21:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 13:21:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 13:21:31,889 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 65 [2020-07-20 13:21:31,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:31,890 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 13:21:31,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:21:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 13:21:31,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-20 13:21:31,892 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:31,892 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] [2020-07-20 13:21:32,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:32,097 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:32,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:32,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1474757101, now seen corresponding path program 3 times [2020-07-20 13:21:32,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:32,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953944592] [2020-07-20 13:21:32,100 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:21:32,154 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:32,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:32,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 13:21:32,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 166 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2020-07-20 13:21:32,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:32,663 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:32,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:32,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:32,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 27 proven. 181 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2020-07-20 13:21:32,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953944592] [2020-07-20 13:21:32,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:32,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 13 [2020-07-20 13:21:32,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333184979] [2020-07-20 13:21:32,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 13:21:32,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:32,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 13:21:32,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-07-20 13:21:32,849 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 13 states. [2020-07-20 13:21:33,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:33,000 INFO L93 Difference]: Finished difference Result 57 states and 122 transitions. [2020-07-20 13:21:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 13:21:33,003 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-20 13:21:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:33,007 INFO L225 Difference]: With dead ends: 57 [2020-07-20 13:21:33,007 INFO L226 Difference]: Without dead ends: 53 [2020-07-20 13:21:33,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 172 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:21:33,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-20 13:21:33,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2020-07-20 13:21:33,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 13:21:33,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2020-07-20 13:21:33,021 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 96 [2020-07-20 13:21:33,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:33,022 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2020-07-20 13:21:33,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 13:21:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2020-07-20 13:21:33,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-07-20 13:21:33,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:33,025 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:21:33,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:33,239 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:33,241 INFO L82 PathProgramCache]: Analyzing trace with hash 838335741, now seen corresponding path program 4 times [2020-07-20 13:21:33,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:33,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176114735] [2020-07-20 13:21:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:21:33,311 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:33,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:33,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:21:33,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 244 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2020-07-20 13:21:33,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:34,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:34,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:34,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:34,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:34,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 54 proven. 266 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-07-20 13:21:34,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176114735] [2020-07-20 13:21:34,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:34,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 13:21:34,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247135620] [2020-07-20 13:21:34,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:21:34,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:34,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:21:34,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:21:34,371 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 15 states. [2020-07-20 13:21:34,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:34,656 INFO L93 Difference]: Finished difference Result 62 states and 144 transitions. [2020-07-20 13:21:34,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:21:34,656 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 117 [2020-07-20 13:21:34,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:34,659 INFO L225 Difference]: With dead ends: 62 [2020-07-20 13:21:34,659 INFO L226 Difference]: Without dead ends: 58 [2020-07-20 13:21:34,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 211 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:21:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-20 13:21:34,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-07-20 13:21:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 13:21:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 13:21:34,673 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 117 [2020-07-20 13:21:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:34,674 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 13:21:34,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:21:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 13:21:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-07-20 13:21:34,677 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:34,677 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 21, 13, 13, 13, 13, 13, 13, 13, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:21:34,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:34,891 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:34,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:34,892 INFO L82 PathProgramCache]: Analyzing trace with hash -2072922826, now seen corresponding path program 4 times [2020-07-20 13:21:34,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:34,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327592876] [2020-07-20 13:21:34,894 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:21:34,977 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:34,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:34,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 13:21:34,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 506 refuted. 0 times theorem prover too weak. 1334 trivial. 0 not checked. [2020-07-20 13:21:35,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:35,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:35,931 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:36,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:36,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:36,061 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:36,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 86 proven. 532 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2020-07-20 13:21:36,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327592876] [2020-07-20 13:21:36,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:36,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2020-07-20 13:21:36,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834093198] [2020-07-20 13:21:36,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 13:21:36,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:36,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 13:21:36,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-07-20 13:21:36,128 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 15 states. [2020-07-20 13:21:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:36,309 INFO L93 Difference]: Finished difference Result 67 states and 168 transitions. [2020-07-20 13:21:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 13:21:36,309 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 190 [2020-07-20 13:21:36,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:36,312 INFO L225 Difference]: With dead ends: 67 [2020-07-20 13:21:36,312 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 13:21:36,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 356 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-07-20 13:21:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 13:21:36,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-07-20 13:21:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-20 13:21:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 73 transitions. [2020-07-20 13:21:36,347 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 73 transitions. Word has length 190 [2020-07-20 13:21:36,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:36,348 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 73 transitions. [2020-07-20 13:21:36,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 13:21:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 73 transitions. [2020-07-20 13:21:36,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-07-20 13:21:36,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:36,360 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:21:36,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:36,561 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:36,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:36,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1082984306, now seen corresponding path program 5 times [2020-07-20 13:21:36,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:36,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944510996] [2020-07-20 13:21:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:21:36,686 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:36,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:36,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:21:36,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 967 refuted. 0 times theorem prover too weak. 3536 trivial. 0 not checked. [2020-07-20 13:21:36,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:37,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:38,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:38,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:38,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:38,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:38,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 159 proven. 1002 refuted. 0 times theorem prover too weak. 3501 trivial. 0 not checked. [2020-07-20 13:21:38,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944510996] [2020-07-20 13:21:38,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:38,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 13:21:38,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264836633] [2020-07-20 13:21:38,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:21:38,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:38,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:21:38,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:21:38,640 INFO L87 Difference]: Start difference. First operand 41 states and 73 transitions. Second operand 17 states. [2020-07-20 13:21:38,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:38,860 INFO L93 Difference]: Finished difference Result 72 states and 194 transitions. [2020-07-20 13:21:38,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:21:38,861 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 286 [2020-07-20 13:21:38,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:38,865 INFO L225 Difference]: With dead ends: 72 [2020-07-20 13:21:38,866 INFO L226 Difference]: Without dead ends: 68 [2020-07-20 13:21:38,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 545 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 13:21:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-20 13:21:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2020-07-20 13:21:38,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 13:21:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 13:21:38,898 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 286 [2020-07-20 13:21:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:38,899 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 13:21:38,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:21:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 13:21:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2020-07-20 13:21:38,908 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:38,909 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 35, 21, 21, 21, 21, 21, 21, 21, 14, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:21:39,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:39,123 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:39,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:39,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1101007572, now seen corresponding path program 5 times [2020-07-20 13:21:39,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:39,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037842040] [2020-07-20 13:21:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:21:39,246 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:39,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 13:21:39,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1061 refuted. 0 times theorem prover too weak. 3827 trivial. 0 not checked. [2020-07-20 13:21:39,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:40,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:40,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:41,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:41,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:41,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:41,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5047 backedges. 159 proven. 1101 refuted. 0 times theorem prover too weak. 3787 trivial. 0 not checked. [2020-07-20 13:21:41,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037842040] [2020-07-20 13:21:41,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:41,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 17 [2020-07-20 13:21:41,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149724325] [2020-07-20 13:21:41,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 13:21:41,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:41,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 13:21:41,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-07-20 13:21:41,321 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 17 states. [2020-07-20 13:21:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:41,562 INFO L93 Difference]: Finished difference Result 77 states and 222 transitions. [2020-07-20 13:21:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 13:21:41,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 300 [2020-07-20 13:21:41,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:41,567 INFO L225 Difference]: With dead ends: 77 [2020-07-20 13:21:41,567 INFO L226 Difference]: Without dead ends: 73 [2020-07-20 13:21:41,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 572 SyntacticMatches, 12 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2020-07-20 13:21:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-20 13:21:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2020-07-20 13:21:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-07-20 13:21:41,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2020-07-20 13:21:41,580 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 300 [2020-07-20 13:21:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:41,581 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2020-07-20 13:21:41,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 13:21:41,581 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2020-07-20 13:21:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2020-07-20 13:21:41,593 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:41,593 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 36, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:21:41,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:41,809 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:41,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:41,810 INFO L82 PathProgramCache]: Analyzing trace with hash -897924696, now seen corresponding path program 6 times [2020-07-20 13:21:41,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:41,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238209207] [2020-07-20 13:21:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:21:42,008 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:42,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:42,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:21:42,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12915 backedges. 306 proven. 1995 refuted. 0 times theorem prover too weak. 10614 trivial. 0 not checked. [2020-07-20 13:21:42,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:44,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:44,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:44,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:45,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:45,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:45,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:45,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:45,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12915 backedges. 306 proven. 2046 refuted. 0 times theorem prover too weak. 10563 trivial. 0 not checked. [2020-07-20 13:21:45,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238209207] [2020-07-20 13:21:45,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:45,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 13:21:45,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333303447] [2020-07-20 13:21:45,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 13:21:45,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:45,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 13:21:45,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:21:45,344 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand 19 states. [2020-07-20 13:21:45,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:45,693 INFO L93 Difference]: Finished difference Result 82 states and 252 transitions. [2020-07-20 13:21:45,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:21:45,698 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 468 [2020-07-20 13:21:45,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:45,703 INFO L225 Difference]: With dead ends: 82 [2020-07-20 13:21:45,704 INFO L226 Difference]: Without dead ends: 78 [2020-07-20 13:21:45,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 905 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 13:21:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-20 13:21:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2020-07-20 13:21:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 13:21:45,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 13:21:45,718 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 468 [2020-07-20 13:21:45,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:45,719 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 13:21:45,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 13:21:45,720 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 13:21:45,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-20 13:21:45,723 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:45,723 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 53, 32, 32, 32, 32, 32, 32, 32, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:21:45,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:45,937 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:45,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:45,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1350718391, now seen corresponding path program 6 times [2020-07-20 13:21:45,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:45,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178158968] [2020-07-20 13:21:45,939 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:21:46,147 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:46,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:46,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 13:21:46,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1918 refuted. 0 times theorem prover too weak. 9431 trivial. 0 not checked. [2020-07-20 13:21:46,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:48,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:48,674 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:48,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:48,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:48,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:49,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:49,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:49,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:49,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 11682 backedges. 333 proven. 1975 refuted. 0 times theorem prover too weak. 9374 trivial. 0 not checked. [2020-07-20 13:21:49,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178158968] [2020-07-20 13:21:49,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:49,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2020-07-20 13:21:49,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767912471] [2020-07-20 13:21:49,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 13:21:49,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:49,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 13:21:49,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-07-20 13:21:49,440 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 19 states. [2020-07-20 13:21:49,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:49,893 INFO L93 Difference]: Finished difference Result 87 states and 284 transitions. [2020-07-20 13:21:49,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 13:21:49,894 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-20 13:21:49,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:49,901 INFO L225 Difference]: With dead ends: 87 [2020-07-20 13:21:49,901 INFO L226 Difference]: Without dead ends: 83 [2020-07-20 13:21:49,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 868 SyntacticMatches, 14 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=211, Invalid=439, Unknown=0, NotChecked=0, Total=650 [2020-07-20 13:21:49,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-20 13:21:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 51. [2020-07-20 13:21:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 13:21:49,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 109 transitions. [2020-07-20 13:21:49,932 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 109 transitions. Word has length 450 [2020-07-20 13:21:49,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:49,933 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 109 transitions. [2020-07-20 13:21:49,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 13:21:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 109 transitions. [2020-07-20 13:21:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 872 [2020-07-20 13:21:49,943 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:49,943 INFO L422 BasicCegarLoop]: trace histogram [133, 133, 67, 66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:21:50,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:50,157 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:50,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1701713687, now seen corresponding path program 7 times [2020-07-20 13:21:50,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:50,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036829117] [2020-07-20 13:21:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:21:50,563 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:50,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:50,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1585 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 13:21:50,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 778 proven. 4406 refuted. 0 times theorem prover too weak. 40653 trivial. 0 not checked. [2020-07-20 13:21:51,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:21:53,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:53,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:55,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:55,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:55,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:56,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:56,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:56,354 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:56,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:56,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:56,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:56,528 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:21:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 45837 backedges. 778 proven. 4476 refuted. 0 times theorem prover too weak. 40583 trivial. 0 not checked. [2020-07-20 13:21:56,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036829117] [2020-07-20 13:21:56,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:21:56,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 13:21:56,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060998652] [2020-07-20 13:21:56,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 13:21:56,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:21:56,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 13:21:56,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 13:21:56,860 INFO L87 Difference]: Start difference. First operand 51 states and 109 transitions. Second operand 21 states. [2020-07-20 13:21:57,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:21:57,267 INFO L93 Difference]: Finished difference Result 92 states and 318 transitions. [2020-07-20 13:21:57,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:21:57,268 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 871 [2020-07-20 13:21:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:21:57,274 INFO L225 Difference]: With dead ends: 92 [2020-07-20 13:21:57,274 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 13:21:57,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1750 GetRequests, 1707 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 13:21:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 13:21:57,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-07-20 13:21:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 13:21:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-20 13:21:57,295 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 871 [2020-07-20 13:21:57,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:21:57,298 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-20 13:21:57,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 13:21:57,299 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-20 13:21:57,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1229 [2020-07-20 13:21:57,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:21:57,312 INFO L422 BasicCegarLoop]: trace histogram [179, 179, 147, 89, 89, 89, 89, 89, 89, 89, 58, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:21:57,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:21:57,526 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:21:57,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:21:57,527 INFO L82 PathProgramCache]: Analyzing trace with hash 104339052, now seen corresponding path program 7 times [2020-07-20 13:21:57,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:21:57,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284649147] [2020-07-20 13:21:57,528 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:21:57,975 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:21:57,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:21:57,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 2219 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 13:21:57,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:21:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 90119 backedges. 893 proven. 6738 refuted. 0 times theorem prover too weak. 82488 trivial. 0 not checked. [2020-07-20 13:21:58,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:22:02,570 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:02,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:03,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:04,506 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:04,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:04,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:04,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:05,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:05,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:05,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 90119 backedges. 893 proven. 6815 refuted. 0 times theorem prover too weak. 82411 trivial. 0 not checked. [2020-07-20 13:22:05,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284649147] [2020-07-20 13:22:05,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:22:05,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2020-07-20 13:22:05,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353470222] [2020-07-20 13:22:05,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 13:22:05,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:22:05,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 13:22:05,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-07-20 13:22:05,983 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 21 states. [2020-07-20 13:22:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:22:06,502 INFO L93 Difference]: Finished difference Result 97 states and 354 transitions. [2020-07-20 13:22:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 13:22:06,503 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 1228 [2020-07-20 13:22:06,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:22:06,510 INFO L225 Difference]: With dead ends: 97 [2020-07-20 13:22:06,510 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 13:22:06,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 2463 GetRequests, 2420 SyntacticMatches, 16 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-07-20 13:22:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 13:22:06,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2020-07-20 13:22:06,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-20 13:22:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2020-07-20 13:22:06,531 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 1228 [2020-07-20 13:22:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:22:06,534 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2020-07-20 13:22:06,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 13:22:06,534 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2020-07-20 13:22:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1951 [2020-07-20 13:22:06,571 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:22:06,572 INFO L422 BasicCegarLoop]: trace histogram [299, 299, 150, 149, 149, 149, 149, 149, 149, 149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:22:06,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:22:06,786 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:22:06,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:22:06,787 INFO L82 PathProgramCache]: Analyzing trace with hash 621098440, now seen corresponding path program 8 times [2020-07-20 13:22:06,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:22:06,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64167476] [2020-07-20 13:22:06,788 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:22:07,439 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:22:07,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:22:07,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 3543 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 13:22:07,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:22:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1708 proven. 11918 refuted. 0 times theorem prover too weak. 219708 trivial. 0 not checked. [2020-07-20 13:22:08,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:22:15,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:17,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:19,085 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:19,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:19,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:20,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:20,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:20,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:20,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:20,353 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:20,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:20,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 233334 backedges. 1708 proven. 12010 refuted. 0 times theorem prover too weak. 219616 trivial. 0 not checked. [2020-07-20 13:22:21,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64167476] [2020-07-20 13:22:21,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:22:21,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-20 13:22:21,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495595729] [2020-07-20 13:22:21,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 13:22:21,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:22:21,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 13:22:21,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-20 13:22:21,855 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand 23 states. [2020-07-20 13:22:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:22:22,258 INFO L93 Difference]: Finished difference Result 102 states and 392 transitions. [2020-07-20 13:22:22,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:22:22,259 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1950 [2020-07-20 13:22:22,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:22:22,266 INFO L225 Difference]: With dead ends: 102 [2020-07-20 13:22:22,266 INFO L226 Difference]: Without dead ends: 98 [2020-07-20 13:22:22,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3909 GetRequests, 3861 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-20 13:22:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-20 13:22:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2020-07-20 13:22:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 13:22:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-20 13:22:22,283 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1950 [2020-07-20 13:22:22,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:22:22,286 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-20 13:22:22,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 13:22:22,286 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-20 13:22:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1690 [2020-07-20 13:22:22,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:22:22,311 INFO L422 BasicCegarLoop]: trace histogram [245, 245, 212, 122, 122, 122, 122, 122, 122, 122, 90, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:22:22,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:22:22,526 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:22:22,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:22:22,527 INFO L82 PathProgramCache]: Analyzing trace with hash 249367267, now seen corresponding path program 8 times [2020-07-20 13:22:22,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:22:22,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767101799] [2020-07-20 13:22:22,527 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:22:23,135 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:22:23,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:22:23,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 3051 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 13:22:23,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:22:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1545 proven. 10458 refuted. 0 times theorem prover too weak. 159447 trivial. 0 not checked. [2020-07-20 13:22:24,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:22:29,294 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:31,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:31,902 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:33,423 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:33,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:34,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:34,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:34,344 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:34,558 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:34,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:34,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 171450 backedges. 1545 proven. 10558 refuted. 0 times theorem prover too weak. 159347 trivial. 0 not checked. [2020-07-20 13:22:35,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767101799] [2020-07-20 13:22:35,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:22:35,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 23 [2020-07-20 13:22:35,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793693848] [2020-07-20 13:22:35,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 13:22:35,805 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:22:35,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 13:22:35,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-07-20 13:22:35,806 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 23 states. [2020-07-20 13:22:36,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:22:36,325 INFO L93 Difference]: Finished difference Result 107 states and 432 transitions. [2020-07-20 13:22:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 13:22:36,326 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 1689 [2020-07-20 13:22:36,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:22:36,332 INFO L225 Difference]: With dead ends: 107 [2020-07-20 13:22:36,332 INFO L226 Difference]: Without dead ends: 103 [2020-07-20 13:22:36,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3386 GetRequests, 3338 SyntacticMatches, 18 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-07-20 13:22:36,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-20 13:22:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 61. [2020-07-20 13:22:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-07-20 13:22:36,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-07-20 13:22:36,351 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 1689 [2020-07-20 13:22:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:22:36,353 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-07-20 13:22:36,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 13:22:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-07-20 13:22:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2341 [2020-07-20 13:22:36,397 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:22:36,398 INFO L422 BasicCegarLoop]: trace histogram [359, 359, 180, 179, 179, 179, 179, 179, 179, 179, 179, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:22:36,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:22:36,614 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:22:36,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:22:36,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1393099828, now seen corresponding path program 9 times [2020-07-20 13:22:36,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:22:36,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325787086] [2020-07-20 13:22:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:22:37,400 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:22:37,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:22:37,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 4248 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 13:22:37,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:22:39,812 INFO L134 CoverageAnalysis]: Checked inductivity of 336699 backedges. 2291 proven. 16027 refuted. 0 times theorem prover too weak. 318381 trivial. 0 not checked. [2020-07-20 13:22:39,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:22:47,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:51,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:53,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:54,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:54,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:54,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:54,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:55,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:55,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:55,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:55,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:55,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:22:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 336699 backedges. 2291 proven. 16144 refuted. 0 times theorem prover too weak. 318264 trivial. 0 not checked. [2020-07-20 13:22:57,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325787086] [2020-07-20 13:22:57,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:22:57,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-20 13:22:57,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967708814] [2020-07-20 13:22:57,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 13:22:57,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:22:57,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 13:22:57,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-20 13:22:57,407 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 25 states. [2020-07-20 13:22:58,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:22:58,209 INFO L93 Difference]: Finished difference Result 112 states and 474 transitions. [2020-07-20 13:22:58,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 13:22:58,211 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 2340 [2020-07-20 13:22:58,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:22:58,217 INFO L225 Difference]: With dead ends: 112 [2020-07-20 13:22:58,218 INFO L226 Difference]: Without dead ends: 108 [2020-07-20 13:22:58,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4690 GetRequests, 4637 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 13:22:58,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-20 13:22:58,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2020-07-20 13:22:58,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 13:22:58,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-20 13:22:58,234 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 2340 [2020-07-20 13:22:58,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:22:58,236 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-20 13:22:58,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 13:22:58,237 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-20 13:22:58,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3057 [2020-07-20 13:22:58,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:22:58,310 INFO L422 BasicCegarLoop]: trace histogram [447, 447, 367, 223, 223, 223, 223, 223, 223, 223, 144, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:22:58,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:22:58,516 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:22:58,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:22:58,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1980951758, now seen corresponding path program 9 times [2020-07-20 13:22:58,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:22:58,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373242332] [2020-07-20 13:22:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:22:59,576 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:22:59,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:22:59,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 5515 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 13:22:59,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:23:03,675 INFO L134 CoverageAnalysis]: Checked inductivity of 564897 backedges. 2882 proven. 21700 refuted. 0 times theorem prover too weak. 540315 trivial. 0 not checked. [2020-07-20 13:23:03,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:23:14,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:19,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:20,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:20,966 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:22,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:23,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:23,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:23,858 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:23,959 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:23,960 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:24,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:24,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 564897 backedges. 2882 proven. 21826 refuted. 0 times theorem prover too weak. 540189 trivial. 0 not checked. [2020-07-20 13:23:27,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373242332] [2020-07-20 13:23:27,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:23:27,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 23] total 25 [2020-07-20 13:23:27,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253859388] [2020-07-20 13:23:27,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 13:23:27,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:23:27,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 13:23:27,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-07-20 13:23:27,005 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 25 states. [2020-07-20 13:23:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:23:27,895 INFO L93 Difference]: Finished difference Result 117 states and 518 transitions. [2020-07-20 13:23:27,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 13:23:27,896 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 3056 [2020-07-20 13:23:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:23:27,903 INFO L225 Difference]: With dead ends: 117 [2020-07-20 13:23:27,904 INFO L226 Difference]: Without dead ends: 113 [2020-07-20 13:23:27,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6121 GetRequests, 6068 SyntacticMatches, 20 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2020-07-20 13:23:27,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-20 13:23:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-07-20 13:23:27,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 13:23:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 178 transitions. [2020-07-20 13:23:27,924 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 178 transitions. Word has length 3056 [2020-07-20 13:23:27,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:23:27,927 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 178 transitions. [2020-07-20 13:23:27,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 13:23:27,927 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 178 transitions. [2020-07-20 13:23:28,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4733 [2020-07-20 13:23:28,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:23:28,117 INFO L422 BasicCegarLoop]: trace histogram [727, 727, 364, 363, 363, 363, 363, 363, 363, 363, 363, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:23:28,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:23:28,331 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:23:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:23:28,335 INFO L82 PathProgramCache]: Analyzing trace with hash 695057410, now seen corresponding path program 10 times [2020-07-20 13:23:28,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:23:28,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001711949] [2020-07-20 13:23:28,336 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:23:29,864 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:23:29,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:23:29,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 8588 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 13:23:29,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:23:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1384119 backedges. 5109 proven. 36414 refuted. 0 times theorem prover too weak. 1342596 trivial. 0 not checked. [2020-07-20 13:23:37,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:23:53,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:23:53,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:03,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:08,193 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:10,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:11,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:12,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:12,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:13,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:13,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:13,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:13,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:24:21,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1384119 backedges. 5109 proven. 36559 refuted. 0 times theorem prover too weak. 1342451 trivial. 0 not checked. [2020-07-20 13:24:21,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001711949] [2020-07-20 13:24:21,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:24:21,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-20 13:24:21,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81905085] [2020-07-20 13:24:21,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 13:24:21,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:24:21,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 13:24:21,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:24:21,672 INFO L87 Difference]: Start difference. First operand 66 states and 178 transitions. Second operand 27 states. [2020-07-20 13:24:23,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:24:23,049 INFO L93 Difference]: Finished difference Result 122 states and 564 transitions. [2020-07-20 13:24:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 13:24:23,051 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 4732 [2020-07-20 13:24:23,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:24:23,068 INFO L225 Difference]: With dead ends: 122 [2020-07-20 13:24:23,068 INFO L226 Difference]: Without dead ends: 118 [2020-07-20 13:24:23,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9475 GetRequests, 9417 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 13:24:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-20 13:24:23,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 71. [2020-07-20 13:24:23,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 13:24:23,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-20 13:24:23,103 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 4732 [2020-07-20 13:24:23,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:24:23,107 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-20 13:24:23,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 13:24:23,108 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-20 13:24:23,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7737 [2020-07-20 13:24:23,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:24:23,470 INFO L422 BasicCegarLoop]: trace histogram [1139, 1139, 895, 569, 569, 569, 569, 569, 569, 569, 326, 244, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:24:23,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:24:23,678 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:24:23,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:24:23,682 INFO L82 PathProgramCache]: Analyzing trace with hash -885154388, now seen corresponding path program 10 times [2020-07-20 13:24:23,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:24:23,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915882087] [2020-07-20 13:24:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:24:26,010 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:24:26,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:24:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 13964 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 13:24:26,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:24:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 3638813 backedges. 6811 proven. 62742 refuted. 0 times theorem prover too weak. 3569260 trivial. 0 not checked. [2020-07-20 13:24:45,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:25:17,213 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:29,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:29,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:34,485 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 13:25:36,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:36,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:39,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:39,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:41,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:41,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:42,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:42,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:42,939 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:43,200 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:43,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:43,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:43,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:25:43,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:26:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3638813 backedges. 6811 proven. 62897 refuted. 0 times theorem prover too weak. 3569105 trivial. 0 not checked. [2020-07-20 13:26:03,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915882087] [2020-07-20 13:26:03,524 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:26:03,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 27 [2020-07-20 13:26:03,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068406421] [2020-07-20 13:26:03,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 13:26:03,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:26:03,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 13:26:03,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-07-20 13:26:03,532 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 27 states. [2020-07-20 13:26:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:26:04,873 INFO L93 Difference]: Finished difference Result 127 states and 612 transitions. [2020-07-20 13:26:04,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 13:26:04,877 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 7736 [2020-07-20 13:26:04,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:26:04,887 INFO L225 Difference]: With dead ends: 127 [2020-07-20 13:26:04,887 INFO L226 Difference]: Without dead ends: 123 [2020-07-20 13:26:04,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15482 GetRequests, 15424 SyntacticMatches, 22 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=459, Invalid=947, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 13:26:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-20 13:26:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2020-07-20 13:26:04,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-07-20 13:26:04,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 205 transitions. [2020-07-20 13:26:04,915 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 205 transitions. Word has length 7736 [2020-07-20 13:26:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:26:04,921 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 205 transitions. [2020-07-20 13:26:04,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 13:26:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 205 transitions. [2020-07-20 13:26:05,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6631 [2020-07-20 13:26:05,444 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:26:05,449 INFO L422 BasicCegarLoop]: trace histogram [1019, 1019, 510, 509, 509, 509, 509, 509, 509, 509, 509, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:26:05,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:26:05,663 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:26:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:26:05,666 INFO L82 PathProgramCache]: Analyzing trace with hash -629593500, now seen corresponding path program 11 times [2020-07-20 13:26:05,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:26:05,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174252997] [2020-07-20 13:26:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:26:07,942 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:26:07,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:26:07,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 12035 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 13:26:08,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:26:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2721114 backedges. 6647 proven. 57292 refuted. 0 times theorem prover too weak. 2657175 trivial. 0 not checked. [2020-07-20 13:26:21,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:26:55,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:05,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:06,024 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 13:27:14,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:14,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:18,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:18,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:21,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:23,050 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:23,051 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:23,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:23,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,494 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:24,932 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:25,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:27:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2721114 backedges. 6647 proven. 57468 refuted. 0 times theorem prover too weak. 2656999 trivial. 0 not checked. [2020-07-20 13:27:39,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174252997] [2020-07-20 13:27:39,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:27:39,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-20 13:27:39,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775612626] [2020-07-20 13:27:39,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 13:27:39,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:27:39,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 13:27:39,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-20 13:27:39,483 INFO L87 Difference]: Start difference. First operand 71 states and 205 transitions. Second operand 29 states. [2020-07-20 13:27:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:27:41,359 INFO L93 Difference]: Finished difference Result 132 states and 662 transitions. [2020-07-20 13:27:41,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 13:27:41,361 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 6630 [2020-07-20 13:27:41,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:27:41,370 INFO L225 Difference]: With dead ends: 132 [2020-07-20 13:27:41,371 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 13:27:41,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13272 GetRequests, 13209 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 13:27:41,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 13:27:41,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 76. [2020-07-20 13:27:41,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 13:27:41,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-20 13:27:41,401 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 6630 [2020-07-20 13:27:41,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:27:41,405 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-20 13:27:41,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 13:27:41,406 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-20 13:27:41,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5470 [2020-07-20 13:27:41,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:27:41,750 INFO L422 BasicCegarLoop]: trace histogram [809, 809, 608, 404, 404, 404, 404, 404, 404, 404, 204, 201, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:27:41,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:27:41,965 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:27:41,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:27:41,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1327533009, now seen corresponding path program 11 times [2020-07-20 13:27:41,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:27:41,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234285502] [2020-07-20 13:27:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:27:43,974 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:27:43,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:27:44,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 9883 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 13:27:44,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:27:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1817496 backedges. 5499 proven. 47934 refuted. 0 times theorem prover too weak. 1764063 trivial. 0 not checked. [2020-07-20 13:27:54,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:27:59,746 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:27:59,854 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:27:59,959 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:28:02,608 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:28:02,816 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 13:28:02,927 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 13:28:03,049 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2020-07-20 13:28:03,159 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-07-20 13:28:03,263 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2020-07-20 13:28:03,369 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-07-20 13:28:34,749 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:28:34,857 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:28:34,975 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:28:35,114 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:28:35,253 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:28:35,377 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 13:28:35,492 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:28:36,345 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:36,346 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:28:52,063 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:02,063 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:29:02,170 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:29:02,343 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:29:02,455 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:29:03,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:03,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:09,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:09,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:09,558 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 13:29:13,868 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:13,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:16,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:16,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:18,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:18,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:19,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:19,415 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:19,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:19,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:19,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:29:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1817496 backedges. 5499 proven. 48121 refuted. 0 times theorem prover too weak. 1763876 trivial. 0 not checked. [2020-07-20 13:29:33,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234285502] [2020-07-20 13:29:33,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 13:29:33,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 27] total 29 [2020-07-20 13:29:33,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935289504] [2020-07-20 13:29:33,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-20 13:29:33,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 13:29:33,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-20 13:29:33,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-07-20 13:29:33,803 INFO L87 Difference]: Start difference. First operand 76 states and 234 transitions. Second operand 29 states. [2020-07-20 13:29:35,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 13:29:35,889 INFO L93 Difference]: Finished difference Result 137 states and 714 transitions. [2020-07-20 13:29:35,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 13:29:35,891 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 5469 [2020-07-20 13:29:35,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 13:29:35,903 INFO L225 Difference]: With dead ends: 137 [2020-07-20 13:29:35,903 INFO L226 Difference]: Without dead ends: 133 [2020-07-20 13:29:35,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10949 GetRequests, 10886 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=536, Invalid=1104, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 13:29:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-20 13:29:35,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 76. [2020-07-20 13:29:35,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-07-20 13:29:35,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 234 transitions. [2020-07-20 13:29:35,938 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 234 transitions. Word has length 5469 [2020-07-20 13:29:35,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 13:29:35,941 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 234 transitions. [2020-07-20 13:29:35,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-20 13:29:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 234 transitions. [2020-07-20 13:29:37,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12637 [2020-07-20 13:29:37,543 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 13:29:37,548 INFO L422 BasicCegarLoop]: trace histogram [1943, 1943, 972, 971, 971, 971, 971, 971, 971, 971, 971, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 13:29:37,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 13:29:37,749 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 13:29:37,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 13:29:37,753 INFO L82 PathProgramCache]: Analyzing trace with hash 2123078736, now seen corresponding path program 12 times [2020-07-20 13:29:37,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 13:29:37,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254229788] [2020-07-20 13:29:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-20 13:29:42,018 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 13:29:42,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 13:29:42,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 22928 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 13:29:42,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 13:30:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 9901287 backedges. 13939 proven. 119225 refuted. 0 times theorem prover too weak. 9768123 trivial. 0 not checked. [2020-07-20 13:30:38,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 13:30:41,820 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:30:41,940 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:30:43,094 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:30:43,201 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:30:43,320 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:30:43,436 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:30:51,197 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:30:51,326 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:30:51,464 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:30:51,603 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:30:56,112 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:30:56,233 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-07-20 13:30:56,356 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:30:56,477 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:30:56,584 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-07-20 13:32:02,098 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:32:02,205 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:32:03,814 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:32:03,927 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:32:05,381 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:32:05,506 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:32:05,643 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:32:05,779 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:32:09,362 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:32:09,508 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:32:09,683 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:32:09,839 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:32:18,503 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:32:18,657 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:32:18,826 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:32:18,993 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-07-20 13:32:19,147 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-07-20 13:32:19,291 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-07-20 13:32:19,437 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-07-20 13:32:19,574 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 13:32:19,708 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-07-20 13:32:19,827 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-07-20 13:32:19,934 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 63 [2020-07-20 13:32:20,037 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:32:20,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:33:36,955 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 13:33:37,066 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:33:37,169 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 13:33:38,741 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 13:33:38,951 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:33:39,065 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2020-07-20 13:33:40,391 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:33:40,506 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-07-20 13:33:40,636 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:33:40,762 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2020-07-20 13:33:45,252 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:33:45,413 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 13:33:45,567 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:33:45,708 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2020-07-20 13:33:45,849 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-07-20 13:33:45,995 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 75 [2020-07-20 13:33:46,134 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-07-20 13:33:46,266 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-07-20 13:33:46,389 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-07-20 13:33:46,495 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2020-07-20 13:33:47,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:33:47,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:04,454 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 13:34:17,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:17,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:25,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:31,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:33,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:36,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:36,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:36,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:37,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:37,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:37,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 13:34:37,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts